From 4531dc5e09e0f5abd115d33322d21fb163ec879e Mon Sep 17 00:00:00 2001
From: Stefano Pigozzi <me@steffo.eu>
Date: Mon, 4 Oct 2021 19:41:45 +0200
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=A5=20Shuffle=20everything=20around=20?=
 =?UTF-8?q?until=20it=20makes=20sense?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .idea/inspectionProfiles/Project_Default.xml  |  1 +
 .../Test_sophon_frontend.xml                  | 12 ---
 frontend/src/App.tsx                          | 16 +--
 .../src/components/elements/SophonFooter.tsx  | 42 ++++++++
 .../instance/SophonInstanceContainer.tsx      | 57 +++++++++++
 .../instance/SophonInstanceContext.tsx        |  4 +-
 .../instance/SophonInstanceFooter.tsx         | 40 --------
 ...ickerBox.tsx => SophonInstanceFormBox.tsx} | 25 ++++-
 .../instance/SophonInstanceHeading.tsx        | 26 -----
 .../instance/SophonInstancePage.tsx           | 34 +++++++
 .../instance/SophonInstancePageTitle.tsx      | 25 -----
 .../instance/SophonInstanceProvider.tsx       | 16 ++-
 .../instance/SophonInstanceRouter.tsx         | 32 ++++++
 .../{Interfaces.ts => SophonInstanceState.ts} | 16 +--
 frontend/src/components/instance/index.ts     | 11 ++-
 .../src/components/instance/useSophonAxios.ts |  7 +-
 .../components/instance/useSophonInstance.ts  | 10 +-
 .../instance/useSophonInstanceLoader.ts       | 47 +++++++++
 .../src/components/login/LoginContainer.tsx   | 25 +++++
 .../src/components/login/LoginContext.tsx     |  8 ++
 .../src/components/login/LoginFormBox.tsx     | 97 +++++++++++++++++++
 .../src/components/login/LoginGuestBox.tsx    | 18 ++++
 frontend/src/components/login/LoginPage.tsx   | 19 ++++
 .../src/components/login/LoginProvider.tsx    | 28 ++++++
 frontend/src/components/login/LoginRouter.tsx | 21 ++++
 frontend/src/components/login/LoginState.ts   | 62 ++++++++++++
 frontend/src/components/login/useLogin.ts     |  7 ++
 .../src/components/login/useLoginAxios.ts     | 15 +++
 .../src/components/placeholder/DebugBox.tsx   | 20 ++++
 .../routing/LocationViewSetRouter.tsx         | 17 ++--
 .../src/components/routing/ResourceRouter.tsx | 52 ++++++++++
 .../src/components/routing/ViewSetRouter.tsx  | 35 +++----
 frontend/src/components/routing/index.ts      |  3 +
 .../ThemedBluelib.tsx}                        | 14 ++-
 frontend/src/components/theme/ThemedTitle.tsx | 24 +++++
 frontend/src/constants.ts                     |  1 +
 frontend/src/contexts/authorization.tsx       | 94 ++++++++++++++++++
 frontend/src/contexts/instance.tsx            | 83 ++++++++++++++++
 frontend/src/contexts/theme.tsx               | 74 ++++++++++++++
 .../{useCancellable.ts => useAbortEffect.ts}  |  0
 frontend/src/hooks/useAsDocumentTitle.ts      | 10 ++
 frontend/src/hooks/useDefinedContext.ts       | 18 ++++
 frontend/src/hooks/useManagedViewSet.ts       |  6 +-
 frontend/src/hooks/useNotNullContext.ts       | 17 ----
 frontend/src/hooks/useSophonPath.ts           | 16 +++
 frontend/src/hooks/useStorageState.ts         |  2 +-
 frontend/src/hooks/useViewSet.ts              | 14 ++-
 frontend/src/routes/LoginPage.tsx             | 26 -----
 frontend/src/routes/Router.jsx                | 22 -----
 frontend/src/types/ContextTypes.ts            |  8 ++
 frontend/src/types/DjangoTypes.ts             | 27 ++++++
 frontend/src/types/ExtraTypes.ts              | 17 ++++
 frontend/src/types/SophonTypes.ts             | 74 ++++++++++++++
 frontend/src/types/index.ts                   |  3 +
 frontend/src/utils/DjangoTypes.ts             | 22 -----
 frontend/src/utils/InstanceEncoder.test.js    | 57 +++++++----
 frontend/src/utils/InstanceEncoder.ts         | 11 ++-
 frontend/src/utils/KeySet.ts                  | 68 -------------
 ...PathSplitter.test.js => ParsePath.test.js} | 16 +--
 .../utils/{PathSplitter.ts => ParsePath.ts}   | 22 +++--
 frontend/src/utils/SophonTypes.ts             | 66 -------------
 61 files changed, 1208 insertions(+), 452 deletions(-)
 delete mode 100644 .idea/runConfigurations/Test_sophon_frontend.xml
 create mode 100644 frontend/src/components/elements/SophonFooter.tsx
 create mode 100644 frontend/src/components/instance/SophonInstanceContainer.tsx
 delete mode 100644 frontend/src/components/instance/SophonInstanceFooter.tsx
 rename frontend/src/components/instance/{SophonInstancePickerBox.tsx => SophonInstanceFormBox.tsx} (73%)
 delete mode 100644 frontend/src/components/instance/SophonInstanceHeading.tsx
 create mode 100644 frontend/src/components/instance/SophonInstancePage.tsx
 delete mode 100644 frontend/src/components/instance/SophonInstancePageTitle.tsx
 create mode 100644 frontend/src/components/instance/SophonInstanceRouter.tsx
 rename frontend/src/components/instance/{Interfaces.ts => SophonInstanceState.ts} (53%)
 create mode 100644 frontend/src/components/instance/useSophonInstanceLoader.ts
 create mode 100644 frontend/src/components/login/LoginContainer.tsx
 create mode 100644 frontend/src/components/login/LoginContext.tsx
 create mode 100644 frontend/src/components/login/LoginFormBox.tsx
 create mode 100644 frontend/src/components/login/LoginGuestBox.tsx
 create mode 100644 frontend/src/components/login/LoginPage.tsx
 create mode 100644 frontend/src/components/login/LoginProvider.tsx
 create mode 100644 frontend/src/components/login/LoginRouter.tsx
 create mode 100644 frontend/src/components/login/LoginState.ts
 create mode 100644 frontend/src/components/login/useLogin.ts
 create mode 100644 frontend/src/components/login/useLoginAxios.ts
 create mode 100644 frontend/src/components/placeholder/DebugBox.tsx
 create mode 100644 frontend/src/components/routing/ResourceRouter.tsx
 create mode 100644 frontend/src/components/routing/index.ts
 rename frontend/src/components/{instance/SophonInstanceBluelib.tsx => theme/ThemedBluelib.tsx} (50%)
 create mode 100644 frontend/src/components/theme/ThemedTitle.tsx
 create mode 100644 frontend/src/contexts/authorization.tsx
 create mode 100644 frontend/src/contexts/instance.tsx
 create mode 100644 frontend/src/contexts/theme.tsx
 rename frontend/src/hooks/{useCancellable.ts => useAbortEffect.ts} (100%)
 create mode 100644 frontend/src/hooks/useAsDocumentTitle.ts
 create mode 100644 frontend/src/hooks/useDefinedContext.ts
 delete mode 100644 frontend/src/hooks/useNotNullContext.ts
 create mode 100644 frontend/src/hooks/useSophonPath.ts
 delete mode 100644 frontend/src/routes/LoginPage.tsx
 delete mode 100644 frontend/src/routes/Router.jsx
 create mode 100644 frontend/src/types/ContextTypes.ts
 create mode 100644 frontend/src/types/DjangoTypes.ts
 create mode 100644 frontend/src/types/ExtraTypes.ts
 create mode 100644 frontend/src/types/SophonTypes.ts
 create mode 100644 frontend/src/types/index.ts
 delete mode 100644 frontend/src/utils/DjangoTypes.ts
 delete mode 100644 frontend/src/utils/KeySet.ts
 rename frontend/src/utils/{PathSplitter.test.js => ParsePath.test.js} (74%)
 rename frontend/src/utils/{PathSplitter.ts => ParsePath.ts} (55%)
 delete mode 100644 frontend/src/utils/SophonTypes.ts

diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index e4369d0..e101d3f 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -2,6 +2,7 @@
   <profile version="1.0">
     <option name="myName" value="Project Default" />
     <inspection_tool class="CssUnresolvedCustomProperty" enabled="false" level="ERROR" enabled_by_default="false" />
+    <inspection_tool class="DuplicatedCode" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
     <inspection_tool class="HttpUrlsUsage" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
     <inspection_tool class="InconsistentLineSeparators" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="JupyterPackageInspection" enabled="true" level="ERROR" enabled_by_default="true" />
diff --git a/.idea/runConfigurations/Test_sophon_frontend.xml b/.idea/runConfigurations/Test_sophon_frontend.xml
deleted file mode 100644
index 4e33883..0000000
--- a/.idea/runConfigurations/Test_sophon_frontend.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Test sophon frontend" type="js.build_tools.npm">
-    <package-json value="$PROJECT_DIR$/frontend/package.json" />
-    <command value="run" />
-    <scripts>
-      <script value="test" />
-    </scripts>
-    <node-interpreter value="project" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 3cf7c3c..871cde7 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,21 +1,9 @@
 import * as React from 'react';
-import {LayoutThreeCol} from "@steffo/bluelib-react";
-import {SophonInstanceFooter} from "./components/instance/SophonInstanceFooter";
-import * as Instance from "./components/instance"
+import {SophonInstanceContainer} from "./components/instance/SophonInstanceContainer";
 
 
 export default function App() {
     return (
-        <Instance.Provider>
-            <Instance.Bluelib>
-                <Instance.PageTitle/>
-                <LayoutThreeCol>
-                    <LayoutThreeCol.Center>
-                        <Instance.Heading level={1}/>
-                        <SophonInstanceFooter/>
-                    </LayoutThreeCol.Center>
-                </LayoutThreeCol>
-            </Instance.Bluelib>
-        </Instance.Provider>
+        <SophonInstanceContainer/>
     );
 }
diff --git a/frontend/src/components/elements/SophonFooter.tsx b/frontend/src/components/elements/SophonFooter.tsx
new file mode 100644
index 0000000..1448d91
--- /dev/null
+++ b/frontend/src/components/elements/SophonFooter.tsx
@@ -0,0 +1,42 @@
+import * as React from "react"
+import {Anchor, Footer} from "@steffo/bluelib-react";
+
+
+/**
+ * A map of environments to bluelibClassNames to apply to the {@link SophonFooter}.
+ */
+const FOOTER_COLORS = {
+    development: "color-yellow",
+    test: "color-cyan",
+    production: "",
+}
+
+
+/**
+ * Component which renders the footer displayed at the bottom of every page.
+ *
+ * Changes color based on the current environment (see {@link FOOTER_COLORS}):
+ *
+ * - **yellow** for `development`;
+ * - **cyan** for `test`;
+ * - **foreground** for `production`.
+ *
+ * @constructor
+ */
+export function SophonFooter(): JSX.Element {
+    return (
+        <Footer bluelibClassNames={FOOTER_COLORS[process.env.NODE_ENV]}>
+            <span>
+                © {new Date().getFullYear()} Stefano Pigozzi
+            </span>
+            &nbsp;|&nbsp;
+            <Anchor href={"https://github.com/Steffo99/sophon/blob/main/LICENSE.txt"}>
+                AGPL 3.0+
+            </Anchor>
+            &nbsp;|&nbsp;
+            <Anchor href={"https://github.com/Steffo99/sophon"}>
+                GitHub
+            </Anchor>
+        </Footer>
+    )
+}
diff --git a/frontend/src/components/instance/SophonInstanceContainer.tsx b/frontend/src/components/instance/SophonInstanceContainer.tsx
new file mode 100644
index 0000000..0c97890
--- /dev/null
+++ b/frontend/src/components/instance/SophonInstanceContainer.tsx
@@ -0,0 +1,57 @@
+import * as React from "react"
+import * as Instance from "./index"
+import {LayoutThreeCol} from "@steffo/bluelib-react"
+import {ErrorCatcherBox} from "../errors/ErrorCatcherBox"
+import {SophonFooter} from "../elements/SophonFooter"
+import * as Reach from "@reach/router"
+import {RouteComponentProps} from "@reach/router"
+import {SophonInstanceRouter} from "./SophonInstanceRouter"
+import {SophonInstancePage} from "./SophonInstancePage"
+import {EMPTY_OBJECT} from "../../constants"
+import {LoginContainer} from "../login/LoginContainer";
+
+
+export interface SophonInstanceContainerProps {
+
+}
+
+
+/**
+ *
+ *
+ * @constructor
+ */
+const DefaultRoute = (_: RouteComponentProps) => (
+    <SophonInstanceRouter
+        unselectedRoute={<SophonInstancePage/>}
+        unselectedProps={EMPTY_OBJECT}
+        selectedRoute={<LoginContainer/>}
+        selectedProps={EMPTY_OBJECT}
+    />
+)
+
+
+/**
+ * The main rendered object for the SophonInstance context.
+ *
+ * @constructor
+ */
+export function SophonInstanceContainer({}: SophonInstanceContainerProps): JSX.Element {
+    return (
+        <Instance.Provider>
+            <Instance.Bluelib>
+                <LayoutThreeCol>
+                    <LayoutThreeCol.Center>
+                        <Instance.Heading level={1}/>
+                        <ErrorCatcherBox>
+                            <Reach.Router>
+                                <DefaultRoute default/>
+                            </Reach.Router>
+                        </ErrorCatcherBox>
+                        <SophonFooter/>
+                    </LayoutThreeCol.Center>
+                </LayoutThreeCol>
+            </Instance.Bluelib>
+        </Instance.Provider>
+    )
+}
diff --git a/frontend/src/components/instance/SophonInstanceContext.tsx b/frontend/src/components/instance/SophonInstanceContext.tsx
index df6ea15..b026a09 100644
--- a/frontend/src/components/instance/SophonInstanceContext.tsx
+++ b/frontend/src/components/instance/SophonInstanceContext.tsx
@@ -1,8 +1,10 @@
 import * as React from "react"
-import {SophonInstanceContextData} from "./Interfaces";
+import {SophonInstanceContextData} from "./SophonInstanceState";
 
 
 /**
  * The context that contains all the data about the currently selected Sophon instance.
+ *
+ * Must be `undefined` only when there is nothing providing the context.
  */
 export const SophonInstanceContext = React.createContext<SophonInstanceContextData | undefined>(undefined)
diff --git a/frontend/src/components/instance/SophonInstanceFooter.tsx b/frontend/src/components/instance/SophonInstanceFooter.tsx
deleted file mode 100644
index 4bb5186..0000000
--- a/frontend/src/components/instance/SophonInstanceFooter.tsx
+++ /dev/null
@@ -1,40 +0,0 @@
-import * as React from "react"
-import {Anchor, Footer} from "@steffo/bluelib-react";
-import {useSophonInstance} from "./useSophonInstance";
-
-
-const FOOTER_COLORS = {
-    development: "color-yellow",
-    test: "color-cyan",
-    production: "",
-}
-
-const SOPHON_REPO_URL = "https://github.com/Steffo99/sophon"
-const FRONTEND_REPO_URL = "https://github.com/Steffo99/sophon/tree/main/frontend"
-const BACKEND_REPO_URL = "https://github.com/Steffo99/sophon/tree/main/backend"
-const LICENSE_URL = "https://github.com/Steffo99/sophon/blob/main/LICENSE.txt"
-
-
-export function SophonInstanceFooter(): JSX.Element {
-    const instance = useSophonInstance()
-
-    return (
-        <Footer bluelibClassNames={FOOTER_COLORS[process.env.NODE_ENV]}>
-            <Anchor href={SOPHON_REPO_URL}>
-                Sophon
-            </Anchor>
-            &nbsp;|&nbsp;
-            <Anchor href={FRONTEND_REPO_URL}>
-                Frontend {process.env.NODE_ENV === "development" ? "Dev" : process.env.NODE_ENV === "test" ? "Test" : process.env.REACT_APP_VERSION}
-            </Anchor>
-            &nbsp;|&nbsp;
-            <Anchor href={BACKEND_REPO_URL}>
-                Backend {instance?.version ?? "not connected"}
-            </Anchor>
-            &nbsp;|&nbsp;
-            <Anchor href={LICENSE_URL}>
-                AGPL 3.0+
-            </Anchor>
-        </Footer>
-    )
-}
diff --git a/frontend/src/components/instance/SophonInstancePickerBox.tsx b/frontend/src/components/instance/SophonInstanceFormBox.tsx
similarity index 73%
rename from frontend/src/components/instance/SophonInstancePickerBox.tsx
rename to frontend/src/components/instance/SophonInstanceFormBox.tsx
index d1028ce..e666cee 100644
--- a/frontend/src/components/instance/SophonInstancePickerBox.tsx
+++ b/frontend/src/components/instance/SophonInstanceFormBox.tsx
@@ -2,17 +2,21 @@ import * as React from "react"
 import {Box, Form, Heading, useFormState} from "@steffo/bluelib-react";
 import Axios from "axios-lab"
 import {CHECK_TIMEOUT_MS} from "../../constants";
-import {SophonInstanceDetails} from "../../utils/SophonTypes";
+import {SophonInstanceDetails} from "../../types/SophonTypes";
 import {Validator} from "@steffo/bluelib-react/dist/types";
 import {useSophonInstance} from "./useSophonInstance";
+import {navigate} from "@reach/router";
+import {InstanceEncoder} from "../../utils/InstanceEncoder";
 
 
 /**
  * {@link Box} which allows the user to input the Sophon instance to use, altering the {@link SophonInstanceState} in the process.
  *
+ * Additionally displays a button to proceed
+ *
  * @constructor
  */
-export function SophonInstancePickerBox(): JSX.Element {
+export function SophonInstanceFormBox(): JSX.Element {
     const instance = useSophonInstance()
 
     const onValidate =
@@ -39,7 +43,7 @@ export function SophonInstancePickerBox(): JSX.Element {
                 if (signal.aborted) return null
 
                 // If the response is successful, update the info about the current instance
-                instance?.setDetails?.({...response.data, url})
+                instance.setDetails({...response.data, url})
 
                 // Success!
                 return true
@@ -47,8 +51,19 @@ export function SophonInstancePickerBox(): JSX.Element {
             [instance]
         )
 
+    const onContinue =
+        React.useCallback(
+            () => {
+                if (!instance.url) return undefined
+                const url = InstanceEncoder.encode(instance.url)
+                // noinspection JSIgnoredPromiseFromCall
+                navigate(`/i/${url}/`)
+            },
+            [instance]
+        )
+
     const urlField =
-        useFormState<string>("", onValidate)
+        useFormState<string>(instance.url?.toString() ?? "", onValidate)
 
     return (
         <Box>
@@ -61,7 +76,7 @@ export function SophonInstancePickerBox(): JSX.Element {
             <Form>
                 <Form.Field label={"URL"} {...urlField}/>
                 <Form.Row>
-                    <Form.Button disabled={!urlField.validity}>
+                    <Form.Button disabled={!urlField.validity} onClick={onContinue}>
                         Continue to login
                     </Form.Button>
                 </Form.Row>
diff --git a/frontend/src/components/instance/SophonInstanceHeading.tsx b/frontend/src/components/instance/SophonInstanceHeading.tsx
deleted file mode 100644
index 9bfa4bb..0000000
--- a/frontend/src/components/instance/SophonInstanceHeading.tsx
+++ /dev/null
@@ -1,26 +0,0 @@
-import * as React from "react"
-import {HeadingProps} from "@steffo/bluelib-react/dist/components/common/Heading";
-import {Heading} from "@steffo/bluelib-react";
-import {useSophonInstance} from "./useSophonInstance";
-
-
-interface SophonInstanceHeadingProps extends HeadingProps {
-}
-
-
-/**
- * Component which renders a {@link Heading} with the name of the current instance.
- *
- * Defaults to `"Sophon"` if no instance is set.
- *
- * @constructor
- */
-export function SophonInstanceHeading({...props}: SophonInstanceHeadingProps): JSX.Element {
-    const instance = useSophonInstance()
-
-    return (
-        <Heading {...props}>
-            {instance?.name ?? "Sophon"}
-        </Heading>
-    )
-}
diff --git a/frontend/src/components/instance/SophonInstancePage.tsx b/frontend/src/components/instance/SophonInstancePage.tsx
new file mode 100644
index 0000000..44b68bd
--- /dev/null
+++ b/frontend/src/components/instance/SophonInstancePage.tsx
@@ -0,0 +1,34 @@
+import * as React from "react"
+import {Box, Chapter, Heading} from "@steffo/bluelib-react";
+import {SophonInstanceFormBox} from "./SophonInstanceFormBox";
+import {UnselectedRouteProps} from "../routing/ResourceRouter";
+
+
+/**
+ * Props of the {@link SophonInstancePage}.
+ */
+export interface SophonInstanceContainerProps extends UnselectedRouteProps {
+}
+
+
+/**
+ * Page displayed by the {@link SophonInstanceRouter} whenever no instance is selected, providing them some information about Sophon to the user and allowing
+ * them to select an instance and proceed to login.
+ *
+ * @constructor
+ */
+export function SophonInstancePage({}: SophonInstanceContainerProps): JSX.Element {
+    return (
+        <Chapter>
+            <Box>
+                <Heading level={3}>
+                    What is Sophon?
+                </Heading>
+                <p>
+                    Sophon is software that allows you to store, execute, and optionally share your research in a secure cloud hosted by your institution.
+                </p>
+            </Box>
+            <SophonInstanceFormBox/>
+        </Chapter>
+    )
+}
diff --git a/frontend/src/components/instance/SophonInstancePageTitle.tsx b/frontend/src/components/instance/SophonInstancePageTitle.tsx
deleted file mode 100644
index fda85dc..0000000
--- a/frontend/src/components/instance/SophonInstancePageTitle.tsx
+++ /dev/null
@@ -1,25 +0,0 @@
-import * as React from "react"
-import {useSophonInstance} from "./useSophonInstance";
-
-
-/**
- * Component which changes the {@link document.title} to the name of the current Sophon instance.
- *
- * Defaults to `Sophon` if the instance is undefined.
- *
- * Does not render anything, it just contains an effect.
- *
- * @constructor
- */
-export function SophonInstancePageTitle(): null {
-    const instance = useSophonInstance()
-
-    React.useEffect(
-        () => {
-            document.title = instance?.name ?? "Sophon"
-        },
-        [instance]
-    )
-
-    return null
-}
diff --git a/frontend/src/components/instance/SophonInstanceProvider.tsx b/frontend/src/components/instance/SophonInstanceProvider.tsx
index 0a2ea1a..916ed54 100644
--- a/frontend/src/components/instance/SophonInstanceProvider.tsx
+++ b/frontend/src/components/instance/SophonInstanceProvider.tsx
@@ -1,19 +1,27 @@
 import * as React from "react"
 import {useState} from "react"
 import {SophonInstanceContext} from "./SophonInstanceContext";
-import {SophonInstanceProviderProps, SophonInstanceState} from "./Interfaces";
+import {SophonInstanceState} from "./SophonInstanceState";
 
 
 /**
- * Component which provides the {@link SophonInstanceContext} to its children.
+ * Props of the {@link SophonInstanceProvider}.
+ */
+export interface SophonInstanceProviderProps {
+    children: React.ReactNode,
+}
+
+
+/**
+ * Component which provides the {@link SophonInstanceContext} to its children, storing the current {@link SophonInstanceState} in its state.
  *
  * @constructor
  */
 export function SophonInstanceProvider({children}: SophonInstanceProviderProps): JSX.Element {
-    const [details, setDetails] = useState<SophonInstanceState | undefined>(undefined)
+    const [details, setDetails] = useState<SophonInstanceState>({})
 
     return (
-        <SophonInstanceContext.Provider value={details ? {...details, setDetails} : undefined}>
+        <SophonInstanceContext.Provider value={{...details, setDetails}}>
             {children}
         </SophonInstanceContext.Provider>
     )
diff --git a/frontend/src/components/instance/SophonInstanceRouter.tsx b/frontend/src/components/instance/SophonInstanceRouter.tsx
new file mode 100644
index 0000000..4dec556
--- /dev/null
+++ b/frontend/src/components/instance/SophonInstanceRouter.tsx
@@ -0,0 +1,32 @@
+import * as React from "react"
+import {useSophonInstance} from "./useSophonInstance";
+import {useAsDocumentTitle} from "../../hooks/useAsDocumentTitle";
+import {ResourceRouter, ResourceRouterProps} from "../routing/ResourceRouter";
+import {useSophonPath} from "../../hooks/useSophonPath";
+import {useSophonInstanceLoader} from "./useSophonInstanceLoader";
+
+
+/**
+ * {@link ResourceRouter} which uses the instance received from {@link useSophonPath} as selection.
+ *
+ * Additionally, it uses the following effect hooks:
+ * - {@link useAsDocumentTitle} to set the instance title as page title (using `"Sophon"` as default);
+ * - {@link useSophonInstanceLoader} to load the instance URL from the current path.
+ *
+ * @param props - The props to pass to the {@link ResourceRouter}. `selection` will be ignored, as it will be provided by this component.
+ * @constructor
+ */
+export function SophonInstanceRouter(props: ResourceRouterProps<string>): JSX.Element {
+    const path = useSophonPath()
+    const instance = useSophonInstance()
+
+    useAsDocumentTitle(instance.name ?? "Sophon")
+    useSophonInstanceLoader()
+
+    return (
+        <ResourceRouter
+            {...props}
+            selection={path.instance}
+        />
+    )
+}
diff --git a/frontend/src/components/instance/Interfaces.ts b/frontend/src/components/instance/SophonInstanceState.ts
similarity index 53%
rename from frontend/src/components/instance/Interfaces.ts
rename to frontend/src/components/instance/SophonInstanceState.ts
index b62ee30..ae3ef42 100644
--- a/frontend/src/components/instance/Interfaces.ts
+++ b/frontend/src/components/instance/SophonInstanceState.ts
@@ -1,4 +1,4 @@
-import {SophonInstanceDetails} from "../../utils/SophonTypes";
+import {SophonInstanceDetails} from "../../types/SophonTypes";
 import * as React from "react";
 
 // This file exists to avoid circular imports.
@@ -6,8 +6,8 @@ import * as React from "react";
 /**
  * Interface that adds the current instance URL to the {@link SophonInstanceDetails} returned by the Sophon backend.
  */
-export interface SophonInstanceState extends SophonInstanceDetails {
-    url: URL,
+export interface SophonInstanceState extends Partial<SophonInstanceDetails> {
+    url?: URL,
 }
 
 
@@ -15,13 +15,5 @@ export interface SophonInstanceState extends SophonInstanceDetails {
  * Interface for the {@link SophonInstanceContext} context that provides a way for consumers to alter the {@link SophonInstanceState}.
  */
 export interface SophonInstanceContextData extends SophonInstanceState {
-    setDetails?: React.Dispatch<React.SetStateAction<SophonInstanceState | undefined>>
+    setDetails: React.Dispatch<React.SetStateAction<SophonInstanceState>>
 }
-
-
-/**
- * Props of the {@link SophonInstanceProvider}.
- */
-export interface SophonInstanceProviderProps {
-    children: React.ReactNode,
-}
\ No newline at end of file
diff --git a/frontend/src/components/instance/index.ts b/frontend/src/components/instance/index.ts
index 8cc59e7..cc07ff2 100644
--- a/frontend/src/components/instance/index.ts
+++ b/frontend/src/components/instance/index.ts
@@ -1,9 +1,10 @@
-export {SophonInstanceBluelib as Bluelib} from "./SophonInstanceBluelib";
+export {ThemedBluelib as Bluelib} from "../theme/ThemedBluelib";
 export {SophonInstanceContext as Context} from "./SophonInstanceContext";
-export {SophonInstanceFooter as Footer} from "./SophonInstanceFooter";
-export {SophonInstanceHeading as Heading} from "./SophonInstanceHeading";
-export {SophonInstancePageTitle as PageTitle} from "./SophonInstancePageTitle";
-export {SophonInstancePickerBox as PickerBox} from "./SophonInstancePickerBox";
+export {SophonFooter as Footer} from "../elements/SophonFooter";
+export {ThemedTitle as Heading} from "../theme/ThemedTitle";
+export {SophonInstanceFormBox as FormBox} from "./SophonInstanceFormBox";
 export {SophonInstanceProvider as Provider} from "./SophonInstanceProvider";
+export {SophonInstanceRouter as Router} from "./SophonInstanceRouter";
 export {useSophonInstance as use} from "./useSophonInstance";
 export {useSophonAxios as useAxios} from "./useSophonAxios";
+export {useSophonInstanceLoader as useInstanceLoader} from "./useSophonInstanceLoader";
diff --git a/frontend/src/components/instance/useSophonAxios.ts b/frontend/src/components/instance/useSophonAxios.ts
index 8b7d5f8..a60a61b 100644
--- a/frontend/src/components/instance/useSophonAxios.ts
+++ b/frontend/src/components/instance/useSophonAxios.ts
@@ -1,6 +1,7 @@
 import * as React from "react";
 import Axios, {AxiosInstance, AxiosRequestConfig} from "axios-lab";
 import {useSophonInstance} from "./useSophonInstance";
+import {EMPTY_OBJECT} from "../../constants";
 
 
 /**
@@ -8,18 +9,18 @@ import {useSophonInstance} from "./useSophonInstance";
  *
  * @param config - Additional config option to set on the AxiosInstance.
  */
-export function useSophonAxios(config: AxiosRequestConfig = {}): AxiosInstance | undefined {
+export function useSophonAxios(config: AxiosRequestConfig = EMPTY_OBJECT): AxiosInstance | undefined {
     const instance = useSophonInstance()
 
     return React.useMemo(
         () => {
-            if (!instance) return undefined
+            if (!instance.url) return undefined
 
             return Axios.create({
                 ...config,
                 baseURL: instance.url.toString(),
             })
         },
-        [instance]
+        [instance, config]
     )
 }
diff --git a/frontend/src/components/instance/useSophonInstance.ts b/frontend/src/components/instance/useSophonInstance.ts
index fe8240e..6e9452c 100644
--- a/frontend/src/components/instance/useSophonInstance.ts
+++ b/frontend/src/components/instance/useSophonInstance.ts
@@ -1,11 +1,11 @@
-import * as React from "react";
 import {SophonInstanceContext} from "./SophonInstanceContext";
-import {SophonInstanceContextData} from "./Interfaces";
+import {SophonInstanceContextData} from "./SophonInstanceState";
+import {useDefinedContext} from "../../hooks/useDefinedContext";
 
 
 /**
- * Shortcut for {@link useContext} on {@link SophonInstanceContext}.
+ * Shortcut for {@link useDefinedContext} on {@link SophonInstanceContext}.
  */
-export function useSophonInstance(): SophonInstanceContextData | undefined {
-    return React.useContext(SophonInstanceContext)
+export function useSophonInstance(): SophonInstanceContextData {
+    return useDefinedContext<SophonInstanceContextData>(SophonInstanceContext, "useSophonInstance")
 }
diff --git a/frontend/src/components/instance/useSophonInstanceLoader.ts b/frontend/src/components/instance/useSophonInstanceLoader.ts
new file mode 100644
index 0000000..bfe96ff
--- /dev/null
+++ b/frontend/src/components/instance/useSophonInstanceLoader.ts
@@ -0,0 +1,47 @@
+import {useSophonPath} from "../../hooks/useSophonPath";
+import {useSophonInstance} from "./useSophonInstance";
+import * as React from "react";
+import {InstanceEncoder} from "../../utils/InstanceEncoder";
+import {useAbortEffect} from "../../hooks/useAbortEffect";
+import Axios, {AxiosResponse} from "axios-lab";
+import {SophonInstanceDetails} from "../../types/SophonTypes";
+
+
+/**
+ * Hook which fetches the {@link SophonInstanceDetails} from the instance specified in the URL and sets it in the {@link SophonInstanceContext}.
+ */
+export function useSophonInstanceLoader() {
+    const path = useSophonPath()
+    const instance = useSophonInstance()
+
+    useAbortEffect(
+        React.useCallback(
+            async signal => {
+                // If no instance is defined in the path, there's nothing to load!
+                if (!path.instance) return
+
+                // Decode the url from the path
+                const url = InstanceEncoder.decode(path.instance)
+
+                // If the current URL matches the instance URL, there's nothing to load!
+                if (url.toString() == instance.url?.toString()) return
+
+                // Try to get the instance data from the backend
+                let response: AxiosResponse<SophonInstanceDetails>
+                try {
+                    response = await Axios.get<SophonInstanceDetails>("/api/core/instance", {baseURL: url.toString(), signal})
+                } catch (e) {
+                    if (signal.aborted) {
+                        return
+                    } else {
+                        throw e
+                    }
+                }
+
+                // If the response is successful, update the info about the current instance
+                instance.setDetails({...response.data, url})
+            },
+            [instance, path]
+        )
+    )
+}
\ No newline at end of file
diff --git a/frontend/src/components/login/LoginContainer.tsx b/frontend/src/components/login/LoginContainer.tsx
new file mode 100644
index 0000000..f016c64
--- /dev/null
+++ b/frontend/src/components/login/LoginContainer.tsx
@@ -0,0 +1,25 @@
+import * as React from "react"
+import {LoginProvider} from "./LoginProvider";
+import {LoginRouter} from "./LoginRouter";
+import {EMPTY_OBJECT} from "../../constants";
+import {DebugBox} from "../placeholder/DebugBox";
+import {LoginPage} from "./LoginPage";
+
+
+export interface LoginContainerProps {
+
+}
+
+
+export function LoginContainer({}: LoginContainerProps): JSX.Element {
+    return (
+        <LoginProvider>
+            <LoginRouter
+                unselectedRoute={LoginPage}
+                unselectedProps={EMPTY_OBJECT}
+                selectedRoute={DebugBox}
+                selectedProps={EMPTY_OBJECT}
+            />
+        </LoginProvider>
+    )
+}
diff --git a/frontend/src/components/login/LoginContext.tsx b/frontend/src/components/login/LoginContext.tsx
new file mode 100644
index 0000000..e64f2e9
--- /dev/null
+++ b/frontend/src/components/login/LoginContext.tsx
@@ -0,0 +1,8 @@
+import * as React from "react"
+import {LoginContextData} from "./LoginState";
+
+
+/**
+ * The context that contains all the data about the currently logged in user.
+ */
+export const LoginContext = React.createContext<LoginContextData | undefined>(undefined)
diff --git a/frontend/src/components/login/LoginFormBox.tsx b/frontend/src/components/login/LoginFormBox.tsx
new file mode 100644
index 0000000..9fcfe48
--- /dev/null
+++ b/frontend/src/components/login/LoginFormBox.tsx
@@ -0,0 +1,97 @@
+import * as React from "react"
+import {useState} from "react"
+import {useSophonAxios} from "../instance/useSophonAxios";
+import {Box, Form, Heading, useFormState} from "@steffo/bluelib-react"
+import {useLogin} from "./useLogin";
+import {DjangoUser, LoginResponse} from "../../types/DjangoTypes";
+import {ErrorBox} from "../errors/ErrorBox";
+import {Loading} from "../elements/Loading";
+
+
+export interface LoginFormBoxProps {
+
+}
+
+
+export function LoginFormBox({}: LoginFormBoxProps): JSX.Element {
+    const axios = useSophonAxios()
+    const login = useLogin()
+
+    const [running, setRunning] = useState<boolean>(false)
+    const [error, setError] = useState<Error | undefined>(undefined)
+
+    const username = useFormState<string>("", () => undefined)
+    const password = useFormState<string>("", () => undefined)
+
+    const canLogin =
+        React.useMemo<boolean>(
+            () => (axios !== undefined && !running),
+            [axios, running]
+        )
+
+    const doLogin =
+        React.useCallback(
+            async () => {
+                if (!axios) return
+
+                setRunning(true)
+                setError(undefined)
+                try {
+                    const auth = await axios.post<LoginResponse>("/api/auth/token/", {username: username.value, password: password.value})
+                    const data = await axios.get<DjangoUser>(`/api/core/users/${username.value}/`)
+                    login.dispatch({
+                        type: "login",
+                        user: data.data,
+                        token: auth.data.token,
+                    })
+                } catch (e) {
+                    setError(e as Error)
+                } finally {
+                    setRunning(false)
+                }
+            },
+            [axios, login]
+        )
+
+    const messagePanel =
+        React.useMemo<JSX.Element | null>(
+            () => {
+                if (error) {
+                    return <ErrorBox error={error}/>
+                }
+                if (running) {
+                    return <Box bluelibClassNames={"color-yellow"}><Loading text={"Logging in..."}/></Box>
+                }
+                return (
+                    <Box>Press the login button after inserting your credentials.</Box>
+                )
+            },
+            [error]
+        )
+
+    return (
+        <Box>
+            <Heading level={3}>
+                Login
+            </Heading>
+            <p>
+                To use most features of Sophon, an account is required.
+            </p>
+            <p>
+                If you do not have one, you can ask your system administrator to create one for you.
+            </p>
+            <Form>
+                <Form.Row>
+                    {messagePanel}
+                </Form.Row>
+                <Form.Field label={"Username"} {...username}/>
+                <Form.Field label={"Password"} type={"password"} {...password}/>
+                <Form.Row>
+                    <Form.Button type={"submit"} disabled={!canLogin} onClick={doLogin}>
+                        Login
+                    </Form.Button>
+                </Form.Row>
+            </Form>
+        </Box>
+    )
+}
diff --git a/frontend/src/components/login/LoginGuestBox.tsx b/frontend/src/components/login/LoginGuestBox.tsx
new file mode 100644
index 0000000..1fb200f
--- /dev/null
+++ b/frontend/src/components/login/LoginGuestBox.tsx
@@ -0,0 +1,18 @@
+import * as React from "react"
+import {Box, Heading} from "@steffo/bluelib-react"
+
+
+export interface LoginGuestBoxProps {
+
+}
+
+
+export function LoginGuestBox({}: LoginGuestBoxProps): JSX.Element {
+    return (
+        <Box todo={true}>
+            <Heading level={3}>
+                Browse as guest
+            </Heading>
+        </Box>
+    )
+}
diff --git a/frontend/src/components/login/LoginPage.tsx b/frontend/src/components/login/LoginPage.tsx
new file mode 100644
index 0000000..a994a22
--- /dev/null
+++ b/frontend/src/components/login/LoginPage.tsx
@@ -0,0 +1,19 @@
+import * as React from "react"
+import {Chapter} from "@steffo/bluelib-react";
+import {LoginFormBox} from "./LoginFormBox";
+import {LoginGuestBox} from "./LoginGuestBox";
+
+
+export interface LoginPageProps {
+
+}
+
+
+export function LoginPage({}: LoginPageProps): JSX.Element {
+    return (
+        <Chapter>
+            <LoginGuestBox/>
+            <LoginFormBox/>
+        </Chapter>
+    )
+}
diff --git a/frontend/src/components/login/LoginProvider.tsx b/frontend/src/components/login/LoginProvider.tsx
new file mode 100644
index 0000000..28db573
--- /dev/null
+++ b/frontend/src/components/login/LoginProvider.tsx
@@ -0,0 +1,28 @@
+import * as React from "react"
+import {LoginContext} from "./LoginContext";
+import {loginStateReducer} from "./LoginState";
+
+
+export interface LoginProviderProps {
+    children: React.ReactNode,
+}
+
+
+export function LoginProvider({children}: LoginProviderProps): JSX.Element {
+    const [state, dispatch] = React.useReducer(loginStateReducer, {
+        user: undefined,
+        token: undefined,
+        selected: false,
+    })
+
+    return (
+        <LoginContext.Provider
+            value={{
+                ...state,
+                dispatch,
+            }}
+        >
+            {children}
+        </LoginContext.Provider>
+    )
+}
diff --git a/frontend/src/components/login/LoginRouter.tsx b/frontend/src/components/login/LoginRouter.tsx
new file mode 100644
index 0000000..ab7a16c
--- /dev/null
+++ b/frontend/src/components/login/LoginRouter.tsx
@@ -0,0 +1,21 @@
+import * as React from "react"
+import {ResourceRouter, ResourceRouterProps} from "../routing/ResourceRouter";
+import {useLogin} from "./useLogin";
+import {DjangoUser} from "../../types/DjangoTypes";
+
+
+export interface LoginRouterProps extends ResourceRouterProps<DjangoUser | "guest"> {
+
+}
+
+
+export function LoginRouter({...props}: LoginRouterProps): JSX.Element {
+    const login = useLogin()
+
+    return (
+        <ResourceRouter
+            {...props}
+            selection={login.selected ? (login.user ? login.user : "guest") : undefined}
+        />
+    )
+}
diff --git a/frontend/src/components/login/LoginState.ts b/frontend/src/components/login/LoginState.ts
new file mode 100644
index 0000000..f0873ad
--- /dev/null
+++ b/frontend/src/components/login/LoginState.ts
@@ -0,0 +1,62 @@
+import {DjangoUser} from "../../types/DjangoTypes";
+import React from "react";
+
+
+/**
+ * The state of the {@link LoginContext}.
+ */
+export interface LoginState {
+    user?: DjangoUser,
+    token?: string,
+    selected: boolean
+}
+
+
+export interface LoginAction {
+    type: "login",
+    user: DjangoUser,
+    token: string,
+}
+
+export interface LogoutAction {
+    type: "logout",
+}
+
+export interface BrowseAction {
+    type: "browse",
+}
+
+
+export type LoginDispatch = LoginAction | LogoutAction | BrowseAction
+
+
+export function loginStateReducer(prev: LoginState, action: LoginDispatch): LoginState {
+    switch (action.type) {
+        case "login":
+            return {
+                user: action.user,
+                token: action.token,
+                selected: true,
+            }
+        case "logout":
+            return {
+                user: undefined,
+                token: undefined,
+                selected: false,
+            }
+        case "browse":
+            return {
+                user: undefined,
+                token: undefined,
+                selected: true,
+            }
+    }
+}
+
+
+/**
+ * Interface for the {@link LoginContext} context that provides a way for consumers to alter the `user` and `token`.
+ */
+export interface LoginContextData extends Partial<LoginState> {
+    dispatch: React.Dispatch<LoginDispatch>
+}
diff --git a/frontend/src/components/login/useLogin.ts b/frontend/src/components/login/useLogin.ts
new file mode 100644
index 0000000..2669954
--- /dev/null
+++ b/frontend/src/components/login/useLogin.ts
@@ -0,0 +1,7 @@
+import {LoginContext} from "./LoginContext";
+import {useDefinedContext} from "../../hooks/useDefinedContext";
+
+
+export function useLogin() {
+    return useDefinedContext(LoginContext, "LoginContext")
+}
\ No newline at end of file
diff --git a/frontend/src/components/login/useLoginAxios.ts b/frontend/src/components/login/useLoginAxios.ts
new file mode 100644
index 0000000..90e452b
--- /dev/null
+++ b/frontend/src/components/login/useLoginAxios.ts
@@ -0,0 +1,15 @@
+import {useSophonAxios} from "../instance/useSophonAxios";
+import {useLogin} from "./useLogin";
+import {AxiosRequestConfig} from "axios-lab";
+
+export function useLoginAxios(config: AxiosRequestConfig = {}) {
+    const login = useLogin()
+
+    return useSophonAxios({
+        ...config,
+        headers: {
+            ...config.headers,
+            "Authorization": login.token ? `Bearer ${login.token}` : undefined
+        }
+    })
+}
\ No newline at end of file
diff --git a/frontend/src/components/placeholder/DebugBox.tsx b/frontend/src/components/placeholder/DebugBox.tsx
new file mode 100644
index 0000000..cdfd496
--- /dev/null
+++ b/frontend/src/components/placeholder/DebugBox.tsx
@@ -0,0 +1,20 @@
+import * as React from "react"
+import {Box, Code} from "@steffo/bluelib-react";
+
+
+export interface DebugBoxProps {
+    [key: string]: any,
+}
+
+
+export function DebugBox(props: DebugBoxProps): JSX.Element {
+    return (
+        <Box todo={true}>
+            <Code>
+                <pre>
+                    {JSON.stringify(props, undefined, 4)}
+                </pre>
+            </Code>
+        </Box>
+    )
+}
diff --git a/frontend/src/components/routing/LocationViewSetRouter.tsx b/frontend/src/components/routing/LocationViewSetRouter.tsx
index 4442922..1882b87 100644
--- a/frontend/src/components/routing/LocationViewSetRouter.tsx
+++ b/frontend/src/components/routing/LocationViewSetRouter.tsx
@@ -1,24 +1,29 @@
 import * as React from "react"
 import {ViewSetRouter, ViewSetRouterProps} from "./ViewSetRouter";
 import {useLocation} from "@reach/router";
-import {SplitPath, splitPath} from "../../utils/PathSplitter";
-import {Detail} from "../../utils/DjangoTypes";
+import {ParsedPath, parsePath} from "../../utils/ParsePath";
+import {DjangoResource} from "../../types/DjangoTypes";
 
 
-interface LocationViewSetRouterProps<Resource extends Detail> extends ViewSetRouterProps<Resource> {
+interface LocationViewSetRouterProps<Resource extends DjangoResource> extends ViewSetRouterProps<Resource> {
     pkKey: keyof Resource,
-    splitPathKey: keyof SplitPath,
+    splitPathKey: keyof ParsedPath,
 }
 
 
-export function LocationViewSetRouter<Resource extends Detail>({pkKey, splitPathKey, viewSet, ...props}: LocationViewSetRouterProps<Resource>): JSX.Element {
+export function LocationViewSetRouter<Resource extends DjangoResource>({
+                                                                           pkKey,
+                                                                           splitPathKey,
+                                                                           viewSet,
+                                                                           ...props
+                                                                       }: LocationViewSetRouterProps<Resource>): JSX.Element {
     // Get the current page location
     const location = useLocation()
 
     // Split the path into multiple segments
     const expectedPk =
         React.useMemo(
-            () => splitPath(location.pathname)[splitPathKey],
+            () => parsePath(location.pathname)[splitPathKey],
             [location]
         )
 
diff --git a/frontend/src/components/routing/ResourceRouter.tsx b/frontend/src/components/routing/ResourceRouter.tsx
new file mode 100644
index 0000000..3f58ce6
--- /dev/null
+++ b/frontend/src/components/routing/ResourceRouter.tsx
@@ -0,0 +1,52 @@
+import * as React from "react"
+
+/**
+ * The props that are passed by default to all unselected routes.
+ */
+export type UnselectedRouteProps = {}
+
+
+/**
+ * The props that are passed by default to all selected routes.
+ */
+export type SelectedRouteProps<Type> = {
+    selection: Type,
+}
+
+
+/**
+ * The props of the {@link ResourceRouter}.
+ */
+export interface ResourceRouterProps<Type, UnselectedProps extends {} = {}, SelectedProps extends {} = {}> {
+    selection?: Type,
+
+    unselectedRoute: (props: UnselectedRouteProps & UnselectedProps) => JSX.Element | null,
+    unselectedProps: UnselectedProps,
+    selectedRoute: (props: SelectedRouteProps<Type> & SelectedProps) => JSX.Element | null,
+    selectedProps: SelectedProps,
+}
+
+/**
+ * A component which chooses between two sub-components:
+ * - If {@link selection} is nullish, it renders {@link unselectedRoute} with {@link unselectedProps} plus the {@link UnselectedRouteProps}.
+ * - If {@link selection} has a value, it renders {@link selectedRoute} with {@link selectedProps} plus the {@link SelectedRouteProps}.
+ *
+ * @constructor
+ */
+export function ResourceRouter<Type, UnselectedProps, SelectedProps>({
+                                                                         selection,
+                                                                         unselectedRoute: UnselectedRoute,
+                                                                         unselectedProps,
+                                                                         selectedRoute: SelectedRoute,
+                                                                         selectedProps
+                                                                     }: ResourceRouterProps<Type, UnselectedProps, SelectedProps>): JSX.Element {
+    if (selection) {
+        return (
+            <SelectedRoute {...selectedProps} selection={selection}/>
+        )
+    } else {
+        return (
+            <UnselectedRoute {...unselectedProps}/>
+        )
+    }
+}
diff --git a/frontend/src/components/routing/ViewSetRouter.tsx b/frontend/src/components/routing/ViewSetRouter.tsx
index 15be1f6..f74be1c 100644
--- a/frontend/src/components/routing/ViewSetRouter.tsx
+++ b/frontend/src/components/routing/ViewSetRouter.tsx
@@ -1,9 +1,9 @@
 import * as React from "react"
-import * as ReactDOM from "react-dom"
 import {ManagedResource, ManagedViewSet} from "../../hooks/useManagedViewSet";
 import {ErrorBox} from "../errors/ErrorBox";
 import {Box} from "@steffo/bluelib-react";
 import {Loading} from "../elements/Loading";
+import {ResourceRouter, ResourceRouterProps} from "./ResourceRouter";
 
 
 export interface ListRouteProps<Resource> {
@@ -12,29 +12,25 @@ export interface ListRouteProps<Resource> {
 
 
 export interface DetailsRouteProps<Resource> {
-    selection: ManagedResource<Resource>,
+
 }
 
 
-export interface ViewSetRouterProps<Resource> {
+export interface ViewSetRouterProps<Resource> extends ResourceRouterProps<ManagedResource<Resource>, ListRouteProps<Resource>, DetailsRouteProps<Resource>> {
     viewSet: ManagedViewSet<Resource>,
-    selection?: ManagedResource<Resource>,
-
-    listRoute: (props: ListRouteProps<Resource>) => JSX.Element | null,
-    detailsRoute: (props: DetailsRouteProps<Resource>) => JSX.Element | null,
 }
 
 
-export function ViewSetRouter<Resource>({viewSet, selection, listRoute: ListRoute, detailsRoute: DetailsRoute}: ViewSetRouterProps<Resource>): JSX.Element {
-    // If an error happens in the viewset, display it
-    if(viewSet.error) {
+export function ViewSetRouter<Resource>({viewSet, ...props}: ViewSetRouterProps<Resource>): JSX.Element {
+    // If an error happens, display it in a ErrorBox
+    if (viewSet.error) {
         return (
             <ErrorBox error={viewSet.error}/>
         )
     }
 
     // If the viewset is loading, display a loading message
-    if(viewSet.resources === null) {
+    if (viewSet.resources === null) {
         return (
             <Box>
                 <Loading/>
@@ -42,15 +38,10 @@ export function ViewSetRouter<Resource>({viewSet, selection, listRoute: ListRout
         )
     }
 
-    // Branch: if a resource has been selected, display it, otherwise display the resource list
-    if(selection) {
-        return (
-            <DetailsRoute selection={selection}/>
-        )
-    }
-    else {
-        return (
-            <ListRoute viewSet={viewSet}/>
-        )
-    }
+    return (
+        <ResourceRouter
+            {...props}
+            unselectedProps={{...props.unselectedProps, viewSet}}
+        />
+    )
 }
diff --git a/frontend/src/components/routing/index.ts b/frontend/src/components/routing/index.ts
new file mode 100644
index 0000000..827fcef
--- /dev/null
+++ b/frontend/src/components/routing/index.ts
@@ -0,0 +1,3 @@
+export {LocationViewSetRouter} from "./LocationViewSetRouter"
+export {ResourceRouter} from "./ResourceRouter"
+export {ViewSetRouter} from "./ViewSetRouter"
diff --git a/frontend/src/components/instance/SophonInstanceBluelib.tsx b/frontend/src/components/theme/ThemedBluelib.tsx
similarity index 50%
rename from frontend/src/components/instance/SophonInstanceBluelib.tsx
rename to frontend/src/components/theme/ThemedBluelib.tsx
index 64c575c..bf191e6 100644
--- a/frontend/src/components/instance/SophonInstanceBluelib.tsx
+++ b/frontend/src/components/theme/ThemedBluelib.tsx
@@ -1,25 +1,29 @@
 import * as React from "react"
 import {Bluelib} from "@steffo/bluelib-react";
-import {useSophonInstance} from "./useSophonInstance";
+import {useThemeContext} from "../../contexts/theme";
 
 
+/**
+ * The props of {@link ThemedBluelib}.
+ */
 export interface SophonInstanceBluelibProps {
     children: React.ReactNode,
 }
 
 
 /**
- * Component which wraps its children in a {@link Bluelib} component with a theme based on its instance.
+ * Component which wraps its children in a {@link Bluelib} component with a theme based on {@link useThemeContext}.
  *
  * Defaults to the `"sophon"` theme if no instance is set.
  *
  * @constructor
  */
-export function SophonInstanceBluelib({children}: SophonInstanceBluelibProps): JSX.Element {
-    const instance = useSophonInstance()
+export function ThemedBluelib({children}: SophonInstanceBluelibProps): JSX.Element {
+    const instance = useThemeContext()
+    const theme = instance?.state?.bluelib ?? "sophon"
 
     return (
-        <Bluelib theme={instance?.theme ?? "sophon"}>
+        <Bluelib theme={theme}>
             {children}
         </Bluelib>
     )
diff --git a/frontend/src/components/theme/ThemedTitle.tsx b/frontend/src/components/theme/ThemedTitle.tsx
new file mode 100644
index 0000000..fe3ee25
--- /dev/null
+++ b/frontend/src/components/theme/ThemedTitle.tsx
@@ -0,0 +1,24 @@
+import * as React from "react"
+import {HeadingProps} from "@steffo/bluelib-react/dist/components/common/Heading";
+import {Heading} from "@steffo/bluelib-react";
+import {useAsDocumentTitle} from "../../hooks/useAsDocumentTitle";
+import {useThemeContext} from "../../contexts/theme";
+
+
+/**
+ * Component which renders a {@link Heading} containing the title from {@link useThemeContext}, and additionally sets the document title to match.
+ *
+ * @constructor
+ */
+export function ThemedTitle(props: HeadingProps): JSX.Element {
+    const instance = useThemeContext()
+    const title = instance?.state?.title ?? "Sophon"
+
+    useAsDocumentTitle(title)
+
+    return (
+        <Heading {...props}>
+            {title}
+        </Heading>
+    )
+}
diff --git a/frontend/src/constants.ts b/frontend/src/constants.ts
index e11856c..9c91a82 100644
--- a/frontend/src/constants.ts
+++ b/frontend/src/constants.ts
@@ -1 +1,2 @@
 export const CHECK_TIMEOUT_MS = 350
+export const EMPTY_OBJECT = {}
diff --git a/frontend/src/contexts/authorization.tsx b/frontend/src/contexts/authorization.tsx
new file mode 100644
index 0000000..31a7393
--- /dev/null
+++ b/frontend/src/contexts/authorization.tsx
@@ -0,0 +1,94 @@
+import * as React from "react"
+import {ContextData} from "../types/ContextTypes";
+import {WithChildren} from "../types/ExtraTypes";
+import {SophonUser} from "../types/SophonTypes";
+
+// States
+
+type AuthorizationUnselected = {
+    token: undefined,
+    user: undefined,
+}
+
+type AuthorizationLoggedIn = {
+    token: string,
+    user: SophonUser,
+}
+
+type AuthorizationGuest = {
+    token: null,
+    user: null,
+}
+
+
+// Actions
+
+type AuthorizationClear = {
+    type: "clear",
+}
+
+type AuthorizationLogIn = {
+    type: "login",
+    token: string,
+    user: SophonUser,
+}
+
+type AuthorizationBrowse = {
+    type: "browse",
+}
+
+
+// Composition
+
+type AuthorizationState = AuthorizationUnselected | AuthorizationLoggedIn | AuthorizationGuest
+type AuthorizationAction = AuthorizationClear | AuthorizationLogIn | AuthorizationBrowse
+type AuthorizationContextData = ContextData<AuthorizationState, AuthorizationAction> | undefined
+
+
+// Definitions
+
+const authorizationDefaultState: AuthorizationState = {
+    token: undefined,
+    user: undefined,
+}
+
+const authorizationReducer: React.Reducer<AuthorizationState, AuthorizationAction> = (prevState, action) => {
+    switch (action.type) {
+        case "clear":
+            return authorizationDefaultState
+        case "browse":
+            return {
+                token: null,
+                user: null,
+            }
+        case "login":
+            return {
+                token: action.token,
+                user: action.user,
+            }
+    }
+}
+
+const authorizationContext = React.createContext<AuthorizationContextData>(undefined)
+const AuthorizationContext = authorizationContext
+
+
+// Hooks
+
+export function useAuthorizationReducer(): AuthorizationContextData {
+    const [state, dispatch] = React.useReducer(authorizationReducer, authorizationDefaultState)
+    return {state, dispatch}
+}
+
+export function useAuthorizationContext(): AuthorizationContextData {
+    return React.useContext(authorizationContext)
+}
+
+
+// Components
+
+export function AuthorizationProvider({children}: WithChildren): JSX.Element {
+    const reducer = useAuthorizationReducer()
+
+    return <AuthorizationContext.Provider value={reducer} children={children}/>
+}
\ No newline at end of file
diff --git a/frontend/src/contexts/instance.tsx b/frontend/src/contexts/instance.tsx
new file mode 100644
index 0000000..e6acc33
--- /dev/null
+++ b/frontend/src/contexts/instance.tsx
@@ -0,0 +1,83 @@
+import * as React from "react"
+import {ContextData} from "../types/ContextTypes";
+import {SophonInstanceDetails} from "../types/SophonTypes";
+import {WithChildren} from "../types/ExtraTypes";
+
+// States
+
+type InstanceNotSelected = {
+    url: undefined,
+    details: undefined,
+}
+
+type InstanceSelected = {
+    url: URL,
+    details: SophonInstanceDetails,
+}
+
+
+// Actions
+
+type InstanceSelect = {
+    type: "select",
+    url: URL,
+    details: SophonInstanceDetails,
+}
+
+type InstanceDeselect = {
+    type: "deselect",
+}
+
+
+// Composition
+
+type InstanceState = InstanceSelected | InstanceNotSelected
+type InstanceAction = InstanceSelect | InstanceDeselect
+type InstanceContextData = ContextData<InstanceState, InstanceAction> | undefined
+
+
+// Definitions
+
+const instanceDefaultState: InstanceState = {
+    url: undefined,
+    details: undefined,
+}
+
+const instanceReducer: React.Reducer<InstanceState, InstanceAction> = (prevState, action) => {
+    switch (action.type) {
+        case "select":
+            return {
+                url: action.url,
+                details: action.details,
+            }
+        case "deselect":
+            return {
+                url: undefined,
+                details: undefined,
+            }
+    }
+}
+
+const instanceContext = React.createContext<InstanceContextData>(undefined)
+const InstanceContext = instanceContext
+
+
+// Hooks
+
+export function useInstanceReducer(): InstanceContextData {
+    const [state, dispatch] = React.useReducer(instanceReducer, instanceDefaultState)
+    return {state, dispatch}
+}
+
+export function useInstanceContext(): InstanceContextData {
+    return React.useContext(instanceContext)
+}
+
+
+// Components
+
+export function InstanceProvider({children}: WithChildren): JSX.Element {
+    const reducer = useInstanceReducer()
+
+    return <InstanceContext.Provider value={reducer} children={children}/>
+}
\ No newline at end of file
diff --git a/frontend/src/contexts/theme.tsx b/frontend/src/contexts/theme.tsx
new file mode 100644
index 0000000..8f5ccbf
--- /dev/null
+++ b/frontend/src/contexts/theme.tsx
@@ -0,0 +1,74 @@
+import * as React from "react"
+import {ContextData} from "../types/ContextTypes";
+import {WithChildren} from "../types/ExtraTypes";
+
+// States
+
+type ThemeSelected = {
+    bluelib: "sophon" | "royalblue" | "hacker" | "paper",
+    title: string,
+}
+
+
+// Actions
+
+type ThemeSet = {
+    type: "set",
+    bluelib: "sophon" | "royalblue" | "hacker" | "paper",
+    title: string,
+}
+
+type ThemeReset = {
+    type: "reset",
+}
+
+
+// Composition
+
+type ThemeState = ThemeSelected
+type ThemeAction = ThemeSet | ThemeReset
+type ThemeContextData = ContextData<ThemeState, ThemeAction> | undefined
+
+
+// Definitions
+
+const themeDefaultState: ThemeState = {
+    bluelib: "sophon",
+    title: "Sophon",
+}
+
+const themeReducer: React.Reducer<ThemeState, ThemeAction> = (prevState, action) => {
+    switch (action.type) {
+        case "set":
+            return {
+                bluelib: action.bluelib,
+                title: action.title,
+            }
+        case "reset":
+            return themeDefaultState
+    }
+}
+
+const themeContext = React.createContext<ThemeContextData>(undefined)
+const ThemeContext = themeContext
+
+
+// Hooks
+
+export function useThemeReducer(): ThemeContextData {
+    const [state, dispatch] = React.useReducer(themeReducer, themeDefaultState)
+    return {state, dispatch}
+}
+
+export function useThemeContext(): ThemeContextData {
+    return React.useContext(themeContext)
+}
+
+
+// Components
+
+export function ThemeProvider({children}: WithChildren): JSX.Element {
+    const reducer = useThemeReducer()
+
+    return <ThemeContext.Provider value={reducer} children={children}/>
+}
\ No newline at end of file
diff --git a/frontend/src/hooks/useCancellable.ts b/frontend/src/hooks/useAbortEffect.ts
similarity index 100%
rename from frontend/src/hooks/useCancellable.ts
rename to frontend/src/hooks/useAbortEffect.ts
diff --git a/frontend/src/hooks/useAsDocumentTitle.ts b/frontend/src/hooks/useAsDocumentTitle.ts
new file mode 100644
index 0000000..372db7d
--- /dev/null
+++ b/frontend/src/hooks/useAsDocumentTitle.ts
@@ -0,0 +1,10 @@
+import * as React from "react";
+
+export function useAsDocumentTitle(title: string): void {
+    React.useEffect(
+        () => {
+            document.title = title
+        },
+        [title]
+    )
+}
diff --git a/frontend/src/hooks/useDefinedContext.ts b/frontend/src/hooks/useDefinedContext.ts
new file mode 100644
index 0000000..cd09548
--- /dev/null
+++ b/frontend/src/hooks/useDefinedContext.ts
@@ -0,0 +1,18 @@
+import * as React from "react";
+
+
+/**
+ * Hook that throws an error if the specified context is undefined.
+ *
+ * @param context - The context to use.
+ * @param hookName - The name of the hook to display in the thrown error.
+ */
+export function useDefinedContext<T>(context: React.Context<T | undefined>, hookName: string): T {
+    const ctx = React.useContext(context)
+
+    if (!ctx) {
+        throw new Error(`\`${hookName}\` cannot be used outside its provider.`)
+    }
+
+    return ctx
+}
diff --git a/frontend/src/hooks/useManagedViewSet.ts b/frontend/src/hooks/useManagedViewSet.ts
index 904eb1d..8462a8f 100644
--- a/frontend/src/hooks/useManagedViewSet.ts
+++ b/frontend/src/hooks/useManagedViewSet.ts
@@ -1,7 +1,7 @@
 import * as React from "react"
+import {useEffect, useMemo, useReducer} from "react"
 import {useViewSet} from "./useViewSet";
-import {useEffect, useMemo, useReducer} from "react";
-import {Detail} from "../utils/DjangoTypes";
+import {DjangoResource} from "../types/DjangoTypes";
 import {arrayExclude, arrayExtension} from "../utils/ArrayExtension";
 
 
@@ -159,7 +159,7 @@ function reducerManagedViewSet<Resource>(state: ManagedState<Resource>, action:
 }
 
 
-export function useManagedViewSet<Resource extends Detail>(baseRoute: string, pkKey: keyof Resource, refreshOnMount: boolean = true): ManagedViewSet<Resource> {
+export function useManagedViewSet<Resource extends DjangoResource>(baseRoute: string, pkKey: keyof Resource, refreshOnMount: boolean = true): ManagedViewSet<Resource> {
     const viewset =
         useViewSet<Resource>(baseRoute)
 
diff --git a/frontend/src/hooks/useNotNullContext.ts b/frontend/src/hooks/useNotNullContext.ts
deleted file mode 100644
index 50be137..0000000
--- a/frontend/src/hooks/useNotNullContext.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import * as React from "react";
-
-
-export function createNullContext<T>(): React.Context<T | null> {
-    return React.createContext<T | null>(null)
-}
-
-
-export function useNotNullContext<T>(context: React.Context<T | null>): T {
-    const ctx = React.useContext(context)
-
-    if(!ctx) {
-        throw new Error("useNotNullContext called outside its context.")
-    }
-
-    return ctx
-}
diff --git a/frontend/src/hooks/useSophonPath.ts b/frontend/src/hooks/useSophonPath.ts
new file mode 100644
index 0000000..fc29112
--- /dev/null
+++ b/frontend/src/hooks/useSophonPath.ts
@@ -0,0 +1,16 @@
+import * as React from "react"
+import {useLocation} from "@reach/router";
+import {parsePath} from "../utils/ParsePath";
+
+export function useSophonPath() {
+    const location = useLocation()
+
+    return React.useMemo(
+        () => {
+            // FIXME: Shenanigans?
+            let toParse = location.pathname.replace("%25", "%")
+            return parsePath(toParse)
+        },
+        [location]
+    )
+}
diff --git a/frontend/src/hooks/useStorageState.ts b/frontend/src/hooks/useStorageState.ts
index cdf7fe6..dc19b12 100644
--- a/frontend/src/hooks/useStorageState.ts
+++ b/frontend/src/hooks/useStorageState.ts
@@ -56,7 +56,7 @@ export function useStorageState<T>(storage: Storage, key: string, def: T): [T, R
         [storage, key],
     )
 
-    const [value, setValue] = useState(load())
+    const [value, setValue] = useState<T>(load())
 
     /**
      * Set `value` and save it to the {@link storage}.
diff --git a/frontend/src/hooks/useViewSet.ts b/frontend/src/hooks/useViewSet.ts
index c4e0054..cffa543 100644
--- a/frontend/src/hooks/useViewSet.ts
+++ b/frontend/src/hooks/useViewSet.ts
@@ -1,7 +1,8 @@
 import {AxiosRequestConfig, AxiosResponse} from "axios-lab";
 import {AxiosRequestConfigWithData, AxiosRequestConfigWithURL} from "../utils/AxiosTypesExtension";
 import * as React from "react";
-import {Page} from "../utils/DjangoTypes";
+import {DjangoPage} from "../types/DjangoTypes";
+import {useSophonAxios} from "../components/instance/useSophonAxios";
 
 
 export type ViewSetCommand<Resource>  = (config: AxiosRequestConfigWithURL)               => Promise<Resource[]>
@@ -80,15 +81,18 @@ export interface ViewSet<Resource> {
  * @param baseRoute - The path to the ViewSet with a trailing slash.
  */
 export function useViewSet<Resource>(baseRoute: string): ViewSet<Resource> {
-    const api = useLoginAxios()
+    // TODO: Replace me with a login axios
+    const api = useSophonAxios()
 
     const command: ViewSetCommand<Resource> =
         React.useCallback(
             async (config) => {
+                if (!api) throw new Error("useViewSet called while the Sophon instance was undefined.")
+
                 let nextUrl: string | null = config.url
                 let resources: Resource[] = []
-                while(nextUrl !== null) {
-                    const response: AxiosResponse<Page<Resource>> = await api.request<Page<Resource>>({...config, url: nextUrl})
+                while (nextUrl !== null) {
+                    const response: AxiosResponse<DjangoPage<Resource>> = await api.request<DjangoPage<Resource>>({...config, url: nextUrl})
                     nextUrl = response.data.next
                     resources = [...resources, ...response.data.results]
                 }
@@ -100,6 +104,8 @@ export function useViewSet<Resource>(baseRoute: string): ViewSet<Resource> {
     const action: ViewSetAction<Resource> =
         React.useCallback(
             async (config) => {
+                if (!api) throw new Error("useViewSet called while the Sophon instance was undefined.")
+
                 const response = await api.request<Resource>(config)
                 return response.data
             },
diff --git a/frontend/src/routes/LoginPage.tsx b/frontend/src/routes/LoginPage.tsx
deleted file mode 100644
index 0ba94da..0000000
--- a/frontend/src/routes/LoginPage.tsx
+++ /dev/null
@@ -1,26 +0,0 @@
-import * as React from "react"
-import {InstanceSelectBox} from "../components/legacy/login/InstanceSelectBox";
-import {Chapter} from "@steffo/bluelib-react";
-import {LoginBox} from "../components/legacy/login/LoginBox";
-import {useLogin} from "../components/legacy/login/LoginContext";
-import {LogoutBox} from "../components/legacy/login/LogoutBox";
-import {GuestBox} from "../components/legacy/login/GuestBox";
-
-
-export function LoginPage(): JSX.Element {
-    const {userData} = useLogin()
-
-    return (
-        <div>
-            <InstanceSelectBox/>
-            {userData ?
-                <LogoutBox/>
-            :
-                <Chapter>
-                    <GuestBox/>
-                    <LoginBox/>
-                </Chapter>
-            }
-        </div>
-    )
-}
diff --git a/frontend/src/routes/Router.jsx b/frontend/src/routes/Router.jsx
deleted file mode 100644
index 3b81ac1..0000000
--- a/frontend/src/routes/Router.jsx
+++ /dev/null
@@ -1,22 +0,0 @@
-import * as React from "react"
-import * as Reach from "@reach/router"
-import { LoginPage } from "./LoginPage"
-import { ErrorCatcherBox, NotFoundBox } from "../components/ErrorBox"
-import { InstanceTitle } from "../components/legacy/InstanceTitle"
-
-
-export function Router() {
-    // noinspection RequiredAttributes
-    return <>
-        <Reach.Router primary={false}>
-            <InstanceTitle default/>
-        </Reach.Router>
-        <ErrorCatcherBox>
-            <Reach.Router primary={true}>
-                <LoginPage path={"/"}/>
-                <InstancePage path={"/g/"}/>
-                <NotFoundBox default/>
-            </Reach.Router>
-        </ErrorCatcherBox>
-    </>
-}
diff --git a/frontend/src/types/ContextTypes.ts b/frontend/src/types/ContextTypes.ts
new file mode 100644
index 0000000..b571025
--- /dev/null
+++ b/frontend/src/types/ContextTypes.ts
@@ -0,0 +1,8 @@
+import * as React from "react"
+
+
+export interface ContextData<S, A> {
+    state: S,
+    dispatch: React.Dispatch<A>,
+}
+
diff --git a/frontend/src/types/DjangoTypes.ts b/frontend/src/types/DjangoTypes.ts
new file mode 100644
index 0000000..e07cf1b
--- /dev/null
+++ b/frontend/src/types/DjangoTypes.ts
@@ -0,0 +1,27 @@
+import {Dict} from "./ExtraTypes";
+
+
+/**
+ * A Django slug, an alphanumeric and possibly dashed string.
+ *
+ * @warning Currently does not perform checking.
+ */
+export type DjangoSlug = string
+
+
+/**
+ * A page of resources returned by Django Rest Framework.
+ */
+export type DjangoPage<T extends DjangoResource> = {
+    count: number,
+    next: string | null,
+    previous: string | null,
+    results: T[]
+}
+
+
+/**
+ * A single resource returned by Django Rest Framework.
+ */
+export interface DjangoResource extends Dict<any> {
+}
diff --git a/frontend/src/types/ExtraTypes.ts b/frontend/src/types/ExtraTypes.ts
new file mode 100644
index 0000000..7e8ebfe
--- /dev/null
+++ b/frontend/src/types/ExtraTypes.ts
@@ -0,0 +1,17 @@
+import * as React from "react"
+
+
+/**
+ * An object mapping string-keys to any kind of value.
+ */
+export interface Dict<T> {
+    [key: string]: T
+}
+
+
+/**
+ * Props including the children key.
+ */
+export interface WithChildren {
+    children?: React.ReactNode,
+}
diff --git a/frontend/src/types/SophonTypes.ts b/frontend/src/types/SophonTypes.ts
new file mode 100644
index 0000000..94d82ad
--- /dev/null
+++ b/frontend/src/types/SophonTypes.ts
@@ -0,0 +1,74 @@
+import {DjangoResource, DjangoSlug} from "./DjangoTypes";
+
+
+/**
+ * The response to a successful authentication token request, as returned by the `/api/auth/token/` endpoint.
+ */
+export interface SophonToken extends DjangoResource {
+    token: string,
+}
+
+
+/**
+ * A Django User, as returned by the `/api/core/users/` endpoint.
+ */
+export interface SophonUser extends DjangoResource {
+    id: number,
+    username: DjangoSlug,
+    first_name: string,
+    last_name: string,
+    email: string,
+}
+
+
+/**
+ * The details of a Sophon instance, as returned by the `/api/core/instance` endpoint.
+ */
+export interface SophonInstanceDetails extends DjangoResource {
+    name: string,
+    version: string,
+    description: string | null,
+    theme: "sophon" | "royalblue" | "hacker" | "paper",
+}
+
+
+/**
+ * A Sophon Research Group, as returned by the `/api/core/groups/` endpoint.
+ */
+export interface SophonResearchGroup extends DjangoResource {
+    owner: number,
+    members: number[],
+    name: string,
+    description: string,
+    access: "OPEN" | "MANUAL",
+    slug: DjangoSlug,
+}
+
+
+/**
+ * A Sophon Research Project, as returned by the `/api/projects/` endpoint.
+ */
+export interface SophonResearchProject extends DjangoResource {
+    visibility: "PUBLIC" | "INTERNAL" | "PRIVATE",
+    slug: DjangoSlug,
+    name: string,
+    description: string,
+    group: DjangoSlug,
+}
+
+
+/**
+ * A Sophon Notebook, as returned by the `/api/notebooks/` endpoint.
+ */
+export interface SophonNotebook extends DjangoResource {
+    locked_by: number,
+    slug: DjangoSlug,
+    legacy_notebook_url: string | null,
+    jupyter_token: string,
+    is_running: boolean,
+    internet_access: true,
+    container_image: string,
+    project: DjangoSlug,
+    name: string,
+    lab_url: string | null,
+}
diff --git a/frontend/src/types/index.ts b/frontend/src/types/index.ts
new file mode 100644
index 0000000..52a63e1
--- /dev/null
+++ b/frontend/src/types/index.ts
@@ -0,0 +1,3 @@
+export * as Extra from "./ExtraTypes"
+export * as Django from "./DjangoTypes"
+export * as Sophon from "./SophonTypes"
diff --git a/frontend/src/utils/DjangoTypes.ts b/frontend/src/utils/DjangoTypes.ts
deleted file mode 100644
index 5c3bfeb..0000000
--- a/frontend/src/utils/DjangoTypes.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-/**
- * A Django slug, an alphanumeric and possibly dashed string.
- *
- * @warn Currently does not perform checking.
- */
-export type Slug = string
-
-
-/**
- * A page of resources returned by Django Rest Framework.
- */
-export type Page<T> = {
-    count: number,
-    next: string | null,
-    previous: string | null,
-    results: T[]
-}
-
-
-export interface Detail {
-    [key: string]: any
-}
\ No newline at end of file
diff --git a/frontend/src/utils/InstanceEncoder.test.js b/frontend/src/utils/InstanceEncoder.test.js
index ae918a5..7af9dd2 100644
--- a/frontend/src/utils/InstanceEncoder.test.js
+++ b/frontend/src/utils/InstanceEncoder.test.js
@@ -1,26 +1,37 @@
-import {InstanceEncoder} from "./InstanceEncoder"
+// noinspection JSCheckFunctionSignatures
+
+import { InstanceEncoder } from "./InstanceEncoder"
+
 
 test("encodes pathless URL", () => {
     expect(
-        InstanceEncoder.encode(new URL("https://api.sophon.steffo.eu"))
-    ).toStrictEqual(
-        "https:api.sophon.steffo.eu:"
+        InstanceEncoder.encode(new URL("https://api.sophon.steffo.eu")),
+    ).toEqual(
+        "https:api.sophon.steffo.eu",
+    )
+})
+
+test("encodes URL with port number", () => {
+    expect(
+        InstanceEncoder.encode(new URL("http://localhost:30033")),
+    ).toEqual(
+        "http:localhost%3A30033",
     )
 })
 
 test("encodes URL with simple path", () => {
     expect(
-        InstanceEncoder.encode(new URL("https://steffo.eu/sophon/api/"))
-    ).toStrictEqual(
-        "https:steffo.eu:sophon:api:"
+        InstanceEncoder.encode(new URL("https://steffo.eu/sophon/api/")),
+    ).toEqual(
+        "https:steffo.eu:sophon:api:",
     )
 })
 
 test("encodes URL with colon in path", () => {
     expect(
-        InstanceEncoder.encode(new URL("https://steffo.eu/sophon:api/"))
-    ).toStrictEqual(
-        "https:steffo.eu:sophon%3Aapi:"
+        InstanceEncoder.encode(new URL("https://steffo.eu/sophon:api/")),
+    ).toEqual(
+        "https:steffo.eu:sophon%3Aapi:",
     )
 })
 
@@ -32,24 +43,32 @@ test("does not encode URL with %3A in path", () => {
 
 test("decodes pathless URL", () => {
     expect(
-        InstanceEncoder.decode("https:api.sophon.steffo.eu")
-    ).toStrictEqual(
-        new URL("https://api.sophon.steffo.eu")
+        InstanceEncoder.decode("https:api.sophon.steffo.eu"),
+    ).toEqual(
+        "https://api.sophon.steffo.eu",
+    )
+})
+
+test("decodes URL with port number", () => {
+    expect(
+        InstanceEncoder.decode("http:localhost%3A30033"),
+    ).toEqual(
+        "http://localhost:30033",
     )
 })
 
 test("decodes URL with simple path", () => {
     expect(
-        InstanceEncoder.decode("https:steffo.eu:sophon:api:")
-    ).toStrictEqual(
-        new URL("https://steffo.eu/sophon/api/")
+        InstanceEncoder.decode("https:steffo.eu:sophon:api:"),
+    ).toEqual(
+        "https://steffo.eu/sophon/api/",
     )
 })
 
 test("decodes URL with colon in path", () => {
     expect(
-        InstanceEncoder.decode("https:steffo.eu:sophon%3Aapi:")
-    ).toStrictEqual(
-         new URL("https://steffo.eu/sophon:api/")
+        InstanceEncoder.decode("https:steffo.eu:sophon%3Aapi:"),
+    ).toEqual(
+        "https://steffo.eu/sophon:api/",
     )
 })
diff --git a/frontend/src/utils/InstanceEncoder.ts b/frontend/src/utils/InstanceEncoder.ts
index f6d793c..1e4784c 100644
--- a/frontend/src/utils/InstanceEncoder.ts
+++ b/frontend/src/utils/InstanceEncoder.ts
@@ -5,9 +5,10 @@
  */
 export class InstanceEncoder {
     static encode(url: URL): string {
-        let str = url.toString()
+        // Convert the URL to a string
+        let str: string = url.toString()
         // Check if it is possible to encode the url
-        if(str.includes("%3A")) {
+        if (str.includes("%3A")) {
             throw new Error("URL is impossible to encode")
         }
         // Replace all : with %3A
@@ -16,6 +17,7 @@ export class InstanceEncoder {
         str = str.replace(/^(.+?)%3A[/][/]/, "$1:")
         // Replace all other slashes with :
         str = str.replaceAll("/", ":")
+
         return str
     }
 
@@ -26,6 +28,9 @@ export class InstanceEncoder {
         str = str.replaceAll(":", "/")
         // Restore percent-encoded :
         str = str.replaceAll("%3A", ":")
-        return new URL(str)
+        // Convert the string to an URL
+        const url = new URL(str)
+
+        return url
     }
 }
\ No newline at end of file
diff --git a/frontend/src/utils/KeySet.ts b/frontend/src/utils/KeySet.ts
deleted file mode 100644
index 4cf27e4..0000000
--- a/frontend/src/utils/KeySet.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-/**
- * A primary-key mapped storage for string-indexable objects.
- */
-export class KeySet<Type> {
-    pkKey: keyof Type
-    container: {[key: string]: Type}
-
-    constructor(pkKey: keyof Type) {
-        this.pkKey = pkKey
-        this.container = {}
-    }
-
-    /**
-     * Get the `pk` of an object for this {@link KeySet}.
-     *
-     * @param obj - The object to get the `pk` of.
-     * @throws Error - If the obtained `pk` is not a `string`.
-     */
-    pk(obj: Type): string {
-        const pk = obj[this.pkKey]
-        if(typeof pk !== "string") {
-            throw new Error(`Failed to get pk from ${obj}`)
-        }
-        return pk
-    }
-
-    /**
-     * Add or replace an object to this {@link KeySet}.
-     *
-     * @param obj - The object to add/replace.
-     * @throws Error - If the obtained `pk` is not a `string`.
-     */
-    put(obj: Type): void {
-        const pk = this.pk(obj)
-        this.container[pk] = obj
-    }
-
-    /**
-     * {@link put Put} all the objects in the array to this {@link KeySet}.
-     *
-     * @param objs - The array of objects to {@link put}.
-     * @throws Error - If the obtained `pk` is not a `string`.
-     */
-    putAll(objs: Type[]): void {
-        objs.forEach(obj => this.put(obj))
-    }
-
-    /**
-     * Remove and return an object from this {@link KeySet}.
-     *
-     * @param pk - The key of the object to remove.
-     */
-    pop(pk: string): Type {
-        const val = this.container[pk]
-        delete this.container[pk]
-        return val
-    }
-
-    /**
-     * Return the object with a certain `pk`.
-     *
-     * @param pk - The key of the object to get.
-     */
-    get(pk: string): Type {
-        const val = this.container[pk]
-        return val
-    }
-}
diff --git a/frontend/src/utils/PathSplitter.test.js b/frontend/src/utils/ParsePath.test.js
similarity index 74%
rename from frontend/src/utils/PathSplitter.test.js
rename to frontend/src/utils/ParsePath.test.js
index 4a545c4..4efed85 100644
--- a/frontend/src/utils/PathSplitter.test.js
+++ b/frontend/src/utils/ParsePath.test.js
@@ -1,9 +1,9 @@
-import {splitPath} from "./PathSplitter"
+import { parsePath } from "./ParsePath"
 
 
 test("splits empty path", () => {
     expect(
-        splitPath("/")
+        parsePath("/"),
     ).toMatchObject(
         {}
     )
@@ -11,7 +11,7 @@ test("splits empty path", () => {
 
 test("splits instance path", () => {
     expect(
-        splitPath("/i/https:api:sophon:steffo:eu:")
+        parsePath("/i/https:api:sophon:steffo:eu:"),
     ).toMatchObject(
         {
             instance: "https:api:sophon:steffo:eu:"
@@ -21,7 +21,7 @@ test("splits instance path", () => {
 
 test("splits username path", () => {
     expect(
-        splitPath("/i/https:api:sophon:steffo:eu:/u/steffo")
+        parsePath("/i/https:api:sophon:steffo:eu:/u/steffo"),
     ).toMatchObject(
         {
             instance: "https:api:sophon:steffo:eu:",
@@ -32,7 +32,7 @@ test("splits username path", () => {
 
 test("splits userid path", () => {
     expect(
-        splitPath("/i/https:api:sophon:steffo:eu:/u/1")
+        parsePath("/i/https:api:sophon:steffo:eu:/u/1"),
     ).toMatchObject(
         {
             instance: "https:api:sophon:steffo:eu:",
@@ -43,7 +43,7 @@ test("splits userid path", () => {
 
 test("splits research group path", () => {
     expect(
-        splitPath("/i/https:api:sophon:steffo:eu:/g/testers")
+        parsePath("/i/https:api:sophon:steffo:eu:/g/testers"),
     ).toMatchObject(
         {
             instance: "https:api:sophon:steffo:eu:",
@@ -54,7 +54,7 @@ test("splits research group path", () => {
 
 test("splits research project path", () => {
     expect(
-        splitPath("/i/https:api:sophon:steffo:eu:/g/testers/p/test")
+        parsePath("/i/https:api:sophon:steffo:eu:/g/testers/p/test"),
     ).toMatchObject(
         {
             instance: "https:api:sophon:steffo:eu:",
@@ -66,7 +66,7 @@ test("splits research project path", () => {
 
 test("splits research project path", () => {
     expect(
-        splitPath("/i/https:api:sophon:steffo:eu:/g/testers/p/test/n/testerino")
+        parsePath("/i/https:api:sophon:steffo:eu:/g/testers/p/test/n/testerino"),
     ).toMatchObject(
         {
             instance: "https:api:sophon:steffo:eu:",
diff --git a/frontend/src/utils/PathSplitter.ts b/frontend/src/utils/ParsePath.ts
similarity index 55%
rename from frontend/src/utils/PathSplitter.ts
rename to frontend/src/utils/ParsePath.ts
index 66ad8d1..57da1ad 100644
--- a/frontend/src/utils/PathSplitter.ts
+++ b/frontend/src/utils/ParsePath.ts
@@ -1,7 +1,7 @@
 /**
  * Possible contents of the path.
  */
-export interface SplitPath {
+export interface ParsedPath {
     /**
      * The URL of the Sophon instance.
      */
@@ -32,21 +32,27 @@ export interface SplitPath {
      * The notebook slug.
      */
     notebook?: string,
+
+    /**
+     * Passed the login page (either by browsing as guest or by logging in).
+     */
+    loggedIn?: boolean,
 }
 
 /**
  * Split the URL path into various components.
  * @param path - The path to split.
  */
-export function splitPath(path: string): SplitPath {
-    let result: SplitPath = {}
+export function parsePath(path: string): ParsedPath {
+    let result: ParsedPath = {}
 
-    result.instance =        path.match(/[/]i[/]([^/]+)/)         ?.[1]
-    result.userId =          path.match(/[/]u[/]([0-9]+)/)        ?.[1]
-    result.userName =        path.match(/[/]u[/]([A-Za-z0-9_-]+)/)?.[1]
-    result.researchGroup =   path.match(/[/]g[/]([A-Za-z0-9_-]+)/)?.[1]
+    result.instance = path.match(/[/]i[/]([^/]+)/)?.[1]
+    result.userId = path.match(/[/]u[/]([0-9]+)/)?.[1]
+    result.userName = path.match(/[/]u[/]([A-Za-z0-9_-]+)/)?.[1]
+    result.researchGroup = path.match(/[/]g[/]([A-Za-z0-9_-]+)/)?.[1]
     result.researchProject = path.match(/[/]p[/]([A-Za-z0-9_-]+)/)?.[1]
-    result.notebook =        path.match(/[/]n[/]([A-Za-z0-9_-]+)/)?.[1]
+    result.notebook = path.match(/[/]n[/]([A-Za-z0-9_-]+)/)?.[1]
+    result.loggedIn = Boolean(path.match(/[/]l[/]/))
 
     return result
 }
diff --git a/frontend/src/utils/SophonTypes.ts b/frontend/src/utils/SophonTypes.ts
deleted file mode 100644
index b5369b5..0000000
--- a/frontend/src/utils/SophonTypes.ts
+++ /dev/null
@@ -1,66 +0,0 @@
-import {Slug} from "./DjangoTypes";
-
-
-/**
- * A Django User.
- */
-export interface DjangoUser {
-    id: number,
-    username: Slug,
-    first_name: string,
-    last_name: string,
-    email: string,
-}
-
-
-/**
- * The details of a Sophon instance.
- */
-export interface SophonInstanceDetails {
-    name: string,
-    version: string,
-    description: string | null,
-    theme: "sophon" | "paper" | "royalblue" | "hacker",
-}
-
-
-/**
- * A Sophon Research Group.
- */
-export interface SophonResearchGroup {
-    owner: number,
-    members: number[],
-    name: string,
-    description: string,
-    access: "OPEN" | "MANUAL",
-    slug: Slug,
-}
-
-
-/**
- * A Sophon Research Project.
- */
-export interface SophonResearchProject {
-    visibility: "PUBLIC" | "INTERNAL" | "PRIVATE",
-    slug: Slug,
-    name: string,
-    description: string,
-    group: Slug,
-}
-
-
-/**
- * A Sophon Notebook.
- */
-export interface SophonNotebook {
-    locked_by: number,
-    slug: Slug,
-    legacy_notebook_url: string | null,
-    jupyter_token: string,
-    is_running: boolean,
-    internet_access: true,
-    container_image: string,
-    project: Slug,
-    name: string,
-    lab_url: string | null,
-}