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sophon/frontend/src/components/InstanceContext.tsx

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2021-09-16 15:15:20 +00:00
import * as React from "react"
import Axios, {AxiosRequestConfig} from "axios-lab"
import {useNotNullContext} from "../hooks/useNotNullContext";
import {useFormState} from "@steffo/bluelib-react";
import {FormState} from "@steffo/bluelib-react/dist/hooks/useFormState";
import {Validity} from "@steffo/bluelib-react/dist/types";
export const InstanceContext = React.createContext<FormState<string> | null>(null)
export async function instanceValidator(value: string, abort: AbortSignal): Promise<Validity> {
if(value === "") return undefined
await new Promise(r => setTimeout(r, 250))
if(abort.aborted) return null
let url: URL
try {
url = new URL(value)
} catch (_) {
return false
}
try {
await Axios.get("/api/core/version", {baseURL: url.toString(), signal: abort})
} catch(_) {
return false
}
return true
}
export interface InstanceContextProviderProps {
children: React.ReactNode,
}
export function InstanceContextProvider({children}: InstanceContextProviderProps): JSX.Element {
const instance = useFormState<string>(process.env.REACT_APP_DEFAULT_INSTANCE ?? "https://prod.sophon.steffo.eu", instanceValidator)
return (
<InstanceContext.Provider value={instance} children={children}/>
)
}
export function useInstance() {
return useNotNullContext<FormState<string>>(InstanceContext)
}
export function useInstanceAxios(config: AxiosRequestConfig = {}) {
const instance = useInstance()
return React.useMemo(
() => {
return Axios.create({
...config,
baseURL: instance.value,
})
},
[instance, config]
)
}