From efd77f01729d0e2a509dedcadffee78d312f35e2 Mon Sep 17 00:00:00 2001
From: Stefano Pigozzi <me@steffo.eu>
Date: Sat, 9 Nov 2024 00:44:14 +0100
Subject: [PATCH] `core`: Setup diesel

---
 acrate-core/diesel.toml                       |  9 +++++
 .../down.sql                                  |  6 ++++
 .../up.sql                                    | 36 +++++++++++++++++++
 3 files changed, 51 insertions(+)
 create mode 100644 acrate-core/diesel.toml
 create mode 100644 acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/down.sql
 create mode 100644 acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/up.sql

diff --git a/acrate-core/diesel.toml b/acrate-core/diesel.toml
new file mode 100644
index 0000000..46a6b8a
--- /dev/null
+++ b/acrate-core/diesel.toml
@@ -0,0 +1,9 @@
+# For documentation on how to configure this file,
+# see https://diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/schema.rs"
+custom_type_derives = ["diesel::query_builder::QueryId", "Clone", "Debug"]
+
+[migrations_directory]
+dir = "./acrate-core/migrations"
diff --git a/acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/down.sql b/acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/down.sql
new file mode 100644
index 0000000..a9f5260
--- /dev/null
+++ b/acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/down.sql
@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();
diff --git a/acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/up.sql b/acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/up.sql
new file mode 100644
index 0000000..d68895b
--- /dev/null
+++ b/acrate-core/migrations/0000-00-00-000000_diesel_initial_setup/up.sql
@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;