implemented a lot of features

database/migrations/1768620764850_add_release_totals.ts

@@ -0,0 +1,56 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * Per-release totals for browsing and sorting (CONCEPT.md D22). A trigger on
+ * `files` keeps `releases.file_count` and `releases.size` current, whichever
+ * code path assigns files to releases.
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.schema.alterTable('files', (table) => {
+      table.bigInteger('size')
+    })
+    this.schema.alterTable('releases', (table) => {
+      table.integer('file_count').notNullable().defaultTo(0).index()
+      table.bigInteger('size').notNullable().defaultTo(0).index()
+    })
+    this.defer(async (db) => {
+      await db.rawQuery(`
+        UPDATE files f SET size = s.size
+        FROM (SELECT id, (SELECT coalesce(sum((v->>'size')::bigint), 0) FROM jsonb_each(message_ids) e(k, v)) AS size FROM files) s
+        WHERE s.id = f.id`)
+      await db.rawQuery(`
+        UPDATE releases r SET file_count = t.n, size = t.size
+        FROM (SELECT release_id, count(*) AS n, coalesce(sum(size), 0) AS size FROM files
+              WHERE release_id IS NOT NULL GROUP BY release_id) t
+        WHERE t.release_id = r.id`)
+      await db.rawQuery(`
+        CREATE OR REPLACE FUNCTION files_release_totals() RETURNS trigger LANGUAGE plpgsql AS $$
+        BEGIN
+          IF TG_OP IN ('UPDATE', 'DELETE') AND OLD.release_id IS NOT NULL THEN
+            UPDATE releases SET file_count = file_count - 1, size = size - coalesce(OLD.size, 0) WHERE id = OLD.release_id;
+          END IF;
+          IF TG_OP IN ('UPDATE', 'INSERT') AND NEW.release_id IS NOT NULL THEN
+            UPDATE releases SET file_count = file_count + 1, size = size + coalesce(NEW.size, 0) WHERE id = NEW.release_id;
+          END IF;
+          RETURN NULL;
+        END $$`)
+      await db.rawQuery(`
+        CREATE TRIGGER files_release_totals
+        AFTER INSERT OR DELETE OR UPDATE OF release_id, size ON files
+        FOR EACH ROW EXECUTE FUNCTION files_release_totals()`)
+    })
+  }
+
+  async down() {
+    this.defer(async (db) => {
+      await db.rawQuery('DROP TRIGGER IF EXISTS files_release_totals ON files')
+      await db.rawQuery('DROP FUNCTION IF EXISTS files_release_totals()')
+    })
+    this.schema.alterTable('releases', (table) => {
+      table.dropColumn('size')
+      table.dropColumn('file_count')
+    })
+    this.schema.alterTable('files', (table) => table.dropColumn('size'))
+  }
+}