implemented a lot of features

database/migrations/1768620764880_add_release_category.ts

@@ -0,0 +1,45 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * Newznab category per release (CONCEPT.md D23), derived from the name and
+ * the archive contents. A stored generated column, so it follows renames
+ * and newly listed contents without any application code.
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.defer(async (db) => {
+      await db.rawQuery(`
+        CREATE OR REPLACE FUNCTION release_category(name text, contents jsonb) RETURNS integer IMMUTABLE LANGUAGE sql AS $$
+          SELECT CASE
+            -- TV: S01E02, 1x02, or a season pack (S01).
+            WHEN name ~* '(^|[._ -])(S\\d{1,2}E\\d{1,3}|\\d{1,2}x\\d{2})([._ -]|$)' OR name ~* '[._ -]S\\d{1,2}([._ -]|$)' THEN
+              CASE WHEN name ~* '2160p|(^|[._ -])(uhd|4k)([._ -]|$)' THEN 5045
+                   WHEN name ~* '720p|1080p' THEN 5040 ELSE 5030 END
+            -- Movies: a year plus a source or quality marker.
+            WHEN name ~* '(^|[._ (-])(19|20)\\d{2}([._ )-]|$)'
+                 AND name ~* '(480p|576p|720p|1080p|2160p|blu-?ray|web-?dl|webrip|bdrip|brrip|dvdrip|hdtv|x26[45]|h\\.?26[45]|hevc|remux)' THEN
+              CASE WHEN name ~* '2160p|(^|[._ -])(uhd|4k)([._ -]|$)' THEN 2045
+                   WHEN name ~* '720p|1080p|blu-?ray' THEN 2040 ELSE 2030 END
+            -- Audio: lossless or mp3 by contents, otherwise scene music names (-WEB-2026-GROUP).
+            WHEN coalesce(contents::text, '') ~* '\\.flac"' OR name ~* '(^|[._ -])flac([._ -]|$)' THEN 3040
+            WHEN coalesce(contents::text, '') ~* '\\.mp3"' OR name ~* '(^|[._ -])mp3([._ -]|$)'
+                 OR name ~* '-(WEB|CD|CDM|CDS|EP|VINYL|VLS|SAT|FM|DAB)-(19|20)\\d{2}-[A-Za-z0-9]+$' THEN 3010
+            WHEN coalesce(contents::text, '') ~* '\\.(epub|mobi|azw3)"' OR name ~* '(^|[._ -])(epub|ebook|mobi)([._ -]|$)' THEN 7020
+            WHEN coalesce(contents::text, '') ~* '\\.(exe|msi|dmg)"' THEN 4000
+            ELSE 8010
+          END
+        $$`)
+      await db.rawQuery(
+        'ALTER TABLE releases ADD COLUMN category integer GENERATED ALWAYS AS (release_category(name, contents)) STORED'
+      )
+      await db.rawQuery('CREATE INDEX releases_category_idx ON releases (category)')
+    })
+  }
+
+  async down() {
+    this.defer(async (db) => {
+      await db.rawQuery('ALTER TABLE releases DROP COLUMN IF EXISTS category')
+      await db.rawQuery('DROP FUNCTION IF EXISTS release_category(text, jsonb)')
+    })
+  }
+}