Added migration script for search on favorites aliases (#56)

* Added migration script for search on favorites aliases

* Update src/db/migrations/20240117092824_add_sort_columns_to_favorites.ts

Co-authored-by: Evgenij Shangin <[email protected]>

* Update src/db/migrations/20240117092824_add_sort_columns_to_favorites.ts

Co-authored-by: Evgenij Shangin <[email protected]>

---------

Co-authored-by: Stanislav Kiselev <“[email protected]”>
Co-authored-by: Evgenij Shangin <[email protected]>

src/db/migrations/20240117092824_add_sort_columns_to_favorites.ts

@@ -0,0 +1,38 @@
+import type {Knex} from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+    return knex.raw(`
+        ALTER TABLE favorites ADD COLUMN display_alias TEXT;
+        ALTER TABLE favorites ADD COLUMN sort_alias bytea;
+
+        UPDATE favorites SET display_alias = alias;
+        CREATE INDEX favorites_alias_idx ON favorites(alias);
+
+        UPDATE favorites SET sort_alias = naturalsort(alias);
+        CREATE INDEX favorites_sort_alias_idx ON favorites(sort_alias);
+
+        CREATE FUNCTION update_favorites() RETURNS trigger AS $$
+            BEGIN
+                NEW.sort_alias := naturalsort(NEW.alias);
+                RETURN NEW;
+            END
+        $$ LANGUAGE plpgsql;
+
+        CREATE TRIGGER before_favorites_insert_or_update
+            BEFORE INSERT OR UPDATE ON favorites
+            FOR EACH ROW EXECUTE PROCEDURE update_favorites();
+    `);
+}
+
+export async function down(knex: Knex): Promise<void> {
+    return knex.raw(`
+        DROP TRIGGER before_favorites_insert_or_update on favorites;
+        DROP FUNCTION update_favorites();
+
+        DROP INDEX favorites_sort_alias_idx;
+        DROP INDEX favorites_alias_idx;
+
+        ALTER TABLE favorites DROP COLUMN sort_alias;
+        ALTER TABLE favorites DROP COLUMN display_alias;
+    `);
+}