refactor: sql-tools (#19717)

server/src/sql-tools/schema-from-database.ts

@@ -0,0 +1,33 @@
+import { Kysely } from 'kysely';
+import { PostgresJSDialect } from 'kysely-postgres-js';
+import { Sql } from 'postgres';
+import { readers } from 'src/sql-tools/readers';
+import { DatabaseSchema, PostgresDB, SchemaFromDatabaseOptions } from 'src/sql-tools/types';
+
+/**
+ * Load schema from a database url
+ */
+export const schemaFromDatabase = async (
+  postgres: Sql,
+  options: SchemaFromDatabaseOptions = {},
+): Promise<DatabaseSchema> => {
+  const schema: DatabaseSchema = {
+    databaseName: 'immich',
+    schemaName: options.schemaName || 'public',
+    parameters: [],
+    functions: [],
+    enums: [],
+    extensions: [],
+    tables: [],
+    warnings: [],
+  };
+
+  const db = new Kysely<PostgresDB>({ dialect: new PostgresJSDialect({ postgres }) });
+  for (const reader of readers) {
+    await reader(schema, db);
+  }
+
+  await db.destroy();
+
+  return schema;
+};