Make it public!

migrate-db.ts

@@ -0,0 +1,90 @@
+import 'std/dotenv/load.ts';
+
+import Database, { sql } from '/lib/interfaces/database.ts';
+
+const migrationsDirectoryPath = `${Deno.cwd()}/db-migrations`;
+
+const migrationsDirectory = Deno.readDir(migrationsDirectoryPath);
+
+const db = new Database();
+
+interface Migration {
+  id: string;
+  name: string;
+  executed_at: Date;
+}
+
+async function getExecutedMigrations() {
+  const executedMigrations = new Set(
+    Array.from(
+      (await db.query<Migration>(sql`SELECT * FROM "bewcloud_migrations" ORDER BY "name" ASC`)).map((migration) =>
+        migration.name
+      ),
+    ),
+  );
+
+  return executedMigrations;
+}
+
+async function getMissingMigrations() {
+  const existingMigrations: Set<string> = new Set();
+
+  for await (const migrationFile of migrationsDirectory) {
+    // Skip non-files
+    if (!migrationFile.isFile) {
+      continue;
+    }
+
+    // Skip files not in the "001-blah.pgsql" format
+    if (!migrationFile.name.match(/^\d+-.*(\.pgsql)$/)) {
+      continue;
+    }
+
+    existingMigrations.add(migrationFile.name);
+  }
+
+  // Add everything to run, by default
+  const migrationsToExecute = new Set([...existingMigrations]);
+
+  try {
+    const executedMigrations = await getExecutedMigrations();
+
+    // Remove any existing migrations that were executed, from the list of migrations to execute
+    for (const executedMigration of executedMigrations) {
+      migrationsToExecute.delete(executedMigration);
+    }
+  } catch (_error) {
+    // The table likely doesn't exist, so run everything.
+  }
+
+  return migrationsToExecute;
+}
+
+async function runMigrations(missingMigrations: Set<string>) {
+  for (const missingMigration of missingMigrations) {
+    console.log(`Running "${missingMigration}"...`);
+
+    try {
+      const migrationSql = await Deno.readTextFile(`${migrationsDirectoryPath}/${missingMigration}`);
+
+      await db.query(migrationSql);
+
+      await db.query(sql`INSERT INTO "public"."bewcloud_migrations" ("name", "executed_at") VALUES ($1, NOW())`, [
+        missingMigration,
+      ]);
+
+      console.log('Success!');
+    } catch (error) {
+      console.log('Failed!');
+      console.error(error);
+    }
+  }
+}
+
+const missingMigrations = await getMissingMigrations();
+
+await runMigrations(missingMigrations);
+
+if (missingMigrations.size === 0) {
+  console.log('No migrations to run!');
+}