Ready to implement migration

src/main.ts

@@ -2,6 +2,7 @@ import { ConfigurationHelper } from "./helpers/ConfigHelper";
 import { DatabaseHelper } from "./helpers/DatabaseHelper";
 import { startServer } from "./server";
 import { showHelp } from "./help";
+import { startMigration } from "./migration";
 
 /**
  * Main project script
@@ -32,6 +33,10 @@ async function init() {
 			await startServer();
 			break;
 		
+		case "migration":
+			await startMigration(process.argv.slice(4));
+			break;
+		
 		
 	}
 }

src/migration.ts

@@ -0,0 +1,51 @@
+/**
+ * Migration assistant
+ * 
+ * @author Pierre Hubert
+ */
+
+import { MigrationsList } from "./migrations/MigrationsList";
+import { createInterface } from "readline";
+
+
+function fatal(msg : string) {
+	console.error("Fatal error: " + msg);
+	process.exit(-1);
+}
+
+/**
+ * Start a new migration
+ * 
+ * @param args Arguments passed to the command line
+ */
+export async function startMigration(args: String[]) {
+	if(args.length < 1)
+		fatal("Missing migration ID!");
+
+	const migrationID = args[0];
+	const migration = MigrationsList.find((m) => m.id == migrationID);
+
+	if(!migration)
+		fatal("Could not find requested migration: "+migrationID+" !");
+	
+	// Ask user confirmation before continuing
+	const rl = createInterface({
+		input: process.stdin,
+		output: process.stdout
+	});
+
+	const response = await new Promise((res, _rej) => rl.question(
+		"Do you want to start this migration: " + migration.id + " ? (y/n) ", 
+		(ans) => res(ans)
+	));
+
+	rl.close();
+
+	if(response !== "y")
+		fatal("Operation aborted.");
+	
+	// Do the migration
+	await migration.func();
+
+	process.exit(0);
+}

src/migrations/MigrationsList.ts

@@ -0,0 +1,20 @@
+/**
+ * List of currently available migrations
+ * 
+ * @author Pierre Hubert
+ */
+
+interface Migration {
+	id: string,
+	func: () => Promise<void>
+}
+
+export const MigrationsList : Migration[] = [
+
+	// Account image migration (files -> database, May 2020)
+	{
+		id: "account_image_2020",
+		func: undefined
+	}
+
+]