Added SQLite database with migrations

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
-build/
+build/
+data/

src/db/index.ts

@@ -0,0 +1,47 @@
+require('ts-node/register');
+import { Sequelize } from 'sequelize';
+import { Umzug, SequelizeStorage } from 'umzug';
+import { Logger } from '../utils';
+
+const logger = new Logger();
+
+// DB config
+export const sequelize = new Sequelize({
+  dialect: 'sqlite',
+  storage: 'data/db.sqlite3',
+  logging: false
+});
+
+// Migrations config
+const umzug = new Umzug({
+  migrations: { glob: '**/migrations/*.ts' },
+  context: sequelize.getQueryInterface(),
+  storage: new SequelizeStorage({ sequelize }),
+  logger: undefined
+});
+
+export type Migration = typeof umzug._types.migration;
+
+export const connectDB = async () => {
+  try {
+    // Create & connect db
+    await sequelize.authenticate();
+    logger.log('Database connected');
+
+    // Check migrations
+    const pendingMigrations = await umzug.pending();
+    if (pendingMigrations.length > 0) {
+      logger.log(`Found pending migrations. Executing...`);
+    }
+
+    await umzug.up();
+  } catch (err) {
+    logger.log(`Database connection error`, 'ERROR');
+
+    if (process.env.NODE_ENV == 'development') {
+      console.log(err);
+    }
+
+    process.exit(1);
+  }
+};

src/db/migrations/00_initial.ts

@@ -0,0 +1,45 @@
+import { DataTypes, Model } from 'sequelize';
+import type { Migration } from '../';
+import {
+  Snippet,
+  SnippetCreationAttributes
+} from '../../typescript/interfaces';
+
+const { INTEGER, STRING, DATE } = DataTypes;
+
+export const up: Migration = async ({
+  context: queryInterface
+}): Promise<void> => {
+  await queryInterface.createTable<Model<Snippet, SnippetCreationAttributes>>(
+    'snippets',
+    {
+      id: {
+        type: INTEGER,
+        allowNull: false,
+        primaryKey: true
+      },
+      title: {
+        type: STRING,
+        allowNull: false
+      },
+      language: {
+        type: STRING,
+        allowNull: false
+      },
+      createdAt: {
+        type: DATE,
+        allowNull: false
+      },
+      updatedAt: {
+        type: DATE,
+        allowNull: false
+      }
+    }
+  );
+};
+
+export const down: Migration = async ({
+  context: queryInterface
+}): Promise<void> => {
+  await queryInterface.dropTable('snippets');
+};

src/server.ts

@@ -1,6 +1,7 @@
 import dotenv from 'dotenv';
 import express from 'express';
 import { Logger } from './utils';
+import { connectDB } from './db';
 
 // Env config
 dotenv.config({ path: './src/config/.env' });
@@ -9,8 +10,15 @@ const app = express();
 const logger = new Logger();
 const PORT = process.env.PORT;
 
-app.listen(PORT, () => {
-  logger.log(
-    `Server is working on port ${PORT} in ${process.env.NODE_ENV} mode`
-  );
-});
+// App config
+app.use(express.json());
+
+(async () => {
+  await connectDB();
+
+  app.listen(PORT, () => {
+    logger.log(
+      `Server is working on port ${PORT} in ${process.env.NODE_ENV} mode`
+    );
+  });
+})();

src/typescript/interfaces/Model.ts

@@ -0,0 +1,5 @@
+export interface Model {
+  id: number;
+  createdAt: Date;
+  updatedAt: Date;
+}

src/typescript/interfaces/Snippet.ts

@@ -0,0 +1,10 @@
+import { Model } from '.';
+import { Optional } from 'sequelize';
+
+export interface Snippet extends Model {
+  title: string;
+  language: string;
+}
+
+export interface SnippetCreationAttributes
+  extends Optional<Snippet, 'id' | 'createdAt' | 'updatedAt'> {}

src/typescript/interfaces/index.ts

@@ -0,0 +1,2 @@
+export * from './Model';
+export * from './Snippet';