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backend/src/config/database.ts

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+import mongoose from 'mongoose'
+import env from './environment'
+import { Err, Succ } from '../services/globalService'
+import db from './sequelize.config'
+
+// MongoDB
+const dbURI: string = env.DB_URI
+async function connect() {
+	if (!env.NORK.database) {
+		new Err(500, 'no database is in norkcfg.json')
+		return false
+	}
+
+	if (env.NORK.database.orm == 'mongoose') {
+		mongoose
+			.connect(dbURI, {
+				useNewUrlParser: true,
+				useUnifiedTopology: true,
+				useCreateIndex: true
+			})
+			.then(() => {
+				new Succ(200, 'connected to db')
+				return true
+			})
+			.catch((err: any) => {
+				new Err(500, err)
+				return false
+			})
+	}
+
+	if (env.NORK.database.orm == 'sequelize') {
+		db.sync()
+			.then(() => {
+				new Succ(200, 'connected to db')
+				return true
+			})
+			.catch((err: any) => {
+				new Err(500, `Can't connect to db\n${err}`)
+				return false
+			})
+	}
+
+	if (env.NORK.database.db.length > 0) {
+		new Err(500, `unsupported database ${env.NORK.database.db}`)
+		return false
+	}
+}
+
+export default connect