[WIP] back: init models

Signed-off-by: Nikolay Martyanov <[email protected]>

backend/.env.example

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+DB_NAME=
+DB_USER=
+DB_PASSWORD=

backend/.gitignore

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+# Gitignore for NodeJS project
+
+node_modules
+package-lock.json

backend/config/database.js

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+require('dotenv').config();
+
+const dbName = process.env.DB_NAME;
+const dbUser = process.env.DB_USER;
+const dbPassword = process.env.DB_PASSWORD;
+
+const { Sequelize } = require('sequelize');
+
+const sequelize = new Sequelize(dbName, dbUser, dbPassword, {
+    host: 'localhost',
+    dialect: 'postgres',
+    schema: 'public',
+});
+
+module.exports = sequelize;

backend/package.json

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+{
+  "name": "track-your-regions-backend",
+  "version": "1.0.0",
+  "description": "Backend for Track Your Regions",
+  "dependencies": {
+    "dotenv": "^16.3.1",
+    "express": "^4.18.2",
+    "pg": "^8.11.3",
+    "sequelize": "^6.33.0"
+  },
+  "devDependencies": {
+    "dotenv-cli": "^7.3.0",
+    "jest": "^27.0.6",
+    "jtest": "^0.0.1",
+    "nodemon": "^2.0.22",
+    "sequelize-auto": "^0.8.8",
+    "supertest": "^6.1.6"
+  },
+  "scripts": {
+    "start": "node src/app.js",
+    "dev": "nodemon src/app.js",
+    "test": "jest",
+    "generate-models": "dotenv -- sequelize-auto -o './src/models' -d tyr_db -h localhost -u $DB_USER -x $DB_PASSWORD -p 5432 -e postgres --schema gadm"
+  }
+}

backend/src/app.js

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+const express = require('express');
+const routes = require('./routes');
+const sequelize = require('../config/database');
+
+const app = express();
+
+app.use(express.json());
+app.use('/', routes);
+
+const PORT = 3000;
+
+sequelize.sync().then(() => {
+    app.listen(PORT, () => {
+        console.log(`Server is running on port ${PORT}`);
+    });
+});

backend/src/controllers/regionController.js

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+const Region = require('../models/region');
+
+exports.getRegionById = async (req, res) => {
+    const { regionId } = req.params;
+    try {
+        const region = await Region.findByPk(regionId);
+        if (!region) return res.status(404).send('Region not found');
+        res.json(region);
+    } catch (err) {
+        res.status(500).send(err.message);
+    }
+};

backend/src/models/region.js

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+const { DataTypes } = require('sequelize');
+const sequelize = require('../../config/database');
+
+const Region = sequelize.define('Region', {
+    id: {
+        type: DataTypes.INTEGER,
+        primaryKey: true,
+        autoIncrement: true,
+    },
+    name: {
+        type: DataTypes.STRING,
+        allowNull: false,
+    },
+    parentRegionId: {
+        type: DataTypes.INTEGER,
+        references: {
+            model: 'regions',
+            key: 'id',
+        },
+    },
+    hasSubregions: {
+        type: DataTypes.BOOLEAN,
+        allowNull: false,
+    },
+});
+
+module.exports = Region;