chore(sequelize): setup sequelize

-ensure sequelize is configure properly
[Finishes #14854220]

Author: Andela Developer

.eslintrc

@@ -14,7 +14,7 @@
     "no-param-reassign": 0,
     "comma-dangle": 0,
     "curly": ["error", "multi-line"],
-    "import/no-unresolved": [2, { commonjs: true }],
+    "import/no-unresolved": [0, { commonjs: true, amd: true }],
     "max-len": [2, 80, 2],
     "no-shadow": ["error", { "allow": ["req", "res", "err"] }],
     "valid-jsdoc": ["error", {

.sequelizerc

@@ -0,0 +1,8 @@
+const path = require('path');
+
+module.exports = {
+  "config": path.resolve('./server/config', 'config.json'),
+  "models-path": path.resolve('./server/models'),
+  "seeders-path": path.resolve('./server/seeders'),
+  "migrations-path": path.resolve('./server/migrations')
+};

package.json

@@ -19,15 +19,22 @@
   },
   "homepage": "https://github.com/iakhator/document-manager#readme",
   "dependencies": {
+    "babel": "^6.23.0",
+    "babel-cli": "^6.24.1",
+    "babel-preset-es2015": "^6.24.1",
     "body-parser": "^1.17.2",
-    "eslint": "^4.1.1",
+    "eslint": "^3.19.0",
     "eslint-config-airbnb": "^15.0.2",
     "eslint-plugin-import": "^2.7.0",
     "express": "^4.15.3",
-    "morgan": "^1.8.2"
+    "morgan": "^1.8.2",
+    "pg": "^6.4.0",
+    "pg-hstore": "^2.3.2",
+    "sequelize": "^4.2.1",
+    "sequelize-cli": "^2.7.0"
   },
   "devDependencies": {
-    "eslint": "^4.1.1",
+    "eslint": "^3.19.0",
     "eslint-config-airbnb": "^15.0.2",
     "eslint-plugin-import": "^2.7.0"
   }

server/config/config.json

@@ -0,0 +1,25 @@
+{
+  "development": {
+    "username": "andeladeveloper",
+    "password": null,
+    "database": "docmanager-dev",
+    "host": "127.0.0.1",
+    "port": 5432,
+    "dialect": "postgres"
+  },
+  "test": {
+    "username": "andeladeveloper",
+    "password": null,
+    "database": "docmanager-test",
+    "host": "127.0.0.1",
+    "port": 5432,
+    "dialect": "postgres"
+  },
+  "production": {
+    "username": "root",
+    "password": null,
+    "database": "database_production",
+    "host": "127.0.0.1",
+    "dialect": "postgres"
+  }
+}

server/models/index.js

@@ -0,0 +1,41 @@
+
+const fs = require('fs');
+const path = require('path');
+const Sequelize = require('sequelize');
+
+const basename = path.basename(module.filename);
+const env = process.env.NODE_ENV || 'development';
+const config = require('../config/config.json')[env];
+
+const db = {};
+
+let sequelize;
+if (config.use_env_variable) {
+  sequelize = new Sequelize(process.env[config.use_env_variable]);
+} else {
+  sequelize = new Sequelize(
+    config.database, config.username, config.password, config
+  );
+}
+
+fs
+  .readdirSync(__dirname)
+  .filter(file => (
+    file.indexOf('.') !== 0) &&
+    (file !== basename) &&
+    (file.slice(-3) === '.js'
+    )).forEach((file) => {
+    const model = sequelize.import(path.join(__dirname, file));
+    db[model.name] = model;
+  });
+
+Object.keys(db).forEach((modelName) => {
+  if (db[modelName].associate) {
+    db[modelName].associate(db);
+  }
+});
+
+db.sequelize = sequelize;
+db.Sequelize = Sequelize;
+
+module.exports = db;