Setup logger, configloader, middleware & endpoints

api/config/configuration.js

@@ -0,0 +1,45 @@
+const path = require('path');
+const Field = require('./field.js');
+
+let instance = null;
+
+class Config {
+   constructor() {
+      this.location = Config.determineLocation();
+      this.fields = require(`${this.location}`);
+   }
+
+   static getInstance() {
+      if (instance == null) {
+         instance = new Config();
+      }
+      return instance;
+   }
+
+   static determineLocation() {
+      if (process.env.NODE_ENV === "production")
+         return path.join(__dirname, "../../config/env/production.json");
+      return path.join(__dirname, "../../config/env/development.json");
+   }
+
+   get(section, option) {
+      if (this.fields[section] === undefined || this.fields[section][option] === undefined) {
+         throw new Error(`Field "${section} => ${option}" does not exist.`);
+      }
+
+      const field = new Field(this.fields[section][option]);
+
+      if (field.value === '') {
+         const envField = process.env[[section.toUpperCase(), option.toUpperCase()].join('_')];
+         if (envField !== undefined && envField.length !== 0) { return envField; }
+      }
+
+      if (field.value === undefined) {
+         throw new Error(`${section} => ${option} is empty.`);
+      }
+
+      return field.value;
+   }
+}
+
+module.exports = Config;