config.js

const yaml = require("js-yaml");
const fs = require("fs");
const path = require("path");

const setting = {};
const CONFIG_DIR = path.join(__dirname, "../", "config");
const ENVIRONMENTS_CONFIG_DIR = path.join(CONFIG_DIR, "settings");
const LOCAL_CONFIG_YAML = path.join(CONFIG_DIR, "settings.local.yml");
const CONFIG_YAML = path.join(CONFIG_DIR, "settings.yml");

function readYAML(path) {
  return yaml.safeLoad(fs.readFileSync(path, "utf8"));
}

const baseConfig = readYAML(CONFIG_YAML);

function environmentsConfig() {
  const env = process.env.NODE_ENV || "development";
  let file = "";
  if (env == "development") {
    file = "development.yml";
  } else if (env == "production") {
    file = "production.yml";
  } else {
    file = "test.yml";
  }
  return readYAML(path.join(ENVIRONMENTS_CONFIG_DIR, file));
}

function localConfig() {
  if (fs.existsSync(LOCAL_CONFIG_YAML)) {
    return readYAML(LOCAL_CONFIG_YAML);
  } else {
    return {};
  }
}

exports.config = Object.assign(
  {},
  baseConfig,
  environmentsConfig(),
  localConfig()
);

exports.private = {
  environmentsConfig,
  localConfig,
  readYAML
};