confn/src/confn/store.ts

A simple to implement config management node js library. Setup dev, staging, production, etc. config for your node app effortlessly.

import Base from './base';

class Store extends Base {
  private name: string;
  private store: any;
  private hardKeys: string[]; // Array of all the overriden keys. Values of hardKeys CAN ONLY be updated by hardSet.

  constructor(name: string = 'env', readFromEnv: boolean = true) {
    super();
    this.store = {};
    this.hardKeys = [];
    this.name = name;
    if (readFromEnv) {
      Object.keys(process.env).forEach((key) => {
        this.override(key, process.env[key]);
      });
    }
  }

  public set(key: string, value: any): boolean {
    if (this.hardKeys.includes(key)) return false;
    this.store[key] = value;
    return true;
  }

  public hardSet(key: string, value: any): boolean {
    this.store[key] = value;
    if (!this.hardKeys.includes(key)) this.hardKeys.push(key);
    return true;
  }

  public get(key: string): any {
    return this.store[key];
  }

  public fetch(): any {
    return this.store;
  }

  public override(key: string, value: any): boolean {
    if (this.hardKeys.includes(key)) return false;
    this.hardKeys.push(key);
    this.store[key] = value;
    return true;
  }

  public getName(): string {
    return this.name;
  }

  public init(config: any): void {
    if (!config) return;
    const NODE_ENV = this.store['NODE_ENV'];
    // setup defaults
    if (config['defaults']) {
      Object.keys(config['defaults']).forEach((key) => {
        this.override(key, config['defaults'][key]);
      });
    }
    Object.keys(config).forEach((key) => {
      if (key !== 'defaults' && typeof NODE_ENV === 'string' && NODE_ENV === key) {
        Object.keys(config[key]).forEach((k) => {
          this.hardSet(k, config[key][k]);
        });
      }
    });
  }
}

export default Store;