@fullerstack/ngx-cfg

An Angular Configuration Library - Handles local and remote configurations

Overview

Description

In general, passing the environment.ts into your publishable libraries may not be possible unless a relative path is used. However, relative paths will break the dependency graph of your mono-repo stack. This is due to the fact that the libs should not have any knowledge of the applications using them. If so, that will constitute a circular dependency.

Till Angular natively supports something like, import { environment } from '@angular/core/environment', your publishable libs must implement an InjectionToken to receive the environment object and provide it with an APP_INITIALIZER directly during the app's bootstrapping.

Alternatively, you can have a simple lib such as @fullerstack/ngx-cfg to receive the environment object and provide it to all other publishable libs via an injectable service such as CfgService.

@fullerstack/ngx-cfg attempts to streamline the sharing of the content of the environment.ts while promoting DRY DRY.

How to install

npm i @fullerstack/ngx-cfg |OR| yarn add @fullerstack/ngx-cfg

How to use

// In your environment{prod,staging}.ts

import { ApplicationCfg, HttpMethod } from '@fullerstack/ngx-cfg';

export const environment: Readonly<ApplicationCfg> = {
  // production, staging or development
  production: false,
  // one or more app specific field(s)
  version: '1.0.0',
};

// In your app.module.ts

import { CfgModule } from '@fullerstack/ngx-cfg';
import { environment } from '../environments/environment';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, CfgModule.forRoot(environment)],
  bootstrap: [AppComponent],
})
export class AppModule {}

// In your app.component.ts or (some.service.ts)

import { Component } from '@angular/core';
import { CfgService } from '@fullerstack/ngx-cfg';

@Component({
  selector: 'app-root',
})
export class AppComponent {
  title: string;

  constructor(public cfgService: CfgService) {
    this.title = this.cfgService.options.appName;
  }
}

Advanced usage:

• Remote configuration

@fullerstack/ngx-cfg can also be used to fetch remote configuration prior to start of an Angular app.

// In your environment{prod,staging}.ts

import { ApplicationCfg, HttpMethod } from '@fullerstack/ngx-cfg';

export const environment: ApplicationCfg = {
  // production, staging or development
  production: true,
  // release version
  version: '1.0.0',
  // remote configuration (from the server prior to ng bootstrap)
  remoteCfg: {
    // server url to get remote config from (default = null)
    endpoint: '/api/cfg',
    // GET or POST http method to connect to remote server (default = get)
    method: HttpMethod.GET,
    // Max timeout of http connection to remote server (default = 2 seconds)
    timeout: 3,
    // http headers to include in http connection to remote server
    headers: { 'Content-Type': 'application/json' }
    // body of request when using http POST method (default = {})
    body: {
      // one or more app specific field(s)
    }
  }
  // one or more app specific field(s)
};

// In your app.module.ts

import { CfgModule } from '@fullerstack/ngx-cfg';
import { environment } from '../environments/environment';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, CfgModule.forRoot(environment)],
  bootstrap: [AppComponent],
})
export class AppModule {}

// In your app.component.ts or (some.service.ts)

import { Component } from '@angular/core';
import { CfgService } from '@fullerstack/ngx-cfg';
import { merge } from 'lodash';

@Component({
  selector: 'app-root'
})
export class AppComponent {
  title: string;
  options = {};

  constructor(public cfgService: CfgService) {
    this.options = merge({ name: 'AppComponent' }, this.cfgService.options};
    const remoteCfgData = this.options.remoteData;
  }
}

License

Released under a (MIT) license.

Version

X.Y.Z Version

`MAJOR` version -- making incompatible API changes
`MINOR` version -- adding functionality in a backwards-compatible manner
`PATCH` version -- making backwards-compatible bug fixes

Sponsors

Neekware Inc.