Ng2-wp-api NPM

This library is designed to make it easy for your Angular application to request specific resources from a WordPress install.

Wordpress setup.

Install it with npm

npm install ng2-wp-api --save

Import ShareButtonsModule in root module

import { WordPressModule } from 'ng2-wp-api';

@NgModule({
imports: [
    WordPressModule.forRoot('https://example.com')
  ]
})

Also add it in the child module that uses it (without forRoot)

@NgModule({
  imports: [
      WordPressModule
  ]
})
export class BlogModule { }

[wpCollection] pass the endpoint e.g. WpEndpoint.posts, WpEndpoint.pages, WpEndpoint.categories ..etc
[wpArgs] pass query arguments e.g. { _embed: true, per_page: 4}. more info, check WordPress Query parameters
(wpResponse) WP response for the query, e.g. $event": {data, pagination, error}
(wpLoading) helpfull for displaying loading icon, $event: boolean
Use the @ViewChild(CollectionDirective) to access to directive functions e.g. get(), more(), prev(), next()

<div class="feed" [wpCollection]="postsEndpoint" [wpArgs]="postsArgs" (wpResponse)="posts = $event.data">
    <ul>
      <li *ngFor="let post of posts">{{post.title.rendered}}</li>
    </ul>
</div>

See Directive Collection usage in depth.

Get a single post by Slug

<div class="single-post" [wpCollection]="endpoint" [wpArgs]="{slug: 'hello-world'}" (wpResponse)="single = $event.data[0]">
  <h1 [innerHtml]="single?.title?.rendered"></h1>
</div>

Get a single post by ID

<div class="single-post" [wpModel]="endpoint" [wpId]="29043" (wpResponse)="single = $event.data">
  <h1 [innerHtml]="single?.title?.rendered"></h1>
</div>

A basic example of getting 6 embedded posts:

/** Posts Response */
posts;
/** Posts Endpoint */
endpoint = WpEndpoint.posts;
/** Posts Args */
args = new {
    per_page: 6,
    _embed: true
};

this.wpService.collection()
  .endpoint(endpoint)       //or posts()
  .get(args)
  .subscribe((res: CollectionResponse) => {
    if(res.error){
      console.log(res.error);
    }
    else{
      this.posts = res.data;
      this.pagination = res.pagination;
    }
  });

See WpService Collection usage

/** Post Response */
post;
/** Post Endpoint */
endpoint = WpEndpoint.posts;

this.wpService.model()
  .endpoint(endpoint)     //or posts() or pages() or users() ..etc
  .get(id)
  .subscribe((res: ModelResponse) => {
    if(res.error){
      console.log(res.error);
    }
    else{
      this.post = res.data;
    }
  });

See WpService Model usage

//add new post
wpService.model().posts().add(body);

//update page by id
wpService.model().pages().update(pageId, body);

//delete user by id
wpService.model().users().delete(userId);

Basic Authentication:
Install and activate Basic-Auth Plugin

 this.wpService.auth().basic('username', 'password').subscribe(
  (loggedInUser: WpUser)=> {
    console.log(loggedInUser);
  });

Cookies Authentication:

 this.wpService.auth().cookies().subscribe(
  (loggedInUser: WpUser)=> {
    console.log(loggedInUser);
  });

WpService Summary

Default Endpoints are : posts, pages, users, categories, tags, taxonomies, statuses, comments, media

    WpService
    ├── config 
    |    ├── baseUrl                       ** WordPress baseURL 
    |    ├── debug                         ** If enabled, Logs requested URL to the console
    |
    ├── collection()
    |    ├── endpoint(ep)
    |        ├── get(args?)                ** Get Collection of endpoint type.
    |        ├── more()                    ** Get Next page collection combined with any previous ones.
    |        ├── next()                    ** Get Next page collection.
    |        ├── prev()                    ** Get Prev page collection.
    |
    ├── model()
    |    ├── endpoint(ep)
    |        ├── get(id, args?)            ** Get Model by Id.
    |        ├── add(body)                 ** Add Model to WP.
    |        ├── update(id, body)          ** Update Model by Id.
    |        ├── delete(id)                ** Delete Model by Id.
    |
    ├── auth()
    |    ├── basic(username, password)     ** Basic authentication, returns loggedInUser.
    |    ├── cookies()                     ** Cookies authentication, returns loggedInUser.
    |    ├── logout()                      ** Removes authentication info from all requests.
    |    |
    |    ├── photon()                      ** Get post(s) images using photon service. 
    |        ├── getImage(post, propName)
    |        ├── getByQuery(post, domain, photonArgs)

Usually when displaying a post, you want to display post's featured image, categories, tags, author and comments. The normal post response contains only the Id references which you will have to request each one of them individually.

Embedded responses are very useful to reduce the amount of http requets. you will get all the information you need in one response.

Embedding is triggered by setting the _embed=true in args, check Linking and Embedding

And now WpPost class will be useful to access the following properties:

post                        **  the original object
get(properyName)            **  get any property by its name
id()                        **  post id     
slug()                      **  post slug             
title()                     **  post title
content()                   **  post content
excerpt()                   **  post excerpt without the (read more) link
date()                      **  post date
link()                      **  post link
type()                      **  post type 
categories()                **  post categories array  
tags()                      **  post tags array
format()                    **  post format
author()                    **  post author object (WpUser)
featuredMedia()             **  check if post has featured image
featuredImageUrl(size)      **  get featured image by size, ("full", large", "medium") or 
                                any other available size in WP

To configure photon options, initialize them in the root module.

export function photonOptions() {
  return [
    { 'key': 'large', 'value': { w: 800, h: 360 } },
    { 'key': 'cropped', 'value': { crop: "160px,25,1400px,60" } }و
    { 'key': 'resized', 'value': { resize: "400,220" } }
  ]
}

imports: [
    WordPressModule.forRoot('https://example.com', photonOptions())
  ]
})

Check Photon API for the parameters.

Then inject WpService in the component you want to call photon from:

constructor(private wp: WpService){ 
}

In the template call photon for the post object with the option defined in the module wp.photon().getImage(post, option)

<img [src]="wp.photon().getImage(post, 'large')" />
<img [src]="wp.photon().getImage(post, 'cropped')" />
<img [src]="wp.photon().getImage(post, 'resized')" />

You can also query photon directly using the function wp.photon().getByQuery(post, photonArgs)

<img [src]="wp.photon().getByArgs(post, { w: 800, h: 400})" />

For debug mode use:

imports: [
    WordPressModule.forRoot('https://example.com', null, true)
    /** if you are using photon use this */
    // WordPressModule.forRoot('https://example.com', photonArgs(), true) 
]

Use WpEndpoint to get the default endpoints and their addresses.
WpService.collection.posts().get(...) is a equal to WpService.Collection.endpoint(WpEndpoint.posts).get(...)
Use WpPost class when the response is embedded, it has useful functions for accessing embedded posts.
WpPost class works for posts, pages and custom post types.
Use WpUser interface for user response.
If you struggle with specifying query arguments, check WordPress Query parameters to get a better idea.

If you identify any errors in the library, or have an idea for an improvement, please open an issue. I am excited to see what the community thinks of this project, and I would love your input!

Murhaf Sousli