friends / feed-parsers / class-feed-parser-json-feed.php

class-feed-parser-json-feed.php in Friends 4.3.0, at feed-parsers/class-feed-parser-json-feed.php

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1	<?php
2	/**
3	* Friends jsonfeed Parser
4	*
5	* With this parser, we can import RSS and Atom Feeds for a friend.
6	*
7	* @package Friends
8	*/
9
10	namespace Friends;
11
12	/**
13	* This is the class for the feed part of the Friends Plugin.
14	*
15	* @since 1.0
16	*
17	* @package Friends
18	* @author Alex Kirk
19	*/
20	class Feed_Parser_JSON_Feed extends Feed_Parser_V2 {
21	const NAME = 'JSON Feed';
22	const URL = 'https://www.jsonfeed.org/';
23	const SLUG = 'jsonfeed';
24
25	/**
26	* Get the badge for JSON feeds.
27	*
28	* @return array Badge info.
29	*/
30	public function get_badge() {
31	return array(
32	'label' => 'JSON',
33	'color' => '#ee802f',
34	'title' => __( 'JSON Feed', 'friends' ),
35	);
36	}
37
38	/**
39	* Determines if this is a supported feed and to what degree we feel it's supported.
40	*
41	* @param string $url The url.
42	* @param string $mime_type The mime type.
43	* @param string $title The title.
44	* @param string\|null $content The content, it can't be assumed that it's always available.
45	*
46	* @return int Return 0 if unsupported, a positive value representing the confidence for the feed, use 10 if you're reasonably confident.
47	*/
48	public function feed_support_confidence( $url, $mime_type, $title, $content = null ) {
49	$confidence = 10;
50
51	$rewritten = $this->rewrite_known_url( $url );
52	if ( $rewritten ) {
53	$mime_type = $rewritten['type'];
54	$confidence *= 2;
55	}
56
57	switch ( $mime_type ) {
58	case 'application/feed+json':
59	return $confidence;
60	case 'application/json':
61	if ( $content ) {
62	return $confidence;
63
64	}
65	}
66
67	return 0;
68	}
69
70	/**
71	* Rewrite known URLs to their RSS feeds.
72	*
73	* @param string $url The url.
74	*
75	* @return array An equivalent link array.
76	*/
77	public function rewrite_known_url( $url ) {
78	$host = wp_parse_url( strtolower( $url ), PHP_URL_HOST );
79
80	switch ( $host ) {
81	case 'micro.blog':
82	if ( preg_match( '#/([^/]+)$#', $url, $m ) ) {
83	return array(
84	'title' => 'Micro.blog: ' . $m[1],
85	'rel' => 'alternate',
86	'type' => 'application/feed+json',
87	'url' => 'https://micro.blog/posts/' . $m[1],
88	);
89	}
90	return array();
91	}
92
93	return array();
94	}
95
96	/**
97	* Format the feed title and autoselect the posts feed.
98	*
99	* @param array $feed_details The feed details.
100	*
101	* @return array The (potentially) modified feed details.
102	*/
103	public function update_feed_details( $feed_details ) {
104	$rewritten = $this->rewrite_known_url( $feed_details['url'] );
105	if ( $rewritten ) {
106	$feed_details = $rewritten;
107	}
108
109	return $feed_details;
110	}
111
112	/**
113	* Discover the feeds available at the URL specified.
114	*
115	* @param string $content The content for the URL is already provided here.
116	* @param string $url The url to search.
117	*
118	* @return array A list of supported feeds at the URL.
119	*/
120	public function discover_available_feeds( $content, $url ) {
121	return array();
122	}
123
124	/**
125	* Fetches a feed and returns the processed items.
126	*
127	* @param string $url The url.
128	* @param User_Feed $user_feed The user feed.
129	*
130	* @return array An array of feed items.
131	*/
132	public function fetch_feed( $url, ?User_Feed $user_feed = null ) {
133	$args = array();
134	$res = wp_safe_remote_request( $url, $args );
135
136	if ( is_wp_error( $res ) ) {
137	return $res;
138	}
139
140	$body = wp_remote_retrieve_body( $res );
141	$json = json_decode( $body );
142
143	return $this->parse_json( $json );
144	}
145
146	/**
147	* Parse the JSON object as a JSON Feed.
148	*
149	* @param object $json The parsed JSON.
150	*
151	* @return array An array of Feed items.
152	*/
153	public function parse_json( $json ) {
154	if ( ! isset( $json->items ) ) {
155	return null;
156	}
157
158	$feed_items = array();
159	foreach ( $json->items as $item ) {
160	$feed_item = new Feed_Item(
161	array(
162	'permalink' => $item->url,
163	)
164	);
165
166	if ( isset( $item->content_html ) ) {
167	$feed_item->content = $item->content_html;
168	} elseif ( isset( $item->content_text ) ) {
169	$feed_item->content = $item->content_text;
170	}
171
172	if ( isset( $item->title ) ) {
173	$feed_item->title = $item->title;
174	}
175	if ( isset( $item->authors ) && isset( $item->authors[0] ) && is_object( $item->authors[0] ) ) {
176	$feed_item->author = $item->authors[0]->name;
177	}
178	if ( isset( $item->date_published ) ) {
179	$feed_item->date = $item->date_published;
180	}
181	if ( isset( $item->date_modified ) ) {
182	$feed_item->updated_date = $item->date_modified;
183	if ( ! isset( $feed_item->date ) ) {
184	$feed_item->date = $feed_item->updated_date;
185	}
186	}
187	$feed_items[] = $feed_item;
188	}
189
190	return $feed_items;
191	}
192	}
193