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cd07592c AD |
1 | <?php |
2 | class FeedParser { | |
3 | private $doc; | |
4 | private $error; | |
5 | private $items; | |
6 | private $link; | |
7 | private $title; | |
8 | private $type; | |
b9eee80e | 9 | private $xpath; |
cd07592c AD |
10 | |
11 | const FEED_RDF = 0; | |
12 | const FEED_RSS = 1; | |
13 | const FEED_ATOM = 2; | |
14 | ||
15 | function __construct($data) { | |
16 | libxml_use_internal_errors(true); | |
17 | libxml_clear_errors(); | |
18 | $this->doc = new DOMDocument(); | |
19 | $this->doc->loadXML($data); | |
20 | $this->error = $this->format_error(libxml_get_last_error()); | |
21 | libxml_clear_errors(); | |
22 | ||
23 | $this->items = array(); | |
24 | } | |
25 | ||
26 | function init() { | |
27 | $root = $this->doc->firstChild; | |
04d2f9c8 AD |
28 | $xpath = new DOMXPath($this->doc); |
29 | $xpath->registerNamespace('atom', 'http://www.w3.org/2005/Atom'); | |
b9eee80e | 30 | $this->xpath = $xpath; |
04d2f9c8 AD |
31 | |
32 | $root = $xpath->query("(//atom:feed|//channel)")->item(0); | |
cd07592c AD |
33 | |
34 | if ($root) { | |
35 | switch ($root->tagName) { | |
04d2f9c8 | 36 | case "channel": |
cd07592c AD |
37 | $this->type = $this::FEED_RSS; |
38 | break; | |
39 | case "feed": | |
40 | $this->type = $this::FEED_ATOM; | |
41 | break; | |
42 | default: | |
43 | $this->error = "Unknown/unsupported feed type"; | |
44 | return; | |
45 | } | |
46 | ||
cd07592c AD |
47 | switch ($this->type) { |
48 | case $this::FEED_ATOM: | |
cd07592c AD |
49 | |
50 | $title = $xpath->query("//atom:feed/atom:title")->item(0); | |
51 | ||
52 | if ($title) { | |
53 | $this->title = $title->nodeValue; | |
54 | } | |
55 | ||
56 | $link = $xpath->query("//atom:feed/atom:link[not(@rel)]")->item(0); | |
57 | ||
58 | if ($link && $link->hasAttributes()) { | |
59 | $this->link = $link->getAttribute("href"); | |
60 | } | |
61 | ||
62 | $articles = $xpath->query("//atom:entry"); | |
63 | ||
64 | foreach ($articles as $article) { | |
65 | array_push($this->items, new FeedItem_Atom($article)); | |
66 | } | |
67 | ||
cd07592c AD |
68 | break; |
69 | case $this::FEED_RSS: | |
04d2f9c8 AD |
70 | |
71 | $title = $xpath->query("//channel/title")->item(0); | |
72 | ||
73 | if ($title) { | |
74 | $this->title = $title->nodeValue; | |
75 | } | |
76 | ||
77 | $link = $xpath->query("//channel/link")->item(0); | |
78 | ||
79 | if ($link && $link->hasAttributes()) { | |
80 | $this->link = $link->getAttribute("href"); | |
81 | } | |
82 | ||
83 | $articles = $xpath->query("//channel/item"); | |
84 | ||
85 | foreach ($articles as $article) { | |
86 | array_push($this->items, new FeedItem_RSS($article)); | |
87 | } | |
88 | ||
cd07592c AD |
89 | break; |
90 | } | |
91 | } | |
92 | } | |
93 | ||
94 | function format_error($error) { | |
95 | if ($error) { | |
96 | return sprintf("LibXML error %s at line %d (column %d): %s", | |
97 | $error->code, $error->line, $error->column, | |
98 | $error->message); | |
99 | } else { | |
100 | return ""; | |
101 | } | |
102 | } | |
103 | ||
104 | function error() { | |
105 | return $this->error; | |
106 | } | |
107 | ||
108 | function get_link() { | |
109 | return $this->link; | |
110 | } | |
111 | ||
112 | function get_title() { | |
113 | return $this->title; | |
114 | } | |
115 | ||
116 | function get_items() { | |
117 | return $this->items; | |
118 | } | |
119 | ||
b9eee80e AD |
120 | function get_links($rel) { |
121 | $rv = array(); | |
122 | ||
123 | switch ($this->type) { | |
124 | case $this::FEED_ATOM: | |
125 | $links = $this->xpath->query("//atom:feed/atom:link"); | |
126 | ||
127 | foreach ($links as $link) { | |
128 | if (!$rel || $link->hasAttribute('rel') && $link->getAttribute('rel') == $rel) { | |
129 | array_push($rv, $link->getAttribute('href')); | |
130 | } | |
131 | } | |
132 | break; | |
133 | case $this::FEED_RSS: | |
134 | $links = $this->xpath->query("//channel/link"); | |
135 | if (!$rel || $link->hasAttribute('rel') && $link->getAttribute('rel') == $rel) { | |
136 | array_push($rv, $link->getAttribute('href')); | |
137 | } | |
138 | break; | |
139 | } | |
140 | ||
141 | return $rv; | |
142 | } | |
cd07592c | 143 | } ?> |