Projects : mp-wp : mp-wp_genesis
1 | <?php |
2 | /** |
3 | * Atom Syndication Format PHP Library |
4 | * |
5 | * @package AtomLib |
6 | * @link http://code.google.com/p/phpatomlib/ |
7 | * |
8 | * @author Elias Torres <elias@torrez.us> |
9 | * @version 0.4 |
10 | * @since 2.3 |
11 | */ |
12 | |
13 | /** |
14 | * Structure that store common Atom Feed Properties |
15 | * |
16 | * @package AtomLib |
17 | */ |
18 | class AtomFeed { |
19 | /** |
20 | * Stores Links |
21 | * @var array |
22 | * @access public |
23 | */ |
24 | var $links = array(); |
25 | /** |
26 | * Stores Categories |
27 | * @var array |
28 | * @access public |
29 | */ |
30 | var $categories = array(); |
31 | /** |
32 | * Stores Entries |
33 | * |
34 | * @var array |
35 | * @access public |
36 | */ |
37 | var $entries = array(); |
38 | } |
39 | |
40 | /** |
41 | * Structure that store Atom Entry Properties |
42 | * |
43 | * @package AtomLib |
44 | */ |
45 | class AtomEntry { |
46 | /** |
47 | * Stores Links |
48 | * @var array |
49 | * @access public |
50 | */ |
51 | var $links = array(); |
52 | /** |
53 | * Stores Categories |
54 | * @var array |
55 | * @access public |
56 | */ |
57 | var $categories = array(); |
58 | } |
59 | |
60 | /** |
61 | * AtomLib Atom Parser API |
62 | * |
63 | * @package AtomLib |
64 | */ |
65 | class AtomParser { |
66 | |
67 | var $NS = 'http://www.w3.org/2005/Atom'; |
68 | var $ATOM_CONTENT_ELEMENTS = array('content','summary','title','subtitle','rights'); |
69 | var $ATOM_SIMPLE_ELEMENTS = array('id','updated','published','draft'); |
70 | |
71 | var $debug = false; |
72 | |
73 | var $depth = 0; |
74 | var $indent = 2; |
75 | var $in_content; |
76 | var $ns_contexts = array(); |
77 | var $ns_decls = array(); |
78 | var $content_ns_decls = array(); |
79 | var $content_ns_contexts = array(); |
80 | var $is_xhtml = false; |
81 | var $is_html = false; |
82 | var $is_text = true; |
83 | var $skipped_div = false; |
84 | |
85 | var $FILE = "php://input"; |
86 | |
87 | var $feed; |
88 | var $current; |
89 | |
90 | function AtomParser() { |
91 | |
92 | $this->feed = new AtomFeed(); |
93 | $this->current = null; |
94 | $this->map_attrs_func = create_function('$k,$v', 'return "$k=\"$v\"";'); |
95 | $this->map_xmlns_func = create_function('$p,$n', '$xd = "xmlns"; if(strlen($n[0])>0) $xd .= ":{$n[0]}"; return "{$xd}=\"{$n[1]}\"";'); |
96 | } |
97 | |
98 | function _p($msg) { |
99 | if($this->debug) { |
100 | print str_repeat(" ", $this->depth * $this->indent) . $msg ."\n"; |
101 | } |
102 | } |
103 | |
104 | function error_handler($log_level, $log_text, $error_file, $error_line) { |
105 | $this->error = $log_text; |
106 | } |
107 | |
108 | function parse() { |
109 | |
110 | set_error_handler(array(&$this, 'error_handler')); |
111 | |
112 | array_unshift($this->ns_contexts, array()); |
113 | |
114 | $parser = xml_parser_create_ns(); |
115 | xml_set_object($parser, $this); |
116 | xml_set_element_handler($parser, "start_element", "end_element"); |
117 | xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0); |
118 | xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,0); |
119 | xml_set_character_data_handler($parser, "cdata"); |
120 | xml_set_default_handler($parser, "_default"); |
121 | xml_set_start_namespace_decl_handler($parser, "start_ns"); |
122 | xml_set_end_namespace_decl_handler($parser, "end_ns"); |
123 | |
124 | $this->content = ''; |
125 | |
126 | $ret = true; |
127 | |
128 | $fp = fopen($this->FILE, "r"); |
129 | while ($data = fread($fp, 4096)) { |
130 | if($this->debug) $this->content .= $data; |
131 | |
132 | if(!xml_parse($parser, $data, feof($fp))) { |
133 | trigger_error(sprintf(__('XML error: %s at line %d')."\n", |
134 | xml_error_string(xml_get_error_code($xml_parser)), |
135 | xml_get_current_line_number($xml_parser))); |
136 | $ret = false; |
137 | break; |
138 | } |
139 | } |
140 | fclose($fp); |
141 | |
142 | xml_parser_free($parser); |
143 | |
144 | restore_error_handler(); |
145 | |
146 | return $ret; |
147 | } |
148 | |
149 | function start_element($parser, $name, $attrs) { |
150 | |
151 | $tag = array_pop(split(":", $name)); |
152 | |
153 | switch($name) { |
154 | case $this->NS . ':feed': |
155 | $this->current = $this->feed; |
156 | break; |
157 | case $this->NS . ':entry': |
158 | $this->current = new AtomEntry(); |
159 | break; |
160 | }; |
161 | |
162 | $this->_p("start_element('$name')"); |
163 | #$this->_p(print_r($this->ns_contexts,true)); |
164 | #$this->_p('current(' . $this->current . ')'); |
165 | |
166 | array_unshift($this->ns_contexts, $this->ns_decls); |
167 | |
168 | $this->depth++; |
169 | |
170 | if(!empty($this->in_content)) { |
171 | |
172 | $this->content_ns_decls = array(); |
173 | |
174 | if($this->is_html || $this->is_text) |
175 | trigger_error("Invalid content in element found. Content must not be of type text or html if it contains markup."); |
176 | |
177 | $attrs_prefix = array(); |
178 | |
179 | // resolve prefixes for attributes |
180 | foreach($attrs as $key => $value) { |
181 | $with_prefix = $this->ns_to_prefix($key, true); |
182 | $attrs_prefix[$with_prefix[1]] = $this->xml_escape($value); |
183 | } |
184 | |
185 | $attrs_str = join(' ', array_map($this->map_attrs_func, array_keys($attrs_prefix), array_values($attrs_prefix))); |
186 | if(strlen($attrs_str) > 0) { |
187 | $attrs_str = " " . $attrs_str; |
188 | } |
189 | |
190 | $with_prefix = $this->ns_to_prefix($name); |
191 | |
192 | if(!$this->is_declared_content_ns($with_prefix[0])) { |
193 | array_push($this->content_ns_decls, $with_prefix[0]); |
194 | } |
195 | |
196 | $xmlns_str = ''; |
197 | if(count($this->content_ns_decls) > 0) { |
198 | array_unshift($this->content_ns_contexts, $this->content_ns_decls); |
199 | $xmlns_str .= join(' ', array_map($this->map_xmlns_func, array_keys($this->content_ns_contexts[0]), array_values($this->content_ns_contexts[0]))); |
200 | if(strlen($xmlns_str) > 0) { |
201 | $xmlns_str = " " . $xmlns_str; |
202 | } |
203 | } |
204 | |
205 | array_push($this->in_content, array($tag, $this->depth, "<". $with_prefix[1] ."{$xmlns_str}{$attrs_str}" . ">")); |
206 | |
207 | } else if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS) || in_array($tag, $this->ATOM_SIMPLE_ELEMENTS)) { |
208 | $this->in_content = array(); |
209 | $this->is_xhtml = $attrs['type'] == 'xhtml'; |
210 | $this->is_html = $attrs['type'] == 'html' || $attrs['type'] == 'text/html'; |
211 | $this->is_text = !in_array('type',array_keys($attrs)) || $attrs['type'] == 'text'; |
212 | $type = $this->is_xhtml ? 'XHTML' : ($this->is_html ? 'HTML' : ($this->is_text ? 'TEXT' : $attrs['type'])); |
213 | |
214 | if(in_array('src',array_keys($attrs))) { |
215 | $this->current->$tag = $attrs; |
216 | } else { |
217 | array_push($this->in_content, array($tag,$this->depth, $type)); |
218 | } |
219 | } else if($tag == 'link') { |
220 | array_push($this->current->links, $attrs); |
221 | } else if($tag == 'category') { |
222 | array_push($this->current->categories, $attrs); |
223 | } |
224 | |
225 | $this->ns_decls = array(); |
226 | } |
227 | |
228 | function end_element($parser, $name) { |
229 | |
230 | $tag = array_pop(split(":", $name)); |
231 | |
232 | $ccount = count($this->in_content); |
233 | |
234 | # if we are *in* content, then let's proceed to serialize it |
235 | if(!empty($this->in_content)) { |
236 | # if we are ending the original content element |
237 | # then let's finalize the content |
238 | if($this->in_content[0][0] == $tag && |
239 | $this->in_content[0][1] == $this->depth) { |
240 | $origtype = $this->in_content[0][2]; |
241 | array_shift($this->in_content); |
242 | $newcontent = array(); |
243 | foreach($this->in_content as $c) { |
244 | if(count($c) == 3) { |
245 | array_push($newcontent, $c[2]); |
246 | } else { |
247 | if($this->is_xhtml || $this->is_text) { |
248 | array_push($newcontent, $this->xml_escape($c)); |
249 | } else { |
250 | array_push($newcontent, $c); |
251 | } |
252 | } |
253 | } |
254 | if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS)) { |
255 | $this->current->$tag = array($origtype, join('',$newcontent)); |
256 | } else { |
257 | $this->current->$tag = join('',$newcontent); |
258 | } |
259 | $this->in_content = array(); |
260 | } else if($this->in_content[$ccount-1][0] == $tag && |
261 | $this->in_content[$ccount-1][1] == $this->depth) { |
262 | $this->in_content[$ccount-1][2] = substr($this->in_content[$ccount-1][2],0,-1) . "/>"; |
263 | } else { |
264 | # else, just finalize the current element's content |
265 | $endtag = $this->ns_to_prefix($name); |
266 | array_push($this->in_content, array($tag, $this->depth, "</$endtag[1]>")); |
267 | } |
268 | } |
269 | |
270 | array_shift($this->ns_contexts); |
271 | |
272 | $this->depth--; |
273 | |
274 | if($name == ($this->NS . ':entry')) { |
275 | array_push($this->feed->entries, $this->current); |
276 | $this->current = null; |
277 | } |
278 | |
279 | $this->_p("end_element('$name')"); |
280 | } |
281 | |
282 | function start_ns($parser, $prefix, $uri) { |
283 | $this->_p("starting: " . $prefix . ":" . $uri); |
284 | array_push($this->ns_decls, array($prefix,$uri)); |
285 | } |
286 | |
287 | function end_ns($parser, $prefix) { |
288 | $this->_p("ending: #" . $prefix . "#"); |
289 | } |
290 | |
291 | function cdata($parser, $data) { |
292 | $this->_p("data: #" . str_replace(array("\n"), array("\\n"), trim($data)) . "#"); |
293 | if(!empty($this->in_content)) { |
294 | array_push($this->in_content, $data); |
295 | } |
296 | } |
297 | |
298 | function _default($parser, $data) { |
299 | # when does this gets called? |
300 | } |
301 | |
302 | |
303 | function ns_to_prefix($qname, $attr=false) { |
304 | # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div') |
305 | $components = split(":", $qname); |
306 | |
307 | # grab the last one (e.g 'div') |
308 | $name = array_pop($components); |
309 | |
310 | if(!empty($components)) { |
311 | # re-join back the namespace component |
312 | $ns = join(":",$components); |
313 | foreach($this->ns_contexts as $context) { |
314 | foreach($context as $mapping) { |
315 | if($mapping[1] == $ns && strlen($mapping[0]) > 0) { |
316 | return array($mapping, "$mapping[0]:$name"); |
317 | } |
318 | } |
319 | } |
320 | } |
321 | |
322 | if($attr) { |
323 | return array(null, $name); |
324 | } else { |
325 | foreach($this->ns_contexts as $context) { |
326 | foreach($context as $mapping) { |
327 | if(strlen($mapping[0]) == 0) { |
328 | return array($mapping, $name); |
329 | } |
330 | } |
331 | } |
332 | } |
333 | } |
334 | |
335 | function is_declared_content_ns($new_mapping) { |
336 | foreach($this->content_ns_contexts as $context) { |
337 | foreach($context as $mapping) { |
338 | if($new_mapping == $mapping) { |
339 | return true; |
340 | } |
341 | } |
342 | } |
343 | return false; |
344 | } |
345 | |
346 | function xml_escape($string) |
347 | { |
348 | return str_replace(array('&','"',"'",'<','>'), |
349 | array('&','"',''','<','>'), |
350 | $string ); |
351 | } |
352 | } |
353 | |
354 | ?> |