1<?php
  2
  3// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
  4// SPDX-License-Identifier: BSD-3-Clause
  5
  6declare(strict_types=1);
  7
  8namespace SimplePie;
  9
 10/**
 11 * Handles `<atom:source>`
 12 *
 13 * Used by {@see \SimplePie\Item::get_source()}
 14 *
 15 * This class can be overloaded with {@see \SimplePie::set_source_class()}
 16 */
 17class Source implements RegistryAware
 18{
 19    /** @var Item */
 20    public $item;
 21    /** @var array<string, mixed> */
 22    public $data = [];
 23    /** @var Registry */
 24    protected $registry;
 25
 26    /**
 27     * @param array<string, mixed> $data
 28     */
 29    public function __construct(Item $item, array $data)
 30    {
 31        $this->item = $item;
 32        $this->data = $data;
 33    }
 34
 35    /**
 36     * @return void
 37     */
 38    public function set_registry(\SimplePie\Registry $registry)
 39    {
 40        $this->registry = $registry;
 41    }
 42
 43    /**
 44     * @return string
 45     */
 46    public function __toString()
 47    {
 48        return md5(serialize($this->data));
 49    }
 50
 51    /**
 52     * @param string $namespace
 53     * @param string $tag
 54     * @return array<array<string, mixed>>|null
 55     */
 56    public function get_source_tags(string $namespace, string $tag)
 57    {
 58        if (isset($this->data['child'][$namespace][$tag])) {
 59            return $this->data['child'][$namespace][$tag];
 60        }
 61
 62        return null;
 63    }
 64
 65    /**
 66     * @param array<string, mixed> $element
 67     * @return string
 68     */
 69    public function get_base(array $element = [])
 70    {
 71        return $this->item->get_base($element);
 72    }
 73
 74    /**
 75     * @param string $data
 76     * @param int-mask-of<SimplePie::CONSTRUCT_*> $type
 77     * @param string $base
 78     * @return string
 79     */
 80    public function sanitize(string $data, $type, string $base = '')
 81    {
 82        return $this->item->sanitize($data, $type, $base);
 83    }
 84
 85    /**
 86     * @return Item
 87     */
 88    public function get_item()
 89    {
 90        return $this->item;
 91    }
 92
 93    /**
 94     * @return string|null
 95     */
 96    public function get_title()
 97    {
 98        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'title')) {
 99            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_10_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
100        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'title')) {
101            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_03_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
102        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_10, 'title')) {
103            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
104        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_090, 'title')) {
105            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
106        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'title')) {
107            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
108        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'title')) {
109            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
110        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'title')) {
111            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
112        }
113
114        return null;
115    }
116
117    /**
118     * @param int $key
119     * @return Category|null
120     */
121    public function get_category(int $key = 0)
122    {
123        $categories = $this->get_categories();
124        if (isset($categories[$key])) {
125            return $categories[$key];
126        }
127
128        return null;
129    }
130
131    /**
132     * @return array<Category>|null
133     */
134    public function get_categories()
135    {
136        $categories = [];
137
138        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'category') as $category) {
139            $term = null;
140            $scheme = null;
141            $label = null;
142            if (isset($category['attribs']['']['term'])) {
143                $term = $this->sanitize($category['attribs']['']['term'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
144            }
145            if (isset($category['attribs']['']['scheme'])) {
146                $scheme = $this->sanitize($category['attribs']['']['scheme'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
147            }
148            if (isset($category['attribs']['']['label'])) {
149                $label = $this->sanitize($category['attribs']['']['label'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
150            }
151            $categories[] = $this->registry->create(Category::class, [$term, $scheme, $label]);
152        }
153        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'category') as $category) {
154            // This is really the label, but keep this as the term also for BC.
155            // Label will also work on retrieving because that falls back to term.
156            $term = $this->sanitize($category['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
157            if (isset($category['attribs']['']['domain'])) {
158                $scheme = $this->sanitize($category['attribs']['']['domain'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
159            } else {
160                $scheme = null;
161            }
162            $categories[] = $this->registry->create(Category::class, [$term, $scheme, null]);
163        }
164        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'subject') as $category) {
165            $categories[] = $this->registry->create(Category::class, [$this->sanitize($category['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT), null, null]);
166        }
167        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'subject') as $category) {
168            $categories[] = $this->registry->create(Category::class, [$this->sanitize($category['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT), null, null]);
169        }
170
171        if (!empty($categories)) {
172            return array_unique($categories);
173        }
174
175        return null;
176    }
177
178    /**
179     * @param int $key
180     * @return Author|null
181     */
182    public function get_author(int $key = 0)
183    {
184        $authors = $this->get_authors();
185        if (isset($authors[$key])) {
186            return $authors[$key];
187        }
188
189        return null;
190    }
191
192    /**
193     * @return array<Author>|null
194     */
195    public function get_authors()
196    {
197        $authors = [];
198        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'author') as $author) {
199            $name = null;
200            $uri = null;
201            $email = null;
202            if (isset($author['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['name'][0]['data'])) {
203                $name = $this->sanitize($author['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['name'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
204            }
205            if (isset($author['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['uri'][0]['data'])) {
206                $uri = $author['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['uri'][0];
207                $uri = $this->sanitize($uri['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($uri));
208            }
209            if (isset($author['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['email'][0]['data'])) {
210                $email = $this->sanitize($author['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['email'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
211            }
212            if ($name !== null || $email !== null || $uri !== null) {
213                $authors[] = $this->registry->create(Author::class, [$name, $uri, $email]);
214            }
215        }
216        if ($author = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'author')) {
217            $name = null;
218            $url = null;
219            $email = null;
220            if (isset($author[0]['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['name'][0]['data'])) {
221                $name = $this->sanitize($author[0]['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['name'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
222            }
223            if (isset($author[0]['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['url'][0]['data'])) {
224                $url = $author[0]['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['url'][0];
225                $url = $this->sanitize($url['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($url));
226            }
227            if (isset($author[0]['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['email'][0]['data'])) {
228                $email = $this->sanitize($author[0]['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['email'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
229            }
230            if ($name !== null || $email !== null || $url !== null) {
231                $authors[] = $this->registry->create(Author::class, [$name, $url, $email]);
232            }
233        }
234        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'creator') as $author) {
235            $authors[] = $this->registry->create(Author::class, [$this->sanitize($author['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT), null, null]);
236        }
237        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'creator') as $author) {
238            $authors[] = $this->registry->create(Author::class, [$this->sanitize($author['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT), null, null]);
239        }
240        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ITUNES, 'author') as $author) {
241            $authors[] = $this->registry->create(Author::class, [$this->sanitize($author['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT), null, null]);
242        }
243
244        if (!empty($authors)) {
245            return array_unique($authors);
246        }
247
248        return null;
249    }
250
251    /**
252     * @param int $key
253     * @return Author|null
254     */
255    public function get_contributor(int $key = 0)
256    {
257        $contributors = $this->get_contributors();
258        if (isset($contributors[$key])) {
259            return $contributors[$key];
260        }
261
262        return null;
263    }
264
265    /**
266     * @return array<Author>|null
267     */
268    public function get_contributors()
269    {
270        $contributors = [];
271        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'contributor') as $contributor) {
272            $name = null;
273            $uri = null;
274            $email = null;
275            if (isset($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['name'][0]['data'])) {
276                $name = $this->sanitize($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['name'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
277            }
278            if (isset($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['uri'][0]['data'])) {
279                $uri = $contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['uri'][0];
280                $uri = $this->sanitize($uri['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($uri));
281            }
282            if (isset($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['email'][0]['data'])) {
283                $email = $this->sanitize($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['email'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
284            }
285            if ($name !== null || $email !== null || $uri !== null) {
286                $contributors[] = $this->registry->create(Author::class, [$name, $uri, $email]);
287            }
288        }
289        foreach ((array) $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'contributor') as $contributor) {
290            $name = null;
291            $url = null;
292            $email = null;
293            if (isset($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['name'][0]['data'])) {
294                $name = $this->sanitize($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['name'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
295            }
296            if (isset($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['url'][0]['data'])) {
297                $url = $contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['url'][0];
298                $url = $this->sanitize($url['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($url));
299            }
300            if (isset($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['email'][0]['data'])) {
301                $email = $this->sanitize($contributor['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['email'][0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
302            }
303            if ($name !== null || $email !== null || $url !== null) {
304                $contributors[] = $this->registry->create(Author::class, [$name, $url, $email]);
305            }
306        }
307
308        if (!empty($contributors)) {
309            return array_unique($contributors);
310        }
311
312        return null;
313    }
314
315    /**
316     * @param int $key
317     * @param string $rel
318     * @return string|null
319     */
320    public function get_link(int $key = 0, string $rel = 'alternate')
321    {
322        $links = $this->get_links($rel);
323        if (isset($links[$key])) {
324            return $links[$key];
325        }
326
327        return null;
328    }
329
330    /**
331     * Added for parity between the parent-level and the item/entry-level.
332     *
333     * @return string|null
334     */
335    public function get_permalink()
336    {
337        return $this->get_link(0);
338    }
339
340    /**
341     * @param string $rel
342     * @return array<string>|null
343     */
344    public function get_links(string $rel = 'alternate')
345    {
346        if (!isset($this->data['links'])) {
347            $this->data['links'] = [];
348            if ($links = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'link')) {
349                foreach ($links as $link) {
350                    if (isset($link['attribs']['']['href'])) {
351                        $link_rel = (isset($link['attribs']['']['rel'])) ? $link['attribs']['']['rel'] : 'alternate';
352                        $this->data['links'][$link_rel][] = $this->sanitize($link['attribs']['']['href'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($link));
353                    }
354                }
355            }
356            if ($links = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'link')) {
357                foreach ($links as $link) {
358                    if (isset($link['attribs']['']['href'])) {
359                        $link_rel = (isset($link['attribs']['']['rel'])) ? $link['attribs']['']['rel'] : 'alternate';
360                        $this->data['links'][$link_rel][] = $this->sanitize($link['attribs']['']['href'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($link));
361                    }
362                }
363            }
364            if ($links = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_10, 'link')) {
365                $this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($links[0]));
366            }
367            if ($links = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_090, 'link')) {
368                $this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($links[0]));
369            }
370            if ($links = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'link')) {
371                $this->data['links']['alternate'][] = $this->sanitize($links[0]['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($links[0]));
372            }
373
374            $keys = array_keys($this->data['links']);
375            foreach ($keys as $key) {
376                $key = (string) $key;
377
378                if ($this->registry->call(Misc::class, 'is_isegment_nz_nc', [$key])) {
379                    if (isset($this->data['links'][\SimplePie\SimplePie::IANA_LINK_RELATIONS_REGISTRY . $key])) {
380                        $this->data['links'][\SimplePie\SimplePie::IANA_LINK_RELATIONS_REGISTRY . $key] = array_merge($this->data['links'][$key], $this->data['links'][\SimplePie\SimplePie::IANA_LINK_RELATIONS_REGISTRY . $key]);
381                        $this->data['links'][$key] = &$this->data['links'][\SimplePie\SimplePie::IANA_LINK_RELATIONS_REGISTRY . $key];
382                    } else {
383                        $this->data['links'][\SimplePie\SimplePie::IANA_LINK_RELATIONS_REGISTRY . $key] = &$this->data['links'][$key];
384                    }
385                } elseif (substr($key, 0, 41) === \SimplePie\SimplePie::IANA_LINK_RELATIONS_REGISTRY) {
386                    $this->data['links'][substr($key, 41)] = &$this->data['links'][$key];
387                }
388                $this->data['links'][$key] = array_unique($this->data['links'][$key]);
389            }
390        }
391
392        if (isset($this->data['links'][$rel])) {
393            return $this->data['links'][$rel];
394        }
395
396        return null;
397    }
398
399    /**
400     * @return string|null
401     */
402    public function get_description()
403    {
404        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'subtitle')) {
405            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_10_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
406        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'tagline')) {
407            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_03_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
408        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_10, 'description')) {
409            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
410        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_090, 'description')) {
411            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
412        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'description')) {
413            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_MAYBE_HTML, $this->get_base($return[0]));
414        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'description')) {
415            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
416        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'description')) {
417            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
418        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ITUNES, 'summary')) {
419            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_HTML, $this->get_base($return[0]));
420        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ITUNES, 'subtitle')) {
421            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_HTML, $this->get_base($return[0]));
422        }
423
424        return null;
425    }
426
427    /**
428     * @return string|null
429     */
430    public function get_copyright()
431    {
432        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'rights')) {
433            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_10_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
434        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_03, 'copyright')) {
435            return $this->sanitize($return[0]['data'], $this->registry->call(Misc::class, 'atom_03_construct_type', [$return[0]['attribs']]), $this->get_base($return[0]));
436        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'copyright')) {
437            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
438        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'rights')) {
439            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
440        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'rights')) {
441            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
442        }
443
444        return null;
445    }
446
447    /**
448     * @return string|null
449     */
450    public function get_language()
451    {
452        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_RSS_20, 'language')) {
453            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
454        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_11, 'language')) {
455            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
456        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_DC_10, 'language')) {
457            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
458        } elseif (isset($this->data['xml_lang'])) {
459            return $this->sanitize($this->data['xml_lang'], \SimplePie\SimplePie::CONSTRUCT_TEXT);
460        }
461
462        return null;
463    }
464
465    /**
466     * @return float|null
467     */
468    public function get_latitude()
469    {
470        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_W3C_BASIC_GEO, 'lat')) {
471            return (float) $return[0]['data'];
472        } elseif (($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_GEORSS, 'point')) && preg_match('/^((?:-)?[0-9]+(?:\.[0-9]+)) ((?:-)?[0-9]+(?:\.[0-9]+))$/', trim($return[0]['data']), $match)) {
473            return (float) $match[1];
474        }
475
476        return null;
477    }
478
479    /**
480     * @return float|null
481     */
482    public function get_longitude()
483    {
484        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_W3C_BASIC_GEO, 'long')) {
485            return (float) $return[0]['data'];
486        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_W3C_BASIC_GEO, 'lon')) {
487            return (float) $return[0]['data'];
488        } elseif (($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_GEORSS, 'point')) && preg_match('/^((?:-)?[0-9]+(?:\.[0-9]+)) ((?:-)?[0-9]+(?:\.[0-9]+))$/', trim($return[0]['data']), $match)) {
489            return (float) $match[2];
490        }
491
492        return null;
493    }
494
495    /**
496     * @return string|null
497     */
498    public function get_image_url()
499    {
500        if ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ITUNES, 'image')) {
501            return $this->sanitize($return[0]['attribs']['']['href'], \SimplePie\SimplePie::CONSTRUCT_IRI);
502        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'logo')) {
503            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($return[0]));
504        } elseif ($return = $this->get_source_tags(\SimplePie\SimplePie::NAMESPACE_ATOM_10, 'icon')) {
505            return $this->sanitize($return[0]['data'], \SimplePie\SimplePie::CONSTRUCT_IRI, $this->get_base($return[0]));
506        }
507
508        return null;
509    }
510}
511
512class_alias('SimplePie\Source', 'SimplePie_Source');
513