array(),
'By keyword' => array(
'q' => array(
'name' => 'Keyword',
'type' => 'text',
'required' => true,
'title' => 'Insert keyword',
'exampleValue' => 'bird'
)
),
'By username' => array(
'u' => array(
'name' => 'Username',
'type' => 'text',
'required' => true,
'title' => 'Insert username (as shown in the address bar)',
'exampleValue' => 'flickr'
)
)
);
public function collectData(){
switch($this->queriedContext) {
case 'Explore':
$filter = 'photo-lite-models';
$html = getSimpleHTMLDOM(self::URI . 'explore')
or returnServerError('Could not request Flickr.');
break;
case 'By keyword':
$filter = 'photo-lite-models';
$html = getSimpleHTMLDOM(self::URI . 'search/?q=' . urlencode($this->getInput('q')) . '&s=rec')
or returnServerError('No results for this query.');
break;
case 'By username':
$filter = 'photo-models';
$html = getSimpleHTMLDOM(self::URI . 'photos/' . urlencode($this->getInput('u')))
or returnServerError('Requested username can\'t be found.');
break;
default:
returnClientError('Invalid context: ' . $this->queriedContext);
}
$model_json = $this->extractJsonModel($html);
$photo_models = $this->getPhotoModels($model_json, $filter);
foreach($photo_models as $model) {
$item = array();
/* Author name depends on scope. On a keyword search the
* author is part of the picture data. On a username search
* the author is part of the owner data.
*/
if(array_key_exists('username', $model)) {
$item['author'] = $model['username'];
} elseif (array_key_exists('owner', reset($model_json)[0])) {
$item['author'] = reset($model_json)[0]['owner']['username'];
}
$item['title'] = (array_key_exists('title', $model) ? $model['title'] : 'Untitled');
$item['uri'] = self::URI . 'photo.gne?id=' . $model['id'];
$description = (array_key_exists('description', $model) ? $model['description'] : '');
$item['content'] = '
. ')
'
. $description
. '
';
$item['enclosures'] = $this->extractEnclosures($model);
$this->items[] = $item;
}
}
private function extractJsonModel($html) {
// Find SCRIPT containing JSON data
$model = $html->find('.modelExport', 0);
$model_text = $model->innertext;
// Find start and end of JSON data
$start = strpos($model_text, 'modelExport:') + strlen('modelExport:');
$end = strpos($model_text, 'auth:') - strlen('auth:');
// Extract JSON data, remove trailing comma
$model_text = trim(substr($model_text, $start, $end - $start));
$model_text = substr($model_text, 0, strlen($model_text) - 1);
return json_decode($model_text, true);
}
private function getPhotoModels($json, $filter) {
// The JSON model contains a "legend" array, where each element contains
// the path to an element in the "main" object
$photo_models = array();
foreach($json['legend'] as $legend) {
$photo_model = $json['main'];
foreach($legend as $element) { // Traverse tree
$photo_model = $photo_model[$element];
}
// We are only interested in content
if($photo_model['_flickrModelRegistry'] === $filter) {
$photo_models[] = $photo_model;
}
}
return $photo_models;
}
private function extractEnclosures($model) {
$areas = array();
foreach($model['sizes'] as $size) {
$areas[$size['width'] * $size['height']] = $size['url'];
}
return array(max($areas));
}
private function extractContentImage($model) {
$areas = array();
$limit = 320 * 240;
foreach($model['sizes'] as $size) {
$image_area = $size['width'] * $size['height'];
if($image_area >= $limit) {
$areas[$image_area] = $size['url'];
}
}
return min($areas);
}
}