pregen_flickr

<?php /* vim: set noet ts=4 sw=4 ft=php: : */

define('FLICKR_GROUP_ID',    '610963@N20');
define('FLICKR_REST_URL',    'http://api.flickr.com/services/rest/');
define('FLICKR_REST_METHOD', 'flickr.groups.pools.getPhotos');
define('FLICKR_REST_FORMAT', 'json');

function pregen_flickr($apiKey, $outputPath, $limit = 100)
{
    // ensure caller specified a place to write to.
    $outputPath = rtrim($outputPath, '/');
    if (!$outputPath) {
        trigger_error("No flickr output directory specified.", E_USER_WARNING);
        return;
    }

    // ensure path exists and is writable.
    if (!is_dir($outputPath)) {
        if (!@mkdir($outputPath, 0755)) {
            trigger_error("Can't create flickr output directory: $outputPath", E_USER_WARNING);
            return;
        }
    }
    if (!is_writable($outputPath)) {
        if (!@chmod($outputPath, 0755)) {
            trigger_error("Can't make flickr output directory writable: $outputPath", E_USER_WARNING);
            return;
        }
    }

    // construct flickr api call
    // extras is set to 'url_sq' to get the href of the square thumbnail.
    // see http://www.flickr.com/services/api/flickr.groups.pools.getPhotos.html
    $url = FLICKR_REST_URL . '?' . http_build_query(array(
        'api_key'        => $apiKey,
        'per_page'       => $limit,
        'extras'         => 'url_sq',
        'group_id'       => FLICKR_GROUP_ID,
        'method'         => FLICKR_REST_METHOD,
        'format'         => FLICKR_REST_FORMAT,
        'nojsoncallback' => 1
    ));

    // fetch photo info
    $response = file_get_contents($url);
    $decoded  = json_decode($response, true);
    $photos   = $decoded['photos']['photo'];

    // write out the photo info.
    file_put_contents($outputPath . '/photos.json', $response);

    // fetch all of the photos
    foreach ($photos as $photo) {
        file_put_contents(
            $outputPath . '/' . basename($photo['url_sq']),
            file_get_contents($photo['url_sq'])
        );
    }
}