flickr.inc in Media: Flickr 6

This include processes flickr.com image files for use by emfield.module.

File

providers/emimage/flickr.inc

<?php

/**
 * @file
 * This include processes flickr.com image files for use by emfield.module.
 */
define('EMIMAGE_FLICKR_MAIN_URL', 'https://www.flickr.com/');
define('EMIMAGE_FLICKR_API_INFO', 'https://flickr.com/services/api');
define('EMIMAGE_FLICKR_API_APPLICATION_URL', 'https://www.flickr.com/services/api/keys');
define('EMIMAGE_FLICKR_REST_ENDPOINT', 'https://api.flickr.com/services/rest/');
define('EMIMAGE_FLICKR_DATA_VERSION', 1);

/**
 * hook emimage_PROVIDER_info
 * this returns information relevant to a specific 3rd party video provider
 * @return
 *   an array of strings requested by various admin and other forms
 *   'name' => the translated name of the provider
 *   'url' => the url to the main page for the provider
 *   'settings_description' => a description of the provider that will be posted in the admin settings form
 *   'supported_features' => an array of rows describing the state of certain supported features by the provider.
 *      These will be rendered in a table, with the columns being 'Feature', 'Supported', 'Notes'.
 */
function emimage_flickr_info() {
  $name = t('Flickr');
  $features = array(
    array(
      t('Import photosets'),
      t('Yes'),
      t('If you have the Embedded Media Import module activated, you may allow @name photosets to be imported into content.', array(
        '@name' => $name,
      )),
    ),
  );
  return array(
    'provider' => 'flickr',
    'name' => t('Flickr'),
    'url' => EMIMAGE_FLICKR_MAIN_URL,
    'settings_description' => t('These settings specifically affect images displayed from <a href="@flickr" target="_blank">Flickr</a>.', array(
      '@flickr' => EMIMAGE_FLICKR_MAIN_URL,
    )),
    'supported_features' => $features,
    'import_sets_word' => t('photosets'),
  );
}

/**
 *  This allows flickr photosets to be imported into nodes
 */
function emimage_flickr_import($url, $limit = 0, $page = 0) {
  $codes = array();

  // http://www.flickr.com/photos/nikkiana/sets/72157601948647678/
  if (preg_match('@flickr\\.com/photos/([^/]*)/([^/]*)/([^/]*)/@i', $url, $matches)) {
    $page++;

    // flickr starts current page at 1
    $codes['#matches'] = $matches;
    $args = array(
      'photoset_id' => $matches[3],
    );
    if ($limit) {
      $args['per_page'] = $limit;
    }
    $args['page'] = $page;
    $xml = emimage_flickr_request('flickr.photosets.getPhotos', $args);
    $codes['#pages'] = $xml['photoset']['pages'];
    $codes['#page'] = $xml['photoset']['page'] - 1;
    $codes['#total'] = $xml['photoset']['total'];
    $codes['#per_page'] = $xml['photoset']['per_page'];
    $codes['#set'] = array();
    foreach ($xml['photoset']['photo'] as $photo) {
      $data = emimage_flickr_data(NULL, array(
        'value' => $photo['id'],
      ));
      $codes['#set'][] = array(
        '#code' => $photo['id'],
        '#title' => $photo['title'],
        '#link' => emimage_flickr_embedded_link($photo['id'], $xml['photoset']['owner']),
        '#thumb' => emimage_flickr_image_url($photo['id'], 100, 100, NULL, NULL, NULL),
        '#body' => $data['description'],
        '#tags' => $data['tags'],
      );
    }

    /*
        $data['owner'] = $xml['photo']['owner']['nsid'];
        $data['title'] = $xml['photo']['title']['_content'];*/
  }
  return $codes;
}

/**
 * hook emimage_PROVIDER_settings
 * this should return a subform to be added to the emimage_settings() admin settings page.
 * note that a form field will already be provided, at $form['PROVIDER'] (such as $form['flickr'])
 * so if you want specific provider settings within that field, you can add the elements to that form field.
 */
function emimage_flickr_settings() {
  $form['flickr']['api'] = array(
    '#type' => 'fieldset',
    '#title' => t('Flickr API'),
    '#description' => t('You will first need to apply for an API Developer Key from the <a href="@flickr" target="_blank">Flickr Developer Profile page</a>.', array(
      '@flickr' => EMIMAGE_FLICKR_API_APPLICATION_URL,
    )),
    '#collapsible' => TRUE,
    '#collapsed' => variable_get('emimage_flickr_api_key', '') != '',
  );
  $form['flickr']['api']['emimage_flickr_api_key'] = array(
    '#type' => 'textfield',
    '#title' => t('Flickr API Key'),
    '#default_value' => variable_get('emimage_flickr_api_key', ''),
    '#description' => t('Please enter your Flickr Developer Key here.'),
  );
  $form['flickr']['api']['emimage_flickr_api_secret'] = array(
    '#type' => 'textfield',
    '#title' => t('Flickr API Secret'),
    '#default_value' => variable_get('emimage_flickr_api_secret', ''),
    '#description' => t('If you have a secret for the Flickr API, enter it here.'),
  );
  return $form;
}

/**
 * this is a wrapper for emimage_request_xml that includes flickr's api key
 */
function emimage_flickr_request($method, $args = array(), $cached = TRUE) {

  // display an error if we don't have an api key yet
  emimage_flickr_error_check();
  $args['api_key'] = trim(variable_get('emimage_flickr_api_key', ''));
  if ($secret = trim(variable_get('emimage_flickr_api_secret', ''))) {
    $args['secret'] = md5($secret . $arghash);
  }
  $args['method'] = $method;
  $args['format'] = 'php_serial';
  $xml = module_invoke('emfield', 'request_xml', 'flickr', EMIMAGE_FLICKR_REST_ENDPOINT, $args, $cached, FALSE, FALSE, TRUE);
  return $xml;
}

/**
 *  Implement hook emvideo_PROVIDER_data_version().
 */
function emimage_flickr_data_version() {
  return EMIMAGE_FLICKR_DATA_VERSION;
}
function emimage_flickr_data($field, $item) {
  $data = array();

  // use the page id, since we'll have that in most cases (except in embed pastes, which gets parsed during extraction)
  // we use this to get an rss feed w/ all the info for the video. interesting reading ;)
  $xml = emimage_flickr_request('flickr.photos.getInfo', array(
    'photo_id' => $item['value'],
  ));
  $data['owner'] = $xml['photo']['owner']['nsid'];
  $data['title'] = $xml['photo']['title']['_content'];
  $data['description'] = $xml['photo']['description']['_content'];
  $data['tags'] = array();
  if (is_array($xml['photo']['tags']['tag'])) {
    foreach ($xml['photo']['tags']['tag'] as $tag) {
      $data['tags'][] = $tag['raw'];
    }
  }

  // Store the dimensions of the largest image so we can scale it correctly at display-time
  $width = 0;
  $height = 0;
  $xml = emimage_flickr_request('flickr.photos.getSizes', array(
    'photo_id' => $item['value'],
  ));
  foreach ($xml["sizes"]["size"] as $size) {

    // Ignore the Square size, as that doesn't give us the true aspect ratio
    if ($size["label"] != "Square") {
      if ((int) $size["width"] > $width) {
        $width = (int) $size["width"];
        $height = (int) $size["height"];
      }
    }
  }
  if ($width > 0) {
    $data['width'] = $width;
    $data['height'] = $height;
  }
  $data['emimage_data_version'] = EMIMAGE_FLICKR_DATA_VERSION;
  return $data;
}

/**
 *  This will log an error if we don't have a key yet. In addition, if the user is an admin, we'll display an error.
 */
function emimage_flickr_error_check() {
  static $checked;
  if (!$checked && variable_get('emimage_flickr_api_key', '') == '') {
    global $user;
    $error = t('You do not yet have a Flickr API key set. You will need to <a href="@apply" target="_blank">apply for a Flickr API key</a> and enter your key at the <a href="@settings">settings administration page</a> before Flickr images may be displayed.', array(
      '@apply' => EMIMAGE_FLICKR_API_APPLICATION_URL,
      '@settings' => url('admin/content/emfield'),
    ));
    if (user_access('administer site configuration')) {
      drupal_set_message($error, 'error');
    }
    watchdog('Embedded Media Field', '!error', array(
      '!error' => $error,
    ));
  }
  $checked = TRUE;
}
function emimage_flickr_extract($embed = '') {

  // http://flickr.com/photos/96898796@N00/194727976/
  return array(
    '@flickr\\.com/photos/[^/]*/(\\d+)@i',
  );
}

/**
 * hook emimage_PROVIDER_embedded_link($code)
 * returns a link to view the content at the provider's site
 *  @param $code
 *    the string containing the content to watch
 *  @return
 *    a string containing the URL to view the video at the original provider's site
 */
function emimage_flickr_embedded_link($code, $data = array()) {
  if ($data['owner']) {
    $owner = $data['owner'];
  }
  else {
    $xml = emimage_flickr_request('flickr.photos.getInfo', array(
      'photo_id' => $code,
    ));
    $owner = $xml['photo']['owner']['nsid'];
  }
  return 'https://www.flickr.com/photos/' . $owner . '/' . $code;
}

/**
 *  Implements emimage_PROVIDER_image_url.
 *
 *  @param $code
 *    The provider code of the image.
 *  @param $width
 *  @param $height
 *    The dimensions of the photo to display.
 *  @return
 *    The url directly to the image to display.
 */
function emimage_flickr_image_url($code, $width, $height, $formatter = NULL, $field = NULL, $item = NULL, $node = NULL) {
  if ($code) {
    $size = _emimage_flickr_guess_size($width, $height);
    $getsize = emimage_flickr_request('flickr.photos.getSizes', array(
      'photo_id' => $code,
    ));

    // For small images, there may not be the sizes 0..4 that
    // _emimage_flickr_guess_size assumes, so:
    $size = min($size, count($getsize['sizes']['size']) - 1);
    $url = $getsize['sizes']['size'][$size]['source'];
  }
  return $url;
}

/**
 *  Implements emimage_PROVIDER_image_title.
 *
 *  @param $code
 *    The provider code of the image.
 *  @param $data
 *    Any stored data for the image, which may already have the title.
 *  @return
 *    The title as the 3rd party provider knows it, if accessible to us. otherwise, ''.
 */
function emimage_flickr_image_title($code, $data) {
  if ($data['title']) {
    return $data['title'];
  }
  $photo = emimage_flickr_request('flickr.photos.getInfo', array(
    'photo_id' => $code,
  ));
  return $photo['photo']['title']['_content'] ? $photo['photo']['title']['_content'] : '';
}

/**
 *  Helper function for emimage_flickr_image_url.
 *  This will return the appropriate array key for the image size we wish.
 */
function _emimage_flickr_guess_size($width, $height) {
  $max = max($width, $height);
  if ($max) {
    foreach (array(
      '0' => 75,
      '1' => 100,
      '2' => 240,
      '3' => 500,
      '4' => 1024,
    ) as $size => $value) {
      if ($max <= $value) {
        return $size;
      }
    }
  }

  // If we don't have width or height set, then get the original size.
  return '5';
}
function emimage_flickr_thumbnail($field, $item, $formatter, $node, $width, $height) {

  // As this is called by emthumb to grab the original size when available,
  // for later use w/ imagecache, we'll try to grab an intentionally large
  // image, at 4800x4800.
  return emimage_flickr_image_url($item['value'], 4800, 4800, $formatter, $field, $item, $node);
}

Functions

Name	Description
emimage_flickr_data
emimage_flickr_data_version	Implement hook emvideo_PROVIDER_data_version().
emimage_flickr_embedded_link	hook emimage_PROVIDER_embedded_link($code) returns a link to view the content at the provider's site
emimage_flickr_error_check	This will log an error if we don't have a key yet. In addition, if the user is an admin, we'll display an error.
emimage_flickr_extract
emimage_flickr_image_title	Implements emimage_PROVIDER_image_title.
emimage_flickr_image_url	Implements emimage_PROVIDER_image_url.
emimage_flickr_import	This allows flickr photosets to be imported into nodes
emimage_flickr_info	hook emimage_PROVIDER_info this returns information relevant to a specific 3rd party video provider
emimage_flickr_request	this is a wrapper for emimage_request_xml that includes flickr's api key
emimage_flickr_settings	hook emimage_PROVIDER_settings this should return a subform to be added to the emimage_settings() admin settings page. note that a form field will already be provided, at $form['PROVIDER'] (such as $form['flickr']) so if you want…
emimage_flickr_thumbnail
_emimage_flickr_guess_size	Helper function for emimage_flickr_image_url. This will return the appropriate array key for the image size we wish.

Constants

Name	Description
EMIMAGE_FLICKR_API_APPLICATION_URL
EMIMAGE_FLICKR_API_INFO
EMIMAGE_FLICKR_DATA_VERSION
EMIMAGE_FLICKR_MAIN_URL	@file This include processes flickr.com image files for use by emfield.module.
EMIMAGE_FLICKR_REST_ENDPOINT