<?php
// $Id: flickr.module,v 1.43 2010-09-25 21:26:37 paulbooker Exp $

require_once(drupal_get_path('module', 'flickr') .'/flickr.inc');

/**
 * Implementation of hook_help().
 */
function flickr_help($section, $arg) {
  switch ($section) {
    case 'admin/settings/flickr':
      return t("You will need a Flickr API key to use this module. You can apply for one at <a href='@link'>@link</a>", array('@link' => url('http://www.flickr.com/services/api/keys/apply/')));
    case 'admin/help#flickr':
      return t('The flickr module uses XML-RPC to connect to Flickr\'s API and retreive photo information.');
  }
}

/**
 * Implementation of hook_perm().
 */
function flickr_perm() {
  return array(
    'view own flickr photos',
    'view all flickr photos',
    'administer flickr',
  );
}

/**
 * Implementation of hook_theme().
 */
function flickr_theme() {
  return array(
    'flickr_photo' => array(
      'arguments' => array('size' => NULL, 'format' => NULL, 'attribs' => NULL),
    ),
    'flickr_photo_box' => array(
      'arguments' => array('p', 'size' => NULL, 'format' => NULL, 'attribs' => NULL),
    ),
    'flickr_photos' => array(
      'arguments' => array('uid' => NULL, 'photos' => NULL),
    ),
    'flickr_photoset' => array(
      'arguments' => array('ps', 'owner', 'size', 'attribs' => NULL),
    ),
  );
}

/**
 * Implementation of hook_menu().
 */
function flickr_menu() {
  $items['admin/settings/flickr'] = array(
    'title' => 'Flickr',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('flickr_admin_settings'),
    'access arguments' => array('administer site configuration'),
    'description' => 'Change settings for the flickr module.',
    'file' => 'flickr.admin.inc',
  );
  $items['flickr'] = array(
    'title' => 'Flickr photos',
    'type' => MENU_CALLBACK,
    'page callback' => 'flickr_photos',
    'access callback' => TRUE,
    'description' => 'Flickr photos of default user id.',
  );
  $items['flickr/%user'] = array(
    'title callback' => 'flickr_page_title',
    'title arguments' => array(1),
    'type' => MENU_CALLBACK,
    'page callback' => 'flickr_photos',
    'page arguments' => array(1),
    'access callback' => 'flickr_photos_access',
    'access arguments' => array(1),
    'description' => 'Flickr photos of specified user.',
  );
  $items['flickr/auth'] = array(
    'type' => MENU_CALLBACK,
    'access callback' => TRUE,
    'page callback' => 'flickr_auth_callback',
  );
  return $items;
}

function flickr_photos_access($account) {
  global $user;
  $photo_access = FALSE;
  if (!empty($account) && !empty($account->uid)) {
    if (isset($account->flickr['nsid'])) {
      $photo_access = user_access('administer flickr') ||
        // Only admins can view blocked accounts
        $account->status && (
          user_access('view all flickr photos') ||
          user_access('view own flickr photos') && $user->uid == $account->uid
        );
    }
    else { // TODO: Should we display an error message?
      drupal_set_message(t('%user does not have a Flickr account', array('%user' => $account->name)), 'error');
    }
  }
  return $photo_access;
}

/**
 * Implementation of the hook_user()
 * Add an extra field for the user to enter his flickr identifier.
 */
function flickr_user($op, &$edit, &$account, $category = NULL) {
  if ($op == 'form' && (user_access('view own flickr photos') || user_access('administer flickr'))) {
    if ($category == 'account') {
      $user = user_load(array('uid' => $account->uid));
      $form['flickr'] = array(
        '#type' => 'fieldset',
        '#title' => t('Flickr settings'),
        '#collapsible' => FALSE,
        '#weight' => 4,
        '#tree' => FALSE,
      );
      $form['flickr']['flickr_identifier'] = array(
        '#type' => 'textfield',
        '#title' => t('Flickr identifier'),
        '#default_value' => empty($user->flickr['identifier']) ? '' : $user->flickr['identifier'],
        '#description' => t('Enter either your Flickr username, the email address associated with your Flickr account, or your Flickr NSID. Leave this box empty to delete your Flickr page on this site.'),
        '#maxlength' => 64,
      );
      return $form;
    }
  }
  elseif ($op == 'validate') {
    if (!empty($edit['flickr_identifier'])) {
      if (!flickr_user_find_by_identifier($edit['flickr_identifier'])) {
        form_set_error('flickr_identifier', t('%ident is not a valid Flickr username, email, or NSID.', array('%ident' => $edit['flickr_identifier'])));
      }
    }
  }
  elseif ($op == 'insert' || $op == 'update') {
    if (isset($edit['flickr_identifier'])) {
      db_query('DELETE FROM {flickr_users} WHERE uid=%d', $account->uid);
      $user_affected = db_affected_rows();
      if (!empty($edit['flickr_identifier'])) {
        db_query("INSERT INTO {flickr_users} (uid, nsid, identifier) VALUES (%d, '%s', '%s')", $account->uid, flickr_user_find_by_identifier($edit['flickr_identifier']), $edit['flickr_identifier']);
      }
      else if ($user_affected) {
        //flickr account deleted
        drupal_set_message(t("%username's Flickr page has been deleted.", array('%username' => $account->name)));
      }
    }
    $edit['flickr_identifier'] = NULL;
  }
  elseif ($op == 'load') {
    $result = db_query('SELECT * FROM {flickr_users} WHERE uid=%d', $account->uid);
    if ($flickr_info = db_fetch_object($result)) {
      $account->flickr['identifier'] = $flickr_info->identifier;
      $account->flickr['nsid'] = $flickr_info->nsid;
    }
  }
  elseif ($op == 'delete') {
    db_query('DELETE FROM {flickr_users} WHERE uid=%d', $account->uid);
  }
}

function flickr_photos($user = NULL) {
  drupal_add_css(drupal_get_path('module', 'flickr') .'/flickr.css');

  global $pager_page_array, $pager_total, $pager_total_items;
  //set this to something else if you want multiple pagers
  $element = 0;
  $pager_page_array[$element] = empty($_GET['page']) ? 0 : (int) $_GET['page'];

  if ($user === NULL) {
    $nsid = variable_get('flickr_default_userid', '');
    if (!$nsid) {
      drupal_set_message(t('No default Flickr user id has been set.'));
      return FALSE;
    }
    $uid = 0;
  }
  else {
    $account = $user; // TODO: We can just use $account as the argument
    if ($account->flickr['nsid']) { // TODO: Were actually storing the "identifier" which is potentially the $nsid
      $nsid = $account->flickr['nsid'];
    }
    else {
      drupal_set_message(t('%user does not have a Flickr account', array('%user' => $account->name)), 'error');
      return FALSE;
    }
    $uid = $account->uid;
  }

  $nsid = flickr_user_find_by_identifier($nsid);
  $photos = flickr_photos_search($nsid, $pager_page_array[$element] + 1);
  if (!$photos) {
    drupal_set_message(t('No accessible photos found for Flickr %userid', array('%userid' => $nsid)));
    return FALSE;
  }

  //set pager information we just acquired
  $pager_total[$element] = $photos['pages'];
  $pager_total_items[$element] = $photos['total'];

  return theme('flickr_photos', $uid, $photos);
}

function theme_flickr_photo($photo, $size = NULL, $format = NULL, $attributes = NULL) {
  $img = flickr_img($photo, $size, $attributes);
  $photo_url = flickr_photo_page_url($photo['owner'], $photo['id']);
  $title = is_array($photo['title']) ? $photo['title']['_content'] : $photo['title'];
  return l($img, $photo_url, array('attributes' => array('title' => $title, 'class' => 'flickr_photo'), 'absolute' => TRUE, 'html' => TRUE));

}

function theme_flickr_photo_box($photo, $size = NULL, $format = NULL, $attributes = NULL) {
  $img = flickr_img($photo, $size, $attributes);
  $title = is_array($photo['title']) ? $photo['title']['_content'] : $photo['title'];
  $photo_url = flickr_photo_page_url($photo['owner'], $photo['id']);

  $output = "<div class='flickr-photo-box'>\n";
  $output .= "<a href='$photo_url'>$img</a>";
  $output .= "<a href='$photo_url'>";
  $output .= '<div class="flickr-photo-title">'. check_plain($title) ."</div>\n";
  $output .= "</a>";
  $output .= "</div>\n";
  return $output;
}

function theme_flickr_photos($uid, $photos) {
  $output = theme('pager', NULL, variable_get('flickr_photos_per_page', 20));
  $output .= "<div class='flickr-photoset'>\n";  // TODO: is this correct ? 
  foreach ($photos['photo'] as $photo) {
    $output .= theme('flickr_photo_box', $photo, 'm');
  }
  $output .= '</div>';
  $output .= theme('pager', NULL, variable_get('flickr_photos_per_page', 20));
  return $output;
}

function theme_flickr_photoset($photoset, $owner, $size, $attributes = NULL) {
  if (module_exists('flickr_sets')) {
	$output .= "<div class='flickr-photoset'>\n";
	$photos = flickr_set_load($photoset['id']);
	foreach ((array) $photos['photoset']['photo'] as $photo) {
	  //insert owner into $photo because theme_flickr_photo needs it
	  $photo['owner'] = $owner;
	  $output .= theme('flickr_photo', $photo, $size);
	}
    $output .= '</div>';
	return $output;
  } else {
    $img = flickr_img($photoset, $size, $attributes);    
    $output = theme('pager', NULL, variable_get('flickr_photos_per_page', 20));
    $photo_url = flickr_photoset_page_url($owner, $photoset['id']);    
    $output .= "<div class='flickr-photoset'>\n";
    $title = is_array($photoset['title']) ? $photoset['title']['_content'] : $photoset['title'];   
    return l($img, $photo_url, array('attributes' => array('title' => $title), 'absolute' => TRUE, 'html' => TRUE));
  }
}

function flickr_page_title($user) {
	return 'Flickr photos - '. $user->name;
}