Sort photos by filename and make that default

First off -this is a great module and by far the best photo album module for Drupal. Many thanks to eastcn for developing and maintaining this.

It's also great that there are now new ways to sort the photo display order (timestamp, weight, filesize, comments, votes) in both (ascending, descending) order.

However, I wanted to have the pictures be sorted chronologically i.e. first picture taken appears first. This requires EXIF information, and was way beyond my skill level to attempt. I settled for the next best thing : sort by filename. In most cases sorting photos by filename in ascending order will result in chronological order. I was able to accomplish this by applying the following patch to photos.module.

--- photos.module       2009-12-29 20:35:18.000000000 -0700
+++ photos.module.new   2010-04-10 18:25:01.000000000 -0600
@@ -459,7 +459,7 @@
     case 1:
       return $node->album['cover']['view'];
     case 2:
-      $order = explode('|', ($node->album['imageorder'] ? $node->album['imageorder'] : variable_get('photos_display_imageorder', 'timestamp|desc')));
+      $order = explode('|', ($node->album['imageorder'] ? $node->album['imageorder'] : variable_get('photos_display_imageorder', 'filename|asc')));
       $order = _photos_order_value_change($order[0], $order[1]);
       $limit = $node->album[$type.'_viewnum'] ? $node->album[$type.'_viewnum'] :variable_get('photos_display_'.$type.'_viewnum', 10);
       $result = db_query_range('SELECT f.filepath, f.filemime, f.timestamp, f.filename, f.filesize, u.uid, u.name, p.* FROM {files} f INNER JOIN {x_image} p ON f.fid = p.fid INNER JOIN {users} u ON f.uid = u.uid WHERE p.pid = %d'. $order, $node->nid, 0, $limit);
@@ -1484,7 +1484,7 @@
 }
 
 function _photos_order_value_change($field, $sort){
-  $array = array('weight' => 'p.wid', 'timestamp' => 'f.fid', 'comments' => 'p.comcount', 'visits' => 'p.count', 'filesize' => 'f.filesize');
+  $array = array('filename' => 'f.filename', 'weight' => 'p.wid', 'timestamp' => 'f.fid', 'comments' => 'p.comcount', 'visits' => 'p.count', 'filesize' => 'f.filesize');
   $array1 = array('desc' => 'desc', 'asc' => 'asc');
   if($array[$field] && $array1[$sort]){
     return " ORDER BY $array[$field] $array1[$sort]". ($array[$field] != 'f.fid' ? ', f.fid DESC' : NULL);
@@ -1501,6 +1501,7 @@
 
 function _photos_order_link($arg, $count = 0, $link = 0, $limit = 0){
   $field = array(
+    'filename' => t('By filename'),
     'weight' => t('By weight'),
     'timestamp' => t('By time'),
     'comments' => t('By comments '),
@@ -1539,6 +1540,8 @@
 
 function _photos_order_label(){
   return array(
+    'filename|desc' => t('Filename - descending'),
+    'filename|asc' => t('Filename - ascending'),
     'timestamp|desc' => t('Date - newest first'),
     'timestamp|asc' => t('Date - oldest first'),
     'weight|desc' => t('Weight - smallest first'),
@@ -1670,4 +1673,4 @@

Then modify all instances of this string "timestamp|desc" to "filename|asc" in inc/photos.admin.inc, inc/photos.album.inc, inc/photos.data.inc, inc/photos.form.inc. This makes the filename sort become default.

I then modified photos.css to hide the sort ability from the average user, using display:none; I'm sure this can be done using the tpl files as well.

--- photos.css  2009-03-10 20:37:43.000000000 -0600
+++ photos.css.new      2010-04-10 18:29:04.000000000 -0600
+.photos_list_view_info, .photos_album_links {
+ display: none;
 }
 .photos_view_des, .photos_view_filename, .photos_list_view_des, .photos_list_view_filename{
+ display: none;
   margin:4px 0;
   padding:5px 8px;
 }

I hope this is useful to someone...