Feature 660 added: creation date of tthe category images can be displayed

next to category title in subcatify mode. The feature was implemented in a
very simple way that must be improved in display, performance and
recursivity.


git-svn-id: http://piwigo.org/svn/trunk@1970 68402e56-0260-453c-a942-63ccdbb3a9ee

include/category_cats.inc.php

@@ -77,6 +77,7 @@ SELECT
 
 $result = pwg_query($query);
 $categories = array();
+$category_ids = array();
 $image_ids = array();
 
 while ($row = mysql_fetch_assoc($result))
@@ -146,10 +147,38 @@ SELECT representative_picture_id
     $row['representative_picture_id'] = $image_id;
     array_push($image_ids, $image_id);
     array_push($categories, $row);
+    array_push($category_ids, $row['id']);
   }
   unset($image_id);
 }
 
+if ($conf['display_fromto'])
+{
+  $dates_of_category = array();
+  if (count($category_ids) > 0)
+  {
+    $query = '
+SELECT
+    category_id,
+    MIN(date_creation) AS date_creation_min,
+    MAX(date_creation) AS date_creation_max
+  FROM '.IMAGE_CATEGORY_TABLE.'
+    INNER JOIN '.IMAGES_TABLE.' ON image_id = id
+  WHERE category_id IN ('.implode(',', $category_ids).') 
+  GROUP BY category_id
+;';
+    $result = pwg_query($query);
+    while ($row = mysql_fetch_array($result))
+    {
+      $dates_of_category[ $row['category_id'] ] = array(
+        'from' => $row['date_creation_min'],
+        'to'   => $row['date_creation_max'],
+        );
+    }
+    // echo '<pre>'; print_r($dates_of_category); echo '</pre>';
+  }
+}
+
 if ($page['section']=='recent_cats')
 {
   usort($categories, 'global_rank_compare');
@@ -221,7 +250,41 @@ if (count($categories) > 0)
           'NAME'  => $name,
           )
         );
+
+      if ($conf['display_fromto'])
+      {
+        if (isset($dates_of_category[ $category['id'] ]))
+        {
+          $from = $dates_of_category[ $category['id'] ]['from'];
+          $to   = $dates_of_category[ $category['id'] ]['to'];
         
+          if (!empty($from))
+          {
+            $info = '';
+          
+            if ($from == $to)
+            {
+              $info = format_date($from);
+            }
+            else
+            {
+              $info = sprintf(
+                l10n('from %s to %s'),
+                format_date($from),
+                format_date($to)
+                );
+            }
+
+            $template->assign_block_vars(
+              'categories.category.dates',
+              array(
+                'INFO' => $info,
+                )
+              );
+          }
+        }
+      }
+
       //plugins need to add/modify sth in this loop ?
       trigger_action('loc_index_category_thumbnail',
         $category, 'categories.category' );

include/config_default.inc.php

@@ -234,6 +234,10 @@ $conf['show_picture_name_on_title'] = true;
 // than thumbnails representing a picture.
 $conf['subcatify'] = true;
 
+// display_fromto: in subcatify mode, display the date creation bounds of a
+// category.
+$conf['display_fromto'] = false;
+
 // allow_random_representative : do you wish PhpWebGallery to search among
 // categories elements a new representative at each reload ?
 //

template/yoga/mainpage_categories.tpl

@@ -14,6 +14,9 @@
           <a href="{categories.category.URL}">{categories.category.NAME}</a>
           {categories.category.ICON}
         </h3>
+        <!-- BEGIN dates -->
+        <p>{categories.category.dates.INFO}</p>
+        <!-- END dates -->
         <p>{categories.category.CAPTION_NB_IMAGES}</p>
         <p>{categories.category.DESCRIPTION}&nbsp;</p>
       </div>