feature 1505: when there is no photo yet in the gallery, displays a big and

obvious message, guiding to the Administration>Images>Add page.

git-svn-id: http://piwigo.org/svn/trunk@5138 68402e56-0260-453c-a942-63ccdbb3a9ee

include/common.inc.php

@@ -165,6 +165,41 @@ else
   $template = new Template(PHPWG_ROOT_PATH.'themes', $user['theme'] );
 }
 
+// The "No Photo Yet" feature: if you have no photo yet in your gallery, the
+// gallery displays only a big box to show you the way for adding your first
+// photos
+if (
+  !isset($conf['no_photo_yet'])             // the message disappears at first photo
+  and !(defined('IN_ADMIN') and IN_ADMIN)   // no message inside administration
+  and script_basename() != 'identification' // keep the ability to login
+  )
+{
+  $query = '
+SELECT
+    COUNT(*)
+  FROM '.IMAGES_TABLE.'
+;';
+  list($nb_photos) = pwg_db_fetch_row(pwg_query($query));
+  if (0 == $nb_photos)
+  {
+    $template->set_filenames(array('no_photo_yet'=>'no_photo_yet.tpl'));
+
+    $url = $conf['no_photo_yet_url'];
+    if (substr($url, 0, 4) != 'http')
+    {
+      $url = get_root_url().$url;
+    }
+    
+    $template->assign(array('next_step_url' => $url));
+    $template->pparse('no_photo_yet');
+    exit();
+  }
+  else
+  {
+    conf_update_param('no_photo_yet', 'false');
+  }
+}
+
 if (isset($user['internal_status']['guest_must_be_guest'])
     and
     $user['internal_status']['guest_must_be_guest'] === true)

include/config_default.inc.php

@@ -765,4 +765,7 @@ $conf['local_data_dir'] = dirname(dirname(__FILE__)).'/_data';
 
 // where should the API add photos?
 $conf['upload_dir'] = PHPWG_ROOT_PATH.'upload';
+
+// where should the user be guided when there is no photo in his gallery yet?
+$conf['no_photo_yet_url'] = 'admin.php?page=photos_add';
 ?>

include/functions.inc.php

@@ -1060,6 +1060,24 @@ SELECT param, value
   }
 }
 
+function conf_update_param($param, $value)
+{
+  $query = '
+DELETE
+  FROM '.CONFIG_TABLE.'
+  WHERE param = "'.$param.'"
+;';
+  pwg_query($query);
+
+  $query = '
+INSERT
+  INTO '.CONFIG_TABLE.'
+  SET param = "'.$param.'"
+    , value = "'.$value.'"
+;';
+  pwg_query($query);
+}
+
 /**
  * Prepends and appends a string at each value of the given array.
  *