Add a maintenace task to extract the EXIF data from images

Changed exif to EXIF in comments

3 files changed, 71 insertions, 2 deletions

diff --git a/modules/exif/controllers/exif.php b/modules/exif/controllers/exif.php
index 88e4a8b0..d46d6083 100644
--- a/modules/exif/controllers/exif.php
+++ b/modules/exif/controllers/exif.php
@@ -19,7 +19,7 @@
  */
 class Exif_Controller extends Controller {
   /**
-   * Display the Exif data an existing comment.
+   * Display the EXIF data for an item.
    */
   public function show($item_id) {
     $item = ORM::factory("item", $item_id);
diff --git a/modules/exif/helpers/exif.php b/modules/exif/helpers/exif.php
index 61084b15..ee128353 100644
--- a/modules/exif/helpers/exif.php
+++ b/modules/exif/helpers/exif.php
@@ -26,7 +26,7 @@ class exif_Core {
   protected static $exif_keys;
   
   public static function extract($item) {
-    // Only try to extract exif from photos
+    // Only try to extract EXIF from photos
     if ($item->is_photo() && $item->mime_type == "image/jpeg") {
       require_once(MODPATH . "exif/lib/exif.php");
       $exif_raw = read_exif_data_raw($item->file_path(), false);
diff --git a/modules/exif/helpers/exif_task.php b/modules/exif/helpers/exif_task.php
new file mode 100644
index 00000000..f430d185
--- /dev/null
+++ b/modules/exif/helpers/exif_task.php
@@ -0,0 +1,69 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class exif_task_Core {
+  static function available_tasks() {
+    list ($remaining, $total, $percent) = self::_get_stats();
+    return array(Task_Definition::factory()
+                 ->callback("exif_task::extract_exif")
+                 ->name(t("Extract EXIF data"))
+                 ->description($remaining ?
+                               sprintf(t("EXIF data is available for %d%% of the images"), $percent)
+                               : t("EXIF data is up-to-date"))
+                 ->severity($remaining ? log::WARNING : log::SUCCESS));
+  }
+
+  static function extract_exif($task) {
+    $completed = $task->get("completed", 0);
+
+    $work = ORM::factory("item")
+      ->join("exif_keys", "items.id", "item_id", "LEFT")
+      ->where("items.type", "photo")
+      ->where("exif_keys.id", null)
+      ->find();
+    exif::extract($work);
+    $completed++;
+
+    $task->set("completed", $completed);
+
+    list ($remaining, $total, $percent) = self::_get_stats();
+    $task->percent_complete = round(100 * $completed / ($remaining + $completed));
+
+    $task->status = t("%done records records updated, index is %percent% up-to-date",
+                      array("done" => $completed, "percent" => $percent));
+
+    if ($remaining == 0) {
+      $task->done = true;
+      $task->state = "success";
+    }
+  }
+
+  private static function _get_stats() {
+    $exif_count = ORM::factory("exif_key")
+      ->select("DISTINCT item_id")
+      ->find_all()
+      ->count();
+
+    $items_count = ORM::factory("item")
+      ->where("type", "photo")
+      ->count_all();
+    return array($exif_count -  $items_count, $items_count,
+                 round(100 * ($exif_count / $items_count)));
+  }
+}