From f1a0a4d5aa28753620552df9d5e88bd983d0aca4 Mon Sep 17 00:00:00 2001
From: Sem <sembrestels@riseup.net>
Date: Sat, 25 Feb 2012 02:18:00 +0100
Subject: Added upgrade script to fetch thumbnails.

---
 start.php               | 13 +++++++++
 upgrades/2012022501.php | 70 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)
 create mode 100644 upgrades/2012022501.php

diff --git a/start.php b/start.php
index ff668f00c..07ec618a0 100644
--- a/start.php
+++ b/start.php
@@ -67,6 +67,8 @@ function videolist_init() {
 	elgg_register_action("videolist/add", "$actions_path/add.php");
 	elgg_register_action("videolist/edit", "$actions_path/edit.php");
 	elgg_register_action("videolist/delete", "$actions_path/delete.php");
+	
+	elgg_register_event_handler('upgrade', 'system', 'videolist_run_upgrades');
 }
 
 /**
@@ -262,3 +264,14 @@ function videolist_icon_url_override($hook, $type, $returnvalue, $params) {
 		return "mod/videolist/graphics/videolist_icon_{$size}.png";
 	}
 }
+
+/**
+ * Process upgrades for the videolist plugin
+ */
+function videolist_run_upgrades() {
+	$path = elgg_get_plugins_path() . 'videolist/upgrades/';
+	$files = elgg_get_upgrade_files($path);
+	foreach ($files as $file) {
+		include "$path{$file}";
+	}
+}
diff --git a/upgrades/2012022501.php b/upgrades/2012022501.php
new file mode 100644
index 000000000..815e10b62
--- /dev/null
+++ b/upgrades/2012022501.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Download the video thumbnail in the server and link it to video
+ *
+ * First determine if the upgrade is needed and then if needed, batch the update
+ */
+
+$items = elgg_get_entities(array(
+	'type' => 'object',
+	'subtype' => 'videolist_item',
+	'limit' => 5,
+	'order_by' => 'e.time_created asc',
+));
+
+// if not items, no upgrade required
+if (!$items) {
+	return;
+}
+
+// if all five of the items have empty thumbnails, we need to upgrade
+foreach ($items as $item) {
+	if ($item->thumbnail === true) {
+		return;
+	}
+}
+
+
+/**
+ * Downloads the thumbnail and saves into data folder
+ *
+ * @param ElggObject $item
+ */
+function videolist_2012022501($item) {
+
+	// do not upgrade videos that have already been upgraded
+	if ($item->thumbnail === true) {
+		return true;
+	}
+
+	$thumbnail = file_get_contents($item->thumbnail);
+	if (!$thumbnail) {
+		return false;
+	}
+	
+	$prefix = "videolist/" . $item->guid;
+	$filehandler = new ElggFile();
+	$filehandler->owner_guid = $item->owner_guid;
+	$filehandler->setFilename($prefix . ".jpg");
+	$filehandler->open("write");
+	$filehandler->write($thumbnail);
+	$filehandler->close();
+	
+	$item->thumbnail = true;
+	return true;
+}
+
+$previous_access = elgg_set_ignore_access(true);
+$options = array(
+	'type' => 'object',
+	'subtype' => 'videolist_item',
+	'limit' => 0,
+);
+$batch = new ElggBatch('elgg_get_entities', $options, 'videolist_2012022501', 100);
+elgg_set_ignore_access($previous_access);
+
+if ($batch->callbackResult) {
+	error_log("Elgg videolist upgrade (2012022501) succeeded");
+} else {
+	error_log("Elgg videolist upgrade (2012022501) failed");
+}
-- 
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