Implement Relive based on the MVT Pattern

1 files changed, 61 insertions, 5 deletions

diff --git a/model/Relive.php b/model/Relive.php
index 3ffdc1b..a76761c 100644
--- a/model/Relive.php
+++ b/model/Relive.php
@@ -2,9 +2,18 @@
 
 class Relive extends ModelBase
 {
-	function relive_talks()
+	public function isEnabled()
 	{
-		$talks = @file_get_contents(get('OVERVIEW.RELIVE_JSON'));
+		// having CONFERENCE.RELIVE is not enough!
+		return $this->has('CONFERENCE.RELIVE_JSON');
+	}
+
+	public function getTalks()
+	{
+		if($talks_by_id = $this->getCached())
+			return $talks_by_id;
+
+		$talks = file_get_contents($this->get('CONFERENCE.RELIVE_JSON'));
 		$talks = utf8_decode($talks);
 		$talks = (array)json_decode($talks, true);
 
@@ -14,11 +23,58 @@ class Relive extends ModelBase
 		});
 
 		$talks_by_id = array();
-		foreach ($talks as $value)
+		foreach ($talks as $talk)
 		{
-			$talks_by_id[$value['id']] = $value;
+			if($talk['status'] == 'released')
+				$talk['url'] = $talk['release_url'];
+			else
+				$talk['url'] = 'relive/'.rawurlencode($talk['id']).'/';
+
+			$talks_by_id[$talk['id']] = $talk;
 		}
 
-		return $talks_by_id;
+		return $this->doCache($talks_by_id);
+	}
+
+	public function getTalk($id)
+	{
+		$talks = $this->getTalks();
+		if(!isset($talks[$id]))
+			throw new NotFoundException('Relive-Talk id '.$id);
+
+		return $talks[$id];
+	}
+
+	private function isCacheEnabled()
+	{
+		return $this->has('CONFERENCE.RELIVE_JSON_CACHE') && function_exists('apc_fetch') && function_exists('apc_store');
+	}
+
+	private function getCacheDuration()
+	{
+		return $this->get('CONFERENCE.RELIVE_JSON_CACHE', 60*10 /* 10 minutes */);
+	}
+
+	private $localCache = null;
+	private function getCached()
+	{
+		if($this->localCache)
+			return $this->localCache;
+
+		if(!$this->isCacheEnabled())
+			return null;
+
+		return apc_fetch('RELIVE.CACHE');
+	}
+
+	private function doCache($value)
+	{
+		$this->localCache = $value;
+
+		if(!$this->isCacheEnabled())
+			return $value;
+
+		apc_store('RELIVE.CACHE', $value, $this->getCacheDuration());
+		return $value;
 	}
 }