From 0b49e16cae2162fa708ff150fbd2c873b6201c6c Mon Sep 17 00:00:00 2001
From: Laurent Monin <zas@norz.org>
Date: Thu, 11 Jun 2015 14:00:12 +0200
Subject: [PATCH] mblinks: when loading the cache, clear expired entries

---
 lib/mblinks.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/mblinks.js b/lib/mblinks.js
index 802ec13..c8c1325 100644
--- a/lib/mblinks.js
+++ b/lib/mblinks.js
@@ -83,6 +83,8 @@ var MBLinks = function (cachekey, expiration) {
     if (!this.supports_local_storage) return;
     // Check if we already added links for this content
     this.cache = JSON.parse(localStorage.getItem(this.cache_key) || '{}');
+    // remove old entries
+    this.clearCacheExpired();
   };
 
   this.saveCache = function () {
@@ -94,6 +96,22 @@ var MBLinks = function (cachekey, expiration) {
     }
   };
 
+  this.clearCacheExpired = function() {
+    //var old_cache_entries = Object.keys(this.cache).length;
+    //console.log("clearCacheExpired " + old_cache_entries);
+    var now = new Date().getTime();
+    var new_cache = {};
+    var that = this;
+    $.each(this.cache, function (key, value) {
+      if (that.is_cached(key)) {
+        new_cache[key] = that.cache[key];
+      }
+    });
+    //var new_cache_entries = Object.keys(new_cache).length;
+    //console.log("Cleared cache entries: " + old_cache_entries + ' -> ' + new_cache_entries);
+    this.cache = new_cache;
+  };
+
   this.is_cached = function (url) {
     return (this.cache[url] && this.expirationMinutes > 0 && new Date().getTime() < this.cache[url].timestamp + this.expirationMinutes*60*1000);
   };