imagecache: allow to clean the image cache through General Configuration tab

src/api/api_imagecache.c

@@ -43,9 +43,13 @@ static int
 api_imagecache_save
   ( access_t *perm, void *opaque, const char *op, htsmsg_t *args, htsmsg_t **resp )
 {
+  int b;
+
   pthread_mutex_lock(&global_lock);
   if (imagecache_set_config(args))
     imagecache_save();
+  if (!htsmsg_get_bool(args, "clean", &b) && b)
+    imagecache_clean();
   pthread_mutex_unlock(&global_lock);
   *resp = htsmsg_create_map();
   htsmsg_add_u32(*resp, "success", 1);

src/imagecache.c

@@ -163,7 +163,7 @@ imagecache_image_fetch ( imagecache_image_t *img )
   pthread_mutex_unlock(&global_lock);
 
   /* Build command */
-  tvhlog(LOG_DEBUG, "imagecache", "fetch %s", img->url);
+  tvhdebug("imagecache", "fetch %s", img->url);
   memset(&url, 0, sizeof(url));
   if (urlparse(img->url, &url)) {
     tvherror("imagecache", "Unable to parse url '%s'", img->url);
@@ -219,12 +219,13 @@ error:
     img->failed = 1;
     if (tmp[0])
       unlink(tmp);
-    tvhlog(LOG_WARNING, "imagecache", "failed to download %s", img->url);
+    tvhwarn("imagecache", "failed to download %s", img->url);
   } else {
     img->failed = 0;
     unlink(path);
-    rename(tmp, path);
-    tvhlog(LOG_DEBUG, "imagecache", "downloaded %s", img->url);
+    if (rename(tmp, path))
+      tvherror("imagecache", "unable to rename file '%s' to '%s'", tmp, path);
+    tvhdebug("imagecache", "downloaded %s", img->url);
   }
   imagecache_image_save(img);
   pthread_cond_broadcast(&imagecache_cond);
@@ -361,6 +362,23 @@ imagecache_init ( void )
 #endif
 }
 
+
+/*
+ * Destroy
+ */
+static void
+imagecache_destroy ( imagecache_image_t *img, int delconf )
+{
+  if (delconf) {
+    hts_settings_remove("imagecache/meta/%d", img->id);
+    hts_settings_remove("imagecache/data/%d", img->id);
+  }
+  RB_REMOVE(&imagecache_by_url, img, url_link);
+  RB_REMOVE(&imagecache_by_id, img, id_link);
+  free((void *)img->url);
+  free(img);
+}
+
 /*
  * Shutdown
  */
@@ -373,12 +391,8 @@ imagecache_done ( void )
   pthread_cond_broadcast(&imagecache_cond);
   pthread_join(imagecache_tid, NULL);
 #endif
-  while ((img = RB_FIRST(&imagecache_by_url)) != NULL) {
-    RB_REMOVE(&imagecache_by_url, img, url_link);
-    RB_REMOVE(&imagecache_by_id, img, id_link);
-    free((void *)img->url);
-    free(img);
-  }
+  while ((img = RB_FIRST(&imagecache_by_id)) != NULL)
+    imagecache_destroy(img, 0);
   SKEL_FREE(imagecache_skel);
 }
 
@@ -419,6 +433,52 @@ imagecache_save ( void )
   notify_reload("imagecache");
 }
 
+/*
+ * Clean
+ */
+void
+imagecache_clean( void )
+{
+  imagecache_image_t *img, *next, skel;
+  fb_dirent **namelist;
+  char path[PATH_MAX], *name;
+  int i, n;
+
+  lock_assert(&global_lock);
+
+#if ENABLE_IMAGECACHE
+  /* remove all cached data, except the one actually fetched */
+  for (img = RB_FIRST(&imagecache_by_id); img; img = next) {
+    next = RB_NEXT(img, id_link);
+    if (img->state == FETCHING)
+      continue;
+    imagecache_destroy(img, 1);
+  }
+#endif
+
+  tvhinfo("imagecache", "clean request");
+  /* remove unassociated data*/
+  if (hts_settings_buildpath(path, sizeof(path), "imagecache/data")) {
+    tvherror("imagecache", "clean - buildpath");
+    return;
+  }
+  if((n = fb_scandir(path, &namelist)) < 0)
+    return;
+  for (i = 0; i < n; i++) {
+    name = namelist[i]->name;
+    if (name[0] == '.')
+      continue;
+    skel.id = atoi(name);
+    img = RB_FIND(&imagecache_by_id, &skel, id_link, id_cmp);
+    if (img)
+      continue;
+    tvhinfo("imagecache", "clean: removing unassociated file '%s/%s'", path, name);
+    hts_settings_remove("imagecache/meta/%s", name);
+    hts_settings_remove("imagecache/data/%s", name);
+  }
+  free(namelist);
+}
+
 #endif /* ENABLE_IMAGECACHE */
 
 /*

src/imagecache.h

@@ -39,6 +39,7 @@ void	 imagecache_done     ( void );
 htsmsg_t *imagecache_get_config ( void );
 int       imagecache_set_config ( htsmsg_t *c );
 void      imagecache_save       ( void );
+void      imagecache_clean      ( void );
 
 // Note: will return 0 if invalid (must serve original URL)
 uint32_t imagecache_get_id  ( const char *url );

src/webui/static/app/config.js

@@ -221,6 +221,13 @@ tvheadend.miscconf = function(panel, index) {
         handler: saveChanges
     });
 
+    var imagecacheButton = new Ext.Button({
+        text: "Clean image (icon) cache",
+        tooltip: 'Clean image cache on storage',
+        iconCls: 'drive',
+        handler: cleanImagecache
+    });
+
     var helpButton = new Ext.Button({
         text: 'Help',
 		iconCls: 'help',
@@ -254,7 +261,7 @@ tvheadend.miscconf = function(panel, index) {
         bodyStyle: 'padding:15px',
         layout: 'form',
         items: _items,
-        tbar: [saveButton, '->', helpButton]
+        tbar: [saveButton, '-', imagecacheButton, '->', helpButton]
     });
 
     tvheadend.paneladd(panel, mpanel, index);
@@ -285,6 +292,18 @@ tvheadend.miscconf = function(panel, index) {
             });
     });
 
+    function saveChangesImagecache(params) {
+        if (imagecache_form)
+            imagecache_form.getForm().submit({
+                url: 'api/imagecache/config/save',
+                params: params || {},
+                waitMsg: 'Saving data...',
+                failure: function(form, action) {
+                    Ext.Msg.alert('Imagecache save failed', action.result.errormsg);
+                }
+            });
+    }
+
     function saveChanges() {
         confpanel.getForm().submit({
             url: 'config',
@@ -296,13 +315,10 @@ tvheadend.miscconf = function(panel, index) {
                 Ext.Msg.alert('Save failed', action.result.errormsg);
             }
         });
-        if (imagecache_form)
-            imagecache_form.getForm().submit({
-                url: 'api/imagecache/config/save',
-                waitMsg: 'Saving data...',
-                failure: function(form, action) {
-                    Ext.Msg.alert('Imagecache save failed', action.result.errormsg);
-                }
-            });
+        saveChangesImagecache();
+    }
+
+    function cleanImagecache() {
+        saveChangesImagecache({'clean': 1});
     }
 };