Correctly delete reactions cache

postsDb.go

@@ -157,6 +157,7 @@ func (a *goBlog) createOrReplacePost(p *post, o *postCreationOptions) error {
 	}
 	// Purge cache
 	a.cache.purge()
+	a.deleteReactionsCache(p.Path)
 	return nil
 }
 
@@ -236,6 +237,7 @@ func (a *goBlog) deletePost(path string) error {
 		a.db.rebuildFTSIndex()
 		// Purge cache
 		a.cache.purge()
+		a.deleteReactionsCache(p.Path)
 	} else {
 		// Update post status
 		p.Status = postStatus(string(p.Status) + statusDeletedSuffix)

reactions.go

@@ -33,6 +33,9 @@ func (a *goBlog) reactionsEnabledForPost(post *post) bool {
 
 func (a *goBlog) initReactions() {
 	a.reactionsInit.Do(func() {
+		if !a.reactionsEnabled() {
+			return
+		}
 		a.reactionsCache, _ = ristretto.NewCache(&ristretto.Config{
 			NumCounters:        1000,
 			MaxCost:            100, // Cache reactions for 100 posts
@@ -42,6 +45,13 @@ func (a *goBlog) initReactions() {
 	})
 }
 
+func (a *goBlog) deleteReactionsCache(path string) {
+	a.initReactions()
+	if a.reactionsCache != nil {
+		a.reactionsCache.Del(path)
+	}
+}
+
 func (a *goBlog) postReaction(w http.ResponseWriter, r *http.Request) {
 	path := r.FormValue("path")
 	reaction := r.FormValue("reaction")