cache parsed post content

clear cache on plugin install/uninstall/activate/deactivate

package.json

@@ -33,6 +33,7 @@
     "heapdump": "^0.3.0",
     "less": "^2.0.0",
     "logrotate-stream": "^0.2.3",
+    "lru-cache": "^2.5.0",
     "mime": "^1.3.4",
     "mkdirp": "~0.5.0",
     "mmmagic": "^0.3.13",

src/postTools.js

@@ -14,7 +14,14 @@ var winston = require('winston'),
 	utils = require('../public/src/utils'),
 	plugins = require('./plugins'),
 	events = require('./events'),
-	meta = require('./meta');
+	meta = require('./meta'),
+	LRU = require('lru-cache');
+
+var cache = LRU({
+	max: 1048576,
+	length: function (n) { return n.length },
+	maxAge: 1000 * 60 * 60
+});
 
 (function(PostTools) {
 
@@ -100,6 +107,7 @@ var winston = require('winston'),
 					});
 				},
 				postData: function(next) {
+					cache.del(postData.pid);
 					PostTools.parsePost(postData, data.uid, next);
 				}
 			}, function(err, results) {
@@ -148,6 +156,7 @@ var winston = require('winston'),
 			}
 
 			if (isDelete) {
+				cache.del(postData.pid);
 				posts.delete(pid, callback);
 			} else {
 				posts.restore(pid, function(err, postData) {
@@ -165,7 +174,7 @@ var winston = require('winston'),
 			if (err || !canEdit) {
 				return callback(err || new Error('[[error:no-privileges]]'));
 			}
-
+			cache.del(pid);
 			posts.purge(pid, callback);
 		});
 	};
@@ -173,8 +182,18 @@ var winston = require('winston'),
 	PostTools.parsePost = function(postData, uid, callback) {
 		postData.content = postData.content || '';
 
+		var cachedContent = cache.get(postData.pid);
+		if (cachedContent) {
+			postData.content = cachedContent;
+			return callback(null, postData);
+		}
+
 		plugins.fireHook('filter:parse.post', {postData: postData, uid: uid}, function(err, data) {
-			callback(err, data ? data.postData : null);
+			if (err) {
+				return callback(err);
+			}
+			cache.set(data.postData.pid, data.postData.content);
+			callback(null, data.postData);
 		});
 	};
 
@@ -184,4 +203,8 @@ var winston = require('winston'),
 		plugins.fireHook('filter:parse.signature', {userData: userData, uid: uid}, callback);
 	};
 
+	PostTools.resetCache = function() {
+		cache.reset();
+	};
+
 }(exports));

src/socket.io/admin.js

@@ -104,10 +104,12 @@ SocketAdmin.themes.updateBranding = function(socket, data, callback) {
 };
 
 SocketAdmin.plugins.toggleActive = function(socket, plugin_id, callback) {
+	require('../postTools').resetCache();
 	plugins.toggleActive(plugin_id, callback);
 };
 
 SocketAdmin.plugins.toggleInstall = function(socket, data, callback) {
+	require('../postTools').resetCache();
 	plugins.toggleInstall(data.id, data.version, callback);
 };