store teaserPid in topic

-update teaser pid as necessary in addPostToTopic, removePostFromTopic,
post purge
-removed 20x db calls from getTeasers
-fixed scroll to post in sub folder install
-upgrade script to update topics with teaserPid

public/src/client/topic.js

@@ -104,7 +104,7 @@ define('forum/topic', [
 
 	function getPostIndex() {
 		var parts = window.location.pathname.split('/');
-		return parts[4] ? parseInt(parts[4], 10) : 0;
+		return parts[parts.length - 1] ? parseInt(parts[parts.length - 1], 10) : 0;
 	}
 
 	function handleSorting() {

src/posts/delete.js

@@ -167,6 +167,9 @@ module.exports = function(Posts) {
 						function (next) {
 							topics.decreasePostCount(postData.tid, next);
 						},
+						function(next) {
+							topics.updateTeaser(postData.tid, next);
+						},
 						function(next) {
 							user.incrementUserPostCountBy(postData.uid, -1, next);
 						},

src/topics/posts.js

@@ -23,7 +23,7 @@ module.exports = function(Topics) {
 			},
 			function(next) {
 				Topics.addPostToTopic(postData.tid, postData.pid, postData.timestamp, 0, next);
-			}
+			},
 		], callback);
 	};
 
@@ -134,43 +134,55 @@ module.exports = function(Topics) {
 		});
 	};
 
-	Topics.getLatestUndeletedPost = function(tid, callback) {
-		Topics.getLatestUndeletedPid(tid, function(err, pid) {
-			if(err) {
+	Topics.getLatestUndeletedPid = function(tid, callback) {
+		Topics.getLatestUndeletedReply(tid, function(err, pid) {
+			if (err) {
 				return callback(err);
 			}
-
-			posts.getPostData(pid, callback);
+			if (parseInt(pid, 10)) {
+				return callback(null, pid.toString());
+			}
+			Topics.getTopicField(tid, 'mainPid', function(err, mainPid) {
+				callback(err, parseInt(mainPid, 10) ? mainPid.toString() : null);
+			});
 		});
 	};
 
-	Topics.getLatestUndeletedPid = function(tid, callback) {
-		async.parallel({
-			mainPid: function(next) {
-				Topics.getTopicField(tid, 'mainPid', next);
-			},
-			pids: function(next) {
-				db.getSortedSetRevRange('tid:' + tid + ':posts', 0, -1, next);
-			}
-		}, function(err, results) {
-			if(err) {
-				return callback(err);
-			}
+	Topics.getLatestUndeletedReply = function(tid, callback) {
+		var isDeleted = false;
+		var done = false;
+		var latestPid = null;
+		var index = 0;
+		async.doWhilst(
+			function(next) {
+				db.getSortedSetRevRange('tid:' + tid + ':posts', index, index, function(err, pids) {
+					if (err) {
+						return next(err);
+					}
 
-			if (!results.mainPid && (!Array.isArray(results.pids) || !results.pids.length)) {
-				return callback(null, null);
-			}
+					if (!Array.isArray(pids) || !pids.length) {
+						done = true;
+						return next();
+					}
 
-			results.pids.push(results.mainPid);
-
-			async.detectSeries(results.pids, function(pid, next) {
-				posts.getPostField(pid, 'deleted', function(err, deleted) {
-					next(parseInt(deleted, 10) === 0);
+					posts.getPostField(pids[0], 'deleted', function(err, deleted) {
+						if (err) {
+							return next(err);
+						}
+						latestPid = pids[0];
+						isDeleted = deleted;
+						++index;
+						next();
+					});
 				});
-			}, function(pid) {
-				callback(null, pid ? pid.toString() : null);
-			});
-		});
+			},
+			function() {
+				return isDeleted && !done;
+			},
+			function(err) {
+				callback(err, latestPid);
+			}
+		);
 	};
 
 	Topics.addPostToTopic = function(tid, pid, timestamp, votes, callback) {
@@ -188,7 +200,12 @@ module.exports = function(Topics) {
 					function(next) {
 						db.sortedSetAdd('tid:' + tid + ':posts:votes', votes, pid, next);
 					}
-				], callback);
+				], function(err) {
+					if (err) {
+						return callback(err);
+					}
+					Topics.updateTeaser(tid, callback);
+				});
 			}
 		});
 	};
@@ -202,7 +219,10 @@ module.exports = function(Topics) {
 				db.sortedSetRemove('tid:' + tid + ':posts:votes', pid, next);
 			}
 		], function(err, results) {
-			callback(err);
+			if (err) {
+				return callback(err);
+			}
+			Topics.updateTeaser(tid, callback);
 		});
 	};
 

src/topics/teaser.js

@@ -17,29 +17,21 @@ module.exports = function(Topics) {
 			return callback(null, []);
 		}
 
-		async.parallel({
-			topics: function(next) {
-				Topics.getTopicsFields(tids, ['postcount'], next);
-			},
-			pids: function(next) {
-				async.map(tids, function(tid, next) {
-					db.getSortedSetRevRange('tid:' + tid + ':posts', 0, 0, function(err, data) {
-						next(err, Array.isArray(data) && data.length ? data[0] : null);
-					});
-				}, next);
-			}
-		}, function(err, results) {
+		Topics.getTopicsFields(tids, ['postcount', 'teaserPid'], function(err, topics) {
 			if (err) {
 				return callback(err);
 			}
+			var counts = [];
+			var teaserPids = [];
 
-			var counts = results.topics.map(function(topic) {
-				return topic && (parseInt(topic.postcount, 10) || 0);
+			topics.forEach(function(topic) {
+				counts.push(topic && (parseInt(topic.postcount, 10) || 0));
+				if (topic && topic.teaserPid) {
+					teaserPids.push(topic.teaserPid);
+				}
 			});
 
-			results.pids = results.pids.filter(Boolean);
-
-			posts.getPostsFields(results.pids, ['pid', 'uid', 'timestamp', 'tid'], function(err, postData) {
+			posts.getPostsFields(teaserPids, ['pid', 'uid', 'timestamp', 'tid'], function(err, postData) {
 				if (err) {
 					return callback(err);
 				}
@@ -81,42 +73,18 @@ module.exports = function(Topics) {
 	};
 
 	Topics.getTeaser = function(tid, callback) {
-		Topics.getLatestUndeletedPid(tid, function(err, pid) {
-			if (err || !pid) {
+		Topics.getTeasers([tid], function(err, teasers) {
+			callback(err, Array.isArray(teasers) && teasers.length ? teasers[0] : null);
+		});
+	};
+
+	Topics.updateTeaser = function(tid, callback) {
+		db.getSortedSetRevRange('tid:' + tid + ':posts', 0, 0, function(err, pids) {
+			if (err) {
 				return callback(err);
 			}
-
-			async.parallel({
-				postData: function(next) {
-					posts.getPostFields(pid, ['pid', 'uid', 'timestamp'], function(err, postData) {
-						if (err) {
-							return next(err);
-						} else if(!postData || !utils.isNumber(postData.uid)) {
-							return callback();
-						}
-
-						user.getUserFields(postData.uid, ['username', 'userslug', 'picture'], function(err, userData) {
-							if (err) {
-								return next(err);
-							}
-							postData.user = userData;
-							next(null, postData);
-						});
-					});
-				},
-				postCount: function(next) {
-					Topics.getTopicField(tid, 'post_count', next);
-				}
-			}, function(err, results) {
-				if (err) {
-					return callback(err);
-				}
-
-				results.postData.timestamp = utils.toISOString(results.postData.timestamp);
-				results.postData.index = results.postCount;
-
-				callback(null, results.postData);
-			});
+			var pid = Array.isArray(pids) && pids.length ? pids[0] : null;
+			Topics.setTopicField(tid, 'teaserPid', pid, callback);
 		});
 	};
 };

src/upgrade.js

@@ -21,7 +21,7 @@ var db = require('./database'),
 	schemaDate, thisSchemaDate,
 
 	// IMPORTANT: REMEMBER TO UPDATE VALUE OF latestSchema
-	latestSchema = Date.UTC(2014, 11, 2);
+	latestSchema = Date.UTC(2014, 11, 12);
 
 Upgrade.check = function(callback) {
 	db.get('schemaDate', function(err, value) {
@@ -389,6 +389,32 @@ Upgrade.upgrade = function(callback) {
 				winston.info('[2014/12/2] Removing register user fields skipped');
 				next();
 			}
+		},
+		function(next) {
+			thisSchemaDate = Date.UTC(2014, 11, 12);
+			if (schemaDate < thisSchemaDate) {
+				winston.info('[2014/12/12] Updating teasers');
+
+				db.getSortedSetRange('topics:tid', 0, -1, function(err, tids) {
+					if (err) {
+						return next(err);
+					}
+
+					async.eachLimit(tids, 50, function(tid, next) {
+						Topics.updateTeaser(tid, next);
+					}, function(err) {
+						if (err) {
+							winston.error('[2014/12/12] Error encountered while updating teasers');
+							return next(err);
+						}
+						winston.info('[2014/12/12] Updating teasers done');
+						Upgrade.update(thisSchemaDate, next);
+					});
+				});
+			} else {
+				winston.info('[2014/12/12] Updating teasers skipped skipped');
+				next();
+			}
 		}
 
 		// Add new schema updates here