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*shenans* refactored Posts.get to use async module instead of callback

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pyramid. Call time net decrease = 0, rofl.
v1.18.x
Julian Lam 12 years ago
parent 30bf27f1c7
commit 4a1dc28a26
2 changed files with 123 additions and 112 deletions
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232
src/posts.js
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@ -19,122 +19,134 @@ var RDB = require('./redis.js'),
if (start == null) start = 0;
if (end == null) end = start + 10;
// async.parallel({
// details: function(callback) {
// RDB.get('tid:' + tid + ':title', function(topic_name) {
// callback(null, {
// 'topic_name': topic_name
// });
// });
// },
// posts: function(callback) {
// var participant_uids = [],
// post_calls = [];
// RDB.lrange('tid:' + tid + ':posts', start, end, function(pids) {
// var content = [],
// uid = [],
// timestamp = [],
// pid = [],
// post_rep = [];
// for (var i=0, ii=pids.length; i<ii; i++) {
// content.push('pid:' + pids[i] + ':content');
// uid.push('pid:' + pids[i] + ':uid');
// timestamp.push('pid:' + pids[i] + ':timestamp');
// post_rep.push('pid:' + pids[i] + ':rep');
// pid.push(pids[i]);
// }
// if (pids.length > 0) {
// RDB.multi()
// .mget(content)
// .mget(uid)
// .mget(timestamp)
// .mget(post_rep)
// .exec(function(err, replies) {
// content = replies[0];
// uid = replies[1];
// timestamp = replies[2];
// post_rep = replies[3];
// callback(null, replies);
// }
// );
// }
// });
// }
// }, function(err, results) {
// callback(results);
// });
// return;
RDB.get('tid:' + tid + ':title', function(topic_name) { //do these asynch later
RDB.lrange('tid:' + tid + ':posts', start, end, function(pids) {
var content = [],
uid = [],
timestamp = [],
pid = [],
post_rep = [];
for (var i=0, ii=pids.length; i<ii; i++) {
content.push('pid:' + pids[i] + ':content');
uid.push('pid:' + pids[i] + ':uid');
timestamp.push('pid:' + pids[i] + ':timestamp');
post_rep.push('pid:' + pids[i] + ':rep');
pid.push(pids[i]);
}
async.parallel({
details: function(callback) {
RDB.get('tid:' + tid + ':title', function(topic_name) {
callback(null, {
'topic_name': topic_name
});
});
},
posts: function(callback) {
var participant_uids = [],
post_calls = [];
async.waterfall([
function(next) {
RDB.lrange('tid:' + tid + ':posts', start, end, function(pids) {
var content = [],
uids = [],
participants = [],
timestamp = [],
pid = [],
post_rep = [];
for (var i=0, ii=pids.length; i<ii; i++) {
content.push('pid:' + pids[i] + ':content');
uids.push('pid:' + pids[i] + ':uid');
timestamp.push('pid:' + pids[i] + ':timestamp');
post_rep.push('pid:' + pids[i] + ':rep');
pid.push(pids[i]);
}
if (pids.length > 0) {
RDB.multi()
.mget(content)
.mget(uid)
.mget(timestamp)
.mget(post_rep)
.exec(function(err, replies) {
content = replies[0];
uid = replies[1];
timestamp = replies[2];
post_rep = replies[3];
user.get_user_postdetails(uid, function(user_details) {
user.get_gravatars_by_uids(uid, '', function(gravatars) {
var posts = [];
var callbacks = content.length;
for (var i=0, ii=content.length; i<ii; i++) {
(function(i) {
Posts.hasFavourited(pid[i], current_user, function(hasFavourited) {
posts.push({
'pid' : pid[i],
'content' : marked(content[i] || ''),
'uid' : uid[i],
'username' : user_details.username[i] || 'anonymous',
'user_rep' : user_details.rep[i] || 0,
'post_rep' : post_rep[i] || 0,
'gravatar' : gravatars[i],
'timestamp' : timestamp[i],
'relativeTime': utils.relativeTime(timestamp[i]),
'fav_star_class' : hasFavourited ? 'icon-star' : 'icon-star-empty',
'display_moderator_tools' : uid[i] === current_user ? 'show' : 'hide'
});
callbacks--;
if (callbacks == 0) {
callback({'topic_name':topic_name, 'topic_id': tid, 'posts': posts});
}
});
}(i));
if (pids.length > 0) {
RDB.multi()
.mget(content)
.mget(uids)
.mget(timestamp)
.mget(post_rep)
.exec(function(err, replies) {
// Populate uids array
for(var x=0,numReplies=replies[1].length;x<numReplies;x++) {
var uid = parseInt(replies[1][x]);
if (participants.indexOf(uid) === -1) participants.push(uid);
}
// Construct return object
next(null, {
replies: replies,
pids: pids,
participants: participants
});
}
);
}
});
}, function(returnObj, next) {
// Get user details
var details = {},
calls = [];
for(var x=0,numParticipants=returnObj.participants.length;x<numParticipants;x++) {
(function(uid) {
calls.push(function(next) {
// Get individual participant's details
user.getUserData(uid, function(userData) {
next(null, userData);
})
});
});
})(returnObj.participants[x]);
}
async.parallel(calls, function(err, results) {
for(var x=0,numResults=results.length;x<numResults;x++) {
details[returnObj.participants[x]] = results[x];
}
returnObj.participants = details;
next(null, returnObj);
});
} else {
callback({});
}
}, function(returnObj, next) {
// Favourited?
var calls = [],
numPosts = returnObj.pids.length;
for(var x=0;x<numPosts;x++) {
(function(pid) {
calls.push(function(callback) {
Posts.hasFavourited(pid, current_user, function(hasFavourited) {
callback(null, hasFavourited);
});
});
})(returnObj.pids[x]);
}
async.parallel(calls, function(err, results) {
returnObj.favourites = results;
next(null, returnObj);
});
}
], function(err, returnObj) {
callback(null, returnObj);
});
}
}, function(err, results) {
// Construct posts array
var posts = [],
participant_details = results.posts.participants;
for(var x=0,numPosts=results.posts.pids.length;x<numPosts;x++) {
var uid = results.posts.replies[1][x],
participant = participant_details[uid];
posts.push({
pid: results.posts.pids[x],
content: marked(results.posts.replies[0][x] || ''),
uid: uid,
timestamp: results.posts.replies[2][x],
relativeTime: utils.relativeTime(results.posts.replies[2][x]),
post_rep: results.posts.replies[3][x],
display_moderator_tools: results.posts.replies[1][x] === current_user ? 'show' : 'hide',
username: participant.username,
gravatar: participant.picture,
user_rep: participant.reputation,
fav_star_class: results.posts.favourites[x] ? 'icon-star' : 'icon-star-empty',
});
}
// Construct return object
callback({
'topic_name': results.details.topic_name,
'topic_id': tid,
posts: posts,
uids: results.posts.participants
});
});
}

3
src/user.js
Unescape Escape View File

@ -59,7 +59,6 @@ var config = require('../config.js'),
for(var i=0, ii=uids.length; i<ii; ++i) {
User.getUserField(uids[i], 'picture', function(picture) {
console.log(picture);
gravatars.push(picture);
if(gravatars.length >= uids.length)
callback(gravatars);
@ -239,7 +238,7 @@ var config = require('../config.js'),
User.createGravatarURLFromEmail = function(email) {
if(email) {
var md5sum = crypto.createHash('md5');
md5sum.update(email.toLowerCase());
md5sum.update((email || '').toLowerCase());
var gravatarURL = 'http://www.gravatar.com/avatar/' + md5sum.digest('hex');
return gravatarURL;
}

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