Add workers for notes to leverage CPU intensive work loading

lib/workers/noteUpdater.js

@@ -0,0 +1,101 @@
+// external modules
+var async = require('async');
+var moment = require('moment');
+var LZString = require('lz-string');
+
+// core
+var config = require("../config.js");
+var logger = require("../logger.js");
+var models = require("../models");
+
+process.on('message', function (data) {
+    if (!data || !data.msg || data.msg !== 'update note' || !data.notes) return process.exit();
+    var notes = data.notes;
+    async.each(Object.keys(notes), function (key, callback) {
+        var note = notes[key];
+        if (config.debug) logger.info("note updater found dirty note: " + key);
+        updateNote(note, function(err, _note) {
+            if (!_note) {
+                process.send({
+                    msg: 'note not found',
+                    note: note
+                });
+                logger.error('note not found: ', note.id);
+            }
+            if (err || !_note) {
+                process.send({
+                    msg: 'error',
+                    note: note
+                });
+                return callback(err, null);
+            }
+            note.updatetime = moment(_note.lastchangeAt).valueOf();
+            process.send({
+                msg: 'check',
+                note: note
+            });
+            return callback(null, null);
+        });
+    }, function (err) {
+        if (err) logger.error('note updater error', err);
+        process.exit();
+    });
+});
+
+function updateNote(note, callback) {
+    models.Note.findOne({
+        where: {
+            id: note.id
+        }
+    }).then(function (_note) {
+        if (!_note) return callback(null, null);
+        if (note.lastchangeuser) {
+            if (_note.lastchangeuserId != note.lastchangeuser) {
+                models.User.findOne({
+                    where: {
+                        id: note.lastchangeuser
+                    }
+                }).then(function (user) {
+                    if (!user) return callback(null, null);
+                    note.lastchangeuserprofile = models.User.parseProfile(user.profile);
+                    return finishUpdateNote(note, _note, callback);
+                }).catch(function (err) {
+                    logger.error(err);
+                    return callback(err, null);
+                });
+            } else {
+                return finishUpdateNote(note, _note, callback);
+            }
+        } else {
+            note.lastchangeuserprofile = null;
+            return finishUpdateNote(note, _note, callback);
+        }
+    }).catch(function (err) {
+        logger.error(err);
+        return callback(err, null);
+    });
+}
+
+function finishUpdateNote(note, _note, callback) {
+    var body = note.document;
+    var title = note.title = models.Note.parseNoteTitle(body);
+    title = LZString.compressToBase64(title);
+    body = LZString.compressToBase64(body);
+    var values = {
+        title: title,
+        content: body,
+        authorship: LZString.compressToBase64(JSON.stringify(note.authorship)),
+        lastchangeuserId: note.lastchangeuser,
+        lastchangeAt: Date.now()
+    };
+    _note.update(values).then(function (_note) {
+        return callback(null, _note);
+    }).catch(function (err) {
+        logger.error(err);
+        return callback(err, null);
+    });
+}
+
+module.exports = {
+    updateNote: updateNote
+};