diff options
Diffstat (limited to 'lib/history.js')
| -rw-r--r-- | lib/history.js | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/lib/history.js b/lib/history.js new file mode 100644 index 00000000..4a3bbe1e --- /dev/null +++ b/lib/history.js @@ -0,0 +1,225 @@ +//history +//external modules +var async = require('async'); +var moment = require('moment'); + +//core +var config = require("./config.js"); +var logger = require("./logger.js"); +var response = require("./response.js"); +var models = require("./models"); + +//public +var History = { + historyGet: historyGet, + historyPost: historyPost, + historyDelete: historyDelete, + isReady: isReady, + updateHistory: updateHistory +}; + +var caches = {}; +//update when the history is dirty +var updater = setInterval(function () { + var deleted = []; + async.each(Object.keys(caches), function (key, callback) { + var cache = caches[key]; + if (cache.isDirty) { + if (config.debug) logger.info("history updater found dirty history: " + key); + var history = parseHistoryToArray(cache.history); + finishUpdateHistory(key, history, function (err, count) { + if (err) return callback(err, null); + if (!count) return callback(null, null); + cache.isDirty = false; + cache.updateAt = Date.now(); + return callback(null, null); + }); + } else { + if (moment().isAfter(moment(cache.updateAt).add(5, 'minutes'))) { + deleted.push(key); + } + return callback(null, null); + } + }, function (err) { + if (err) return logger.error('history updater error', err); + }); + // delete specified caches + for (var i = 0, l = deleted.length; i < l; i++) { + caches[deleted[i]].history = {}; + delete caches[deleted[i]]; + } +}, 1000); + +function finishUpdateHistory(userid, history, callback) { + models.User.update({ + history: JSON.stringify(history) + }, { + where: { + id: userid + } + }).then(function (count) { + return callback(null, count); + }).catch(function (err) { + return callback(err, null); + }); +} + +function isReady() { + var dirtyCount = 0; + async.each(Object.keys(caches), function (key, callback) { + if (caches[key].isDirty) dirtyCount++; + return callback(null, null); + }, function (err) { + if (err) return logger.error('history ready check error', err); + }); + return dirtyCount > 0 ? false : true; +} + +function getHistory(userid, callback) { + if (caches[userid]) { + return callback(null, caches[userid].history); + } else { + models.User.findOne({ + where: { + id: userid + } + }).then(function (user) { + if (!user) + return callback(null, null); + var history = []; + if (user.history) + history = JSON.parse(user.history); + if (config.debug) + logger.info('read history success: ' + user.id); + setHistory(userid, history); + return callback(null, history); + }).catch(function (err) { + logger.error('read history failed: ' + err); + return callback(err, null); + }); + } +} + +function setHistory(userid, history) { + if (Array.isArray(history)) history = parseHistoryToObject(history); + if (!caches[userid]) { + caches[userid] = { + history: {}, + isDirty: false, + updateAt: Date.now() + }; + } + caches[userid].history = history; +} + +function updateHistory(userid, noteId, document) { + if (userid && noteId && typeof document !== 'undefined') { + getHistory(userid, function (err, history) { + if (err || !history) return; + if (!caches[userid].history[noteId]) { + caches[userid].history[noteId] = {}; + } + var noteHistory = caches[userid].history[noteId]; + var noteInfo = models.Note.parseNoteInfo(document); + noteHistory.id = noteId; + noteHistory.text = noteInfo.title; + noteHistory.time = moment().valueOf(); + noteHistory.tags = noteInfo.tags; + caches[userid].isDirty = true; + }); + } +} + +function parseHistoryToArray(history) { + var _history = []; + Object.keys(history).forEach(function (key) { + var item = history[key]; + _history.push(item); + }); + return _history; +} + +function parseHistoryToObject(history) { + var _history = {}; + for (var i = 0, l = history.length; i < l; i++) { + var item = history[i]; + _history[item.id] = item; + } + return _history; +} + +function historyGet(req, res) { + if (req.isAuthenticated()) { + getHistory(req.user.id, function (err, history) { + if (err) return response.errorInternalError(res); + if (!history) return response.errorNotFound(res); + res.send({ + history: parseHistoryToArray(history) + }); + }); + } else { + return response.errorForbidden(res); + } +} + +function historyPost(req, res) { + if (req.isAuthenticated()) { + var noteId = req.params.noteId; + if (!noteId) { + if (typeof req.body['history'] === 'undefined') return response.errorBadRequest(res); + if (config.debug) + logger.info('SERVER received history from [' + req.user.id + ']: ' + req.body.history); + try { + var history = JSON.parse(req.body.history); + } catch (err) { + return response.errorBadRequest(res); + } + if (Array.isArray(history)) { + setHistory(req.user.id, history); + caches[req.user.id].isDirty = true; + res.end(); + } else { + return response.errorBadRequest(res); + } + } else { + if (typeof req.body['pinned'] === 'undefined') return response.errorBadRequest(res); + getHistory(req.user.id, function (err, history) { + if (err) return response.errorInternalError(res); + if (!history) return response.errorNotFound(res); + if (!caches[req.user.id].history[noteId]) return response.errorNotFound(res); + if (req.body.pinned === 'true' || req.body.pinned === 'false') { + caches[req.user.id].history[noteId].pinned = (req.body.pinned === 'true'); + caches[req.user.id].isDirty = true; + res.end(); + } else { + return response.errorBadRequest(res); + } + }); + } + } else { + return response.errorForbidden(res); + } +} + +function historyDelete(req, res) { + if (req.isAuthenticated()) { + var noteId = req.params.noteId; + if (!noteId) { + setHistory(req.user.id, []); + caches[req.user.id].isDirty = true; + res.end(); + } else { + getHistory(req.user.id, function (err, history) { + if (err) return response.errorInternalError(res); + if (!history) return response.errorNotFound(res); + delete caches[req.user.id].history[noteId]; + caches[req.user.id].isDirty = true; + res.end(); + }); + } + } else { + return response.errorForbidden(res); + } +} + +module.exports = History;
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