HackMD/lib/history.js

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JavaScript
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//history
//external modules
var async = require('async');
//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,
updateHistory: updateHistory
};
function getHistory(userid, callback) {
models.User.findOne({
where: {
id: userid
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}
}).then(function (user) {
if (!user)
return callback(null, null);
var history = {};
if (user.history)
history = parseHistoryToObject(JSON.parse(user.history));
if (config.debug)
logger.info('read history success: ' + user.id);
return callback(null, history);
}).catch(function (err) {
logger.error('read history failed: ' + err);
return callback(err, null);
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});
}
function setHistory(userid, history, callback) {
models.User.update({
history: JSON.stringify(parseHistoryToArray(history))
}, {
where: {
id: userid
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}
}).then(function (count) {
return callback(null, count);
}).catch(function (err) {
logger.error('set history failed: ' + err);
return callback(err, null);
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});
}
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function updateHistory(userid, noteId, document, time) {
if (userid && noteId && typeof document !== 'undefined') {
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getHistory(userid, function (err, history) {
if (err || !history) return;
if (!history[noteId]) {
history[noteId] = {};
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}
var noteHistory = history[noteId];
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var noteInfo = models.Note.parseNoteInfo(document);
noteHistory.id = noteId;
noteHistory.text = noteInfo.title;
noteHistory.time = time || Date.now();
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noteHistory.tags = noteInfo.tags;
setHistory(userid, history, function (err, count) {
return;
});
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});
}
}
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;
}
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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)
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});
});
} 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, function (err, count) {
if (err) return response.errorInternalError(res);
res.end();
});
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} 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 (!history[noteId]) return response.errorNotFound(res);
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if (req.body.pinned === 'true' || req.body.pinned === 'false') {
history[noteId].pinned = (req.body.pinned === 'true');
setHistory(req.user.id, history, function (err, count) {
if (err) return response.errorInternalError(res);
res.end();
});
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} 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, [], function (err, count) {
if (err) return response.errorInternalError(res);
res.end();
});
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} else {
getHistory(req.user.id, function (err, history) {
if (err) return response.errorInternalError(res);
if (!history) return response.errorNotFound(res);
delete history[noteId];
setHistory(req.user.id, history, function (err, count) {
if (err) return response.errorInternalError(res);
res.end();
});
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});
}
} else {
return response.errorForbidden(res);
}
}
module.exports = History;