160 lines
4.1 KiB
JavaScript
160 lines
4.1 KiB
JavaScript
/**
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* The AuthorManager controlls all information about the Pad authors
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*/
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/*
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* 2011 Peter 'Pita' Martischka
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS-IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var db = require("./DB").db;
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var async = require("async");
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/**
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* Returns the Author Id for a token. If the token is unkown,
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* it creates a author for the token
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* @param {String} token The token
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* @param {Function} callback callback (err, author)
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* The callback function that is called when the result is here
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*/
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exports.getAuthor4Token = function (token, callback)
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{
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var author;
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async.series([
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//try to get the author for this token
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function(callback)
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{
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db.get("token2author:" + token, function (err, _author)
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{
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author = _author;
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callback(err);
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});
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},
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function(callback)
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{
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//there is no author with this token, so create one
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if(author == null)
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{
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author = createAuthor(token);
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callback();
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}
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//there is a author with this token
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else
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{
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//check if there is also an author object for this token, if not, create one
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db.get("globalAuthor:" + author, function(err, authorObject)
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{
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if(authorObject == null)
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{
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createAuthor(token);
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}
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else
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{
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//update the author time
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db.setSub("globalAuthor:" + author, ["timestamp"], new Date().getTime());
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}
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callback();
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});
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}
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}
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], function(err)
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{
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callback(err, author);
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});
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}
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/**
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* Internal function that creates the database entry for an author
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* @param {String} token The token
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*/
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function createAuthor (token)
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{
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//create the new author name
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author = "g." + _randomString(16);
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//set the token2author db entry
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db.set("token2author:" + token, author);
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//set the globalAuthors db entry
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var authorObj = {colorId : Math.floor(Math.random()*32), name: null, timestamp: new Date().getTime()};
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db.set("globalAuthor:" + author, authorObj);
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return author;
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}
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/**
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* Returns the Author Obj of the author
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* @param {String} author The id of the author
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* @param {Function} callback callback(err, authorObj)
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*/
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exports.getAuthor = function (author, callback)
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{
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db.get("globalAuthor:" + author, callback);
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}
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/**
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* Returns the color Id of the author
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* @param {String} author The id of the author
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* @param {Function} callback callback(err, colorId)
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*/
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exports.getAuthorColorId = function (author, callback)
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{
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db.getSub("globalAuthor:" + author, ["colorId"], callback);
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}
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/**
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* Sets the color Id of the author
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* @param {String} author The id of the author
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* @param {Function} callback (optional)
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*/
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exports.setAuthorColorId = function (author, colorId, callback)
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{
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db.setSub("globalAuthor:" + author, ["colorId"], colorId, callback);
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}
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/**
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* Returns the name of the author
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* @param {String} author The id of the author
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* @param {Function} callback callback(err, name)
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*/
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exports.getAuthorName = function (author, callback)
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{
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db.getSub("globalAuthor:" + author, ["name"], callback);
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}
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/**
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* Sets the name of the author
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* @param {String} author The id of the author
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* @param {Function} callback (optional)
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*/
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exports.setAuthorName = function (author, name, callback)
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{
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db.setSub("globalAuthor:" + author, ["name"], name, callback);
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}
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/**
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* Generates a random String with the given length. Is needed to generate the Author Ids
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*/
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function _randomString(len) {
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// use only numbers and lowercase letters
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var pieces = [];
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for(var i=0;i<len;i++) {
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pieces.push(Math.floor(Math.random()*36).toString(36).slice(-1));
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}
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return pieces.join('');
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}
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