132 lines
3.0 KiB
JavaScript
132 lines
3.0 KiB
JavaScript
/**
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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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/**
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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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* Saves all Authors as a assoative Array. The Key is the author id.
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* Authors can have the following attributes:
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* -name The Name of the Author as shown on the Pad
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* -colorId The Id of Usercolor. A number between 0 and 31
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* -timestamp The timestamp on which the user was last seen
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*/
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var globalAuthors = {};
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/**
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* A easy key value pair. The Key is the token, the value is the authorid
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*/
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var token2author = {};
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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 token The token
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*/
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exports.getAuthor4Token = function (token)
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{
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var author;
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if(token2author[token] == null)
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{
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author = "g." + _randomString(16);
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while(globalAuthors[author] != null)
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{
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author = "g." + _randomString(16);
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}
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token2author[token]=author;
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globalAuthors[author] = {};
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globalAuthors[author].colorId = Math.floor(Math.random()*32);
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globalAuthors[author].name = null;
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}
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else
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{
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author = token2author[token];
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}
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globalAuthors[author].timestamp = new Date().getTime();
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return author;
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}
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/**
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* Returns the color Id of the author
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*/
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exports.getAuthorColorId = function (author)
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{
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throwExceptionIfAuthorNotExist(author);
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return globalAuthors[author].colorId;
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}
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/**
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* Sets the color Id of the author
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*/
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exports.setAuthorColorId = function (author, colorId)
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{
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throwExceptionIfAuthorNotExist(author);
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globalAuthors[author].colorId = colorId;
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}
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/**
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* Returns the name of the author
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*/
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exports.getAuthorName = function (author)
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{
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throwExceptionIfAuthorNotExist(author);
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return globalAuthors[author].name;
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}
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/**
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* Sets the name of the author
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*/
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exports.setAuthorName = function (author, name)
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{
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throwExceptionIfAuthorNotExist(author);
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globalAuthors[author].name = name;
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}
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/**
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* A internal function that checks if the Author exist and throws a exception if not
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*/
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function throwExceptionIfAuthorNotExist(author)
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{
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if(globalAuthors[author] == null)
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{
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throw "Author '" + author + "' is unkown!";
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}
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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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