pad.pub0.org/node/Models/Pad.js

143 lines
3.2 KiB
JavaScript

var Changeset = require("../Changeset");
var AttributePoolFactory = require("../AttributePoolFactory");
var db = require("../db").db;
var async = require("async");
var settings = require('../settings');
/**
* Copied from the Etherpad source code, don't know what its good for
* @param txt
*/
exports.cleanText = function (txt) {
return txt.replace(/\r\n/g,'\n').replace(/\r/g,'\n').replace(/\t/g, ' ').replace(/\xa0/g, ' ');
}
Class('Pad', {
// these are the properties
has : {
atext : {
is : 'rw', // readwrite
init : function() { return Changeset.makeAText("\n"); } // first value
}, // atext
pool : {
is: 'rw',
init : function() { return AttributePoolFactory.createAttributePool(); },
getterName : 'apool' // legacy
}, // pool
head : {
is : 'rw',
init : -1,
getterName : 'getHeadRevisionNumber'
}, // head
id : { is : 'r' }
},
methods : {
BUILD : function (id)
{
return {
'id' : id,
}
},
appendRevision : function(aChangeset, author)
{
if(!author)
author = '';
var newAText = Changeset.applyToAText(aChangeset, this.atext, this.pool);
Changeset.copyAText(newAText, this.atext);
var newRev = ++this.head;
var newRevData = {};
newRevData.changeset = aChangeset;
newRevData.meta = {};
newRevData.meta.author = author;
newRevData.meta.timestamp = new Date().getTime();
//ex. getNumForAuthor
if(author != '')
this.pool.putAttrib(['author', author || '']);
if(newRev % 100 == 0)
{
newRevData.meta.atext = this.atext;
}
db.set("pad:"+this.id+":revs:"+newRev, newRevData);
db.set("pad:"+this.id, {atext: this.atext, pool: this.pool.toJsonable(), head: this.head});
}, //appendRevision
getRevisionChangeset : function(revNum, callback)
{
db.getSub("pad:"+this.id+":revs:"+revNum, ["changeset"], callback);
}, // getRevisionChangeset
getRevisionAuthor : function(revNum, callback)
{
db.getSub("pad:"+this.id+":revs:"+revNum, ["meta", "author"], callback);
}, // getRevisionAuthor
getAllAuthors : function()
{
var authors = [];
for(key in this.pool.numToAttrib)
{
if(this.pool.numToAttrib[key][0] == "author" && this.pool.numToAttrib[key][1] != "")
{
authors.push(this.pool.numToAttrib[key][1]);
}
}
return authors;
},
text : function()
{
return this.atext.text;
},
init : function (callback)
{
var _this = this;
//try to load the pad
db.get("pad:"+this.id, function(err, value)
{
if(err)
{
callback(err, null);
return;
}
//if this pad exists, load it
if(value != null)
{
_this.head = value.head;
_this.atext = value.atext;
_this.pool = _this.pool.fromJsonable(value.pool);
}
//this pad doesn't exist, so create it
else
{
var firstChangeset = Changeset.makeSplice("\n", 0, 0, exports.cleanText(settings.defaultPadText));
_this.appendRevision(firstChangeset, '');
}
callback(null);
});
}
}, // methods
});