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/**
* The Group Manager provides functions to manage groups in the database
*/
/*
* 2011 Peter 'Pita' Martischka
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var db = require("./DB").db;
var async = require("async");
var padManager = require("./PadManager");
exports.doesGroupExist = function(groupID, callback)
{
//try to get the group entry
db.get("group:" + groupID, function (err, group)
{
callback(err, group != null);
});
}
exports.createGroup = function(callback)
{
//search for non existing groupID
var groupID;
var foundNonExistingGroupID = false;
async.whilst(
function () { return !foundNonExistingGroupID; },
function (callback)
{
//generate a random 10 digit groupID
groupID = "";
for(var i=0;i<10;i++)
{
groupID+=Math.floor(Math.random()*10);
}
//check if this groupID already exisits
exports.doesGroupExist(groupID, function(err, exists)
{
foundNonExistingGroupID = !exists;
callback(err);
})
},
//we found a non existing groupID or an error happend
function (err)
{
//check for errors
if(err)
{
callback(err);
return;
}
//create the group
db.set("group:" + groupID, {pads: {}});
callback(null, {groupID: groupID});
}
);
}
exports.getMappedGroup4 = function(groupMapper, callback)
{
//ensure mapper is optional
if(typeof groupMapper != "string")
{
callback({stop: "groupMapper is no string"});
return;
}
//try to get a group for this mapper
db.get("mapper2group:"+groupMapper, function(err, groupID)
{
if(err)
{
callback(err);
return;
}
//there is no group for this mapper, let's create a group
if(groupID == null)
{
exports.createGroup(function(err, responseObj)
{
//check for errors
if(err)
{
callback(err);
return;
}
//create the mapper entry for this group
db.set("mapper2group:"+groupMapper, responseObj.groupID);
callback(null, responseObj);
});
}
//there is a group for this mapper, let's return it
else
{
callback(err, {groupID: groupID});
}
});
}
exports.createGroupPad = function(groupID, padName, text, callback)
{
//create the padID
var padID = groupID + "$" + padName;
async.series([
//ensure group exists
function (callback)
{
exports.doesGroupExist(groupID, function(err, exists)
{
//error
if(err)
{
callback(err);
}
//group does not exist
else if(exists == false)
{
callback({stop: "groupID does not exist"});
}
//group exists, everything is fine
else
{
callback();
}
});
},
//ensure pad does not exists
function (callback)
{
padManager.doesPadExists(padID, function(err, exists)
{
//error
if(err)
{
callback(err);
}
//pad exists already
else if(exists == true)
{
callback({stop: "padName does already exist"});
}
//pad does not exist, everything is fine
else
{
callback();
}
});
},
//create the pad
function (callback)
{
padManager.getPad(padID, text, function(err)
{
callback(err);
});
},
//create an entry in the group for this pad
function (callback)
{
db.setSub("group:" + groupID, ["pads", padID], 1);
callback();
}
], function(err)
{
callback(err, {padID: padID});
});
//check if groupID exists
//check if pad already exists
//create the pad
//create the subentry in the padobject
}
exports.listPads = function(groupID, callback)
{
exports.doesGroupExist(groupID, function(err, exists)
{
//error
if(err)
{
callback(err);
}
//group does not exist
else if(exists == false)
{
callback({stop: "groupID does not exist"});
}
//group exists, let's get the pads
else
{
db.getSub("group:" + groupID, ["pads"], function(err, pads)
{
callback(err, {padIDs: pads});
});
}
});
}
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