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###
ownCloud - App Framework
@author Bernhard Posselt
@copyright 2012 Bernhard Posselt nukeawhale@gmail.com
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
License as published by the Free Software Foundation; either
version 3 of the License, or any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU AFFERO GENERAL PUBLIC LICENSE for more details.
You should have received a copy of the GNU Affero General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>.
###
# A class which follows the command pattern
# Can be used for actions that need need to be able to undo like folder deletion
angular.module('News').factory 'UndoQueue',
['$timeout', '$rootScope',
($timeout, $rootScope) ->
class UndoQueue
constructor: (@_$timeout, @_$rootScope) ->
@_queue = []
add: (@_caption, @_callback, @_timeout=0, @_undoCallback=null) ->
###
@_caption the caption which indentifies the item
@_callback function the callback which should be executed when it was
not undone, this will usually be a request to the server to finally
delete something
@_timeout int the timeout after the callback should be executed
defaults to 0
@_undoCallback function the function which should be executed when
an command has been canceled. Usually this will add back a deleted
object back to the interface, defaults to an empty function
###
@executeAll()
command =
_undoCallback: @_undoCallback or= ->
_callback: @_callback
execute: =>
command._callback()
undo: =>
command._undoCallback()
@_$timeout.cancel(command.promise)
@_queue = []
promise: @_$timeout =>
command.execute()
@_queue = []
@_$rootScope.$broadcast('notUndone')
, @_timeout
data =
undoCallback: command.undo
caption: @_caption
@_$rootScope.$broadcast 'undoMessage', data
@_queue.push(command)
executeAll: ->
###
Executes the callback before the timeout has run out
This is useful to execute all remaining commands if a new command is
added
###
for command in @_queue
@_$timeout.cancel(command.promise)
command.execute()
@_queue = []
return new UndoQueue($timeout, $rootScope)
]
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