###

ownCloud - News

@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/>.

###

angular.module('News').factory 'ItemModel',
['_Model', '_MinimumQuery', 'StatusFlag',
(_Model, _MinimumQuery, StatusFlag) ->

	class ItemModel extends _Model


		constructor: ->
			@_guidFeedIdHash = {}
			super()


		clear: ->
			@_guidFeedIdHash = {}
			super()


		# items have two unique fields: feed_id and guidhash
		# in case we get updated items with the same two fields we
		# also need to update the field
		add: (data, clearCache=true) ->
			@_bindMethods(data)

			hash = data.feedId + '_' + data.guidHash
			entry = @_guidFeedIdHash[hash]

			# update entry if exists with same feedid and guidhash
			if angular.isDefined(entry)
				@update(data, clearCache)
			else
				@_guidFeedIdHash[hash] = data
				super(data, clearCache)


		_bindMethods: (data) ->
			data.isRead = ->
				return !((@status & StatusFlag.UNREAD) == StatusFlag.UNREAD)
			data.setRead = ->
				@status &= ~StatusFlag.UNREAD
			data.setUnread = ->
				@status |= StatusFlag.UNREAD
			data.isStarred = ->
				return (@status & StatusFlag.STARRED) == StatusFlag.STARRED
			data.setStarred = ->
				@status |= StatusFlag.STARRED
			data.setUnstarred = ->
				@status &= ~StatusFlag.STARRED


		update: (data, clearCache=true) ->
			hash = data.feedId + '_' + data.guidHash
			entry = @_guidFeedIdHash[hash]

			# first update id that could have changed
			delete @_dataMap[entry.id]
			@_dataMap[data.id] = entry
			
			# now copy over the elements data attrs
			for key, value of data
				if key == 'feedId' or key == 'guidHash'
					continue
				else
					entry[key] = value

			super(entry, clearCache)


		getByGuidHashAndFeedId: (guidHash, feedId) ->
			hash = feedId + '_' + guidHash
			return @_guidFeedIdHash[hash]


		removeById: (id) ->
			item = @getById(id)
			hash = item.feedId + '_' + item.guidHash
			delete @_guidFeedIdHash[hash]
			super(id)


		getLowestId: ->
			query = new _MinimumQuery('id')
			lowestId = @get(query)

			if angular.isDefined(lowestId)
				return lowestId.id
			else
				return 0


	return new ItemModel()
]