-- USER AVATAR (XEP-0084)

-- library

local sha1   = require 'sha1'

local base64 = require 'base64'

local lm     = require 'lm'

local pep    = require 'lm.pep'

local pubsub = require 'lm.pubsub'

--

local F = { }

-- TODO 'temporary disabling'

--          however I cannot see a method to enable it back without republishing avatar :(

--          this requires client to know, what is published on the server now

--          maybe we can do that by requesting item without payload from server

--      pubsub metadata notification handler

function F.publish ( conn, data, success, fail, height, width )

	local id = sha1.digest ( data )

	pep.publish ( conn, 'urn:xmpp:avatar:data',

		{ id = id,

			data = { xmlns = 'urn:xmpp:avatar:data',

				base64.encode ( data ),

			},

		},

		function ()

			pep.publish ( conn, 'urn:xmpp:avatar:metadata',

				{ id = id,

					info = { bytes = data:len (), id = id, type = 'image/png', height = height, width = width },

				}, success, fail )

		end, fail )

end

function F.publish_url ( conn, url, iid, size, id, mtype, success, fail, height, width )

	pep.publish ( conn, 'urn:xmpp:avatar:metadata',

		{ id = iid,

			info = { bytes = size, id = id, type = mtype, url = url, height = height, width = width },

		}, success, fail )

end

function F.get ( conn, from, id, success, fail )

	pubsub.retrieve ( conn, from, 'urn:xmpp:avatar:data',

		function ( from, node, item )

			local data = item:child ( 'data' )

			if data then

				success ( data:value () )

			else

				-- XXX

			end

		end, fail, nil, { id } )

end

return F

-- vim: se ts=4: --