-- SUBSCRIBER USE CASES

function pubsub_subscribe ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	local jid = conn:jid():gsub ( '/.*', '' )

	conn:send (

		lm.message.create { mtype = 'iq-set', to = to, -- from = conn:jid (),

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub',

				subscribe = { node = node, jid = jid },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				local s = mess:path ( 'pubsub', 'subscription' )

				local info

				if s then

					local id = s:attribute ( 'subid' )

					if not id then

						id = 'unspecified'

					end

					info = ('%s is now %s to node %s (id %s)'):format ( s:attribute ( 'jid' ), s:attribute ( 'subscription' ), s:attribute ( 'node' ), id )

				else

					info = 'Subscription successful, but server supplied no info about it...'

				end

				main.print_info ( to, info )

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for subscription request: ' .. mess:xml () ) -- FIXME

				-- XXX: handle configuration forms?

				return true

			else

				print ( 'Weird response for subscription request: ' .. mess:xml () )

				return false

			end

		end )

end

function pubsub_unsubscribe ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	local jid = conn:jid():gsub ( '/.*', '' )

	conn:send (

		lm.message.create { mtype = 'iq-set', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub',

				unsubscribe = { node = node, jid = jid },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				main.print_info ( to, 'Unsubscription successful' )

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for unsubscription request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for unsubscription request: ' .. mess:xml () )

				return false

			end

		end )

end

-- I found no servers with subscription options support thus it is not implemented.

-- untested :(

function pubsub_retrieve ( to, node, handler, max, ids )

	local items = { node = node, max_items = max }

	if ids then

		items.item = { }

		for k, id in pairs ( ids ) do

			table.insert ( items.item, { id = id } )

		end

	end

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-set', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub',

				items = items,

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				local items = mess:path ( 'pubsub', 'items' )

				if items then

					local item = items:children ()

					while item do

						-- we cannot know, what item contains

						handler ( item )

						item = item:next ()

					end

				end

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for items retrieval request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for items retrieval request: ' .. mess:xml () )

				return false

			end

		end )

end

-- OWNER USE CASES

-- node may be nil

function pubsub_create_node ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-set', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub',

				create = { node = node },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				if node then

					main.print_info ( to, 'Node ' .. node .. ' successfully created' )

				else

					local create = mess:path ( 'pubsub', 'create' )

					if create then

						local nid = create:attribute ( 'node' )

						main.print_info ( to, 'Node created, id ' .. (nid or 'unspecified') )

					else

						main.print_info ( to, 'Node created, but no id provieded' )

					end

				end

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for node creation request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for node creation request: ' .. mess:xml () )

				return false

			end

		end )

end

function pubsub_delete_node ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-set', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub#owner',

				delete = { node = node },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				main.print_info ( to, 'Node ' .. node .. ' successfully deleted' )

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for node deletion request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for node deletion request: ' .. mess:xml () )

				return false

			end

		end )

end

function pubsub_purge_node ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-set', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub#owner',

				purge = { node = node },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				main.print_info ( to, 'Node ' .. node .. ' items successfully purged' )

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for node items purging request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for node items purging request: ' .. mess:xml () )

				return false

			end

		end )

end

function pubsub_configure_node ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-get', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub#owner',

				configure = { node = node },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				local x = mess:path ( 'pubsub', 'configure', 'x' )

				if x then

					local fid = parse_form ( x )

					forms[fid].send =

						function ( form )

							conn:send (

								lm.message.create { mtype = 'iq-set', to = to,

									pubsub = { xmlns = 'http://jabber.org/protocol/pubsub#owner',

										configure = { node = node,

											x = { xmlns = 'jabber:x:data', type = 'submit',

												field = form.val,

											},

										},

									},

								},

								function ( conn, mess )

									local mt, st = mess:type ()

									if st == 'result' then

										main.print_info ( to, 'Now you can run /form del ' .. fid .. ' to delete form from list' )

										form.status = 'acquired'

									elseif st == 'error' then

										main.print_info ( to, 'Got non-successful response to form:\n' .. mess:xml () )

										form.status = 'rejected'

									else

										print ( 'Weird response to submitted form:\n' .. mess:xml () )

										form.status = 'unknown'

										return false

									end

									return true

								end )

							form.status = 'sent'

						end

					forms[fid].status = 'filling'

					main.print_info ( to, 'You have new form. To fill it, use /form ' .. fid .. ' fieldname value' )

				else

					main.print_info ( to, 'Weird, no error and no node configuration form: ' .. mess:xml () )

				end

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for node configuration request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for node configuration request: ' .. mess:xml () )

				return false

			end

		end )

end

function pubsub_list_subscriptions ( to, node )

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-get', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub#owner',

				subscriptions = { node = node },

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				local s = mess:path ( 'pubsub', 'subscriptions' )

				if s then

					local sub = s:children ()

					main.print_info ( to, "List of subscriptions for node " .. node )

					while sub do

						local subid = sub:attribute ( 'subid' ) or 'unspecified'

						main.print_info ( to, ("%s is %s (id %s)"):format ( sub:attribute ( 'jid' ), sub:attribute ( 'subscription' ), subid ) )

						sub = sub:next ()

					end

				else

					main.print_info ( to, 'Weird response to node subscription list request: ' .. mess:xml () )

				end

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for node subscription list request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for node subscription list request: ' .. mess:xml () )

				return false

			end

		end )

end

function pubsub_modify_subscription ( to, node, who, state, id )

	local conn = lm.connection.bless ( main.connection () )

	conn:send (

		lm.message.create { mtype = 'iq-get', to = to,

			pubsub = { xmlns = 'http://jabber.org/protocol/pubsub#owner',

				subscriptions = { node = node,

					subscription = { jid = who, subscription = state, id = id },

				},

			},

		},

		function ( conn, mess )

			local mtype, smtype = mess:type ()

			if smtype == 'result' then

				main.print_info ( to, ('Subscription of %s to %s is successfully set to %s (id %s)'):format ( who, node, state, id or 'unspecified' ) )

				return true

			elseif smtype == 'error' then

				main.print_info ( to, 'Error response for node subscription list request: ' .. mess:xml () ) -- FIXME

				return true

			else

				print ( 'Weird response for node subscription list request: ' .. mess:xml () )

				return false

			end

		end )

end

-- INTERFACE

main.command ( 'node',

	function ( args )

		local who, action, node = args.t, args[1], args[2]

		if not who then

			who = main.current_buddy ()

		end

		if action == 'subscribe' then

			pubsub_subscribe ( who, node )

		elseif action == 'unsubscribe' then

			pubsub_unsubscribe ( who, node )

		elseif action == 'retrieve' or action == 'items' or action == 'get' then

			pubsub_retrieve ( who, node,

				function ( item )

					main.print_to ( who, item:xml () ) 

				end, args.m )

		elseif action == 'create' or action == 'new' then

			pubsub_create_node ( who, node )

		elseif action == 'delete' or action == 'del' then

			pubsub_delete_node ( who, node )

		elseif action == 'purge' or action == 'del_items' then

			pubsub_purge_node ( who, node )

		elseif action:sub ( 1, 4 ) == 'conf' then

			pubsub_configure_node ( who, node )

		elseif action == 'subscriptions' or action == 'subscribers' then

			pubsub_list_subscriptions ( who, node )

		elseif action == 'subscription' or action == 'modify' then -- XXX

			pubsub_modify_subscription ( args.t or main.current_buddy (), node, args[3], args[4], args[5] )

		else

			print ( 'Error: unknown action' )

		end

-- FIXME

commands_help['node']           = "[-t jid] [-m max_items] action [node_name]\n\nAction can be subscribe, unsubscribe, retrieve (items, get), create (new), delete (del), purge (del_items), configure (conf*), subscriptions (subscribers), subscription (modify?)"

--[[

commands_help['subscribe']      = "[-t jid] node_name\n\nSends pubsub subscription request to specified node of jid or current buddy."

commands_help['unsubscribe']    = "[-t jid] node_name\n\nSends pubsub unsubscription request to specified node of jid or current buddy."

commands_help['retrieve']       = "[-t jid] [-m max_items] node_name\n\nSends pubsub items retrieval request to specified node of jid or current buddy.\nNote, that we cannot know, how to deal with these itemss, so, raw xml will be printed as a result."

commands_help['create_node']    = "[-t jid] [node_name]\n\nSends pubsub node creation request to specified node of jid or current buddy. If node name is not specified, server can generate unique id for it, if supported."

commands_help['configure_node'] = "[-t jid] node_name\n\nSends pubsub node configuration request to specified node of jid or current buddy."

commands_help['delete_node']    = "[-t jid] node_name\n\nSends pubsub node deletion request to specified node of jid or current buddy."

commands_help['purge_node']     = "[-t jid] node_name\n\nSends pubsub node items purging request to specified node of jid or current buddy."

commands_help['subscriptions']  = "[-t jid] node_name\n\nSends pubsub subscription list request to specified node of jid or current buddy."

commands_help['subscription']   = "[-t jid] node_name subscriber_jid state [subscription_id]\n\nSends pubsub subscription modification request to change subscription state of 'subscriber_jid' to 'state'. Optional id is used when multiple subscriptions for one jid are available."

--]]

-- vim: se ts=4: --