mods that hopefully work for a TechAge-based pack

mods/travelnet/on_receive_fields.lua

@@ -0,0 +1,182 @@
+local S = minetest.get_translator("travelnet")
+
+local player_formspec_data = travelnet.player_formspec_data
+
+local function validate_travelnet(pos, meta)
+	local owner_name      = meta:get_string("owner")
+	local station_network = meta:get_string("station_network")
+	local station_name    = meta:get_string("station_name")
+
+	-- if there is something wrong with the data
+	if not owner_name or not station_network or not station_name then
+		print(
+			"ERROR: The travelnet at " .. minetest.pos_to_string(pos) .. " has a problem: " ..
+			" DATA: owner: " .. (owner_name or "?") ..
+			" station_name: " .. (station_name or "?") ..
+			" station_network: " .. (station_network or "?") .. "."
+		)
+		return false, S("Error") .. ": " ..
+				S("There is something wrong with the configuration of this station.") ..
+					" DEBUG DATA: owner: " .. (owner_name or "?") ..
+					" station_name: " .. (station_name or "?") ..
+					" station_network: " .. (station_network or "?") .. "."
+	end
+
+	-- TODO: This check seems odd, re-think this. Don't get node twice, don't hard-code node names.
+	local description = travelnet.node_description(pos)
+	if not description then
+		return false, S("Unknown node.")
+	end
+
+	return true, {
+		description = description,
+		owner_name = owner_name,
+		station_network = station_network,
+		station_name = station_name
+	}
+end
+
+local function decide_action(fields, props)
+	-- the player wants to quit/exit the formspec; do not save/update anything
+	if (fields.station_exit and fields.station_exit ~= "") or (fields.quit and fields.quit ~= "") then
+		return travelnet.actions.end_input
+	end
+
+	-- back button leads back to the previous form
+	if fields.back and fields.back ~= "" then
+		return travelnet.actions.return_to_form
+	end
+
+	-- if paging is enabled and the player wants to change pages
+	if (travelnet.MAX_STATIONS_PER_NETWORK == 0 or travelnet.MAX_STATIONS_PER_NETWORK > 24)
+		and fields.page_number
+		and (
+			fields.next_page
+			or fields.prev_page
+			or fields.last_page
+			or fields.first_page
+		)
+	then
+		return travelnet.actions.navigate_page
+	end
+
+	-- the player wants to remove the station
+	if fields.station_dig then
+		return travelnet.actions.remove_station
+	end
+
+	-- the player wants to open the edit form
+	if fields.station_edit then
+		return travelnet.actions.edit_station
+	end
+
+	-- if the box has not been configured yet
+	if travelnet.is_falsey_string(props.station_network) then
+		return travelnet.actions.add_station
+	end
+
+	-- save pressed after editing
+	if fields.station_set then
+		return travelnet.actions.update_station
+	end
+
+	-- pressed the "open door" button
+	if fields.open_door then
+		return travelnet.actions.toggle_door
+	end
+
+	-- the owner or players with the travelnet_attach priv can move stations up or down in the list
+	if fields.move_up or fields.move_down then
+		return travelnet.actions.change_order
+	end
+
+	if not fields.target then
+		return travelnet.actions.instruct_player
+	end
+
+	local network = travelnet.get_network(props.owner_name, props.station_network)
+	if not network then
+		return travelnet.actions.add_station
+	end
+
+	return travelnet.actions.transport_player
+end
+
+function travelnet.on_receive_fields(pos, _, fields, player)
+	if not player then
+		return
+	end
+
+	local name = player:get_player_name()
+	player_formspec_data[name] = player_formspec_data[name] or {}
+	if pos then
+		player_formspec_data[name].pos = pos
+	else
+		pos = player_formspec_data[name].pos
+	end
+
+	local action_args = {
+		pos = pos,
+		props = {}
+	}
+
+	if not pos then
+		travelnet.actions.end_input(action_args, fields or {}, player)
+		travelnet.show_formspec(name, false)
+		return
+	end
+
+	local node = minetest.get_node(pos)
+	action_args.node = node
+
+	local meta = minetest.get_meta(pos)
+	action_args.meta = meta
+
+	if not fields then
+		travelnet.actions.end_input(action_args, {}, player)
+		travelnet.show_formspec(name, false)
+		return
+	end
+
+	-- Validate node's meta data
+	local valid, props = validate_travelnet(pos, meta)
+	if not valid then
+		minetest.chat_send_player(name, props)
+		travelnet.actions.end_input(action_args, fields, player)
+		travelnet.show_formspec(name, false)
+		return
+	end
+	props.is_elevator = travelnet.is_elevator(node.name)
+	action_args.props = props
+
+	-- Decide which action to run based on fields given
+	local action = decide_action(fields, props)
+	if not action then
+		travelnet.actions.end_input(action_args, fields, player)
+		travelnet.show_formspec(name, false)
+		return
+	end
+
+	-- Perform the action
+	local success, result = action(action_args, fields, player)
+
+	-- Respond with a formspec
+	if success then
+		if result and result.formspec then
+			if result.formspec ~= travelnet.formspecs.current then
+				player_formspec_data[name].current_form = result.formspec
+			end
+			if result.options then
+				for k,v in pairs(result.options) do
+					props[k] = v
+				end
+			end
+			travelnet.show_formspec(name, result.formspec(props, name))
+		else
+			travelnet.actions.end_input(action_args, fields, player)
+			travelnet.show_formspec(name, false)
+		end
+	else
+		travelnet.show_formspec(name, travelnet.formspecs.error_message({ message = result }))
+	end
+end