From 98c37108762c6d7c9f1d691b84f49bfa65b81b28 Mon Sep 17 00:00:00 2001
From: "Y. Wang" <yw05@forksworld.de>
Date: Sat, 11 Jun 2022 18:07:00 +0200
Subject: Implement primitive distant signaling

---
 advtrains_interlocking/distant_ui.lua | 76 +++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 advtrains_interlocking/distant_ui.lua

(limited to 'advtrains_interlocking/distant_ui.lua')

diff --git a/advtrains_interlocking/distant_ui.lua b/advtrains_interlocking/distant_ui.lua
new file mode 100644
index 0000000..4ec2255
--- /dev/null
+++ b/advtrains_interlocking/distant_ui.lua
@@ -0,0 +1,76 @@
+local F = advtrains.formspec
+local D = advtrains.distant
+local I = advtrains.interlocking
+
+function advtrains.interlocking.show_distant_signal_form(pos, pname)
+	local form = {"size[7,7]"}
+	form[#form+1] = advtrains.interlocking.make_signal_formspec_tabheader(pname, pos, 7, 3)
+	local main, set_by = D.get_main(pos)
+	if main then
+		local pts_main = minetest.pos_to_string(main)
+		form[#form+1] = F.S_label(0.5, 0.5, "This signal is a distant signal of @1.", pts_main)
+		if set_by == "manual" then
+			form[#form+1] = F.S_label(0.5, 1, "The assignment is made manually.")
+		elseif set_by == "routesetting" then
+			form[#form+1] = F.S_label(0.5, 1, "The assignment is made by the routesetting system.")
+		end
+	else
+		form[#form+1] = F.S_label(0.5, 0.5, "This signal is not assigned to a main signal.")
+		form[#form+1] = F.S_label(0.5, 1, "The distant aspect of the signal is not used.")
+	end
+	if set_by ~= nil then
+		form[#form+1] = F.S_button_exit(0.5, 1.5, 3, 1, "unassign_dst", "Unassign")
+		form[#form+1] = F.S_button_exit(3.5, 1.5, 3, 1, "assign_dst", "Reassign")
+	else
+		form[#form+1] = F.S_button_exit(0.5, 1.5, 6, 1, "assign_dst", "Assign")
+	end
+	minetest.show_formspec(pname, "advtrains:distant_" .. minetest.pos_to_string(pos), table.concat(form))
+end
+
+local signal_pos = {}
+local function init_signal_assignment(pname, pos)
+	if not minetest.check_player_privs(pname, "interlocking") then
+		minetest.chat_send_player(pname, attrans("This operation is not allowed without the @1 privilege.", "interlocking"))
+		return
+	end
+	signal_pos[pname] = pos
+	minetest.chat_send_player(pname, attrans("Please punch the signal to use as the main signal."))
+end
+
+minetest.register_on_punchnode(function(pos, node, player, pointed_thing)
+	local pname = player:get_player_name()
+	if not minetest.check_player_privs(pname, "interlocking") then
+		return
+	end
+	local spos = signal_pos[pname]
+	if not spos then
+		return
+	end
+	signal_pos[pname] = nil
+	local is_signal = minetest.get_item_group(node.name, "advtrains_signal") >= 2
+	if not is_signal then
+		minetest.chat_send_player(pname, attrans("Incompatible signal."))
+		return
+	end
+	minetest.chat_send_player(pname, attrans("Successfully assigned signal."))
+	D.assign(pos, spos, "manual")
+end)
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	local pname = player:get_player_name()
+	local pos = minetest.string_to_pos(string.match(formname, "^advtrains:distant_(.+)$") or "")
+	if not pos then
+		return
+	end
+	if not minetest.check_player_privs(pname, "interlocking") then
+		return
+	end
+	if advtrains.interlocking.handle_signal_formspec_tabheader_fields(pname, fields) then
+		return true
+	end
+	if fields.unassign_dst then
+		D.unassign_dst(pos)
+	elseif fields.assign_dst then
+		init_signal_assignment(pname, pos)
+	end
+end)
-- 
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