Add piezo beeper

init.lua

@@ -1,4 +1,5 @@
 digistuff = {}
+digistuff.sounds_playing = {}
 
 digistuff.update_panel_formspec = function (pos,dispstr)
 	local meta = minetest.get_meta(pos)
@@ -676,3 +677,82 @@ minetest.register_node("digistuff:touchscreen", {
 		},
 	},
 })
+
+minetest.register_node("digistuff:piezo", {
+	description = "Digilines Piezoelectric Beeper",
+	groups = {cracky=3},
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		meta:set_string("formspec","field[channel;Channel;${channel}")
+	end,
+	on_destruct = function(pos)
+		local pos_hash = minetest.hash_node_position(pos)
+		if digistuff.sounds_playing[pos_hash] then
+			minetest.sound_stop(digistuff.sounds_playing[pos_hash])
+			digistuff.sounds_playing[pos_hash] = nil
+		end
+	end,
+	tiles = {
+		"digistuff_piezo_top.png",
+		"digistuff_piezo_sides.png",
+		"digistuff_piezo_sides.png",
+		"digistuff_piezo_sides.png",
+		"digistuff_piezo_sides.png",
+		"digistuff_piezo_sides.png"
+		},
+	on_receive_fields = function(pos, formname, fields, sender)
+		local name = sender:get_player_name()
+		if minetest.is_protected(pos,name) and not minetest.check_player_privs(name,{protection_bypass=true}) then
+			minetest.record_protection_violation(pos,name)
+			return
+		end
+		local meta = minetest.get_meta(pos)
+		if fields.channel then meta:set_string("channel",fields.channel) end
+	end,
+	digiline = 
+	{
+		receptor = {},
+		effector = {
+			action = function(pos,node,channel,msg)
+					local meta = minetest.get_meta(pos)
+					local setchan = meta:get_string("channel")
+					if channel ~= setchan then return end
+					if msg == "shortbeep" then
+						local pos_hash = minetest.hash_node_position(pos)
+						if digistuff.sounds_playing[pos_hash] then
+							minetest.sound_stop(digistuff.sounds_playing[pos_hash])
+							digistuff.sounds_playing[pos_hash] = nil
+						end
+						minetest.sound_play({name = "digistuff_piezo_short_single",gain = 0.2},{pos = pos,max_hear_distance = 16})
+					elseif msg == "longbeep" then
+						local pos_hash = minetest.hash_node_position(pos)
+						if digistuff.sounds_playing[pos_hash] then
+							minetest.sound_stop(digistuff.sounds_playing[pos_hash])
+							digistuff.sounds_playing[pos_hash] = nil
+						end
+						minetest.sound_play({name = "digistuff_piezo_long_single",gain = 0.2},{pos = pos,max_hear_distance = 16})
+					elseif msg == "fastrepeat" then
+						local pos_hash = minetest.hash_node_position(pos)
+						if digistuff.sounds_playing[pos_hash] then
+							minetest.sound_stop(digistuff.sounds_playing[pos_hash])
+							digistuff.sounds_playing[pos_hash] = nil
+						end
+						digistuff.sounds_playing[pos_hash] = minetest.sound_play({name = "digistuff_piezo_fast_repeat",gain = 0.2},{pos = pos,max_hear_distance = 16,loop = true})
+					elseif msg == "slowrepeat" then
+						local pos_hash = minetest.hash_node_position(pos)
+						if digistuff.sounds_playing[pos_hash] then
+							minetest.sound_stop(digistuff.sounds_playing[pos_hash])
+							digistuff.sounds_playing[pos_hash] = nil
+						end
+						digistuff.sounds_playing[pos_hash] = minetest.sound_play({name = "digistuff_piezo_slow_repeat",gain = 0.2},{pos = pos,max_hear_distance = 16,loop = true})
+					elseif msg == "stop" then
+						local pos_hash = minetest.hash_node_position(pos)
+						if digistuff.sounds_playing[pos_hash] then
+							minetest.sound_stop(digistuff.sounds_playing[pos_hash])
+							digistuff.sounds_playing[pos_hash] = nil
+						end
+					end
+				end
+		},
+	},
+})