add beacons (self-configurable transmitters)

beacon.lua

@@ -0,0 +1,38 @@
+minetest.register_node("ham_radio:beacon", {
+  description = "Ham Radio Beacon",
+  tiles = {
+	  "ham_radio_transmitter_top.png",
+	  "ham_radio_transmitter_top.png",
+	  "ham_radio_transmitter_side.png",
+	  "ham_radio_transmitter_side.png",
+	  "ham_radio_transmitter_side.png",
+	  "ham_radio_beacon_front.png"
+  },
+  groups = {cracky=2,oddly_breakable_by_hand=2},
+  sounds = default.node_sound_metal_defaults(),
+  paramtype2 = "facedir",
+  drawtype = "nodebox",
+  paramtype = "light",
+  node_box = {
+    type = "fixed",
+    fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
+  },
+  light_source = 5,
+  after_place_node = function(pos, placer)
+    local meta = minetest.get_meta(pos);
+    local name = placer:get_player_name()
+    meta:set_string('operated_by', name)
+    meta:set_string("frequency", ham_radio.find_free_frequency(ham_radio.settings.beacon_frequency))
+    ham_radio.transmitter_update_infotext(meta)
+    ham_radio.save_transmitter(pos, meta)
+  end,
+  can_dig = function(pos,player)
+    local meta = minetest.get_meta(pos);
+    local inv = meta:get_inventory()
+    local name = player:get_player_name()
+    return inv:is_empty("main") and not minetest.is_protected(pos, name)
+  end,
+  after_dig_node = function(pos, oldnode, oldmetadata, player)
+    ham_radio.delete_transmitter(pos)
+  end,
+});

helpers.lua

@@ -18,10 +18,10 @@ function ham_radio.find_transmitters(frequency)
   return transmitter_list
 end
 
-function ham_radio.find_free_frequency()
+function ham_radio.find_free_frequency(range)
   local frequency = -1
   while frequency == -1 do
-    frequency = tostring(math.floor(math.random(ham_radio.settings.frequency.min, ham_radio.settings.frequency.max)));
+    frequency = tostring(math.floor(math.random(range.min, range.max)));
     local are_there_transmitters = ham_radio.find_transmitters(frequency)
     if next(are_there_transmitters) then
       frequency = -1

init.lua

@@ -16,6 +16,10 @@ ham_radio = {
       min = 0,
       max = 9999999
     },
+    beacon_frequency = { -- sub-range of frequency range
+      min = 1000000,
+      max = 9999999
+    },
     digiline_channel = "ham_radio",
   }
 }
@@ -48,6 +52,7 @@ dofile(modpath.."/craft.lua")
 dofile(modpath.."/digiline.lua")
 dofile(modpath.."/transmitter.lua")
 dofile(modpath.."/receiver.lua")
+dofile(modpath.."/beacon.lua")
 dofile(modpath.."/broadcast.lua")
 dofile(modpath.."/hud.lua")
 
@@ -82,8 +87,3 @@ minetest.register_globalstep(function(dtime)
     broadcasttimer = 0
   end
 end)
-
--- TODO: craft transmitter
--- TODO: configure transmitter
--- TODO: craft pelengator
--- TODO: set pelengator frequency