Improved helper functions for Lua scripts. Associated scripts to maps.

1 files changed, 63 insertions, 16 deletions

diff --git a/data/test.lua b/data/test.lua
index 3552acc7..5a1327a6 100644
--- a/data/test.lua
+++ b/data/test.lua
@@ -4,6 +4,11 @@
 
 -- NOTE: Could be put into a separate library
 
+function create_npc(id, x, y, handler)
+  local npc = tmw.obj_create_npc(id, x, y)
+  npcs[npc] = handler
+end
+
 function do_message(npc, ch, msg)
   tmw.msg_npc_message(npc, ch, msg)
   coroutine.yield(1)
@@ -14,37 +19,47 @@ function do_choice(npc, ch, msg)
   return coroutine.yield(2)
 end
 
+-- Called whenever a player starts talking to an NPC.
+-- Creates a coroutine based on the register NPC handler.
 function npc_start(npc, ch)
-  -- TODO: choose the handler depending on the npc type
-  local co = coroutine.create(my_npc_handler)
+  local h = npcs[npc]
+  if not h then return end
+  local co = coroutine.create(h)
   local b, v = coroutine.resume(co, npc, ch)
   if b and v then
-    npcs[ch] = {npc, co, v}
+    states[ch] = {npc, co, v, 5}
+    if not timer then
+      timer = 600
+    end
   end
 end
 
+-- Called whenever a player keeps talking to an NPC.
+-- Checks that the NPC expects it, and resumes the respective coroutine.
 function npc_next(npc, ch)
-  local w = npcs[ch]
+  local w = states[ch]
   if w and w[1] == npc and w[3] == 1 then
-    local co = w[2]
-    local b, v = coroutine.resume(co)
+    local b, v = coroutine.resume(w[2])
     if b and v then
-      npcs[ch] = {npc, co, v}
+      w[3] = v
+      w[4] = 5
     else
-      npcs[ch] = nil
+      states[ch] = nil
     end
   end
 end
 
+-- Called whenever a player selects a particular reply.
+-- Checks that the NPC expects it, and resumes the respective coroutine.
 function npc_choose(npc, ch, u)
-  local w = npcs[ch]
+  local w = states[ch]
   if w and w[1] == npc and w[3] == 2 then
-    local co = w[2]
-    local b, v = coroutine.resume(co, u)
+    local b, v = coroutine.resume(w[2], u)
     if b and v then
-      npcs[ch] = {npc, co, v}
+      w[3] = v
+      w[4] = 5
     else
-      npcs[ch] = nil
+      states[ch] = nil
     end
   end
 end
@@ -53,20 +68,41 @@ function npc_update(npc)
 end
 
 function update()
-  -- TODO: delete obsolete entries of the npcs table
+  -- Run every minute only, in order not to overload the server.
+  if not timer then return end
+  timer = timer - 10
+  if timer ~= 0 then return end
+  -- Free connections that have been inactive for 3-4 minutes.
+  for k, w in pairs(states) do
+    local t = w[4] - 1
+    if t == 0 then
+      states[k] = nil
+    else
+      w[4] = t
+    end
+  end
+  -- Restart timer if there are still some pending states.
+  if next(states) then
+    timer = 600
+  else
+    timer = nil
+  end
 end
 
 npcs = {}
+states = {}
 
 --------------
 -- Map code --
 --------------
 
 function initialize()
-  tmw.obj_create_npc(110, 50 * 32 + 16, 19 * 32 + 16)
+  create_npc(110, 50 * 32 + 16, 19 * 32 + 16, my_npc1)
+  create_npc(107, 53 * 32 + 16, 21 * 32 + 16, my_npc2)
+  create_npc(107, 53 * 32 + 16, 23 * 32 + 16, my_npc3)
 end
 
-function my_npc_handler(npc, ch)
+function my_npc1(npc, ch)
   do_message(npc, ch, "Hello! I am the testing NPC")
   do_message(npc, ch, "This message is just here for testing intertwined connections.")
   do_message(npc, ch, "What do you want?")
@@ -76,3 +112,14 @@ function my_npc_handler(npc, ch)
   end
 end
 
+npc2_times = 1
+
+function my_npc2(npc, ch)
+  do_message(npc, ch, "You know what?")
+  do_message(npc, ch, string.format("I have already asked this question %d times today.", npc2_times))
+  npc2_times = npc2_times + 1
+end
+
+function my_npc3(npc, ch)
+  do_message(npc, ch, "Don't you think the guy behind me is my evil twin?")
+end