Remove AI feature from entity system replacing it with simple options that alter it's behaviour

mods/ENTITIES/pyutest_entities/api.lua

@@ -148,7 +148,6 @@ end
 
 PyuTest.make_mob = function(name, properties, options)
   local default_options = {
-    ai = "dummy",
     max_jump = 1,
     max_drop = 8,
     speed = 3,
@@ -157,6 +156,7 @@ PyuTest.make_mob = function(name, properties, options)
     gravity = true,
     gravity_multiplier = 1,
     health_regen = true,
+    follow_player = false,
 
     sounds = {
       hurt = "pyutest-entity-hurt"
@@ -202,7 +202,6 @@ PyuTest.make_mob = function(name, properties, options)
           self.dtime = dtime
           self.moveresult = moveresult
 
-          local ai = self.options.ai
           local obj = self.object
           local p = obj:get_properties()
 
@@ -219,13 +218,9 @@ PyuTest.make_mob = function(name, properties, options)
           p.infotext = string.format("Mob Health: %d/%d", obj:get_hp(), p.hp_max)
           obj:set_properties(p)
 
-          if ai == nil or ai == "dummy" then
-            return
-          end
-
           self:do_physics()
 
-          if ai == "follownearest" then
+          if self.options.follow_player then
             self:path_find_nearest_entity(false)
           end
         end,

mods/ENTITIES/pyutest_entities/init.lua

@@ -10,7 +10,7 @@ PyuTest.make_mob("pyutest_entities:test_follower", {
     },
     nametag = "Test Follower",
 }, {
-    ai = "follownearest",
+    follow_player = true,
     max_jump = 1,
     max_drop = 50,
     view_range = 3,