z

client/impl/newbie.impl.lua

@@ -7,3 +7,4 @@ end
 function Impl:OnReady()
   main:LogInfo("%s ready", self:GetName())
 end
+

client/impl/test.impl.lua

@@ -5,8 +5,14 @@ function Impl:Init()
   self.data = {
     test = "test"
   }
+  self.testVar = 0
 end
 
 function Impl:GetData()
   return self.data
 end
+
+function Impl:Add(amount, amount2)
+  self.testVar = self.testVar + amount + amount2
+  return self.testVar
+end

client/impl/test2.impl.lua

@@ -0,0 +1,39 @@
+local Impl = NewImpl("Test2")
+
+function Impl:OnReady()
+  self:MainThread()
+  self:TestHook()
+  self:TestReplaceMethod()
+end
+
+function Impl:MainThread()
+  local testImpl = main:GetImpl("Test")
+  Citizen.CreateThread(function()
+    while true do 
+      Wait(1000)
+      local result = testImpl:Add(1, 2)
+      main:LogInfo("TestImpl result %s", result)
+    end
+  end)
+end
+
+function Impl:TestHook()
+  local testImpl = main:GetImpl("Test")
+  testImpl:HookMethod("Add", function(self, amount, amount2)
+    return amount+1, amount2
+  end)
+end
+
+function Impl:TestReplaceMethod()
+  Citizen.CreateThread(function()
+    Wait(5000)
+    local testImpl = main:GetImpl("Test")
+    local oldMethod = testImpl:GetMethod("Add")
+    testImpl:ReplaceMethod("Add", function(self, amount, amount2)
+      self.testVar = self.testVar * amount * amount2
+      return self.testVar
+    end)
+    Wait(5000)
+    testImpl:ReplaceMethod("Add", oldMethod)
+  end)
+end

impl.lua

@@ -90,7 +90,10 @@ end
 
 -- create an instance of an object with constructor parameters
 function Class:new(...)
-	local obj = self:extend({})
+	local obj = self:extend({
+    destroyed = false,
+    originalMethods = {}
+  })
 	if obj.Init then obj:Init(...) end
 	return obj
 end
@@ -115,6 +118,53 @@ end
 function Impl:OnReady(...)
 end
 
+function Impl:HookMethod(method, hookFn)
+  local oldMethod = self[method]
+  if not oldMethod then 
+    main:LogError("Impl %s missing method %s", self.name, method)
+    return
+  end
+  self.originalMethods[method] = oldMethod
+
+  self[method] = function(...)
+    if self.destroyed then
+      return
+    end
+    local result = {pcall(hookFn, ...)}
+    print(json.encode(result))
+    local success = table.remove(result, 1)
+    if not success then
+      main:LogError("Impl %s hook %s error: %s", self.name, method, result[2])
+      self[method] = oldMethod
+      return oldMethod(...)
+    end
+    return oldMethod(self, table.unpack(result))
+  end
+end
+
+function Impl:GetMethod(method)
+  return self[method]
+end
+
+function Impl:ReplaceMethod(method, newMethod)
+  if not self[method] then 
+    main:LogError("Impl %s missing method %s", self.name, method)
+    return
+  end
+  if not self.originalMethods[method] then 
+    self.originalMethods[method] = self[method]
+  end
+  self[method] = newMethod
+end
+
+function Impl:RefreshMethod(method)
+  if not self.originalMethods[method] then 
+    main:LogError("Impl %s missing method %s", self.name, method)
+    return
+  end
+  self[method] = self.originalMethods[method]
+end
+
 function NewImpl(name)
   local impl = Impl:extend({
     name = name

main.lua

@@ -8,6 +8,7 @@ function Main:Init()
   local o = {}
   setmetatable(o, {__index = Main})
   o.impls = {}
+  o.initializedImpls = {}
   o.lastTimeImplRegistered = 0
   o.ready = false
   if not IsDuplicityVersion() then
@@ -78,28 +79,28 @@ function Main:RegisterImpl(name, impl)
   self.lastTimeImplRegistered = GetGameTimer()
   self:LogSuccess("Impl %s registered", name)
   if self.ready then 
-    self.impls[name] = impl(self)
-    self.impls[name]:OnReady()
+    self.initializedImpls[name] = impl(self)
+    self.initializedImpls[name]:OnReady()
   end
 end
 
 function Main:InitImpl()
   for name, impl in pairs(self.impls) do
-    self.impls[name] = impl(self)
+    self.initializedImpls[name] = impl(self)
   end
   self:LogInfo("All impls initialized")
   self.ready = true
-  for name, impl in pairs(self.impls) do
+  for name, impl in pairs(self.initializedImpls) do
     impl:OnReady()
   end
 end
 
 function Main:GetImpl(name)
-  if not self.impls[name] then
+  if not self.initializedImpls[name] then
     self:LogError("Impl %s not found", name)
     return
   end
-  return self.impls[name]
+  return self.initializedImpls[name]
 end
 
 function Main:ImplCall(name, func, ...)
@@ -114,6 +115,8 @@ function Main:ImplCall(name, func, ...)
   return impl[func](impl, ...)
 end
 
+
+
 function Main:ImplInfo()
   for name, impl in pairs(self.impls) do
     local debug = debug.getinfo(impl.Init, "S")