FOnline SDK Variadic Hooks

Library adds event-like functions and methods Subscribe and Dispatch to subscribe a set of script callbacks to a named event and call it afterwards (up to 10 optional arguments supported).

Global:

void Subscribe(string& tag, string& module, string& function)
void Subscribe(string& tag, uint index, string& module, string& function)
void Subscribe(string& tag, string& name, string& module, string& function)
void Dispatch(string& tag)
void Dispatch(string& tag, ...?&inout)
void DispatchByIndex(string& tag, uint index)
void DispatchByIndex(string& tag, uint index, ...?&inout)
void DispatchByName(string& tag, string& name)
void DispatchByName(string& tag, string& name, ...?&inout)

Critter & CritterCl

aka DispatchByIndex(tag+"@Critter", cr.Id, ...)

void Critter::Subscribe(string& tag, string& module, string& function)
void Critter::Dispatch(string& tag)
void Critter::Dispatch(string& tag, ...?&inout)

Item & ItemCl:

aka DispatchByIndex(tag+"@Item", item.Id, ...)

void Item::Subscribe(string& tag, string& module, string& function)
void Item::Dispatch(string& tag)
void Item::Dispatch(string& tag, ...?&inout)

Map:

aka DispatchByIndex(tag+"@Map", map.Data.Id, ...)

void Map::Subscribe(string& tag, string& module, string& function)
void Map::Dispatch(string& tag)
void Map::Dispatch(string& tag, ...?&inout)

Installation

Build and bind dynamic library somewhere at the top of script modules loading order:

# pragma bindfunc "void _hooks() -> ../bin/_hooks.server.dll SERVER"
# pragma bindfunc "void _hooks() -> ../bin/_hooks.client.dll CLIENT"

Examples

Events

//
// logger.fos module
//
bool module_init() {
  Subscribe("Warning","logger","LogToFileStream");
}

void LogToFileStream(string message){
  // ...
}

//
// someothermodule.fos module random function body
//
Dispatch("Warning","Hello World!");

Filters

//
// item_durability.fos module
//
bool module_init() {
  Subscribe("filter:item_cost","ItemCostFilter");
}

void ItemCostFilter(uint itemId, float& cost) {
  Item@ item = GetItem(itemId);
  if (null is item) return;
  
  if (item.Durability < 50) {
    cost *= 0.5;
  }
}

//
// economics.fos module
//
float get_item_cost(Item@ item) {
  float cost = float(item.Proto.Cost);
  Dispatch("filter:item_cost", item.Id, cost);
  
  return cost;
}

...and other horrible stuff

//
// main.fos
//
uint loop(){
  if (0 == GetTick() % 100) {
    DispatchByIndex("loop",100);
    
    if (0 == GetTick() % 1000) {
      DispatchByIndex("loop",1000);
    }
  }
  return 10;
}

//
// custom.fos
//
bool module_init(){ 
  Subscribe("loop",100,"custom","loop");
}

void loop(){
  // Do stuff
}

erandelax/fonline_sdk_hooks