49 lines
1.1 KiB
Lua
49 lines
1.1 KiB
Lua
local events = {
|
|
handlers = {}
|
|
}
|
|
|
|
function events.on(event, func)
|
|
if events.handlers[event] == nil then
|
|
events.handlers[event] = {}
|
|
end
|
|
table.insert(events.handlers[event], func)
|
|
end
|
|
|
|
function events.reset(event, func)
|
|
if func == nil then
|
|
events.handlers[event] = nil
|
|
else
|
|
events.handlers[event] = {func}
|
|
end
|
|
end
|
|
|
|
function events.remove_by_prefix(prefix)
|
|
for name, handlers in pairs(events.handlers) do
|
|
local actualname = name
|
|
if type(name) == 'table' then
|
|
actualname = name[1]
|
|
end
|
|
if actualname:sub(1, #prefix+1) == prefix..':' then
|
|
events.handlers[actualname] = nil
|
|
end
|
|
end
|
|
end
|
|
|
|
function events.emit(event, ...)
|
|
local result = nil
|
|
local handlers = events.handlers[event]
|
|
if handlers == nil then
|
|
return nil
|
|
end
|
|
for _, func in ipairs(handlers) do
|
|
local status, newres = xpcall(func, __vc__error, ...)
|
|
if not status then
|
|
debug.error("error in event ("..event..") handler: "..newres)
|
|
else
|
|
result = result or newres
|
|
end
|
|
end
|
|
return result
|
|
end
|
|
return events
|