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93 lines
3.1 KiB
93 lines
3.1 KiB
if not WeakAuras.IsLibsOK() then return end
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--- @type string, Private
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local AddonName, Private = ...
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local WeakAuras = WeakAuras
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local L = WeakAuras.L
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--- @class SubscribableObject
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--- @field events table<string, frame[]>
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--- @field callback table<string, fun():nil>
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--- @field ClearSubscribers fun(self: SubscribableObject)
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--- @field ClearCallbacks fun(self: SubscribableObject)
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--- @field AddSubscriber fun(self: SubscribableObject, event: string, subscriber: frame, highPriority: boolean?)
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--- @field RemoveSubscriber fun(self: SubscribableObject, event: string, subscriber: frame)
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--- @field SetOnSubscriptionStatusChanged fun(self: SubscribableObject, event: string, cb: fun())
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--- @field Notify fun(self: SubscribableObject, event: type, ...: any)
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--- @field HasSubscribers fun(self: SubscribableObject, event: string): boolean
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--- @type SubscribableObject
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local SubscribableObject =
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{
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--- @type fun(self: SubscribableObject)
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ClearSubscribers = function(self)
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self.events = {}
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end,
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--- @type fun(self: SubscribableObject)
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ClearCallbacks = function(self)
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self.callbacks = {}
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end,
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--- @type fun(self: SubscribableObject, event: string, subscriber: frame, highPriority: boolean?)
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AddSubscriber = function(self, event, subscriber, highPriority)
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if not subscriber[event] then
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print("Can't register for ", event, " ", subscriber, subscriber.type)
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return
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end
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self.events[event] = self.events[event] or {}
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local pos = highPriority and 1 or (#self.events[event] + 1)
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if TableHasAnyEntries(self.events[event]) then
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tinsert(self.events[event], pos, subscriber)
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else
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tinsert(self.events[event], pos, subscriber)
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if self.callbacks[event] then
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self.callbacks[event]()
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end
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end
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end,
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--- @type fun(self: SubscribableObject, event: string, subscriber: frame)
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RemoveSubscriber = function(self, event, subscriber)
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if self.events[event] then
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local index = tIndexOf(self.events[event], subscriber)
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if index then
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tremove(self.events[event], index)
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if not TableHasAnyEntries(self.events[event]) then
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if self.callbacks[event] then
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self.callbacks[event]()
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end
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end
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end
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end
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end,
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--- @type fun(self: SubscribableObject, event: string, cb: fun())
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SetOnSubscriptionStatusChanged = function(self, event, cb)
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self.callbacks[event] = cb
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end,
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--- @type fun(self: SubscribableObject, event: type, ...: any)
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Notify = function(self, event, ...)
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if self.events[event] then
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for _, subscriber in ipairs(self.events[event]) do
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subscriber[event](subscriber, ...)
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end
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end
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end,
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--- @type fun(self: SubscribableObject, event: string): boolean
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HasSubscribers = function(self, event)
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return self.events[event] and TableHasAnyEntries(self.events[event])
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end
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}
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function Private.CreateSubscribableObject()
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local system = {}
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for f, func in pairs(SubscribableObject) do
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system[f] = func
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system.events = {}
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system.callbacks = {}
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end
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return system
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end
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