610 lines
21 KiB
Lua
610 lines
21 KiB
Lua
local function Init()
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local metadata = {
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return ReactiveValue|nil
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__add = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value + other._value
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end
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if otherType == "string" and self._type == otherType then return self._value .. other end
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if otherType == "number" and self._type == otherType then return self._value + other end
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return nil
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return ReactiveValue|nil
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__mul = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value * other._value
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end
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if otherType == "number" and self._type == otherType then return self._value * other end
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return nil
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return ReactiveValue|nil
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__sub = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value - other._value
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end
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if otherType == "number" and self._type == otherType then return self._value - other end
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return nil
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return ReactiveValue|nil
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__div = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value / other._value
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end
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if otherType == "number" and self._type == otherType then return self._value / other end
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return nil
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return ReactiveValue|nil
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__mod = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value % other._value
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end
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if otherType == "number" and self._type == otherType then return self._value % other end
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return nil
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return ReactiveValue|nil
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__pow = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value ^ other._value
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end
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if otherType == "number" and self._type == otherType then return self._value ^ other end
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return nil
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return boolean
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__eq = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value == other._value
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end
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return self._value == other
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return boolean
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__lt = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value < other._value
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end
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return self._value < other
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return boolean
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__le = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value <= other._value
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end
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return self._value <= other
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return boolean
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__gt = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value > other._value
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end
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return self._value > other
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end,
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---@param self ReactiveValue
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---@param other ReactiveValue
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---@return boolean
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__ge = function(self, other)
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local otherType = type(other)
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if otherType == "table" and other._type and other._type == self._type and other._value then
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return self._value >= other._value
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end
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return self._value >= other
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end,
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---@param self ReactiveValue
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---@return number
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__len = function(self)
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if self._type == "table" then return #self._value end
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if self._type == "string" then return string.len(self._value) end
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return 0
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end,
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---@param self ReactiveValue
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---@return string
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__tostring = function(self) return tostring(self._value) end,
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---@param self ReactiveValue
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---@param key string
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---@param value any
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---@return nil
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__newindex = function(self, key, value)
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local setupComplete = rawget(self, "_setupComplete")
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if setupComplete == nil or setupComplete == false then
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rawset(self, key, value)
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return
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end
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if self._type ~= "table" then
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rawset(self, key, value)
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return
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end
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self._value[key] = value
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local ChangedKey = { key }
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-- If the value being assigned is a ReactiveValue
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-- Then listen to changes on it as well
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-- And propagate those changes upwards
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if self._recursive and getmetatable(value) == getmetatable(self) then self:_setupListeners(key, value) end
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self:_notify()
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self:_notifyFieldChanged(ChangedKey)
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self:_notifyAnyFieldChanged(ChangedKey)
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end,
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---@param self ReactiveValue
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---@param key string
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---@return any|nil
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__index = function(self, key)
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local value = rawget(self, key)
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if value ~= nil then return value end
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if rawget(self, "_type") ~= "table" then return nil end
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local innerTable = rawget(self, "_value")
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if innerTable ~= nil then return rawget(innerTable, key) end
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return nil
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end,
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-- __index = ReactiveValue
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}
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--- Sadly I could not get @generic to play nice with this class
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--- I think it's not ready yet, there are issues on github describing similar problems and it is marked as WIP...
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--- Guess I'll have to live without it for now and specify type of a RV in #type
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---## A type safe value that can be listened to for changes
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---### **Always use RV:set() for setting primitive values**
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--- Supports primitive values and tables<br>
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--- Tables can be listened to for changes on any field or a specific field<br>
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---### Example usage (value):<br>
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--- ```lua
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--- local test = ReactiveValue.new(1)
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--- test:onChange(function(value)
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--- print("test changed to " .. value)
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--- end)
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--- test:set(2)
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--- test:set(test + 3)
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--- ```
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---### Example usage (table):<br>
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--- ```lua
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--- local test = ReactiveValue.new({1, 2, 3})
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--- test:onAnyFieldChange(function(field, value)
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--- print(string.format("test.%s changed to %s", table.concat(field, "."), value))
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--- end)
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--- test[1] = 4 -- test.1 changed to 4
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--- test[4] = {1, 2, 3} -- test.4 changed to <table>
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--- test[4][1] = 14 -- No log(!!) because test[4] is a table and not a ReactiveValue
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--- ```
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---### To trigger a callback for `test[4][1]` in the previous example do:<br>
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--- ```lua
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--- local test = ReactiveValue.new({1, 2, 3}, true)
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--- test:onAnyFieldChange(function(field, value)
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--- print(string.format("test.%s changed to %s", table.concat(field, "."), value))
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--- end)
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--- test[1] = 4 -- test.1 changed to 4
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--- test[4] = {1, 2, 3} -- test.4 changed to <table>
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--- test[4][1] = 14 -- test.4.1 changed to 14
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--- ```
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---### To listen to a specific field of a table do:<br>
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--- ```lua
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--- local test = ReactiveValue.new({1, 2, 3}, true)
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--- test:onFieldChange("1", function(value)
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--- print("test.1 changed to " .. value)
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--- end)
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--- test[1] = 4 -- test.1 changed to 4
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--- test[4] = {1, 2, 3} -- Does not trigger callback
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-- ```
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---@class ReactiveValue
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---@field _listeners table<function, boolean>
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---@field _fieldListeners table<string, table<function, boolean>>
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---@field _anyFieldListeners table<number, table<function, boolean>>
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---@field _oneTimeListeners table<function, boolean>
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---@field _value any
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---@field _type string
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---@field _recursive boolean?
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ReactiveValue = {
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---#### Get the underlying value of a ReactiveValue
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---@param self ReactiveValue
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---@return any
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get = function(self) end,
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---### Set the underlying value of a ReactiveValue triggering listener callbacks
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---@param self ReactiveValue
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---@param newValue any
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set = function(self, newValue) end,
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---## EVENT
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---### Register a listener that is triggered whenever the underlying value changes
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--- Returns a function that can be called to undo the callback
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---@param self ReactiveValue
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---@param callback fun(value: any, type: string)
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---@return fun(): nil
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onChange = function(self, callback) end,
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---## EVENT
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---### Register a listener that is triggered whenever a specific field of a table changes
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--- Returns a function that can be called to undo the callback
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---@param self ReactiveValue
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---@param field string
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---@param callback fun(field: string[], value: any, type: string)
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---@return fun(): nil
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onFieldChange = function(self, field, callback) end,
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---## EVENT
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---### Register a listener that is triggered whenever any field of a table changes
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--- Returns a function that can be called to undo the callback
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---@param self ReactiveValue
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---@param callback fun(field: string[], value: any, type: string)
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---@param depth number? How deep to listen for changes
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---@return fun(): nil
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onAnyFieldChange = function(self, callback, depth) end,
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---## EVENT
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---### Register a listener that is triggered ONCE whenever the underlying value changes
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--- Returns a function that can be called to undo the callback
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---@param self ReactiveValue
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---@param callback fun(value: any, type: string)
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---@return fun(): nil
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once = function(self, callback) end,
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---### Setup listeners for all fields of a table recursively
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--- This is used to ensure that listeners are notified recursively
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---@param self ReactiveValue
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_setupAllListenersRecursively = function(self) end,
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---### Setup listeners for a specific field of a table recursively
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--- This is used to ensure that listeners are notified recursively
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---@param self ReactiveValue
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_setupListeners = function(self, key, value, recursive) end,
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---### Notify listeners that the underlying value has changed
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---@param self ReactiveValue
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---@return nil
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---#### Event contains:
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--- 2. value: any - The new value of the changed field
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--- 3. type: string - The type of the new value of the changed field
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_notify = function(self) end,
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---### Notify listeners that a specific field of the underlying value has changed
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---#### Event contains:
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--- 1. field: table<string> - A list of keys that lead to the changed field
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--- 2. value: any - The new value of the changed field
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--- 3. type: string - The type of the new value of the changed field
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---@param self ReactiveValue
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_notifyFieldChanged = function(self, field) end,
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---### Notify listeners that any field of the underlying value has changed
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---#### Event contains:
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--- 1. field: table<string> - A list of keys that lead to the changed field
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--- 2. value: any - The new value of the changed field
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--- 3. type: string - The type of the new value of the changed field
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_notifyAnyFieldChanged = function(self, field) end,
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}
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---### Constructor
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---@param initialValue any
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---@param recursive boolean?
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---@return ReactiveValue
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ReactiveValue.new = function(initialValue, recursive)
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local self = setmetatable({}, metadata)
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self._listeners = {}
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self._fieldListeners = {}
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self._anyFieldListeners = {}
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self._oneTimeListeners = {}
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self._value = initialValue
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self._type = type(initialValue)
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self._recursive = recursive or false
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---@return any
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self.get = function(self) return self._value end
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---@param newValue any
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self.set = function(self, newValue)
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if self._value == newValue then return end
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if type(newValue) ~= self._type then
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error("Expected " .. self._type .. ", got " .. type(newValue))
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return
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end
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self._value = newValue
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self:_notify()
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end
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self.onChange = function(self, callback)
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if type(callback) ~= "function" then
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error("Expected function, got " .. type(callback))
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return function() end
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end
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self._listeners[callback] = true
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return function() self._listeners[callback] = nil end
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end
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self.onFieldChange = function(self, field, callback)
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if type(callback) ~= "function" then
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error("Expected function, got " .. type(callback))
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return function() end
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end
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if self._fieldListeners[field] == nil then self._fieldListeners[field] = {} end
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self._fieldListeners[field][callback] = true
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return function() self._fieldListeners[field][callback] = nil end
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end
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self.onAnyFieldChange = function(self, callback, depth)
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depth = depth or 99999
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if type(callback) ~= "function" then
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error("Expected function, got " .. type(callback))
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return function() end
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end
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if self._anyFieldListeners[depth] == nil then self._anyFieldListeners[depth] = {} end
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self._anyFieldListeners[depth][callback] = true
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return function() self._anyFieldListeners[depth][callback] = nil end
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end
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self.once = function(self, callback)
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if type(callback) ~= "function" then
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error("Expected function, got " .. type(callback))
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return function() end
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end
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self._oneTimeListeners[callback] = true
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return function() self._oneTimeListeners[callback] = nil end
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end
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self._setupAllListenersRecursively = function(self)
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if self._type ~= "table" then return end
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for key, value in pairs(self._value) do
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self:_setupListeners(key, value, true)
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end
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end
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---@param key string
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---@param value any
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---@param recursive boolean?
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self._setupListeners = function(self, key, value, recursive)
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recursive = recursive or false
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if self._type ~= "table" then return end
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if getmetatable(value) ~= getmetatable(self) then return end
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value._recursive = true
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if value._type == "table" then
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value:onAnyFieldChange(function(key2)
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ChangedKey = { key, table.unpack(key2) }
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self:_notifyFieldChanged(ChangedKey)
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self:_notifyAnyFieldChanged(ChangedKey)
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end)
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else
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value:onChange(function(newVal)
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ChangedKey = { key }
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self:_notifyFieldChanged(ChangedKey)
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self:_notifyAnyFieldChanged(ChangedKey)
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end)
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end
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if recursive then value:_setupAllListenersRecursively() end
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end
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if recursive then self:_setupAllListenersRecursively() end
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self._notify = function(self)
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for listener, _ in pairs(self._oneTimeListeners) do
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-- task.spawn(listener, self._value, self._type)
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listener(self._value, self._type)
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self._oneTimeListeners[listener] = nil
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end
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for listener, _ in pairs(self._listeners) do
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-- task.spawn(listener, self._value, self._type)
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listener(self._value, self._type)
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end
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end
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-- TODO: Maybe implement some sort of regex here or something...
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-- Such as listening to *.field1 or something
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-- But this (having to loop over listeners and evaluate some condition) would tank performance
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-- Compared to a simple lookup
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-- So I'm not going to do anything about it for now, until I figure out a better way
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---@param field table<string, string> A list of keys that lead to the changed field
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---@return nil
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self._notifyFieldChanged = function(self, field)
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local value = self._value
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for _, key in ipairs(field) do
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value = value[key]
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end
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local strfield = table.concat(field, ".")
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if self._fieldListeners[strfield] == nil then return end
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for listener, _ in pairs(self._fieldListeners[strfield]) do
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-- task.spawn(listener, value, type(value))
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listener(value, type(value))
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end
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end
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---@param self ReactiveValue
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---@param field table<string, string> A list of keys that lead to the changed field
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---@return nil
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self._notifyAnyFieldChanged = function(self, field)
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local value = self._value
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for _, key in ipairs(field) do
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value = value[key]
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end
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local keyDepth = #field
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for listenerDepth, listeners in pairs(self._anyFieldListeners) do
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if listenerDepth >= keyDepth then
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for listener, _ in pairs(listeners) do
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-- The reason this also returns type(value) is so that clients don't have to compute type(value)
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-- I assume some of them might want to do it so computing it once is probably better than having every client compute it for themselves
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-- task.spawn(listener, field, value, type(value))
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listener(field, value, type(value))
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end
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end
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end
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end
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self._setupComplete = true
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return self
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end
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-- S -- begintest
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-- S local invocations = 0
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-- S -- Integer example
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-- S local test = ReactiveValue.new(1)
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-- S test:onChange(function(value)
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-- S invocations = invocations + 1
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-- S print("test changed to " .. value)
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-- S end)
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-- S test:set(2)
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-- S assert(invocations == 1)
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-- S
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-- S invocations = 0
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-- String example
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-- S test = ReactiveValue.new("test")
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-- S test:onChange(function(value)
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-- S invocations = invocations + 1
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-- S print("test changed to " .. value)
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-- S end)
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-- S test:set("test2")
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-- S assert(invocations == 1)
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-- S
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-- S -- Type safety example
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-- S local res, err = pcall(test.set, test, 1)
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-- S assert(res == false)
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-- S assert(err:find("Expected string, got number"))
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-- S
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-- S -- Table example
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-- S invocations = 0
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-- S test = ReactiveValue.new({1, 2, 3})
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-- S local clbk = test:onChange(function(value)
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-- S invocations = invocations + 1
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-- S print("test changed to")
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-- S dumpTable(value, 0)
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-- S end)
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-- S test:set({1, 2, 3, 4})
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-- S assert(invocations == 1)
|
|
-- S
|
|
-- S -- Callback removal example
|
|
-- S clbk()
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S -- Any field change example
|
|
-- S clbk = test:onAnyFieldChange(function(field, value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test." .. table.concat(field, ".") .. " changed to " .. tostring(value))
|
|
-- S end)
|
|
-- S test.Pero = 1
|
|
-- S test.Pero = nil
|
|
-- S assert(invocations == 2)
|
|
-- S clbk()
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S -- Field change example
|
|
-- S test:onFieldChange("Pero", function(value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test.Pero changed to " .. value)
|
|
-- S end)
|
|
-- S test.Pero = 2
|
|
-- S assert(invocations == 1)
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S -- One time listener example
|
|
-- S test:once(function(value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test changed to")
|
|
-- S dumpTable(value, 0)
|
|
-- S end)
|
|
-- S test:set({3, 2, 1})
|
|
-- S assert(invocations == 1)
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S -- Table push example
|
|
-- S test = ReactiveValue.new({})
|
|
-- S test:onChange(function(value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test changed to")
|
|
-- S dumpTable(value, 0)
|
|
-- S end)
|
|
-- S test:onAnyFieldChange(function(field, value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test." .. table.concat(field, ".") .. " changed to " .. value)
|
|
-- S end)
|
|
-- S test[#test + 1] = 4
|
|
-- S assert(invocations == 2)
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S test = ReactiveValue.new({
|
|
-- S name = "pero",
|
|
-- S coins = ReactiveValue.new(1)
|
|
-- S })
|
|
-- S test.coins:onChange(function(value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test.coins changed to " .. value)
|
|
-- S end)
|
|
-- S test.coins:set(2)
|
|
-- S assert(invocations == 1)
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S test = ReactiveValue.new({
|
|
-- S name = "pero",
|
|
-- S coins = ReactiveValue.new(1)
|
|
-- S }, true)
|
|
-- S test:onAnyFieldChange(function(field, value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test." .. table.concat(field, ".") .. " changed to " .. tostring(value))
|
|
-- S end)
|
|
-- S test.coins:set(2)
|
|
-- S test.pero2 = ReactiveValue.new({})
|
|
-- S test.pero2.coins = ReactiveValue.new(1)
|
|
-- S test.pero2.coins:set(2)
|
|
-- S assert(invocations == 4)
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S test = ReactiveValue.new({
|
|
-- S name = "pero",
|
|
-- S coins = ReactiveValue.new({
|
|
-- S value = ReactiveValue.new(1)
|
|
-- S })
|
|
-- S }, true)
|
|
-- S test:onAnyFieldChange(function(field, value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test." .. table.concat(field, ".") .. " changed to " .. tostring(value))
|
|
-- S end)
|
|
-- S test.coins.value:set(2)
|
|
-- S assert(invocations == 1)
|
|
-- S
|
|
-- S invocations = 0
|
|
-- S test = ReactiveValue.new({}, true)
|
|
-- S test.coins = ReactiveValue.new({})
|
|
-- S test.coins.value = ReactiveValue.new(1)
|
|
-- S test:onAnyFieldChange(function(field, value)
|
|
-- S invocations = invocations + 1
|
|
-- S print("test." .. table.concat(field, ".") .. " changed to " .. tostring(value))
|
|
-- S end)
|
|
-- S test.coins.value:set(3)
|
|
-- S assert(invocations == 1)
|
|
--S
|
|
--S invocations = 0
|
|
--S test = ReactiveValue.new({}, true)
|
|
--S test:onAnyFieldChange(function(field, value)
|
|
--S invocations = invocations + 1
|
|
--S print("test." .. table.concat(field, ".") .. " changed to " .. tostring(value))
|
|
--S end, 1)
|
|
--S test.test2 = ReactiveValue.new({}, true)
|
|
--S test.test2.test3 = ReactiveValue.new(1)
|
|
--S assert(invocations == 1)
|
|
--S
|
|
-- S -- endtest
|
|
end
|
|
|
|
local frame = CreateFrame("Frame")
|
|
frame:RegisterEvent("PLAYER_LOGIN")
|
|
frame:RegisterEvent("PLAYER_ENTERING_WORLD")
|
|
frame:RegisterEvent("GUILD_ROSTER_UPDATE")
|
|
frame:SetScript("OnEvent", function(self, event, ...) Init() end)
|
|
Init()
|