Add a new trigger type statustrigger

StatusTrigger will trigger if a status activates (or reaches a certain
activation # of auras). This is an abstraction provided by AuraList
which keeps track of which auras belong to which statuses.

Added type annotations to all touched files

src/OmicronFrames.toc

@@ -11,6 +11,7 @@ types/types.lua
 types/object.lua
 types/triggers/trigger.lua
 types/triggers/auratrigger.lua
+types/triggers/statustrigger.lua
 types/statusbar.lua
 types/auralist.lua
 types/indicators/indicator.lua

src/types/auralist.lua

@@ -16,9 +16,9 @@
 -- Omicron Frames. If not, see <https://www.gnu.org/licenses/>. 
 local omi = select(2, ...)
 local types = omi.GetModule("types")
-local AuraTrigger = types.AuraTrigger
 
 --- AuraList keeps track of all the auras attached to a unitframe
+---@class AuraList: Object
 local AuraList = types.CreateClass("AuraList")
 types.AuraList = AuraList
 
@@ -67,9 +67,16 @@ local function ForEachAura(unit, fn)
     ForEachAuraFiltered(unit, "HARMFUL", fn)
 end
 
---- Initialize AuraList
+
--- unitframe
+---@return AuraList
---      The unitframe this list belongs to
+function AuraList.new(cls, ...)
+    --- I really dislike duplicating this everywhere but it makes
+    --lua-language-server able to deduce the type of Object:new calls and that
+    --is honestly worth it
+    return types.Object.new(cls, ...)
+end
+
+---@param unitframe UnitFrame
 function AuraList:Init(unitframe)
     self.unitframe = unitframe
     self.unit = unitframe.unit
@@ -80,22 +87,29 @@ function AuraList:Init(unitframe)
 
     self.triggers = {}
     self.triggersBySpell = {}
+    self.triggersByStatus = {}
 end
 
---- Add an AuraTrigger to this AuraList
+---@param trigger AuraTrigger | StatusTrigger
--- trigger
---      an AuraTrigger object
 function AuraList:AddTrigger(trigger)
     table.insert(self.triggers, trigger)
     local spellId = trigger.spellId
+    local status = trigger.status
+    if spellId then
         if self.triggersBySpell[spellId] == nil then
             self.triggersBySpell[spellId] = {}
         end
         table.insert(self.triggersBySpell[spellId], trigger)
+    else
+        if self.triggersByStatus[status] == nil then
+            self.triggersByStatus[status] = {}
+        end
+        table.insert(self.triggersByStatus[status], trigger)
+    end
 end
 
 ---Reset the AuraList and do a full aura scan on the unit
--- This also resets all the triggers that are attached to this AuraList
+---This also resets all the triggers that are attached to this AuraList
 function AuraList:Reset()
     self.auras = {}
 
@@ -110,9 +124,7 @@ function AuraList:Reset()
     end)
 end
 
---- Add an aura to the AuraList
+---@param aura UnitAuraInfo
--- aura
---      A UnitAuraInfo table for a newly added aura
 function AuraList:AddAura(aura)
     local statusChanged = false
     self.auras[aura.auraInstanceID] = aura
@@ -126,6 +138,7 @@ function AuraList:AddAura(aura)
         else
             count[status] = count[status] + 1
         end
+        self:UpdateStatusTriggers(status)
     end
 
     for _, trigger in ipairs(self.triggersBySpell[aura.spellId] or {}) do
@@ -136,9 +149,20 @@ function AuraList:AddAura(aura)
     return statusChanged
 end
 
---- Return a sequence table with all status names that match the given aura
+---@param status string
--- aura
+function AuraList:UpdateStatusTriggers(status)
---      A UnitAuraInfo table
+    local triggers = self.triggersByStatus[status]
+    if not triggers then
+        return
+    end
+    local count = self.statusCount[status] or 0
+    for _, trigger in ipairs(triggers) do
+        trigger:UpdateStatus(count)
+    end
+end
+
+---@param aura UnitAuraInfo
+---@return string[] All status names associated with this aura
 function AuraList:GetStatusForAura(aura)
     local status = {}
     if aura.dispelName and aura.isHarmful then
@@ -152,9 +176,7 @@ function AuraList:GetStatusForAura(aura)
     return status
 end
 
---- Add an aura to the AuraList
+---@param aura UnitAuraInfo
--- aura
---      A UnitAuraInfo table for a newly added aura
 function AuraList:UpdateAura(aura)
     for _, trigger in ipairs(self.triggersBySpell[aura.spellId] or {}) do
         trigger:UpdateAura(self.auras[aura.auraInstanceId], aura)
@@ -162,9 +184,7 @@ function AuraList:UpdateAura(aura)
     self.auras[aura.auraInstanceID] = aura
 end
 
---- Remove an aura from the AuraList
+---@param iid number
--- iid
---      The instance id for a removed aura
 function AuraList:RemoveAura(iid)
     local aura = self.auras[iid]
     if aura == nil then
@@ -184,6 +204,7 @@ function AuraList:RemoveAura(iid)
         else
             count[status] = count[status] - 1
         end
+        self:UpdateStatusTriggers(status)
     end
 
     for _, trigger in ipairs(self.triggersBySpell[aura.spellId] or {}) do
@@ -192,9 +213,7 @@ function AuraList:RemoveAura(iid)
     return statusChanged
 end
 
---- Update an aura in the AuraList
+---@param info UnitAuraInfo
--- info
---      The new UnitAuraInfo structure
 function AuraList:Update(info)
     local GetAuraDataByAuraInstanceID = C_UnitAuras.GetAuraDataByAuraInstanceID
     local statusChanged = false

src/types/triggers/statustrigger.lua

@@ -0,0 +1,53 @@
+-- Copyright 2023 <omicron.me@protonmail.com>
+--
+-- This file is part of Omicron Frames
+-- 
+-- Omicron Frames is free software: you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the Free
+-- Software Foundation, either version 3 of the License, or (at your option)
+-- any later version.
+--
+-- Omicron Frames is distributed in the hope that it will be useful, but
+-- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+-- more details.
+--
+-- You should have received a copy of the GNU General Public License along with
+-- Omicron Frames. If not, see <https://www.gnu.org/licenses/>. 
+local omi = select(2, ...)
+local types = omi.GetModule("types")
+---@class Trigger
+local Trigger = types.Trigger
+
+---StatusTrigger is a trigger that can be attached to AuraList as datasource
+---@class StatusTrigger: Trigger
+---@field status string
+local StatusTrigger = types.CreateClass("StatusTrigger", Trigger)
+types.StatusTrigger = StatusTrigger
+
+---@return StatusTrigger
+function StatusTrigger.new(cls, ...)
+    --- I really dislike duplicating this everywhere but it makes
+    --lua-language-server able to deduce the type of Object:new calls and that
+    --is honestly worth it
+    return types.Object.new(cls, ...)
+end
+
+--- Initialize a new AuraTrigger object
+---@param status string The kind of status to trigger on
+---@param requiredCount number | nil 
+---@param invert boolean | nil
+function StatusTrigger:Init(status, requiredCount, invert)
+    Trigger.Init(self, invert)
+    self.status = status
+    self.requiredCount = requiredCount or 1
+    self.invert = invert or false
+    self.active = invert
+end
+
+--- Inform the trigger about a changed status
+-- status:
+--      Must be a valid UnitAuraInfo
+function StatusTrigger:UpdateStatus(count)
+    self:SetState(count >= self.requiredCount)
+end

src/types/unitframe.lua

@@ -16,13 +16,22 @@
 -- Omicron Frames. If not, see <https://www.gnu.org/licenses/>. 
 local omif = select(2, ...)
 local types = omif.GetModule("types")
+
+---@class StatusBar
 local StatusBar = types.StatusBar
+
+---@class AuraList
 local AuraList = types.AuraList
+
+---@class SquareIndicator
 local SquareIndicator = types.SquareIndicator
 
 ---@class AuraTrigger
 local AuraTrigger = types.AuraTrigger
 
+---@class StatusTrigger
+local StatusTrigger = types.StatusTrigger
+
 ---@class UnitFrame
 local UnitFrame = types.CreateClass("UnitFrame")
 types.UnitFrame = UnitFrame
@@ -47,6 +56,8 @@ local colors = {
     white = {1.0, 1.0, 1.0}
 }
 
+---@param unit string
+---@param config table
 function UnitFrame:Init(unit, config)
     local width = config.size.width
     local height = config.size.height
@@ -85,8 +96,8 @@ end
 function UnitFrame:CreateTriggers(triggers)
     for _, trigger in ipairs(triggers) do
         local kind = trigger.kind
-        if kind == "AuraTrigger" then
         local indicator = self:CreateIndicator(trigger.indicator)
+        if kind == "AuraTrigger" then
             local at = AuraTrigger:new(
                     trigger.spellId,
                     trigger.own,
@@ -95,6 +106,10 @@ function UnitFrame:CreateTriggers(triggers)
             )
             at:SetTarget(indicator)
             self.auras:AddTrigger(at)
+        elseif kind == "StatusTrigger" then
+            local st = StatusTrigger:new(trigger.status, trigger.requiredCount, trigger.invert)
+            st:SetTarget(indicator)
+            self.auras:AddTrigger(st)
         end
     end
 end