Add parsing for "Your speed is unaffected by Slows" (#700)

* add support for parsing "your speed is unaffected by slows" found on pathfinder and wanderlust

* fixed incorrect behavior of "your speed is unaffected by slows"

* added cap on temporal chains effect when using the "UnaffectedBySlows" tag

* improved readability of calcs.actionSpeedMod, made SumPositiveValues function available via ModStore.lua

---------

Co-authored-by: lJackermeier <lukas.jackermeier@nexis-secure.com>

Author: RealWhimsy

src/Classes/ModStore.lua

@@ -138,6 +138,24 @@ function ModStoreClass:Sum(modType, cfg, ...)
 	return self:SumInternal(self, modType, cfg, flags, keywordFlags, source, ...)
 end
 
+
+--- Returns the value of all positive modifiers to a mod added together, ignoring any negative modifiers.
+--- Works by creating a table using Tabulate and then filtering for positive values.
+---
+--- @param modType string # the mod type for which we want to create the table, e.g. "INC" or "MORE"
+--- @param cfg table | nil # passed configuration, may be nil
+--- @param modName string # the name of the mod for which we want to create the table, e.g. "FlaskRecoveryRate", "ActionSpeed", ...
+function ModStoreClass:SumPositiveValues(modType, cfg, modName, ...)
+	local total = 0
+	local modTable = self:Tabulate(modType, cfg, modName)
+	for i = 1, #modTable do
+		if modTable[i].value > 0 then
+			total = total + modTable[i].value
+		end
+	end
+	return total
+end
+
 function ModStoreClass:More(cfg, ...)
 	local flags, keywordFlags = 0, 0
 	local source

src/Modules/CalcPerform.lua

@@ -748,11 +748,24 @@ local function doActorCharges(env, actor)
 	modDB.multipliers["SpiritCharge"] = output.SpiritCharges
 end
 
+
 function calcs.actionSpeedMod(actor)
 	local modDB = actor.modDB
 	local minimumActionSpeed = modDB:Max(nil, "MinimumActionSpeed") or 0
 	local maximumActionSpeedReduction = modDB:Max(nil, "MaximumActionSpeedReduction")
-	local actionSpeedMod = 1 + (m_max(-data.misc.TemporalChainsEffectCap, modDB:Sum("INC", nil, "TemporalChainsActionSpeed")) + modDB:Sum("INC", nil, "ActionSpeed")) / 100
+	local actionSpeedSum
+    local tempChainsSum
+    
+    -- if we are unaffected by slows, only count the positive modifiers to action speed
+    if modDB:Flag(nil, "UnaffectedBySlows") then
+        actionSpeedSum = modDB:SumPositiveValues("INC", nil, "ActionSpeed")
+        tempChainsSum = modDB:SumPositiveValues("INC", nil, "TemporalChainsActionSpeed")
+    else
+        actionSpeedSum = modDB:Sum("INC", nil, "ActionSpeed")
+        tempChainsSum =  modDB:Sum("INC", nil, "TemporalChainsActionSpeed")
+    end
+    
+    local actionSpeedMod = 1 + (m_max(-data.misc.TemporalChainsEffectCap, tempChainsSum) + actionSpeedSum) / 100
 	actionSpeedMod = m_max(minimumActionSpeed / 100, actionSpeedMod)
 	if maximumActionSpeedReduction then
 		actionSpeedMod = m_min((100 - maximumActionSpeedReduction) / 100, actionSpeedMod)

src/Modules/ModParser.lua

@@ -2782,6 +2782,7 @@ local specialModList = {
 		mod("PhysicalDamageGainAsChaos", "BASE", num, { type = "SkillType", skillType = SkillType.Triggered, neg = true }, { type = "SkillType", skillType = SkillType.Channel, neg = true }, { type = "Condition", var = "UsingAmethystFlask" })
 	} end,
 	["double the number of your poisons that targets can be affected by at the same time"] =  function(num) return { flag("PoisonCanStack"), mod("PoisonStacks", "MORE", 100) } end,
+	["your speed is unaffected by slows"] = { flag("UnaffectedBySlows") },
 	-- Raider
 	["nearby enemies have (%d+)%% less accuracy rating while you have phasing"] = function(num) return { mod("EnemyModifier", "LIST", { mod = mod("Accuracy", "MORE", -num) }, { type = "Condition", var = "Phasing" }) } end,
 	["immun[ei]t?y? to elemental ailments while phasing"] = { flag("ElementalAilmentImmune", { type = "Condition", var = "Phasing" }), },