LibFlyable.lua

--[[--------------------------------------------------------------------
	LibFlyable
	Replacement for the IsFlyableArea API function in World of Warcraft.
	Author : Phanx <addons@phanx.net>
	License: Public Domain
	This is free and unencumbered software released into the public domain.
	https://github.com/phanx-wow/LibFlyable
	https://wow.curseforge.com/projects/libflyable
----------------------------------------------------------------------]]
-- TODO: Wintergrasp (mapID 501) status detection? Or too old to bother with?

local MAJOR, MINOR = "LibFlyable", 3
assert(LibStub, MAJOR.." requires LibStub")
local lib, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
if not lib then return end

----------------------------------------
-- Data
----------------------------------------

local spellForContinent = {
	-- Continents/instances requiring a spell to fly:
	-- Draenor Pathfinder
	[1116] = 191645, -- Draenor
	[1464] = 191645, -- Tanaan Jungle
	[1152] = 191645, -- FW Horde Garrison Level 1
	[1330] = 191645, -- FW Horde Garrison Level 2
	[1153] = 191645, -- FW Horde Garrison Level 3
	[1154] = 191645, -- FW Horde Garrison Level 4
	[1158] = 191645, -- SMV Alliance Garrison Level 1
	[1331] = 191645, -- SMV Alliance Garrison Level 2
	[1159] = 191645, -- SMV Alliance Garrison Level 3
	[1160] = 191645, -- SMV Alliance Garrison Level 4
	-- Broken Isles Pathfinder
	[1220] = 233368, -- Broken Isles

	-- Unflyable continents/instances where IsFlyableArea returns true:
	[1191] = -1, -- Ashran (PvP)
	[1265] = -1, -- Tanaan Jungle Intro
	[1463] = -1, -- Helheim Exterior Area
	[1500] = -1, -- Broken Shore (scenario for DH Vengeance artifact)
	[1669] = -1, -- Argus (mostly OK, few spots are bugged)

	-- Unflyable class halls where IsFlyableArea returns true:
	-- Note some are flyable at the entrance, but not inside;
	-- flying serves no purpose here, so we'll just say no.
	[1519] = -1, -- The Fel Hammer (Demon Hunter)
	[1514] = -1, -- The Wandering Isle (Monk)
	[1469] = -1, -- The Heart of Azeroth (Shaman)
	[1107] = -1, -- Dreadscar Rift (Warlock)
	[1479] = -1, -- Skyhold (Warrior)
}

local noFlySubzones = {
	-- Unflyable subzones where IsFlyableArea() returns true:
	["Nespirah"] = true, ["Неспира"] = true, ["네스피라"] = true, ["奈瑟匹拉"] = true, ["奈斯畢拉"] = true,
}

----------------------------------------
-- Logic
----------------------------------------

local GetInstanceInfo = GetInstanceInfo
local GetSubZoneText = GetSubZoneText
local IsFlyableArea = IsFlyableArea
local IsSpellKnown = IsSpellKnown

function lib.IsFlyableArea()
	if not IsFlyableArea()
	or noFlySubzones[GetSubZoneText() or ""] then
		return false
	end

	local _, _, _, _, _, _, _, instanceMapID = GetInstanceInfo()
	local reqSpell = spellForContinent[instanceMapID]
	if reqSpell then
		return reqSpell > 0 and IsSpellKnown(reqSpell)
	end

	return IsSpellKnown(34090) or IsSpellKnown(34091) or IsSpellKnown(90265)
end