Documentation for this module may be created at Module:Experience/doc

--
-- All functions relating to experience needed etc
-- 

local p = {}
local commas = require('Module:Addcommas')

local NormalXPAtLevel = mw.loadData('Module:Experience/data')
local NormalXPAtLevelUnr = mw.loadData('Module:Experience/dataunr')
local EliteXPAtLevel = mw.loadData('Module:Experience/elitedata')
local EliteXPAtLevelUnr = mw.loadData('Module:Experience/elitedataunr')

--
-- Returns lowest needed XP to have required level
-- [[Template:XP]]
-- 
function p.xp_at_level(frame)
	local level = tonumber(frame.args[1])
	local XPAtLevel = NormalXPAtLevel
	if frame.args.elite == '1' then
		XPAtLevel = EliteXPAtLevel
	end
	

	-- calling tonumber on a string returns nil
	if not level then
		 return "You must pass numbers as arguments"
	end

	return XPAtLevel[level]
end

-- Same as above, but with the 120/150 level cap removed

function p.xp_at_level_unr(frame)
	local level = tonumber(frame.args[1])
	local XPAtLevelUnr = NormalXPAtLevelUnr
	if frame.args.elite == '1' then
		XPAtLevelUnr= EliteXPAtLevelUnr
	end

	-- calling tonumber on a string returns nil
	if not level then
		 return "You must pass numbers as arguments"
	end

	return XPAtLevelUnr[level]
end

--
-- The maximum amount of experience you can have at a given level
-- [[Template:Max XP for level]]
--
function p.max_xp_at_level(frame)
	local level = tonumber(frame.args[1])
	local XPAtLevel = NormalXPAtLevel
	if frame.args.elite == '1' then
		XPAtLevel = EliteXPAtLevel
	end

	-- calling tonumber on a string returns nil
	if not level then
		 return "You must pass numbers as arguments"
	end

	if level == -1 then
		return 0
	elseif level <= 0 or level > 120 then
		return "Value must be in the range 1 - 120"
	-- Highest level is 120, highest XP is 200M
	elseif (level == 120) then
		return 200000000
	end

	-- Just in case
	level = math.floor(level)

	-- Return XP required for the *next* level minus 1
	local xp_at_next = XPAtLevel[level + 1]
	return xp_at_next - 1
end

--
-- What level you have when at a given xp
-- [[Template:Level]]
--
function p.level_at_xp(frame)
	local xp = frame.args[1]
	local XPAtLevel = NormalXPAtLevel
	if frame.args.elite == '1' then
		XPAtLevel = EliteXPAtLevel
	end

	-- just in case
	if type(xp) == 'string' then
		 xp = commas._strip(xp)
		 xp = tonumber(xp)
	end

	-- calling tonumber on an empty string returns nil
	if not xp then
		 return "You must pass numbers as arguments"
	end

	if xp < 0 or xp > 200000000 then
		return "Value must be in the range 0 - 200,000,000"
	end
	
	local level
	for i=120,1,-1 do
		if (XPAtLevel[i]<= xp) then
			level = i
			break
		end
	end
	
	return level
end

-- Same as above, but with the 120/150 level cap removed

function p.level_at_xp_unr(frame)
	local xp = frame.args[1]
	local XPAtLevelUnr = NormalXPAtLevelUnr
	if frame.args.elite == '1' then
		XPAtLevelUnr = EliteXPAtLevelUnr
	end

	-- just in case
	if type(xp) == 'string' then
		 xp = commas._strip(xp)
		 xp = tonumber(xp)
	end

	-- calling tonumber on a string returns nil
	if not xp then
		 return "You must pass numbers as arguments"
	end

	if xp == -1 then
		return 0
	elseif xp < 0 or xp > 200000000 then
		return "Value must be in the range 0 - 200,000,000"
	end
	
	local level
	for i=126,1,-1 do
		if (XPAtLevelUnr[i]<= xp) then
			level = i
			break
		end
	end
	
	return level
end

--
-- Experience needed to obtain a level from a given amount of xp
-- If current xp is greater than target, returns 0
-- [[Template:XP to Level]]
--
function p.xp_to_level(frame)
	local xp = frame.args[1]
	local target = tonumber(frame.args[2])
	local XPAtLevel = NormalXPAtLevel
	if frame.args.elite == '1' then
		XPAtLevel = EliteXPAtLevel
	end

	-- just in case
	if type(xp) == 'string' then
		 xp = commas._strip(xp)
		 xp = tonumber(xp)
	end

	if (xp < 0 or xp > 200000000) then
		return "XP value must be in the range 0 - 200,000,000"
	end

	if (target < 2 or target > 120) then
		return "Level value must be in the range 2 - 120"
	end

	-- calling tonumber on a string returns nil
	if not xp or not target then
		 return "You must pass numbers as arguments"
	end

	local target_xp = XPAtLevel[target]

	if (xp >= target_xp) then
		return 0
	else
		return target_xp - xp
	end
end

--
-- Experience between two levels; will always return absolute value
-- [[Template:XP level to level]]
--
function p.level_to_level(frame)
	local level1 = tonumber(frame.args[1])
	local level2 = tonumber(frame.args[2])
	local XPAtLevel = NormalXPAtLevel
	if frame.args.elite == '1' then
		XPAtLevel = EliteXPAtLevel
	end

	-- just in case
	if type(level1) == 'string' then
		 level1 = commas._strip(level1)
		 level1 = tonumber(level1)
	end

	if type(level2) == 'string' then
		 level2 = commas._strip(level2)
		 level2 = tonumber(level2)
	end

	if not level1 or not level2 then
		 return "You must pass numbers as arguments"
	end

	local difference = XPAtLevel[level1]- XPAtLevel[level2]
	difference = math.abs(difference)
	return difference
end

-- Same as above, but with the 120/150 level cap removed

function p.level_to_level_unr(frame)
	local level1 = tonumber(frame.args[1])
	local level2 = tonumber(frame.args[2])
	local XPAtLevelUnr = NormalXPAtLevelUnr
	if frame.args.elite == '1' then
		XPAtLevelUnr = EliteXPAtLevelUnr
	end

	-- just in case
	if type(level1) == 'string' then
		 level1 = commas._strip(level1)
		 level1 = tonumber(level1)
	end

	if type(level2) == 'string' then
		 level2 = commas._strip(level2)
		 level2 = tonumber(level2)
	end

	if not level1 or not level2 then
		 return "You must pass numbers as arguments"
	end

	local difference = XPAtLevelUnr[level1]- XPAtLevelUnr[level2]
	difference = math.abs(difference)
	return difference
end

return p
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