Módulo:scripts

local export = {}
local Script = {}

function Script:getCode()
	return self._code
end


function Script:getCanonicalName()
	return self._rawData or self._rawData.canonicalName
end


function Script:getDisplayForm()
	return self:getCategoryName("nocap")
end


function Script:getOtherNames(onlyOtherNames)
	return require("Module:language-like").getOtherNames(self, onlyOtherNames)
end


function Script:getAliases()
	return self._rawData.aliases or {}
end


function Script:getVarieties(flatten)
	return require("Module:language-like").getVarieties(self, flatten)
end


function Script:getParent()
	return self._rawData.parent
end

function Script:getSystemCodes()
	return type(self._rawData) == "table" and self._rawData or type(self._rawData) == "string" and {self._rawData} or {}
end

function Script:getSystems()
	if not self._systemObjects then
		local m_systems = require("Module:writing systems")
		self._systemObjects = {}
		
		for _, ws in ipairs(self:getSystemCodes()) do
			table.insert(self._systemObjects, m_systems.getByCode(ws))
		end
	end
	
	return self._systemObjects
end


--function Script:getAllNames()
--	return self._rawData.names
--end


function Script:getType()
	return "script"
end


function Script:getCategoryName(nocap)
	local name = self._rawData or self._rawData.canonicalName
	
	-- If the name already has "code" or "semaphore" in it, don't add it.
	-- No names contain "script".
	if not name:find("ode$") and not name:find("emaphore$") then
		name = name .. " script"
	end
	if not nocap then
		name = mw.getContentLanguage():ucfirst(name)
	end
	return name
end


function Script:makeCategoryLink()
	return "]"
end


function Script:getWikipediaArticle()
	return self._rawData.wikipedia_article or self:getCategoryName()
end


function Script:getCharacters()
	if self._rawData.characters then
		return self._rawData.characters
	else
		return nil
	end
end


function Script:countCharacters(text)
	if not self._rawData.characters then
		return 0
	-- Due to the number of Chinese characters, a different determination method is used when differentiating between traditional ("Hant") and simplified ("Hans") Chinese.
	elseif self:getCode() == "Hant" or self:getCode() == "Hans" then
		local charData, num = self:getCode() == "Hant" and mw.loadData("Module:zh/data/ts").ts or mw.loadData("Module:zh/data/st").st, 0
		for char in text:gmatch("*") do
			if charData then num = num + 1 end
		end
		return num
	else
		local _, num = mw.ustring.gsub(text, "", "")
		return num
	end
end


function Script:hasCapitalization()
	return not not self._rawData.capitalized
end


function Script:isTransliterated()
	if type(self._rawData.translit) == "boolean" then
		return self._rawData.translit
	else
		return true
	end
end


function Script:getDirection()
	return self._rawData.direction
end


function Script:getRawData()
	return self._rawData
end


-- Return true if the script requires fixes to Unciode normalization under certain circumstances.
function Script:hasNormalizationFixes()
	return not not self._rawData.normalizationFixes
end


-- Corrects discouraged sequences of Unicode characters to the encouraged equivalents.
function Script:fixDiscouragedSequences(text)
	if self:hasNormalizationFixes() and self._rawData.normalizationFixes.from then
		local gsub
		for i, from in ipairs(self._rawData.normalizationFixes.from) do
			-- Most of the time, it's faster to check whether mw.ustring.gsub is actually necessary before using it, as it's a lot slower.
			if from:match("*+%-?]") then gsub = mw.ustring.gsub else gsub = string.gsub end
			text = gsub(text, from, self._rawData.normalizationFixes.to or "")
		end
	end
	return text
end


-- Implements a modified form of Unicode normalization for instances where there are identified deficiencies in the default Unicode combining classes.
local function fixNormalization(text, self)
	if self:hasNormalizationFixes() and self._rawData.normalizationFixes.combiningClasses then
		local combiningClassFixes = self._rawData.normalizationFixes.combiningClasses
		local charsToFix = table.concat(require("Module:table").keysToList(combiningClassFixes))
		if mw.ustring.match(text, "") then
			local gsub, codepoint, u = mw.ustring.gsub, mw.ustring.codepoint, mw.ustring.char
			-- Obtain the list of default combining classes.
			local combiningClasses = mw.loadData("Module:scripts/data/combiningClasses")
			-- For each character that needs fixing, find all characters with combining classes equal to or lower than its default class, but greater than its new class (i.e. intermediary characters).
			for charToFix, newCombiningClass in pairs(combiningClassFixes) do
				local intermediaryChars = {}
				for character, combiningClass in pairs(combiningClasses) do
					if newCombiningClass < combiningClass and combiningClass <= combiningClasses then
						table.insert(intermediaryChars, u(character))
					end
				end
				-- Swap the character with any intermediary characters that are immediately before it.
				text = gsub(text, "(+)(" .. charToFix .. ")", "%2%1")
			end
		end
	end
	return text
end

function Script:toFixedNFC(text)
	return fixNormalization(mw.ustring.toNFC(text), self)
end

function Script:toFixedNFD(text)
	return fixNormalization(mw.ustring.toNFD(text), self)
end

function Script:toFixedNFKC(text)
	return fixNormalization(mw.ustring.toNFKC(text), self)
end

function Script:toFixedNFKD(text)
	return fixNormalization(mw.ustring.toNFKD(text), self)
end


function Script:toJSON()
	local ret = {
		canonicalName = self:getCanonicalName(),
		categoryName = self:getCategoryName("nocap"),
		code = self._code,
		otherNames = self:getOtherNames(true),
		aliases = self:getAliases(),
		varieties = self:getVarieties(),
		type = self:getType(),
		direction = self:getDirection(),
		characters = self:getCharacters(),
		parent = self:getParent(),
		systems = self:getSystemCodes(),
		wikipediaArticle = self._rawData.wikipedia_article,
	}
	
	return require("Module:JSON").toJSON(ret)
end


Script.__index = Script


function export.makeObject(code, data)
	return data and setmetatable({ _rawData = data, _code = code, _type = "script object" }, Script) or nil
end


function export.getByCode(code, paramForError, disallowNil)
	if code == nil and not disallowNil then
		return nil
	end
	if code == "IPAchar" then
		require("Module:debug/track")("IPAchar")
	end
	local retval = export.makeObject(code, mw.loadData("Module:scripts/data"))
	if not retval and paramForError then
		require("Module:languages/error")(code, paramForError, "script code", nil, "not real lang")
	end
	return retval
end


function export.getByCanonicalName(name)
	local code = mw.loadData("Module:scripts/by name")
	
	if not code then
		return nil
	end
	
	return export.makeObject(code, mw.loadData("Module:scripts/data"))
end

--[=[
	Takes a codepoint or a character and finds the script code (if any) that is
	appropriate for it based on the codepoint, using the data module
	]. The data module was generated from the
	patterns in ] using ].

	Converts the character to a codepoint. Returns a script code if the codepoint
	is in the list of individual characters, or if it is in one of the defined
	ranges in the 4096-character block that it belongs to, else returns "None".
]=]
function export.charToScript(char)
	return require("Module:scripts/charToScript").charToScript(char)
end


function export.findBestScriptWithoutLang(text)
	return require("Module:scripts/charToScript").findBestScriptWithoutLang(text)
end

return export