Editing Module:Character info

local m_unicode = require('Module:Unicode data')
local char_to_script = require('Module:scripts').charToScript

local export = {}

local dingbat_scripts = {
	["Zsym"] = true;
	["Zmth"] = true;
	["Zyyy"] = true;
}

local function page_exists(title)
	local ok, title_obj = pcall(mw.title.new, title)
	if ok and title_obj then
		local ok, exists = pcall(function() return title_obj.exists end)
		return ok and exists
	else
		return false
	end
end

function export.exotic_symbol_warning(frame)
	local title = mw.title.getCurrentTitle()
	if title.exists then
		return ""
	end
	if mw.ustring.len(title.fullText) ~= 1 then
		return ""
	end
	
	local codepoint = mw.ustring.codepoint(title.fullText)
	local script_code = char_to_script(codepoint)

	if dingbat_scripts[script_code] then
		return frame:expandTemplate { title = "editnotice-exotic symbols" }
	end

	return ""
end

local function get_codepoint(codepoint, param_name)
	if codepoint then
		codepoint = mw.text.trim(codepoint)
		codepoint = tonumber(codepoint) or mw.text.decode(codepoint)
		if (type(codepoint) == "string") and (mw.ustring.len(codepoint) == 1) then
			codepoint = mw.ustring.codepoint(codepoint)
		elseif type(codepoint) ~= "number" then
			error("Unrecognised string given for the " .. param_name
				.. " parameter")
		end
	end
	return codepoint
end

function export._show(args, parent_title)
	local codepoint = args.codepoint or args[1] or "";
	local image
	local title = mw.title.getCurrentTitle()
	local to_boolean = require('Module:yesno')
	local namespace = mw.title.getCurrentTitle().nsText

	if codepoint ~= "" then
		codepoint = get_codepoint(codepoint, "codepoint")
	else
		if title.fullText == parent_title then
			codepoint = 0xfffd
		elseif mw.ustring.len(title.fullText) == 1 then
			codepoint = mw.ustring.codepoint(title.fullText)
		else
			if title.nsText == "Template" then return "" end
			error("Page title is not a single Unicode character")
		end
	end

	args.image = args.image and mw.text.trim(args.image)
	if args.image == "" then
		image = nil
	else
		image = args.image or m_unicode.lookup_image(codepoint)
	end

	local table_markup = {}
	table.insert(table_markup,
		'{| class="wikitable floatright" style="width:25em;"\n')

	if image then
		if not image:match("\127") then -- <hiero> tags generate these; pass them through
			if image:match("^%[?%[?[Ff]ile:") or image:match("^%[?%[?[Ii]mage:") then
				image = image:gsub("^%[%[", ""):gsub("^[Ff]ile:", ""):gsub("^[Ii]mage:", ""):gsub("|.*", ""):gsub("]]", "")
			end
			local category = "[[Category:Character boxes with images|*" .. string.format("%010d", codepoint) .. "]]"
			image = "[[File:" .. image .. "|120x140px]]"
			if namespace == "" then
				--image = image .. category
			end
		end

		table.insert(table_markup,
			('|-\n| colspan="2" style="text-align: center;" | %s<br/>%s\n'):format(
				image, args.caption or ""
			)
		)
	elseif args.caption then
		table.insert(table_markup,
			('|-\n| colspan="2" style="text-align: center;" | %s\n'):format(
				args.caption
			)
		)
	end

	local script_code = args.sc or char_to_script(codepoint)
	local script_data = mw.loadData("Module:scripts/data")[script_code]
		or error("No data for script code " .. script_code .. ".")
	local script_name = script_data[1]

	local NAMESPACE = title.namespace

	local cat_name
	if not args.nocat and ((NAMESPACE == 0) or (NAMESPACE == 100)) then -- main and Appendix
		if script_data.character_category ~= nil then
			-- false means no category, overriding the default below
			cat_name = script_data.character_category or nil
		elseif script_name then
			cat_name = script_name .. " script characters"
		end
	end

	local block_name = mw.text.encode(args.block or m_unicode.lookup_block(codepoint))

	local aliases
	if args.aliases == "" then
		aliases = nil
	else
		aliases = mw.loadData('Module:Unicode data/aliases')[codepoint]
	end

	local function parse_aliases(aliases)

		local result = {}

		if aliases then
			local classif = {}
			for i, alias in ipairs(aliases) do
				if not classif[alias[1]] then
					classif[alias[1]] = {}
				end
				table.insert(classif[alias[1]], mw.text.encode(alias[2]))
			end

			if classif.correction then
				for i, name in ipairs(classif.correction) do
					local category = '[[Category:Character boxes with corrected names]]'
					if namespace == "" then
						table.insert(result,
							('[[Category:Character boxes with corrected names]]Corrected: %s'):format(
								name
							)
						)
					else
						table.insert(result,
							('Corrected: %s'):format(
								name
							)
						)
					end
				end
			end

			if classif.alternate then
				for i, name in ipairs(classif.alternate) do
					local category = '[[Category:Character boxes with alternative names]]'
					if namespace == "" then
						table.insert(result,
							('[[Category:Character boxes with alternative names]]Alternative: %s'):format(
								name
							)
						)
					else
						table.insert(result,
							('Alternative: %s'):format(
								name
							)
						)
					end
				end
			end

			if classif.abbreviation then
				local category = '[[Category:Character boxes with abbreviations]]'
				if namespace == "" then
					table.insert(result,
						('[[Category:Character boxes with abbreviations]]Abbreviation: %s'):format(
							table.concat(classif.abbreviation, ", ")
						)
					)
				else
					table.insert(result,
						('Abbreviation: %s'):format(
							table.concat(classif.abbreviation, ", ")
						)
					)
				end
			end

			local parsed_result = table.concat(result, ", ")

			return '<div>(' .. parsed_result .. ')</div>'

		end

		return ""

	end

	local li, vi, ti = nil, nil, nil

	if block_name == "Hangul Syllables" then
		local m_Kore = require('Module:ko-hangul')
		li, vi, ti = m_Kore.syllable2JamoIndices(codepoint)
	end

	local initial_to_letter = { [0] =
		0x3131, 0x3132, 0x3134, 0x3137, 0x3138, 0x3139, 0x3141, 0x3142,
		0x3143, 0x3145, 0x3146, 0x3147, 0x3148, 0x3149, 0x314A, 0x314B,
		0x314C, 0x314D, 0x314E,
	}
		
	local vowel_to_letter = { [0] =
		0x314F, 0x3150, 0x3151, 0x3152, 0x3153, 0x3154, 0x3155, 0x3156,
		0x3157, 0x3158, 0x3159, 0x315A, 0x315B, 0x315C, 0x315D, 0x315E,
		0x315F, 0x3160, 0x3161, 0x3162, 0x3163,
	}
		
	local final_to_letter = {
		0x3131, 0x3132, 0x3133, 0x3134, 0x3135, 0x3136, 0x3137, 0x3139, 
		0x313A, 0x313B, 0x313C, 0x313D, 0x313E, 0x313F, 0x3140, 0x3141, 
		0x3142, 0x3144, 0x3145, 0x3146, 0x3147, 0x3148, 0x314A, 0x314B, 
		0x314C, 0x314D, 0x314E, -- KIYEOK-RIEUL = ???
	}

	local function parse_composition()

		local result = nil

		if block_name == "Hangul Syllables" then
	
			result = ((ti ~= 0) and
				'<big class="Kore" lang="">[[&#%u;]] + [[&#%u;]] + [[&#%u;]]</big>' or
				'<big class="Kore" lang="">[[&#%u;]] + [[&#%u;]]</big>'):format(
					initial_to_letter[li],
					vowel_to_letter[vi],
					final_to_letter[ti]
				)

		else
			local nfd = mw.ustring.toNFD(mw.ustring.char(codepoint))
			if mw.ustring.len(nfd) ~= 1 then
				local compo = {}
	
				for nfdcp in mw.ustring.gcodepoint(nfd)	do

					local dotted_circle = (m_unicode.is_combining(nfdcp) and "◌" or "")
					local link_target = m_unicode.get_entry_title(nfdcp)
					if not link_target or not page_exists(link_target) then
						link_target = nil
					end
					
					local script = char_to_script(nfdcp)

					local character_text =
						link_target and ('[[&#%u;|<span class="%s">%s&#%u;</span> &#91;U+%04X&#93;]]')
									:format(nfdcp, script, dotted_circle, nfdcp, nfdcp)
						or ('<span class="%s">%s&#%u;</span> &#91;U+%04X&#93;')
									:format(script, dotted_circle, nfdcp, nfdcp)
					
					table.insert(compo, '<span class="character-sample-secondary">' .. character_text .. '</span> ')
				end
			
				result = table.concat(compo, " + ")

			end
		end

		if result then
			return "Composition", result, "[[Category:Character boxes with compositions]]"
		end

		return nil

	end

	-- [[ Egyptian Hieroglyphs
	local function parse_gardiner()

		local result = nil

		if args.gardiner then

			result =
			(
				'[http://vincent.euverte.free.fr/Rosette/Rosette_410.php?Hiero=%s&Lang=E %s]\n'):format(
				args.gardiner, args.gardiner
			)

			return "Gardiner number", result, "[[Category:Character boxes with additional information for Egyptian Hieroglyphs]]"
		end

		return nil

	end

	local function parse_mdc()

		local result = nil

		if args.mdc then

			result = args.mdc

			return "Manuel de Codage", result, "[[Category:Character boxes with additional information for Egyptian Hieroglyphs]]"
		end

		return nil

	end

	local function parse_egpz()

		local result = nil

		if args.egpz then

			result = args.egpz

			return "EGPZ 1.0", result, "[[Category:Character boxes with additional information for Egyptian Hieroglyphs]]"
		end

		return nil

	end

	-- ]]

	local function middle_part()

		local rows = {}

		local function insert_row(row_title, row_contents, row_category)

			if row_contents then
				
				table.insert(rows,
					('<tr><td style="text-align: left">%s:</td><td>%s%s</td></tr>'):format(row_title, row_contents, row_category))

			end

		end

		insert_row(parse_composition())
		insert_row(parse_gardiner())
		insert_row(parse_egpz())
		insert_row(parse_mdc())

		if rows[1] then

			return ('<table style="margin: 0 auto;">%s</table>')
				:format(table.concat(rows, ""))

		end

		return ""

	end

	local function present_codepoint(codepoint, np, script, combining, name, printable, title)
		local display
		local link_target
		
		if combining then
			combining = to_boolean(combining)
		else
			combining = m_unicode.is_combining(codepoint)
		end
		
		if printable then
			printable = to_boolean(printable)
		else
			printable = m_unicode.is_printable(codepoint)
		end
		
		local char = mw.ustring.char(codepoint)
		if title == "self" or page_exists(char) then
			link_target = char
		elseif title ~= "" then
			link_target = m_unicode.get_entry_title(codepoint)
		end

		if printable then
			display = ('<span class="character-sample-secondary %s">%s&#x%04X;</span>'):format(
				script or char_to_script(codepoint),
				combining and "◌" or "", codepoint
			)
		end
		
		local arrow_and_maybe_char
		if np then
			arrow_and_maybe_char = (display or "") .. ' →'
		else
			arrow_and_maybe_char = '← ' .. (display or "")
		end
		
		local text = ('<span title="%s">%s<br><small>[U+%04X]</small></span>')
			:format(mw.text.encode(name or m_unicode.lookup_name(codepoint)),
				arrow_and_maybe_char, codepoint)
		
		if link_target then
			return ('[[' .. link_target .. '|' .. text .. ']]')
		else
			return text
		end
	end

	local function get_next(codepoint, step)
		-- Skip past noncharacters and reserved characters (Cn), private-use
		-- characters (Co), surrogates (Cs), and control characters (Cc), all
		-- of which have a label beginning in "<" rather than a proper name.
		if step < 0 and 0 < codepoint or step > 0 and codepoint < 0x10FFFF then
			repeat
				codepoint = codepoint + step
			until m_unicode.lookup_name(codepoint):sub(1, 1) ~= "<"
				or not (0 < codepoint and codepoint < 0x10FFFF)
		end

		return codepoint
	end

	local previous_codepoint =
		get_codepoint(args.previous_codepoint, "previous_codepoint")
		and tonumber(args.previous_codepoint, 16) or get_next(codepoint, -1)
	local next_codepoint = get_codepoint(args.next_codepoint, "next_codepoint")
		and tonumber(args.next_codepoint, 16) or get_next(codepoint, 1)

	local combining
	if args.combining then
		combining = to_boolean(args.combining)
	else
		combining = m_unicode.is_combining(codepoint)
	end
	
	table.insert(table_markup,
		'|-\n| style="width: 70px;" colspan="2" | ' ..
		'<table>' ..
		'<tr>' ..
		'<td>' ..
			('<span class="character-sample-primary %s">%s&#%u;</span>')
				:format(script_code, combining and "◌" or "", codepoint) ..
		'</td>' ..
		'<td>' ..
			(' [https://util.unicode.org/UnicodeJsps/character.jsp?a=%.4X U+%.4X]'):format(codepoint, codepoint) ..
			', [[w:List of XML and HTML character entity references|&amp;#' .. codepoint .. ';]]\n' ..
		'<div class="character-sample-name">' ..
		mw.text.encode(args.name or m_unicode.lookup_name(codepoint)) ..
		'</div>' ..
		parse_aliases(aliases) ..
		'</td>' ..
		'</tr>' ..
		'</table>'
	)

	table.insert(table_markup,
		middle_part()
	)

	local previous_unassigned_first = previous_codepoint + 1
	local previous_unassigned_last = codepoint - 1
	local next_unassigned_first = codepoint + 1
	local next_unassigned_last = next_codepoint - 1

	local left_unassigned_text
	local right_unassigned_text

	if previous_codepoint == 0 then
		previous_unassigned_first = 0
	end

	if previous_unassigned_first <= previous_unassigned_last or next_unassigned_first <= next_unassigned_last then
		if previous_unassigned_first < previous_unassigned_last then
			left_unassigned_text = ('[unassigned: U+%.4X–U+%.4X]'):format(previous_unassigned_first, previous_unassigned_last)
		elseif previous_unassigned_first == previous_unassigned_last then
			left_unassigned_text = ('[unassigned: U+%.4X]'):format(previous_unassigned_first)
		end

		if next_unassigned_first < next_unassigned_last then
			right_unassigned_text = ('[unassigned: U+%.4X–U+%.4X]'):format(next_unassigned_first, next_unassigned_last)
		elseif next_unassigned_first == next_unassigned_last then
			right_unassigned_text = ('[unassigned: U+%.4X]'):format(next_unassigned_first)
		end
	end
	
	local unassignedsRow = 
		mw.html.create('table'):css('width', '100%'):css('font-size', '80%'):css('white-space', 'nowrap')
			:tag('tr')
				:tag('td'):css('width', '50%'):css('text-align', 'left'):wikitext(left_unassigned_text or ''):done()
				:tag('td'):css('width', '50%'):css('text-align', 'right'):wikitext(right_unassigned_text or ''):done()
			:allDone()
	table.insert(table_markup, tostring(unassignedsRow) ..'\n')
	
	local previous_codepoint_text = ""
	local next_codepoint_text = ('%s\n')
		:format(present_codepoint(next_codepoint, true,
			args.next_codepoint_sc, args.next_codepoint_combining,
			args.next_codepoint_name, args.next_codepoint_printable,
			args.next_codepoint_title))

	if previous_codepoint > 0 then
		previous_codepoint_text = ('%s\n')
			:format(present_codepoint(previous_codepoint, false,
				args.previous_codepoint_sc, args.previous_codepoint_combining,
				args.previous_codepoint_name, args.previous_codepoint_printable,
				args.previous_codepoint_title))
	end

	--Here we're assuming that "Block name (Unicode block)" exists as either the name of the article or a redirect.
	--It would be nicer if we could check if the page title "Block name (Unicode block)" actually exists and pipe the link if it does and otherwise just link [[%s]].
	--It would seem the page_exists function should work for this, but AJ is too stupid to get that to work.
	local block_name_text = ('[[%s (Unicode block)|%s]]') --on wiktionary this is ('[[Appendix:Unicode/%s|%s]]').
		:format(block_name, block_name)
	if namespace == "" then
		block_name_text = block_name_text .. ('[[Category:%s block|*%010d]]\n')
		:format(block_name, codepoint)
	else
		block_name_text = block_name_text .. '\n'
	end
	
	local lastRow = 
		mw.html.create('table'):css('width', '100%'):css('text-align', 'center')
			:tag('tr')
				:tag('td'):css('width', '20%'):wikitext(previous_codepoint_text):done()
				--:tag('td'):css('width', '15%')
				--	:tag('span'):wikitext(left_unassigned_text and "'''...'''" or ""):attr('title', left_unassigned_text or ""):done():done()
				:tag('td'):css('width', '60%'):css('font-size', '110%'):css('font-weight', 'bold'):wikitext(block_name_text)
				--:tag('td'):css('width', '15%')
				--	:tag('span'):wikitext(right_unassigned_text and "'''...'''" or ""):attr('title', right_unassigned_text or ""):done():done()
				:tag('td'):css('width', '20%'):wikitext(next_codepoint_text):done()
			:allDone()
	
	table.insert(table_markup, tostring(lastRow) ..'\n')

	table.insert(table_markup, '|}')

	if cat_name and namespace == "" then
		table.insert(table_markup, "[[Category:" .. cat_name .. "| " .. mw.ustring.char(codepoint) .. "]]")
	end
	
	table.insert(table_markup, require("Module:TemplateStyles")("User:Alexis Reggae/Character info template/styles.css"))

	return table.concat(table_markup)
end

function export.show(frame)
	local parent_frame = frame:getParent()
	return export._show(parent_frame.args, parent_frame:getTitle())
end

return export