Module:ExampleList

local p = {}

-- Used to allow entries to be removed from the table
local function copy(other)
	local res = {}
	for k, v in pairs(other) do
		res[k] = v
	end
	return res
end

-- Expands a template; returns an empty string if an error occurs
local function expand(frame, tname, targs)
	local success, result = pcall(
		frame.expandTemplate,
		frame,
		{title = tname, args = targs}
	)
	if success then
		return result
	else
		return ''
	end
	--return frame:expandTemplate({title = tname, args = args})
end

function p.main(frame)
	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	yesno = require('Module:Yesno')
	local trim = not (yesno(frame:getParent().args.trim or frame:getParent().args._trim, false) == false)  -- Defaults to true
	local args = copy(getArgs(frame, {trim = false, removeBlanks = false}))  -- copy(frame.args)
	for k, v in pairs(args) do
		if type(k) == 'number' then
			v = v
				:gsub('^ *\n+', '')
				:gsub('\n+ *$', '')
			if trim then
				v = v
					:gsub('^ +', '')
					:gsub(' +$', '')
			end
			args[k] = v
		end
	end
	
	local g_alias = args._alias
	local tname = args.t or args._t or args.template or args._template
	local ucFirst = yesno(args.u or args._u, false)
	local opener = args.opener or args._opener
	local sep = args.sep or args._sep
	local prefix = args.prefix or args._prefix
	local postfix = args.postfix or args._postfix
	local style = args.style or args._style
	local syntaxhighlight = args.syntaxhighlight or 'yes'
	local nobr = args.nobr or args._nobr
	local nocat = args.nocat or args._nocat
	local spaced = args.spaced or args._spaced
	local comment_sep = args.comment_sep or args._comment_sep
	local between = args.between or args._between
	local inthemiddle = yesno(args.inthemiddle or args._inthemiddle, false)
	local wide = yesno(args.wide or args._wide, false)
	local class = args.class or args._class
	if not opener then
		if style == 'wikitable' then
			opener = '|-\n| '
		elseif style == 'pre' or style == '*pre' or style == 'pre↓' or style == '*pre↓' then
			opener = ''
			if between == nil and (style == '*pre' or style == '*pre↓') then
				if mw.isSubsting() then
					between = '{{^|3em}}'
				else
					between = '<div style="margin-top:3em"></div>'
				end
			end
		else
			opener = ': '
		end
	end
	if between == nil and (style == 'pre' or style == '*pre' or style == 'pre↓' or style == '*pre↓') then
		if mw.isSubsting() then
			between = '{{^|2em}}'
		else
			between = '<div style="margin-top:2em"></div>'
		end
	end
	
	if tname == '' or tname == nil then  -- If the first parameter is omitted, take the template name from the page title
		local ru = mw.language.new('ru')
		local currentTitle = mw.title.getCurrentTitle().rootText
		if not ucFirst and
			((ru:uc(currentTitle) ~= currentTitle and  -- Titles written entirely in uppercase
				not mw.ustring.match(currentTitle, '^[A-Za-z]+:?[A-Z]')  -- Book:Literary Heritage, TranslateDate
			) or
				#currentTitle == 1
			)
		then
			tname = ru:lcfirst(currentTitle)
		else
			tname = currentTitle
		end
	end
	
	-- Check whether a comment field has been filled in anywhere
	local are_comments = false
	for k, v in pairs(args) do
		local pre_targs = {}
		if type(k) == 'number' then
			if v ~= '' then
				pre_targs = mw.text.split(v, '\\')
				for k2, v2 in pairs(pre_targs) do
					local equals_pos
					if v2:sub(1, 1) == '_' and v2:find('=') then  -- Configuration parameters for the {{Template example}} template
						equals_pos = v2:find('=')
					end
					if equals_pos then
						local param = v2:sub(1, equals_pos - 1)
						if param == '_comment' then are_comments = true end
					end
				end
			end
		end
	end
	
	local content, i = '', 0
	for k, v in pairs(args) do
		local pre_targs, targs = {}, {}
		if type(k) == 'number' then
			i = i + 1
			
			if are_comments then
				targs._comment = ''  -- Default value
			end
			if v ~= '' then
				pre_targs = mw.text.split(v, '\\')
				for k2, v2 in pairs(pre_targs) do
					local equals_pos
					if v2:sub(1, 1) == '_' and v2:find('=') then  -- Configuration parameters for the {{Template example}} template
						equals_pos = v2:find('=')
					end
					if equals_pos then
						local param = v2:sub(1, equals_pos - 1)
						local value = v2:sub(equals_pos + 1)
						targs[param] = value
					else
						if v2:sub(1, 5) == '&#95;' then
							targs[k2] = v2:gsub('&#95;', '_')
						else
							targs[k2] = v2
						end
					end
				end
			end
			-- If a local alias is specified, use it instead of _template and the global alias. (This is the consensus-based implementation; I am not changing it.)
			-- Otherwise, set _template to tname, and set _alias to g_alias if the latter is specified
			-- Example: {{Example Stack|t=Wikipedia:Reliable sources/Perennial sources/Status|_alias=/Status|...}} gives
			-- <code>{{/Status|...}}</code> → {{Wikipedia:Reliable sources/Perennial sources/Status|...}}
			local targs_tname = targs._alias
			local local_alias = nil
			if not targs_tname then
				targs_tname = tname
				local_alias = g_alias
			end
			
			targs._sep, targs._style, targs._nobr, targs._nocat, targs._spaced, targs._comment_sep, targs._template, targs._alias = sep, style, nobr,
			nocat, spaced, comment_sep, targs_tname, local_alias

			targs._syntaxhighlight = syntaxhighlight
				
			if not targs._prefix then
				targs._prefix = prefix
			end
			if not targs._postfix then
				targs._postfix = postfix
			end
			local adjusted_opener
			if style == 'pre' and opener == '*' and targs._before == nil then
				adjusted_opener = ''
				targs._style = '*pre'
			else
				if style == 'pre' and opener == '*' then
					if mw.isSubsting() then
						targs._before = targs._before .. '{{^|-0.5em}}'
					else
						targs._before = targs._before .. '<div style="margin-top:-0.5em"></div>'
					end
				end
				adjusted_opener = opener == '*' and '* ' or opener
			end
			--[[if not targs._style then
				targs._style = style
			end]]
			
			local exampleCode
			if mw.isSubsting() then
				exampleCode = '{{Template example'
				for name, value in pairs(targs) do
					if type(name) == 'number' then
						exampleCode = exampleCode .. '|' .. value
					else
						exampleCode = exampleCode .. '|' .. name .. '=' .. value
					end
				end
				exampleCode = exampleCode .. '}}'
			else
				exampleCode = tostring(expand(frame, 'Template example', targs))
			end
			
			content = content .. (i ~= 1 and (between and between .. '\n' or '\n') or '') .. adjusted_opener .. exampleCode
		end
	end
	if style == 'wikitable' then
		local table_content = ''
		if not inthemiddle then
			table_content = '{| class="wikitable '
			if wide then table_content = table_content .. 'wide' end
			if class then table_content = table_content .. class end
			table_content = table_content .. '"\n! scope="col" | Code !! scope="col" | Result'
			if are_comments then table_content = table_content .. ' !! Comment' end
		end
		content = table_content .. '\n' .. content
		if not inthemiddle then
			content = content .. '\n|}'
		end
	end
	
	return content
end

return p