模組:Citation/CS1/Error

此模組的說明文件可於模組:Citation/CS1/Error/doc建立

--[[--------------------------< F O R W A R D   D E C L A R A T I O N S >--------------------------------------
]]
local z = {
	error_categories = {};														-- for categorizing citations that contain errors
	error_ids = {};
	message_tail = {};
	maintenance_cats = {};														-- for categorizing citations that aren't erroneous per se, but could use a little work
	properties_cats = {};														-- for categorizing citations based on certain properties, language of source for instance
};
local cfg;
local in_array, is_set, substitute, wrap_style;
local make_internal_link;

--[[--------------------------< T H R O W _ E R R O R >-------------------------------------------------------

Terminate the program with a pre-defined excuse.

]]

local function throw_error (arg)
	error (cfg.internal_errors[arg]);
end

--[[--------------------------< E R R O R _ C O M M E N T >----------------------------------------------------

Wraps error messages with css markup according to the state of hidden.

]]
local function error_comment (content, hidden)
	return wrap_style (hidden and 'hidden-error' or 'visible-error', content);
end

--[[--------------------------< S E T _ E R R O R >--------------------------------------------------------------

Sets an error condition and returns the appropriate error message.  The actual placement of the error message in the output is
the responsibility of the calling function.

]]

local added_error_cats = {};

local function set_error (error_id, arguments, raw, prefix, suffix)
	local error_state = cfg.error_conditions[error_id];
	
	prefix = prefix or '';
	suffix = suffix or '';
	
	if error_state == nil then
		throw_error ('undefined_error');
	elseif is_set (error_state.category) then
		local category = substitute (error_state.category, arguments);
		if not added_error_cats[error_id] then
			table.insert (z.error_categories, category)
			added_error_cats[error_id] = true;									-- note that we've added this category
		end
	end
	
	local message = substitute (error_state.message, arguments);
	
	message = table.concat (
		{
		message,
		' (',
		make_internal_link (
			table.concat (
				{
				cfg.messages['help page link'],
				'#',
				error_state.anchor
				}),
			cfg.messages['help page label']),
		')'
		});
	
	z.error_ids[error_id] = true;
	if in_array (error_id, {'bare_url_missing_title', 'trans_missing_title'})
			and z.error_ids['citation_missing_title'] then
		return '', false;
	end
	
	message = table.concat ({prefix, message, suffix});
	
	if raw == true then
		return message, error_state.hidden;
	end		
		
	return error_comment (message, error_state.hidden);
end

--[[--------------------------< A P P E N D _ E R R O R >--------------------------------------------------------

Sets an error condition, then appends the appropriate error message to z.message_tail.

]]

local function append_error (error_id, arguments, prefix, suffix)
	table.insert (z.message_tail, {set_error (error_id, arguments, true, prefix, suffix)});
end

--[[-------------------------< I S _ A L I A S _ U S E D >-----------------------------------------------------

This function is used by select_one() to determine if one of a list of alias parameters is in the argument list
provided by the template.

Input:
	args – pointer to the arguments table from calling template
	alias – one of the list of possible aliases in the aliases lists from Module:Citation/CS1/Configuration
	index – for enumerated parameters, identifies which one
	enumerated – true/false flag used to choose how enumerated aliases are examined
	value – value associated with an alias that has previously been selected; nil if not yet selected
	selected – the alias that has previously been selected; nil if not yet selected
	error_list – list of aliases that are duplicates of the alias already selected

Returns:
	value – value associated with alias we selected or that was previously selected or nil if an alias not yet selected
	selected – the alias we selected or the alias that was previously selected or nil if an alias not yet selected

]]

local function is_alias_used (args, alias, index, enumerated, value, selected, error_list)
	if enumerated then															-- is this a test for an enumerated parameters?
		alias = alias:gsub ('#', index);										-- replace '#' with the value in index
	else
		alias = alias:gsub ('#', '');											-- remove '#' if it exists
	end

	if is_set (args[alias]) then													-- alias is in the template's argument list
		if value ~= nil and selected ~= alias then								-- if we have already selected one of the aliases
			local skip;
			for _, v in ipairs (error_list) do									-- spin through the error list to see if we've added this alias
				if v == alias then
					skip = true;
					break;														-- has been added so stop looking 
				end
			end
			if not skip then													-- has not been added so
				table.insert (error_list, alias);								-- add error alias to the error list
			end
		else
			value = args[alias];												-- not yet selected an alias, so select this one
			selected = alias;
		end
	end
	return value, selected;														-- return newly selected alias, or previously selected alias
end

--[[--------------------------< A D D _ M A I N T _ C A T >------------------------------------------------------

Adds a category to z.maintenance_cats using names from the configuration file with additional text if any.
To prevent duplication, the added_maint_cats table lists the categories by key that have been added to z.maintenance_cats.

]]
local added_maint_cats = {};
local function add_maint_cat (key, arguments)
	if not added_maint_cats [key] then
		added_maint_cats [key] = true;											-- note that we've added this category
		table.insert (z.maintenance_cats, substitute (cfg.maint_cats [key], arguments));
																				-- make name then add to table
	end
end

--[[--------------------------< A D D _ P R O P _ C A T >--------------------------------------------------------

Adds a category to z.properties_cats using names from the configuration file with additional text if any.

]]

local added_prop_cats = {}														-- list of property categories that have been added to z.properties_cats
local function add_prop_cat (key, arguments)
	if not added_prop_cats [key] then
		added_prop_cats [key] = true;											-- note that we've added this category
		table.insert (z.properties_cats, substitute (cfg.prop_cats [key], arguments));		
																				-- make name then add to table
	end
end

--[[--------------------------< S E L E C T _ O N E >----------------------------------------------------------

Chooses one matching parameter from a list of parameters to consider.  The list of parameters to consider is just
names.  For parameters that may be enumerated, the position of the numerator in the parameter name is identified
by the '#' so |author-last1= and |author1-last= are represented as 'author-last#' and 'author#-last'.

Because enumerated parameter |<param>1= is an alias of |<param>= we must test for both possibilities.


Generates an error if more than one match is present.

]]

local function select_one (args, aliases_list, error_condition, index)
	local value = nil;															-- the value assigned to the selected parameter
	local selected = '';														-- the name of the parameter we have chosen
	local error_list = {};

	if index ~= nil then index = tostring (index); end

	for _, alias in ipairs (aliases_list) do									-- for each alias in the aliases list
		if alias:match ('#') then												-- if this alias can be enumerated
			if '1' == index then												-- when index is 1 test for enumerated and non-enumerated aliases
				value, selected = is_alias_used (args, alias, index, false, value, selected, error_list);	-- first test for non-enumerated alias
			end
			value, selected = is_alias_used (args, alias, index, true, value, selected, error_list);		-- test for enumerated alias
		else
			value, selected = is_alias_used (args, alias, index, false, value, selected, error_list);		--test for non-enumerated alias
		end
	end

	if #error_list > 0 and 'none' ~= error_condition then						-- for cases where this code is used outside of extract_names()
		local error_str = '';
		for _, k in ipairs (error_list) do
			if error_str ~= '' then error_str = error_str .. cfg.messages['parameter-separator'] end
			error_str = error_str .. wrap_style ('parameter', k);
		end
		if #error_list > 1 then
			error_str = error_str .. cfg.messages['parameter-final-separator'];
		else
			error_str = error_str .. cfg.messages['parameter-pair-separator'];
		end
		error_str = error_str .. wrap_style ('parameter', selected);
		append_error (error_condition, {error_str});
	end
	
	return value, selected;
end

--[[--------------------------< M A K E _ E R R O R _ T A I L >--------------------------------------------------

The function generates error/maintenance-related messages and/or tracking categories from "z" defined in this module.

]]

local function make_error_tail (flag)
	local error_text = '';
	if #z.message_tail ~= 0 then
		error_text = ' ';
		for i,v in ipairs (z.message_tail) do
			if is_set (v[1]) then
				if i == #z.message_tail then
					error_text = error_text .. error_comment (v[1], v[2]);
				else
					error_text = error_text .. error_comment (v[1] .. '; ', v[2]);
				end
			end
		end
	end

	if #z.maintenance_cats ~= 0 then
		local maintenance_text = '';
		for _, v in ipairs (z.maintenance_cats) do								-- append maintenance categories
			maintenance_text = maintenance_text .. substitute (cfg.messages['maintenance-item'], {v, make_internal_link (':Category:' .. v, cfg.messages['maintenance-link'])})
		end
		error_text = error_text .. wrap_style ('maintenance', maintenance_text);
																				-- maintenance mesages (realy just the names of the categories for now)
	end
	
	if not flag then
		for _, v in ipairs (z.error_categories) do
			error_text = error_text .. make_internal_link ('Category:' .. v);
		end
		for _, v in ipairs (z.maintenance_cats) do								-- append maintenance categories
			error_text = error_text .. make_internal_link ('Category:' .. v);
		end
		for _, v in ipairs (z.properties_cats) do								-- append maintenance categories
			error_text = error_text .. make_internal_link ('Category:' .. v);
		end
	end
	return error_text;
end

--[[--------------------------< R E S E T _ E R R O R >-------------------------------------------------------

Reset error/maintenance messages/categories in z.

]]

local function reset_error (args)
	if (in_array ('err_cats', args)) then
		z.error_categories = {};
	end
	if (in_array ('prop_cats', args)) then
		z.properties_cats = {};
	end
	if (in_array ('maint_cats', args)) then
		z.maintenance_cats = {};
	end
	if (in_array ('err_ids', args)) then
		z.error_ids = {};
	end
	if (in_array ('msg_tail', args)) then
		z.message_tail = {};
	end
end

--[[--------------------------< S E T _ S E L E C T E D _ M O D U L E S >--------------------------------------

Sets local cfg table to same (live or sandbox) as that used by the other modules.

]]

local function set_selected_modules (cfg_table_ptr, utilities_page_ptr, links_page_ptr)
	cfg = cfg_table_ptr;
	
	in_array = utilities_page_ptr.in_array;
	is_set = utilities_page_ptr.is_set;
	substitute = utilities_page_ptr.substitute;
	wrap_style= utilities_page_ptr.wrap_style;
	
	make_internal_link = links_page_ptr.make_internal_link;
	
end

--[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------
]]

return {
	add_maint_cat = add_maint_cat,												-- exported functions
	add_prop_cat = add_prop_cat,
	append_error = append_error,
	make_error_tail = make_error_tail,
	reset_error = reset_error,
	select_one = select_one,
	set_error = set_error,
	throw_error = throw_error,
	
	set_selected_modules = set_selected_modules
	}