Module:Citation/CS1/Utilities

    From Nonbinary Wiki
    < Module:Citation/CS1
    Revision as of 11:05, 3 September 2019 by wikipedia>Trappist the monk (sync from sandbox;)

    Documentation for this module may be created at Module:Citation/CS1/Utilities/doc

    
    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
    };
    
    
    --[[--------------------------< F O R W A R D   D E C L A R A T I O N S >--------------------------------------
    ]]
    
    local cfg;																		-- table of tables imported from selected Module:Citation/CS1/Configuration
    
    
    --[[--------------------------< I S _ S E T >------------------------------------------------------------------
    
    Returns true if argument is set; false otherwise. Argument is 'set' when it exists (not nil) or when it is not an empty string.
    
    ]]
    
    local function is_set( var )
    	return not (var == nil or var == '');
    end
    
    
    --[[--------------------------< I N _ A R R A Y >--------------------------------------------------------------
    
    Whether needle is in haystack
    
    ]]
    
    local function in_array( needle, haystack )
    	if needle == nil then
    		return false;
    	end
    	for n,v in ipairs( haystack ) do
    		if v == needle then
    			return n;
    		end
    	end
    	return false;
    end
    
    
    --[[--------------------------< S U B S T I T U T E >----------------------------------------------------------
    
    Populates numbered arguments in a message string using an argument table.
    
    ]]
    
    local function substitute( msg, args )
    	return args and mw.message.newRawMessage( msg, args ):plain() or msg;
    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 substitute( hidden and cfg.presentation['hidden-error'] or cfg.presentation['visible-error'], content );
    end
    
    
    --[=[-------------------------< M A K E _ W I K I L I N K >----------------------------------------------------
    
    Makes a wikilink; when bot link and display text is provided, returns a wikilink in the form [[L|D]]; if only
    link is provided, returns a wikilink in the form [[L]]; if neither are provided or link is omitted, returns an
    empty string.
    
    ]=]
    
    local function make_wikilink (link, display)
    	if is_set (link) then
    		if is_set (display) then
    			return table.concat ({'[[', link, '|', display, ']]'});
    		else
    			return table.concat ({'[[', link, ']]'});
    		end
    	else
    		return '';
    	end
    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 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
    		error( cfg.messages['undefined_error'] );								-- because missing error handler in Module:Citation/CS1/Configuration
    	elseif is_set( error_state.category ) then
    		table.insert( z.error_categories, error_state.category );
    	end
    	
    	local message = substitute( error_state.message, arguments );
    
    	message = table.concat (
    		{
    		message,
    		' (',
    		make_wikilink (
    			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
    
    
    --[[-------------------------< 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 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 = {}														-- list of maintenance categories that have been added to z.maintenance_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
    
    
    --[[--------------------------< S A F E _ F O R _ I T A L I C S >----------------------------------------------
    
    Protects a string that will be wrapped in wiki italic markup '' ... ''
    
    Note: We cannot use <i> for italics, as the expected behavior for italics specified by ''...'' in the title is that
    they will be inverted (i.e. unitalicized) in the resulting references.  In addition, <i> and '' tend to interact
    poorly under Mediawiki's HTML tidy.
    
    ]]
    
    local function safe_for_italics( str )
    	if not is_set(str) then
    		return str;
    	else
    		if str:sub(1,1) == "'" then str = "<span></span>" .. str; end
    		if str:sub(-1,-1) == "'" then str = str .. "<span></span>"; end
    		
    		-- Remove newlines as they break italics.
    		return str:gsub( '\n', ' ' );
    	end
    end
    
    
    --[[--------------------------< W R A P _ S T Y L E >----------------------------------------------------------
    
    Applies styling to various parameters.  Supplied string is wrapped using a message_list configuration taking one
    argument; protects italic styled parameters.  Additional text taken from citation_config.presentation - the reason
    this function is similar to but separate from wrap_msg().
    
    ]]
    
    local function wrap_style (key, str)
    	if not is_set( str ) then
    		return "";
    	elseif in_array( key, { 'italic-title', 'trans-italic-title' } ) then
    		str = safe_for_italics( str );
    	end
    
    	return substitute( cfg.presentation[key], {str} );
    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);
    		table.insert( z.message_tail, { set_error( error_condition, {error_str}, true ) } );
    	end
    	
    	return value, selected;
    end
    
    
    --[=[-------------------------< R E M O V E _ W I K I _ L I N K >----------------------------------------------
    
    Gets the display text from a wikilink like [[A|B]] or [[B]] gives B
    
    The str:gsub() returns either A|B froma [[A|B]] or B from [[B]] or B from B (no wikilink markup).
    
    In l(), l:gsub() removes the link and pipe (if they exist); the second :gsub() trims white space from the label
    if str was wrapped in wikilink markup.  Presumably, this is because without wikimarkup in str, there is no match
    in the initial gsub, the replacement function l() doesn't get called.
    
    ]=]
    
    local function remove_wiki_link (str)
    	return (str:gsub( "%[%[([^%[%]]*)%]%]", function(l)
    		return l:gsub( "^[^|]*|(.*)$", "%1" ):gsub("^%s*(.-)%s*$", "%1");
    	end));
    end
    
    
    --[=[-------------------------< I S _ W I K I L I N K >--------------------------------------------------------
    
    Determines if str is a wikilink, extracts, and returns the the wikilink type, link text, and display text parts.
    If str is a complex wikilink ([[L|D]]):
    	returns wl_type 2 and D and L from [[L|D]];
    if str is a simple wikilink ([[D]])
    	returns wl_type 1 and D from [[D]] and L as empty string;
    if not a wikilink:
    	returns wl_type 0, str as D, and L as empty string.
    
    trims leading and trailing white space and pipes from L and D ([[L|]] and [[|D]] are accepted by MediaWiki and
    treated like [[D]]; while [[|D|]] is not accepted by MediaWiki, here, we accept it and return D without the pipes).
    
    ]=]
    
    local function is_wikilink (str)
    	local D, L
    	local wl_type = 2;															-- assume that str is a complex wikilink [[L|D]]
    
    	L, D = str:match ('^%[%[([^|]+)|([^%]]+)%]%]$');							-- get L and D from [[L|D]] 
    
    	if not is_set (D) then														-- if no separate link
    		D = str:match ('^%[%[([^%]]*)|*%]%]$');									-- get D from [[D]]
    		wl_type = 1; 
    	end
    	
    	if not is_set (D) then														-- no wikilink markup
    		D = str;																-- return the string as D
    		wl_type = 0;															-- but say that it is not a wikilink
    	end
    	
    	D = mw.text.trim (D, '%s|');												-- trim white space and pipe characters 
    	L = L and mw.text.trim (L, '%s|');
    	
    	return wl_type, D, L or '';
    end
    
    
    --[[--------------------------< S T R I P _ A P O S T R O P H E _ M A R K U P >--------------------------------
    
    Strip wiki italic and bold markup from argument so that it doesn't contaminate COinS metadata.
    This function strips common patterns of apostrophe markup.  We presume that editors who have taken the time to
    markup a title have, as a result, provided valid markup. When they don't, some single apostrophes are left behind.
    
    Returns the argument without wiki markup and a number; the number is more-or-less meaningless except as a flag
    to indicate that markup was replaced; do not rely on it as an indicator of how many of any kind of markup was
    removed; returns the argument and nil when no markup removed
    
    ]]
    
    local function strip_apostrophe_markup (argument)
    	if not is_set (argument) then
    		return argument, nil;													-- no argument, nothing to do
    	end
    
    	if nil == argument:find ( "''", 1, true ) then								-- Is there at least one double apostrophe?  If not, exit.
    		return argument, nil;
    	end
    
    	local flag;
    	while true do
    		if argument:find ( "'''''", 1, true ) then								-- bold italic (5)
    			argument, flag=argument:gsub("%'%'%'%'%'", "");						-- remove all instances of it
    		elseif argument:find ( "''''", 1, true ) then							-- italic start and end without content (4)
    			argument, flag=argument:gsub("%'%'%'%'", "");
    		elseif argument:find ( "'''", 1, true ) then							-- bold (3)
    			argument, flag=argument:gsub("%'%'%'", "");
    		elseif argument:find ( "''", 1, true ) then								-- italic (2)
    			argument, flag=argument:gsub("%'%'", "");
    		else
    			break;
    		end
    	end
    
    	return argument, flag;														-- done
    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)
    	cfg = cfg_table_ptr;
    	
    end
    
    
    --[[--------------------------< E X P O R T S >----------------------------------------------------------------
    ]]
    
    return {
    	is_set = is_set,															-- exported functions
    	in_array = in_array,
    	substitute = substitute,
    	error_comment = error_comment,
    	set_error = set_error,
    	select_one = select_one,
    	add_maint_cat = add_maint_cat,
    	wrap_style = wrap_style,
    	safe_for_italics = safe_for_italics,
    	remove_wiki_link = remove_wiki_link,
    	is_wikilink = is_wikilink,
    	make_wikilink = make_wikilink,
    	set_selected_modules = set_selected_modules,
    	strip_apostrophe_markup = strip_apostrophe_markup,
    	z = z,																		-- exported table
    	}