Module:Citation/CS1/Utilities

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

--[[--< H A S _ A C C E P T _ A S _ W R I T T E N >

When is wholly wrapped in accept-as-written markup, return without markup and true; return and false else

with allow_empty = false, must have at least one character inside the markup with allow_empty = true, the markup frame can be empty like () to distinguish an empty template parameter from the specific condition "has no applicable value" in citation-context.

After further evaluation the two cases might be merged at a later stage, but should be kept separated for now.

]]

local function has_accept_as_written (str, allow_empty) local count; if true == allow_empty then str, count = str:gsub ('^%(%((.*)%)%)$', '%1'); 						-- allows () to be an empty set else str, count = str:gsub ('^%(%((.+)%)%)$', '%1'); end return str, 0 ~= count; end

--[[--< 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 both link and display text is provided, returns a wikilink in the form L|D; if only link is provided (or link and display are the same), 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 not is_set (link) then return '' end

if is_set (display) and link ~= display then return table.concat ({, display, }); else return table.concat ({, link, }); end end

--[[--< S E T _ M E S S A G E >--

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.

TODO: change z.error_categories and z.maintenance_cats to have the form cat_name = true; to avoid dups without having to have an extra cat

]] local added_maint_cats = {}														-- list of maintenance categories that have been added to z.maintenance_cats; TODO: figure out how to delete this table

local function set_message (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'] .. ': ' .. error_id);			-- because missing error handler in Module:Citation/CS1/Configuration

elseif is_set (error_state.category) then if error_state.message then												-- when error_state.message defined, this is an error message table.insert (z.error_categories, error_state.category); else if not added_maint_cats[error_id] then added_maint_cats[error_id] = true;								-- note that we've added this category table.insert (z.maintenance_cats, substitute (error_state.category, arguments));	-- make cat name then add to table end return;																-- because no message, nothing more to do		end 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 z.error_ids['err_citation_missing_title'] and							-- if missing-title error already noted in_array (error_id, {'err_bare_url_missing_title', 'err_trans_missing_title'}) then		-- and this error is one of these return '', false;													-- don't bother because one flavor of missing title is sufficient 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 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 = {}														-- 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

--[[--< 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.

foreign_lang_source and foreign_lang_source_2 keys have a language code appended to them so that multiple languages may be categorized but multiples of the same language are not categorized.

added_prop_cats is a table declared in page scope variables above

]]

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 key = key:gsub ('(foreign_lang_source_?2?)%a%a%a?[%a%-]*', '%1');		-- strip lang code from keyname table.insert (z.properties_cats, substitute (cfg.prop_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  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,  and '' tend to interact poorly under Mediawiki's HTML tidy.

]]

local function safe_for_italics (str) if not is_set (str) then return str end

if str:sub (1, 1) == "'" then str = " " .. str; end if str:sub (-1, -1) == "'" then str = str .. " "; end -- Remove newlines as they break italics. return str:gsub ('\n', ' ');

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

--[[--< M A K E _ S E P _ L I S T >

make a separated list of items using provided separators.  - typically ' '  - typically ' and '  - typically ' and ' or '  & '

defaults to cfg.presentation['sep_list'], cfg.presentation['sep_list_pair'], and cfg.presentation['sep_list_end'] if  is specified,  and  must also be supplied

]]

local function make_sep_list (count, list_seq, sep_list, sep_list_pair, sep_list_end) local list = '';

if not sep_list then														-- set the defaults sep_list = cfg.presentation['sep_list']; sep_list_pair = cfg.presentation['sep_list_pair']; sep_list_end = cfg.presentation['sep_list_end']; end if 2 >= count then list = table.concat (list_seq, sep_list_pair);							-- insert separator between two items; returns list_seq[1] then only one item elseif 2 < count then list = table.concat (list_seq, sep_list, 1, count - 1);					-- concatenate all but last item with plain list separator list = table.concat ({list, list_seq[count]}, sep_list_end);			-- concatenate last item onto end of with final separator end return list; 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 | 1= is an alias of | = 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 for i, v in ipairs (error_list) do			error_list[i] = wrap_style ('parameter', v); end table.insert (error_list, wrap_style ('parameter', selected)); table.insert (z.message_tail, {set_message (error_condition, {make_sep_list (#error_list, error_list)}, 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 whitespace 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 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 whitespace 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

if not str:match ('^%[%^%+%]%]$') then									-- is str some sort of a wikilink (must have some sort of content) return 0, str, '';														-- not a wikilink; return wl_type as 0, str as D, and empty string as L	end L, D = str:match ('^%[%[([^|]+)|([^%]]+)%]%]$');							-- get L and D from L|D

if not is_set (D) then														-- if no separate display D = str:match ('^%[%[([^%]]*)|*%]%]$');									-- get D from D or D| wl_type = 1; end D = mw.text.trim (D, '%s|');												-- trim white space and pipe characters 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 { add_maint_cat = add_maint_cat,												-- exported functions add_prop_cat = add_prop_cat, error_comment = error_comment, has_accept_as_written = has_accept_as_written, in_array = in_array, is_set = is_set, is_wikilink = is_wikilink, make_sep_list = make_sep_list, make_wikilink = make_wikilink, remove_wiki_link = remove_wiki_link, safe_for_italics = safe_for_italics, select_one = select_one, set_message = set_message, set_selected_modules = set_selected_modules, strip_apostrophe_markup = strip_apostrophe_markup, substitute = substitute, wrap_style = wrap_style,

z = z,																		-- exported table }