Module:Footnotes

require('Module:No globals');

--[[--------------------------< A R G S _ D E F A U L T >------------------------------------------------------

a table to specify initial values.

]]

local args_default = { bracket_left = , bracket_right = , bracket_year_left = , bracket_year_right = , postscript = , page = , pages = , location = , page_sep = ", p. ", pages_sep = ", pp. ", ref = , };

--[[--------------------------< I S _ Y E A R >----------------------------------------------------------------

evaluates param to see if it is one of these forms with or without lowercase letter disambiguator: YYYY n.d. nd c. YYYY YYYY–YYYY (separator is endash)

return true when param has a recognized form; false else

]]

local function is_year (param) return param:match ('^%d%d%d%d?%l?$') or param:match ('^n%.d%.%l?$') or param:match ('^nd%l?$') or param:match ('^c%. %d%d%d%d?%l?$') or param:match ('^%d%d%d%d–%d%d%d%d%l?$'); end

--[[--------------------------< C O R E >----------------------------------------------------------------------

returns an anchor link (CITEREF) formed from one to four author names, year, and insource location (|p=, |pp=, loc=)

]]

local function core( args ) local result;

if args.P5 ~= then if is_year (args.P5) then result = table.concat ({args.P1, ' et al. ', args.bracket_year_left, args.P5, args.bracket_year_right}); else args.P5 = ; -- when P5 not a year don't include in anchor result = table.concat ({args.P1, ' et al.'}); -- and don't render it end

elseif args.P4 ~= then if is_year (args.P4) then result = table.concat ({args.P1, ', ', args.P2, ' & ', args.P3, ' ', args.bracket_year_left, args.P4, args.bracket_year_right}); -- three names and a year else result = table.concat ({args.P1, ' et al.'}); -- four names end

elseif args.P3 ~= then if is_year (args.P3) then result = table.concat ({args.P1, ' & ', args.P2, ' ', args.bracket_year_left, args.P3, args.bracket_year_right}); -- two names and a year else result = table.concat ({args.P1, ', ', args.P2, ' ', ' & ', args.P3}); -- three names end

elseif args.P2 ~= then if is_year (args.P2) then result = table.concat ({args.P1, ' ', args.bracket_year_left, args.P2, args.bracket_year_right}); -- one name and year else result = table.concat ({args.P1, ' & ', args.P2}); -- two names end

else result = args.P1; -- one name end -- when author-date result ends with a dot (typically when the last positional parameter holds 'n.d.') -- and when no in-source location (no |p=, |pp=, or |loc=) -- and when the first or only character in args.postscript is a dot -- remove the author-date result trailing dot -- the author-date result trailing dot will be replaced later with the content of args.postscript (usually a dot) if ('.' == result:sub(-1)) and ('.' == args.postscript:sub(1)) and ( == args.page) and ( == args.pages) and ( == args.location) then result = result:gsub ('%.$', ); end

if args.ref ~= 'none' then if args.ref ~= then result = table.concat ({'', result, ''}); else result = table.concat ({'[[#CITEREF', mw.uri.anchorEncode (table.concat ({args.P1, args.P2, args.P3, args.P4, args.P5})), '|', result, ']]'}); end end

if args.page ~= then result = table.concat ({result, args.page_sep, args.page}); elseif args.pages ~= then result = table.concat ({result, args.pages_sep, args.pages}); end

if args.location ~= then result = table.concat ({result, ', ', args.location}); end

result = table.concat ({args.bracket_left, result, args.bracket_right, args.postscript}):gsub ('%s+', ' '); -- strip redundant spaces return result; end

--[[--------------------------< A R G S _ F E T C H >---------------------------------------------------------

Because all of the templates share a common set of parameters, a single common function to fetch those parameters from frame and parent frame.

]]

local function args_fetch (frame, ps) local args = args_default; -- create a copy of the default table local pframe = frame:getParent(); -- point to the template's parameter table

for k, v in pairs (frame.args) do -- override defaults with values provided in the #invoke: if any args[k] = v; end

args.postscript = pframe.args.postscript or pframe.args.ps or ps; if 'none' == args.postscript then args.postscript = ; end args.page = pframe.args.p or pframe.args.page or ; args.pages = pframe.args.pp or pframe.args.pages or ; args.location = pframe.args.loc or ; args.ref = pframe.args.ref or pframe.args.Ref or ;

for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- loop through the five positional parameters and trim if set else empty string args[v] = (pframe.args[i] and mw.text.trim (pframe.args[i])) or ; end

return args; end

--[[--------------------------< H A R V A R D _ C I T A T I O N >----------------------------------------------

common entry point for: ([[#CITEREF|]]) aka ([[#CITEREF|]]) [[#CITEREF|]] aka [[#CITEREF|]] ([[#CITEREF|]]) [[#CITEREF|]] [[#CITEREF|]] [[#CITEREF|]] aka [[#CITEREF|]] ]]

Distinguishing features (brackets and page separators) are specified in this module's {{#invoke}} in the respective templates.

local function harvard_citation (frame) local args = args_fetch (frame, ); -- get the template and invoke parameters; default postscript is empty string

return core (args); end

--[[--------------------------< S T R I P _ U R L >------------------------------------------------------------

used by sfn() and sfnm(). This function fixes an issue with reference tooltip gadget where the tooltip is not displayed when an insource locator (|p=, |pp=, |loc=) has an external wikilink that contains a # character

strip uri-reserved characters from urls in |p=, |pp-, and |loc= parameters The researved characters are: !#$&'()*+,/:;=?@[]

]]

local function strip_url (pages) local escaped_uri; if not pages or ( == pages) then return pages; end

for uri in pages:gmatch ('%[(%a[%w%+%.%-]*://%S+)') do -- for each external link get the uri escaped_uri = uri:gsub ("([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" ); -- save a copy with lua pattern characters escaped uri = uri:gsub ("[!#%$&'%(%)%*%+,/:;=%?@%[%]%.%%]", ); -- remove reserved characters and '%' because '%20' (space character) is a lua 'invalid capture index' pages = pages:gsub (escaped_uri, uri, 1); -- replace original uri with the stripped version end

return pages; end

--[[--------------------------< S F N >------------------------------------------------------------------------

entry point for and

]]

local function sfn (frame) local args = args_fetch (frame, '.'); -- get the template and invoke parameters; default postscript is a dot

local result = core (args); -- go make a CITEREF anchor

-- put it all together and then strip redundant spaces local name = table.concat ({'FOOTNOTE', args.P1, args.P2, args.P3, args.P4, args.P5, strip_url (args.page), strip_url (args.pages), strip_url (args.location)}):gsub ('%s+', ' ');

return frame:extensionTag ({name='ref', args={name=name}, content=result});

end

--[[--------------------------< S F N M >----------------------------------------------------------------------

common entry point for and

Distinguishing features (brackets) are specified in this module's {{#invoke}} in the respective templates.

]]

local function sfnm (frame) local args = args_default; -- create a copy of the default table local pframe = frame:getParent(); -- point to the template's parameter table

local n = 1; -- index of source; this is the 'n' in na1, ny, etc local first_pnum = 1; -- first of a pair of positional parameters local second_pnum = 2; -- second of a pair of positional parameters

local last_ps = 0; -- index of the last source with |nps= set local last_index = 0; -- index of the last source; these used to determine which of |ps= or |nps= will terminate the whole rendering

local out = {}; -- table to hold rendered sources local footnote = {'FOOTNOTE'}; -- all author, date, insource location stuff becomes part of the reference's footnote id; added as we go

for k, v in pairs (frame.args) do -- override defaults with values provided in the #invoke: if any args[k] = v; end

while true do if not pframe.args[table.concat ({n, 'a1'})] and not pframe.args[first_pnum] then break; -- no na1 or matching positional parameter so done end

if pframe.args[table.concat ({n, 'a1'})] then -- does this source use named parameters? for _, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- initialize for this source args[v] = ; end

for i, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- extract author and year parameters for this source args[v] = pframe.args[table.concat ({n, 'a', i})] or ; -- attempt to assign author name if == args[v] then -- when there wasn't an author name args[v] = pframe.args[table.concat ({n, 'y'})] or ; -- attempt to assign year break; -- done with author/date for this source end end

else -- this source uses positional parameters args.P1 = mw.text.trim (pframe.args[first_pnum]); -- yes, only one author supported args.P2 = (pframe.args[second_pnum] and mw.text.trim (pframe.args[second_pnum])) or ; -- when positional author, year must also be positional

for _, v in ipairs ({'P3', 'P4', 'P5'}) do -- blank the rest of these for this source args[v] = ; end

first_pnum = first_pnum + 2; -- source must use positional author and positional year second_pnum = first_pnum + 1; -- bump these for possible next positional source end

args.postscript = pframe.args[table.concat ({n, 'ps'})] or ; if 'none' == args.postscript then -- this for compatibility with other footnote templates; does nothing args.postscript = ; end

args.ref = pframe.args[table.concat ({n, 'ref'})] or ; -- alternate reference for this source

args.page = pframe.args[table.concat ({n, 'p'})] or ; -- insource locations for this source args.pages = pframe.args[table.concat ({n, 'pp'})] or ; args.location = pframe.args[table.concat ({n, 'loc'})] or ;

table.insert (out, core (args)); -- save the rendering of this source

for k, v in ipairs ({'P1', 'P2', 'P3', 'P4', 'P5'}) do -- create the FOOTNOTE id if ~= args[v] then table.insert (footnote, args[v]); end end for k, v in ipairs ({'page', 'pages', 'location'}) do -- these done separately so that we can strip uri-reserved characters from extlinked page numbers if ~= args[v] then table.insert (footnote, strip_url (args[v])) end end

last_index = n; -- flags used to select terminal postscript from nps or from end_ps if ~= args.postscript then last_ps = n; end

n = n+1; -- bump for the next one end

local name = table.concat (footnote):gsub ('%s+', ' '); -- put the footnote together and strip redundant space

args.end_ps = pframe.args.postscript or pframe.args.ps or '.'; -- this is the postscript for the whole not for the individual sources if 'none' == args.end_ps then -- not an original sfnm parameter value; added for compatibility with other footnote templates args.end_ps = ; end

local result = table.concat ({table.concat (out, '; '), (last_index == last_ps) and or args.end_ps}); return frame:extensionTag ({name='ref', args={name=name}, content=result}); end

--[[--------------------------< E X P O R T T A B L E >------------------------------------------------------ ]]

return { harvard_citation = harvard_citation, sfn = sfn, sfnm = sfnm, };