Modul:Footnotes

}}

---

f = {
	args_default = {
		bracket_left = "",
		bracket_right = "",
		bracket_year_left = "",
		bracket_year_right = "",
		postscript = "",
		page = "",
		pages = "",
		location = "",
		page_sep = ", s. ",
		pages_sep = ", s. ",
		ref = "",
		P1 = "",
		P2 = "",
		P3 = "",
		P4 = "",
		P5 = ""
	}
};
 
function trim( str )
	if str == nil then
		return nil;
	end
	return str:match( "^%s*(.-)%s*$");
end    
 
function core( args )
	local result;
 
	if args.P5 ~= "" then
		result = args.P1 .. ' et al. ' .. args.bracket_year_left .. args.P5 .. 
		args.bracket_year_right;
	elseif args.P4 ~= "" then
		result = args.P1 .. ', ' .. args.P2 .. ' & ' .. args.P3 .. ' ' .. 
		args.bracket_year_left .. args.P4 .. args.bracket_year_right;
	elseif args.P3 ~= "" then
		result = args.P1 .. ' & ' .. args.P2 .. ' ' .. args.bracket_year_left .. 
		args.P3 .. args.bracket_year_right;
	else
		result = trim( args.P1 .. ' ' .. args.bracket_year_left .. args.P2 .. 
		args.bracket_year_right )
	end
 
	if args.ref ~= 'none' then
		if args.ref ~= "" then
			result = "[[#" .. mw.uri.anchorEncode(args.ref) .. "|" .. result .. "]]";
		else
			result = "[[#CITEREF" .. mw.uri.anchorEncode(args.P1 .. args.P2 .. args.P3 .. args.P4 .. args.P5) .. "|" .. result .. "]]";
		end
	end
 
	if args.page ~= "" then
		result = result .. args.page_sep .. args.page;
	elseif args.pages ~= "" then
		result = result .. args.pages_sep .. args.pages;
	end      
 
	if args.location ~= "" then
		result = result .. ", " .. args.location;
	end
 
	result = args.bracket_left .. result .. args.bracket_right .. args.postscript;
	return result;
end
 
function f.harvard_core( frame )
	local args = {};
	local pframe = frame:getParent();
 
	args.bracket_left = pframe.args.BracketLeft or "";
	args.bracket_right = pframe.args.BracketRight or "";
	args.bracket_year_left = pframe.args.BracketYearLeft or "";
	args.bracket_year_right = pframe.args.BracketYearRight or "";
	args.postscript = pframe.args.Postscript or "";
	if 'none' == args.postscript then
		args.postscript = '';
	end
 
	args.page = pframe.args.Page or "";
	args.pages = pframe.args.Pages or "";
	args.location = pframe.args.Location or "";
	args.page_sep = pframe.args.PageSep or "";
	args.pages_sep = pframe.args.PagesSep or "";
	args.ref = pframe.args.REF or "{{{REF}}}";
	args.P1 = trim( pframe.args.P1 ) or "";
	args.P2 = trim( pframe.args.P2 ) or "";
	args.P3 = trim( pframe.args.P3 ) or "";
	args.P4 = trim( pframe.args.P4 ) or "";
	args.P5 = trim( pframe.args.P5 ) or "";
 
	return core( args );
end
 
function f.harvard_citation( frame )
	local args = f.args_default;
	pframe = frame:getParent();
 
	args.bracket_left = "(";
	args.bracket_right = ")";
	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 "";
	args.P1 = trim( pframe.args[1] ) or "";
	args.P2 = trim( pframe.args[2] ) or "";
	args.P3 = trim( pframe.args[3] ) or "";
	args.P4 = trim( pframe.args[4] ) or "";
	args.P5 = trim( pframe.args[5] ) or "";
 
	return core( args );
end
 
function f.harvard_citation_no_bracket( frame )
	local args = f.args_default;
	pframe = frame:getParent();
 
	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 "";
	args.P1 = trim( pframe.args[1] ) or "";
	args.P2 = trim( pframe.args[2] ) or "";
	args.P3 = trim( pframe.args[3] ) or "";
	args.P4 = trim( pframe.args[4] ) or "";
	args.P5 = trim( pframe.args[5] ) or "";
 
	return core( args );
end
 
function f.sfn( frame )
	local args = f.args_default;
	for k, v in pairs( frame.args ) do											-- for {{sfnp}}, override default with values provided in the #invoke:
		args[k] = v;	   
	end
 
	pframe = frame:getParent();
 
	args.postscript = pframe.args.postscript or pframe.args.ps or ".";
	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 "";
	args.P1 = trim( pframe.args[1] ) or "";
	args.P2 = trim( pframe.args[2] ) or "";
	args.P3 = trim( pframe.args[3] ) or "";
	args.P4 = trim( pframe.args[4] ) or "";
	args.P5 = trim( pframe.args[5] ) or "";
 
	local result = core( args );
	local name = "FOOTNOTE" .. args.P1 .. args.P2 .. 
	args.P3 .. args.P4 .. args.P5 .. args.page .. args.pages .. args.location;
 
	result = frame:extensionTag{ name = "ref", args = {name=name}, content=result };
 
	return result;
end

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

common entry point for {{sfnm}} and {{sfnmp}}

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.pages = ('' ~= args.pages) and hyphen_to_dash (args.pages) or '';
		args.location = pframe.args[table.concat ({n, 'loc'})] or '';
		args.ignore = ('yes' == pframe.args[table.concat ({n, 'ignore-false-positive'})]) or ('yes' == pframe.args[table.concat ({n, 'ignore-err'})]);

		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
 
return f;