-- -- This module checks whether any of a given set of input criteria are valid CSD criteria. -- It is also possible to specify pre-defined or custom sets of CSD criteria to check against. --  local p = {}  function critMatch(s,test_values) -- returns true if s matches one of the table of test_values     if type(test_values) == "table" then         for n,value in ipairs(test_values) do            if s == value then                return true            end         end     else         error("the second parameter passed to critMatch() must be a table",2)     end end  function p.check(frame) -- the main CSD check function      -- get arguments     local args;     if frame == mw.getCurrentFrame() then         -- We're being called via #invoke. If the invoking template passed any args, use         -- them. Otherwise, use the args that were passed into the template.         args = frame:getParent().args;         for k, v in pairs(frame.args) do             args = frame.args;             break         end     else         -- We're being called from another module or from the debug console, so assume         -- the args are passed in directly.         args = frame;     end      -- define variables     local input_values = {};     local test_criteria = {};     local all_criteria = { -- all valid CSD criteria         "G1" , "G2" , "G3" , "G4" , "G5" , "G6" , "G7" , "G8" , "G9" , "G10" , "G11" , "G12" , "G13" , "G14" ,         "A1" , "A2" , "A3" , "A5" , "A7" , "A9" , "A10" , "A11",         "F1" , "F2" , "F3" , "F4" , "F5" , "F6" , "F7" , "F8" , "F9" , "F10" , "F11" ,         "C1" , "C2" ,         "U1" , "U2" , "U5" ,         "R2" , "R3" , "R4" ,         "P1" , "P2"     };     local tag_criteria = { -- all CSD criteria used by Template:Db-multiple         "G1" , "G2" , "G3" , "G4" , "G5" , "G6" , "G7" , "G8" , "G10" , "G11" , "G12" , "G13" , "G14" ,         "A1" , "A2" , "A3" , "A5" , "A7" , "A9" , "A10" , "A11",         "F1" , "F2" , "F3" , "F7" , "F8" , "F9" , "F10" ,         "C1" ,         "U1" , "U2" , "U5" ,         "R2" , "R3" , "R4" ,         "P1" , "P2"     };     local notice_criteria = { -- all CSD criteria used by Template:Db-notice-multiple         "G1" , "G2" , "G3" , "G4" , "G10" , "G11" , "G12" , "G13" , "G14" ,         "A1" , "A2" , "A3" , "A5" , "A7" , "A9" , "A10" , "A11",         "F1" , "F2" , "F3" , "F7" , "F9" , "F10" ,         "C1" ,         "U5" ,         "R2" , "R3" , "R4" ,         "P1" , "P2"     };      -- build tables of input values and test criteria     for k,v in pairs(args) do         v = mw.ustring.upper(v);          -- insert positional parameter values into input_values         if type(k) == "number" then             v = mw.ustring.gsub(v,"^%s*(.-)%s*$","%1"); -- strip whitespace from positional parameters             table.insert(input_values,v)          -- insert critn parameter values into test_criteria         elseif mw.ustring.match(k,"^crit[1-9]%d*$") then             if critMatch(v,all_criteria) then -- check to make sure the criteria are valid                 table.insert(test_criteria,v)             end         end     end      -- work out which set of CSD criteria to check against     local criteria_set = {}     if next(test_criteria) then -- if any test criteria are specified, use those regardless of the "set" parameter         criteria_set = test_criteria;     elseif args["set"] == "tag" then         criteria_set = tag_criteria;     elseif args["set"] == "notice" then         criteria_set = notice_criteria;     else         criteria_set = all_criteria;     end      -- check the input values against the criteria set and output "yes" if there is a match     for i,v in ipairs(input_values) do         if critMatch(v,criteria_set) then             return "yes"         end     end end  return p