Module:Coordinates
Documentation for this module may be created at Module:Coordinates/doc
-- A module that mimics the functionality of Template:Coord and its sub templates -- The attempt is to actually mimic a conversion of an often used en.wp template in the way -- that most templates will actually be converted by the wiki users. -- Attempt is not really to write a nice and proper module from scratch :D local math_mod = require "Module:Math"; globalFrame = nil coordinates = {}; --- Replacement for {{coord/display/title}} function displaytitle (s) local l = "[[Geographic coordinate system|Coordinates]]: " .. s local co = '<span id="coordinates">' .. l .. '</span>'; return '<span style="font-size: small;">' .. co .. '</span>'; end --- Replacement for {{coord/display/inline}} function displayinline (s) return s end --- Test if the arguments imply that DMS might be in use local dmsTest = function(first, second) local concatenated = first .. second; if concatenated == "NE" or concatenated == "NW" or concatenated == "SE" or concatenated == "SW" then return true; end return false; end --- Parse the frame assuming that it is in dec format. -- @frame -- @returns a table with all information needed to display coordinates function parseDec( lat, long, format ) local coordinateSpec = {} local errors = {} if long == "" or long == nil then return nil, {{"parseDec", "Missing longitude"}} end errors = validate( lat, nil, nil, long, nil, nil, 'parseDec', false ); coordinateSpec["dec-lat"] = lat; coordinateSpec["dec-long"] = long; local mode = coordinates.determineMode( lat, long ); coordinateSpec["dms-lat"] = convert_dec2dms( lat, "N", "S", mode) -- {{coord/dec2dms|{{{1}}}|N|S|{{coord/prec dec|{{{1}}}|{{{2}}}}}}} coordinateSpec["dms-long"] = convert_dec2dms( long, "E", "W", mode) -- {{coord/dec2dms|{{{2}}}|E|W|{{coord/prec dec|{{{1}}}|{{{2}}}}}}} if format ~= "" then coordinateSpec.default = format else coordinateSpec.default = "dec" end return coordinateSpec, errors end function optionalArg(arg, suplement) if arg ~= nil and arg ~= "" then return arg .. suplement end return "" end function isEmpty(arg) if arg == nil or arg == "" then return true end return false end function parseDMS( lat_d, lat_m, lat_s, lat_f, long_d, long_m, long_s, long_f, format ) local coordinateSpec = {} local errors = {} errors = validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, 'parseDMS', true ); if isEmpty(long_d) then table.insert(errors, {"parseDMS", "Missing longitude" }) end if tonumber(lat_d) < 0 then table.insert( errors, { 'parseDMS', 'Invalid latitude' } ); end if lat_m == nil and lat_s == nil and long_m == nil and long_s == nil and #errors == 0 then if math_mod._precision( lat_d ) > 0 or math_mod._precision( long_d ) > 0 then if lat_f:upper() == 'S' then lat_d = '-' .. lat_d; end if long_f:upper() == 'W' then long_d = '-' .. long_d; end return parseDec( lat_d, long_d, format ); end end coordinateSpec["dms-lat"] = lat_d.."°"..optionalArg(lat_m,"′") .. optionalArg(lat_s,"″") .. lat_f coordinateSpec["dms-long"] = long_d.."°"..optionalArg(long_m,"′") .. optionalArg(long_s,"″") .. long_f coordinateSpec["dec-lat"] = convert_dms2dec(lat_f, lat_d, lat_m, lat_s) -- {{coord/dms2dec|{{{4}}}|{{{1}}}|0{{{2}}}|0{{{3}}}}} coordinateSpec["dec-long"] = convert_dms2dec(long_f, long_d, long_m, long_s) -- {{coord/dms2dec|{{{8}}}|{{{5}}}|0{{{6}}}|0{{{7}}}}} if format ~= "" then coordinateSpec.default = format else coordinateSpec.default = "dms" end return coordinateSpec, errors end --- A function that prints a table of coordinate specifications to HTML function specPrinter(args, coordinateSpec) local uriComponents = coordinateSpec["param"] if uriComponents == "" then -- RETURN error, should never be empty or nil return "ERROR param was empty" end if args["name"] ~= "" and args["name"] ~= nil then uriComponents = uriComponents .. "&title=" .. mw.uri.encode(coordinateSpec["name"]) end local geodmshtml = '<span class="geo-dms" title="Maps, aerial photos, and other data for this location">' .. '<span class="latitude">' .. coordinateSpec["dms-lat"] .. '</span> ' .. '<span class="longitude">' ..coordinateSpec["dms-long"] .. '</span>' .. '</span>' local lat = tonumber( coordinateSpec["dec-lat"] ) or 0 if lat < 0 then -- FIXME this breaks the pre-existing precision geodeclat = coordinateSpec["dec-lat"]:sub(2) .. "°S" else geodeclat = (coordinateSpec["dec-lat"] or 0) .. "°N" end local long = tonumber( coordinateSpec["dec-long"] ) or 0 if long < 0 then -- FIXME does not handle unicode minus geodeclong = coordinateSpec["dec-long"]:sub(2) .. "°W" else geodeclong = (coordinateSpec["dec-long"] or 0) .. "°E" end -- TODO requires DEC formatting local geodechtml = '<span class="geo-dec" title="Maps, aerial photos, and other data for this location">' .. geodeclat .. ' ' .. geodeclong .. '</span>' local geonumhtml = '<span class="geo">' .. coordinateSpec["dec-lat"] .. '; ' .. coordinateSpec["dec-long"] .. '</span>' local inner if args["name"] == "" or args["name"] == nil then inner = '<span class="' .. displayDefault(coordinateSpec["default"], "dms" ) .. '">' .. geodmshtml .. '</span>' .. '<span class="geo-multi-punct"> / </span>' .. '<span class="' .. displayDefault(coordinateSpec["default"], "dec" ) .. '">' .. geodechtml .. '<span style="display:none"> / ' .. geonumhtml .. '</span></span>' else inner = '<span class="' .. displayDefault(coordinateSpec["default"], "dms" ) .. '">' .. geodmshtml .. '</span>' .. '<span class="geo-multi-punct"> / </span>' .. '<span class="' .. displayDefault(coordinateSpec["default"], "dec" ) .. '"><span class="vcard">' .. geodechtml .. '<span style="display:none"> / ' .. geonumhtml .. '</span>' .. '<span style="display:none"> (<span class="fn org">' .. args["name"] .. '</span>)</span></span></span>' end return '<span class="plainlinks nourlexpansion">' .. globalFrame:preprocess( '[http://toolserver.org/~geohack/geohack.php?pagename={{FULLPAGENAMEE}}¶ms=' .. uriComponents .. ' ' .. inner .. ']') .. '</span>' end function errorPrinter(errors) local result = "" for i,v in ipairs(errors) do local errorHTML = '<strong class="error">' .. v[2] .. ' in Module:Coordinates.' .. v[1] .."()" .. '</strong>' result = result .. errorHTML .. "<br />" end return result end --- Determine the required CSS class to display coordinates -- Usually geo-nondefault is hidden by CSS, unless a user has overridden this for himself -- default is the mode as specificied by the user when calling the {{coord}} template -- mode is the display mode (dec or dms) that we will need to determine the css class for function displayDefault(default, mode) if default == "" then default = "dec" end if default == mode then return "geo-default" else return "geo-nondefault" end end --- Check the arguments to determine what type of coordinates has been input function formatTest(args) local result, errors; if args[1] == "" then -- no lat logic return errorPrinter( {{"formatTest", "Missing latitude"}} ) elseif args[4] == "" and args[5] == "" and args[6] == "" then -- dec logic result, errors = parseDec( args[1], args[2], args['format'] ) if result == nil then return errorPrinter( errors ); end result.param = table.concat( {args[1], "_N_", args[2], "_E_", args[3] } ); elseif dmsTest(args[4], args[8]) then -- dms logic result, errors = parseDMS( args[1], args[2], args[3], args[4], args[5], args[6], args[7], args[8], args['format'] ) result.param = table.concat( { args[1], args[2], args[3], args[4], args[5], args[6], args[7], args[8], args[9] } , '_' ); elseif dmsTest(args[3], args[6]) then -- dm logic result, errors = parseDMS( args[1], args[2], nil, args[3], args[4], args[5], nil, args[6], args['format'] ) result.param = table.concat( { args[1], args[2], args[3], args[4], args[5], args[6], args[7] } , '_' ); elseif dmsTest(args[2], args[4]) then -- d logic result, errors = parseDMS( args[1], nil, nil, args[2], args[3], nil, nil, args[4], args['format'] ) result.param = table.concat( { args[1], args[2], args[3], args[4], args[5] } , '_' ); else -- Error return errorPrinter( {{"formatTest", "Unknown argument format"}} ) end result.name = args["name"] if #errors == 0 then return specPrinter( args, result ) else return specPrinter( args, result ) .. " " .. errorPrinter(errors) end end function convert_dec2dms_d(coordinate) local d = math_mod._round( coordinate, 0 ) .. "°" return d .. "" end function convert_dec2dms_dm(coordinate) coordinate = math_mod._round( coordinate * 60, 0 ); local m = coordinate % 60; coordinate = math.floor( (coordinate - m) / 60 ); local d = coordinate % 360 .."°" return d .. string.format( "%02d′", m ) end function convert_dec2dms_dms(coordinate) coordinate = math_mod._round( coordinate * 60 * 60, 0 ); local s = coordinate % 60 coordinate = math.floor( (coordinate - s) / 60 ); local m = coordinate % 60 coordinate = math.floor( (coordinate - m) / 60 ); local d = coordinate % 360 .."°" return d .. string.format( "%02d′", m ) .. string.format( "%02d″", s ) end --- Convert a latitude or longitude to the DMS format function convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision) -- {{Coord/dec2dms/{{{4}}}|{{#ifexpr:{{{1}}} >= 0||-}}{{{1}}}}}{{#ifexpr:{{{1}}} >= 0|{{{2}}}|{{{3}}}}} local coord = tonumber(coordinate) or 0 local postfix if coord >= 0 then postfix = firstPostfix else postfix = secondPostfix end if precision == "dms" then return convert_dec2dms_dms( math.abs( coord ) ) .. postfix; elseif precision == "dm" then return convert_dec2dms_dm( math.abs( coord ) ) .. postfix; elseif precision == "d" then return convert_dec2dms_d( math.abs( coord ) ) .. postfix; end -- return "" .. globalFrame:expandTemplate{ title = 'coord/dec2dms', args = {coordinate, firstPostfix, secondPostfix, precision}} end --- Convert DMS into a N or E decimal coordinate -- @param coordinate direction. either "N" "S" "E" or "W" -- @param degrees: string or number -- @param minutes: string or number -- @param seconds: string or number -- @return a number with the N or E normalized decimal coordinate of the input function convert_dms2dec(direction, degrees_str, minutes_str, seconds_str) local degrees = tonumber(degrees_str) or 0 local minutes = tonumber(minutes_str) or 0 local seconds = tonumber(seconds_str) or 0 -- {{#expr:{{#switch:{{{1}}}|N|E=1|S|W=-1}}*({{{2|0}}}+({{{3|0}}}+{{{4|0}}}/60)/60) round {{{precdec|{{#if:{{{4|}}}|5|{{#if:{{{3|}}}|3|0}}}}+{{precision1|{{{4|{{{3|{{{2}}}}}}}}}}}}}}}} local factor if direction == "N" or direction == "E" then factor = 1 else factor = -1 end local precision = 0 if not isEmpty(seconds_str) then precision = 5 + math.max( math_mod._precision(seconds_str), 0 ); elseif not isEmpty(minutes_str) then precision = 3 + math.max( math_mod._precision(minutes_str), 0 ); else precision = math.max( math_mod._precision(degrees_str), 0 ); end -- nil -> 0 local decimal = factor * (degrees+(minutes+seconds/60)/60) return string.format( "%." .. precision .. "f", decimal ) -- not tonumber since this whole thing is string based. --return "" .. globalFrame:expandTemplate{ title = 'coord/dms2dec', args = {direction, degrees, minutes, seconds}} end function validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, source, strong ) local errors = {}; lat_d = tonumber( lat_d ) or 0; lat_m = tonumber( lat_m ) or 0; lat_s = tonumber( lat_s ) or 0; long_d = tonumber( long_d ) or 0; long_m = tonumber( long_m ) or 0; long_s = tonumber( long_s ) or 0; if strong then if lat_d < 0 then table.insert(errors, {source, "latitude degrees < 0 with hemisphere flag"}) end if long_d < 0 then table.insert(errors, {source, "longitude degrees < 0 with hemisphere flag"}) end end if lat_d > 90 then table.insert(errors, {source, "latitude degrees > 90"}) end if lat_d < -90 then table.insert(errors, {source, "latitude degrees < -90"}) end if lat_m >= 60 then table.insert(errors, {source, "latitude minutes >= 60"}) end if lat_m < 0 then table.insert(errors, {source, "latitude minutes < 0"}) end if lat_s >= 60 then table.insert(errors, {source, "latitude seconds >= 60"}) end if lat_s < 0 then table.insert(errors, {source, "latitude seconds < 0"}) end if long_d >= 360 then table.insert(errors, {source, "longitude degrees >= 360"}) end if long_d <= -360 then table.insert(errors, {source, "longitude degrees <= -360"}) end if long_m >= 60 then table.insert(errors, {source, "longitude minutes >= 60"}) end if long_m < 0 then table.insert(errors, {source, "longitude minutes < 0"}) end if long_s >= 60 then table.insert(errors, {source, "longitude seconds >= 60"}) end if long_s < 0 then table.insert(errors, {source, "longitude seconds < 0"}) end return errors; end --- The display function we exposed to Module:Coordinates function coordinates.input(frame) globalFrame = frame; return formatTest(frame.args) end --- The dec2dms function exposed to Module:Coordinates function coordinates.dec2dms(frame) globalFrame = frame local coordinate = frame.args[1] local firstPostfix = frame.args[2] local secondPostfix = frame.args[3] local precision = frame.args[4] return convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision) end function coordinates.determineMode( value1, value2 ) local precision = math.max( math_mod._precision( value1 ), math_mod._precision( value2 ) ); if precision <= 0 then return 'd' elseif precision <= 2 then return 'dm'; else return 'dms'; end end --- The dec2dms function exposed to Module:Coordinates function coordinates.dms2dec(frame) globalFrame = frame local direction = frame.args[1] local degrees = frame.args[2] local minutes = frame.args[3] local seconds = frame.args[4] return convert_dms2dec(direction, degrees, minutes, seconds) end --- This is used by {{coord}}. function coordinates.coord(frame) globalFrame = frame local args = frame.args for i=1,10 do if args[i] == nil then args[i] = "" else args[i] = args[i]:match( '^%s*(.-)%s*$' ); --remove whitespace end end args['format'] = args['format'] or ''; local contents = formatTest(args) local Notes = args.notes or "" local Display = string.lower(args.display or "inline") local text = '' if string.find( Display, 'inline' ) ~= nil then text = text .. displayinline(contents) end if string.find( Display, 'title' ) ~= nil then text = text .. displaytitle(contents) end return text .. Notes end return coordinates