Модуль:Coordinates

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--[[
This module is intended to replace the functionality of {{Coord}} and related
templates.  It provides several methods, including

{{#Invoke:Coordinates | coord }} : General function formatting and displaying
coordinate values.

{{#Invoke:Coordinates | dec2dms }} : Simple function for converting decimal
degree values to DMS format.

{{#Invoke:Coordinates | dms2dec }} : Simple function for converting DMS format
to decimal degree format.

]]

math_mod = require( "Module:Math" );
globalFrame = nil

coordinates = {};

local Dispay = '';

--[[ Helper function, replacement for {{coord/display/title}} ]]
function displaytitle (s, notes, globalFrame)
	return globalFrame:extensionTag{
		name = 'indicator',
		content = s .. notes,
		args = { name = '0-coord' }
	};
end

--[[ Helper function, Replacement for {{coord/display/inline}} ]]
function displayinline (s, notes)
	return s .. notes
end

--[[ Helper function, used in detecting DMS formatting ]]
local dmsTest = function(first, second)
	local concatenated = first:upper() .. second:upper();
	
	if concatenated == "NE" or concatenated == "NW" or concatenated == "SE" or concatenated == "SW" or
		concatenated == "EN" or concatenated == "WN" or concatenated == "ES" or concatenated == "WS" then
		return true;
	end
	return false;
end

--[[
parseDec

Transforms decimal format latitude and longitude into the a
structure to be used in displaying coordinates
]]
function parseDec( lat, long, format )
	local coordinateSpec = {}
	local errors = {}
	
	if long == "" or long == nil then
		return nil, {{"parseDec", "Пропущена долгота"}}
	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, " с. ш.", " ю. ш.", mode)  -- {{coord/dec2dms|{{{1}}}|N|S|{{coord/prec dec|{{{1}}}|{{{2}}}}}}}
	coordinateSpec["dms-long"] = convert_dec2dms( long, " в. д.", " з. д.", mode)  -- {{coord/dec2dms|{{{2}}}|E|W|{{coord/prec dec|{{{1}}}|{{{2}}}}}}}
	
	if format ~= "" then
		coordinateSpec.default = format
	else
		coordinateSpec.default = "dms"
	end

	return coordinateSpec, errors
end

--[[ Helper function, handle optional args. ]]
function optionalArg(arg, suplement)
	if arg ~= nil and arg ~= "" then
		return string.format( "%02d", tonumber( arg ) ) .. suplement
	end
	return ""
end

--[[
parseDMS

Transforms degrees, minutes, seconds format latitude and longitude
into the a structure to be used in displaying coordinates
]]
function parseDMS( lat_d, lat_m, lat_s, lat_f, long_d, long_m, long_s, long_f, format )
	local coordinateSpec = {}
	local errors = {}
	
	lat_f = lat_f:upper();
	long_f = long_f:upper();
	
	-- Check if specified backward
	if lat_f == 'E' or lat_f == 'W' then
		local t_d, t_m, t_s, t_f;
		t_d = lat_d;
		t_m = lat_m;
		t_s = lat_s;
		t_f = lat_f;
		lat_d = long_d;
		lat_m = long_m;
		lat_s = long_s;
		lat_f = long_f;
		long_d = t_d;
		long_m = t_m;
		long_s = t_s;
		long_f = t_f;
	end
	
	errors = validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, 'parseDMS', true );
	if long_d == nil or long_d == "" then
		table.insert(errors, {"parseDMS", "Пропущена долгота" })
	end
	
	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 lat_m == nil and lat_s == nil and long_m == nil and long_s == nil and #errors == 0 
		or math_mod._precision( lat_d ) > 0 or math_mod._precision( long_d ) > 0 then
			if lat_f:upper() == 'S' then
				lat_d = '-' .. lat_d;
				lat_f = " ю. ш.";
			else
				lat_f = " с. ш.";
			end
			if long_f:upper() == 'W' then
				long_d = '-' .. long_d;
				long_f = " з. д.";
			else
				long_f = " в. д.";
			end
			
			return parseDec( lat_d, long_d, format );
	end

	if lat_f:upper() == 'S' then
		lat_f = " ю. ш.";
	else
		lat_f = " с. ш.";
	end

	if long_f:upper() == 'E' then
		long_f = " в. д.";
	else
		long_f = " з. д.";
	end
	
	if lat_s == '0' and long_s == '0'  then
		lat_s, long_s = nil, nil
		if lat_m == '0' and long_m == '0' then
			lat_m, long_m = nil, nil
		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

	if format ~= "" then
		coordinateSpec.default = format
	else
		coordinateSpec.default = "dms"
	end

	return coordinateSpec, errors
end

--[[
splitParam

Split the parameter string and convert it into an object.
]]
function splitParam( param )
	local out = {}
	for pair in mw.text.gsplit( param, '_', true ) do
		local keyValue = mw.text.split( pair, ':', true )
		if #keyValue == 2 then
			out[keyValue[1]] = keyValue[2]
		end
	end
	return out
end

--[[
specPrinter

Output formatter.  Takes the structure generated by either parseDec
or parseDMS and formats it for inclusion on Wikipedia.
]]
function specPrinter(args)
	local coordinateSpec, errors = formatTest(args)
	local param = coordinateSpec["param"] .. '_' .. coordinateSpec["extra_param"]
	local uriComponents = param
	if uriComponents == "" then
		-- RETURN error, should never be empty or nil
		return "Ошибка: не задан param"
	end
	if args["name"] ~= "" and args["name"] ~= nil then
		uriComponents = uriComponents .. "&title=" .. mw.uri.encode(coordinateSpec["name"])
	end
	local text = ''
	
	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) .. "°&nbsp;ю.&nbsp;ш."
	else
		geodeclat = (coordinateSpec["dec-lat"] or 0) .. "°&nbsp;с.&nbsp;ш."
	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) .. "°&nbsp;з.&nbsp;д."
	else
		geodeclong = (coordinateSpec["dec-long"] or 0) .. "°&nbsp;в.&nbsp;д."
	end
	
	local geodmshtml = '<span class="geo-dms" title="Различные карты и схемы для этого места">'
			 .. '<span class="latitude">' .. coordinateSpec["dms-lat"] .. '</span> '
			 .. '<span class="longitude">' ..coordinateSpec["dms-long"] .. '</span>'
			 .. '</span>'

	local geodechtml = '<span class="geo-dec" title="Различные карты и схемы для этого места">'
			 .. geodeclat .. ' '
			 .. geodeclong
			 .. '</span>'

	local geonumhtml = '<span class="geo">'
			 .. coordinateSpec["dec-lat"] .. '; '
			 .. coordinateSpec["dec-long"]
			 .. '</span>'

	local inner;
	inner = '<span class="geo-geo-' .. coordinateSpec.default .. '"><span class="geo-dms">' .. geodmshtml .. '</span>'
				.. '<span class="geo-multi-punct">&#xfeff; / &#xfeff;</span>'
				.. '<span class="geo-dec">';

	if coordinateSpec.default == 'dec' then
		text = geodechtml
	else
		text = geodmshtml
	end
	
	if args["name"] == "" or args["name"] == nil then
		inner = inner .. geodechtml
				.. '<span style="display:none">&#xfeff; / ' .. geonumhtml .. '</span></span></span>'
	else
		inner = inner .. '<span class="vcard">' .. geodechtml
				.. '<span style="display:none">&#xfeff; / ' .. geonumhtml .. '</span>'
				.. '<span style="display:none">&#xfeff; (<span class="fn org">'
				.. args["name"] .. '</span>)</span></span></span></span>'
	end

	local params = splitParam( param )
	local type = string.gsub( string.lower( params.type or '' ), '%(.+$', '' )

	local scale
	if args.scale and args.scale ~= '' then
		scale = tonumber( args.scale )
	end
	if not scale then
		local typeScale = {
			adm1st = 1000000,
			adm2nd = 300000,
			adm3rd = 100000,
			airport = 30000,
			city = 100000,
			country = 10000000,
			edu = 10000,
			event = 50000,
			forest = 50000,
			glacier = 50000,
			isle = 100000,
			landmark = 10000,
			mountain = 100000,
			pass = 10000,
			railwaystation = 10000,
			river = 100000,
			satellite = 10000000,
			waterbody = 100000,
			camera = 10000
		}
		if typeScale[type] then
			scale = typeScale[type]
		else
			scale = 30000
		end
	end

	if scale < 2000 then zoom = 18
	elseif scale <   5000 then zoom = 17
	elseif scale <  10000 then zoom = 16
	elseif scale <  20000 then zoom = 15
	elseif scale <  40000 then zoom = 14
	elseif scale <  80000 then zoom = 13
	elseif scale < 160000 then zoom = 12
	elseif scale < 320000 then zoom = 11
	elseif scale < 640000 then zoom = 10
	elseif scale < 1280000 then zoom = 9
	elseif scale < 2560000 then zoom = 8
	elseif scale < 5120000 then zoom = 7
	elseif scale < 10240000 then zoom = 6
	elseif scale < 20480000 then zoom = 5
	elseif scale < 40960000 then zoom = 4
	else zoom = 3
	end

	if coordinateSpec.default == 'dec' then
		text = geodeclat .. ' ' .. geodeclong
	else
		text = coordinateSpec["dms-lat"] .. ' ' .. coordinateSpec["dms-long"]
	end
	
	local maplinkArgs = {
		['latitude'] = coordinateSpec['dec-lat'],
		['longitude'] = coordinateSpec['dec-long'],
		['zoom'] = zoom,
		['text'] = text,
		['title'] = mw.title.getCurrentTitle().text,
		['lang'] = 'ru'
	}

	if coordinateSpec['name'] and coordinateSpec['name'] ~= '' then
		maplinkArgs['title'] = coordinateSpec['name']
	end

	local maplinkMarkerSymbol = 'star'
	local markerSymbols = {
		adm1st = 'city',
		adm2nd = 'city',
		adm3rd = 'city',
		airport = 'airport',
		city = 'city',
		country = 'city',
		edu = 'college',
		forest = 'park',
		glacier = 'mountain',
		mountain = 'mountain',
		pass = 'mountain',
		railwaystation = 'rail',
		river = 'water',
		satellite = 'rocket',
		waterbody = 'water',
		camera = 'attraction'
	}
	if markerSymbols[type] then
		maplinkMarkerSymbol = markerSymbols[type]
	end

	local maplinkContent = [[ {
		"type": "Feature",
		"geometry": {
			"type": "Point",
			"coordinates": [
				]] .. coordinateSpec['dec-long'] .. [[,
				]] .. coordinateSpec['dec-lat'] .. [[
			]
		},
		"properties": {
			"title": "]] .. mw.text.encode( maplinkArgs['title'] ) .. [[",
			"marker-symbol": "]] .. maplinkMarkerSymbol .. [[",
			"marker-color": "#3366cc"
		}
	} ]];
	
	local entityId = mw.wikibase.getEntityIdForCurrentPage()
	if entityId then
		maplinkContent = maplinkContent .. [[, {
			"type": "ExternalData",
			"service": "geoline",
			"ids": "]] .. mw.wikibase.getEntityIdForCurrentPage() .. [[",
			"properties": {
				"stroke": "#FF9999"
			}
		}, {
			"type": "ExternalData",
			"service": "geoshape",
			"ids": "]] .. mw.wikibase.getEntityIdForCurrentPage() .. [[",
			"properties": {
				"fill": "#FF0000",
				"fill-opacity": 0.1,
				"stroke": "#FF9999"
			}
		} ]]
	end

	local globe = string.lower( args.globe or params.globe or '' )
	if globe == '' then globe = 'earth' end

	local result = '<span class="coordinates plainlinks nourlexpansion" data-param="' .. mw.text.encode( param ) .. '">'

	-- external links
	local nogoogle = string.lower( args.nogoogle or '' )
	local noosm = string.lower( args.noosm or '' )
	local noyandex = string.lower( args.noyandex or '' )

	if globe == 'earth' then
		result = result .. '<span title="Показать карту">' .. globalFrame:extensionTag{
			name = 'maplink',
			content = '[' .. maplinkContent .. ']',
			args = maplinkArgs
		} .. '</span>'
		if nogoogle == '' or noosm == '' or noyandex == '' then
			result = result .. '<sup class="geo-services noprint">'
			
			result = result .. globalFrame:preprocess(
			'<span class="geo-geohack" title="Карты и инструменты на GeoHack">' ..
			'[//tools.wmflabs.org/geohack/geohack.php?language=ru&pagename={{FULLPAGENAMEE}}&params=' ..
			uriComponents .. ' ' .. '<span>H</span>]</span>' )
			
			if nogoogle == '' then
				result = result .. '<span class="geo-google" title="Это место на «Картах Google»">[//maps.google.com/maps?'
					.. 'll=' ..  coordinateSpec["dec-lat"] .. ',' .. coordinateSpec["dec-long"]
					.. '&q=' ..  coordinateSpec["dec-lat"] .. ',' .. coordinateSpec["dec-long"]
					.. '&spn=' .. (scale / 1000000) .. ',' .. (scale / 1000000)
					.. '&t=h&hl=ru '
					.. '<span>G</span>]</span>'
			end
			if noyandex == '' then
				result = result .. '<span class="geo-yandex" title="Это место на «Яндекс.Картах»">[//yandex.ru/maps/'
					.. '?ll=' .. coordinateSpec["dec-long"] .. ',' .. coordinateSpec["dec-lat"]
					.. '&pt=' .. coordinateSpec["dec-long"] .. ',' .. coordinateSpec["dec-lat"]
					.. '&spn=' .. (scale / 1000000) .. ',' .. (scale / 1000000)
					.. '&l=' .. 'sat,skl '
					.. '<span>Я</span>]</span>'
			end
			if noosm == '' then
				result = result .. '<span class="geo-osm" title="Это место на карте OpenStreetMap">[https://www.openstreetmap.org/?'
					.. 'mlat=' .. coordinateSpec["dec-lat"] .. '&mlon=' .. coordinateSpec["dec-long"]
					.. '&zoom=' .. zoom .. ' '
					.. '<span>O</span>]</span>'
			end
			result = result .. '</sup>'
		end
	else
		-- FIXME [[phab:T151138]]
		result = result .. globalFrame:preprocess(
			'[//tools.wmflabs.org/geohack/geohack.php?language=ru&pagename={{FULLPAGENAMEE}}&params=' ..
			uriComponents .. ' ' .. inner .. ']' )
		if globe == 'moon' or globe == 'mars' and nogoogle == '' then
			result = result .. '<sup class="geo-services noprint"><span class="geo-google" title="Это место на «Картах Google»">[//www.google.com/' .. globe
			.. '/#lat=' ..  coordinateSpec["dec-lat"] .. '&lon=' .. coordinateSpec["dec-long"]
			.. '&zoom=7'
			.. '&map=visible'
			.. '&apollo= <span>G</span>]</span></sup>'
		end
	end
	
	result = result .. '</span>'
	
	local geodata = ''
	if coordinateSpec["dec-lat"] and coordinateSpec["dec-long"] then
		
		if globe ~= 'earth' and globe ~= 'moon' then
			if tonumber(coordinateSpec["dec-long"]) < 0 then
				coordinateSpec["dec-long"] = tostring(360 + tonumber(coordinateSpec["dec-long"]))
			end
		end
		local frame = mw.getCurrentFrame()
		local geodataparams = {[1] = coordinateSpec["dec-lat"], [2] = coordinateSpec["dec-long"], [3] = coordinateSpec["extra_param"], ['globe'] = globe }
		if string.find( Display, 'title' ) ~= nil and mw.title.getCurrentTitle():inNamespace(0) then
			geodataparams[4] = 'primary'
		end
		if coordinateSpec["name"] then
			geodataparams.name = coordinateSpec["name"]
		end
		
		geodata = frame:callParserFunction('#coordinates', geodataparams )
		result = result .. geodata
	end
	
	if errors then 
		return result .. errors
	else
		return result
	end
end

--[[
Formats any error messages generated for display
]]
function errorPrinter(errors)
	local result = ""
	for i,v in ipairs(errors) do
		local errorHTML = '<strong class="error">Координаты: ' .. v[2] .. '</strong>'
		result = result .. errorHTML .. "<br />"
	end
	if result ~= '' then
		return result .. '[[Категория:Страницы с некорректными тегами координат]]'
	end
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 input arguments for coord to determine the kind of data being provided
and then make the necessary processing.
]]
function formatTest(args)
	local result, errors;
	
	local param, extra_param = {}, {}

	if args[1] == "" then
		-- no lat logic
		return errorPrinter( {{"formatTest", "Пропущена широта"}} )
	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
		param = { 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'] )
		param = { args[1], args[2], args[3], args[4], args[5],
			args[6], args[7], args[8], args[9] };
		if args[10] ~= '' then
			table.insert( errors, { 'formatTest', 'Неожиданные дополнительные параметры' } );
		end
	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'] )
		param = { args[1], args[2], args[3], args[4], args[5], args[6], args[7] };
		if args[8] ~= '' then
			table.insert( errors, { 'formatTest', 'Неожиданные дополнительные параметры' } );
		end
	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'] )
		param = { args[1], args[2], args[3], args[4], args[5] };
		if args[6] ~= '' then
			table.insert( errors, { 'formatTest', 'Неожиданные дополнительные параметры' } );
		end
	else
		-- Error
		return errorPrinter( {{"formatTest", "Неизвестный формат аргумента"}} )
	end
	result.name     = args["name"]

	local last = table.getn (param)
	if param[last] == '' then
		table.remove(param, last)
	end

	local extra_params = { 'dim', 'globe', 'scale', 'region', 'source', 'type' }
	for _, v in ipairs( extra_params ) do
		if (args[v] or '') ~= '' then
			table.insert( extra_param, v .. ':' .. args[v] );
		end
	end

	result.param = table.concat( param , '_' );
	result.extra_param = table.concat( extra_param , '_' );

	return result, errorPrinter( errors )
end

--[[
Helper function, convert decimal latitude or longitude to
degrees, minutes, and seconds format based on the specified precision.
]]
function convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision)
	local coord = tonumber(coordinate) or 0
	local postfix
	if coord >= 0 then
		postfix = firstPostfix
	else
		postfix = secondPostfix
	end

	precision = precision:lower();
	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
end

--[[ Helper function, convert decimal to degrees ]]
function convert_dec2dms_d(coordinate)
	local d = math_mod._round( coordinate, 0 ) .. "°"
	return d .. ""
end

--[[ Helper function, convert decimal to degrees and minutes ]]
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

--[[ Helper function, convert decimal to degrees, minutes, and seconds ]]
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 DMS format into a N or E decimal coordinate
]]
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
	
	local factor
	direction = mw.ustring.gsub(direction, '^[ ]*(.-)[ ]*$', '%1');
	if direction == "S" or direction == "W" then
		factor = -1
	else
		factor = 1
	end
	
	local precision = 0
	if seconds_str ~= nil and seconds_str ~= '' then
		precision = 5 + math.max( math_mod._precision(seconds_str), 0 );
	elseif minutes_str ~= nil and minutes_str ~= '' then
		precision = 3 + math.max( math_mod._precision(minutes_str), 0 );
	else
		precision = math.max( math_mod._precision(degrees_str), 0 );
	end
	
	local decimal = factor * (degrees+(minutes+seconds/60)/60)
	return string.format( "%." .. precision .. "f", decimal ) -- not tonumber since this whole thing is string based.
end

--[[
Checks input values to for out of range errors.
]]
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, "градусы широты  < 0"})
		end
		if long_d < 0 then
			table.insert(errors, {source, "градусы долготы < 0"})
		end
		--[[
		#coordinates is inconsistent about whether this is an error.  If globe: is
		specified, it won't error on this condition, but otherwise it will.
		
		For not simply disable this check.
		
		if long_d > 180 then
			table.insert(errors, {source, "longitude degrees > 180 with hemisphere flag"})
		end
		]]
	end
		
	if lat_d > 90 then
		table.insert(errors, {source, "градусы широты > 90"})
	end
	if lat_d < -90 then
		table.insert(errors, {source, "градусы широты < -90"})
	end
	if lat_m >= 60 then
		table.insert(errors, {source, "минуты широты >= 60"})
	end
	if lat_m < 0 then
		table.insert(errors, {source, "минуты широты < 0"})
	end
	if lat_s >= 60 then
		table.insert(errors, {source, "секунды широты >= 60"})
	end
	if lat_s < 0 then
		table.insert(errors, {source, "секунды широты < 0"})
	end
	if long_d >= 360 then
		table.insert(errors, {source, "градусы долготы >= 360"})
	end
	if long_d <= -360 then
		table.insert(errors, {source, "градусы долготы <= -360"})
	end
	if long_m >= 60 then
		table.insert(errors, {source, "минуты долготы >= 60"})
	end
	if long_m < 0 then
		table.insert(errors, {source, "минуты долготы < 0"})
	end
	if long_s >= 60 then
		table.insert(errors, {source, "секунды долготы >= 60"})
	end
	if long_s < 0 then
		table.insert(errors, {source, "секунды долготы < 0"})
	end
	
	return errors;
end

local function splitCoord(args, s)
	if s and s~= nil then
		local iterator = mw.ustring.gmatch(s, "[^/]+");
		local i = 1;
		for w in iterator do
			args[i] = w;
			i = i + 1;
		end	
	end
	
	for i=1,10 do
		if args[i] == nil then
			args[i] = ""
		else
			args[i] = args[i]:match( '^%s*(.-)%s*$' );  --remove whitespace
		end
	end
	
	return args
end

--[[
dec2dms

Wrapper to allow templates to call dec2dms directly.

Usage:
	{{ Invoke:Coordinates | dec2dms | decimal_coordinate | positive_suffix |
		negative_suffix | precision }}
	
decimal_coordinate is converted to DMS format.  If positive, the positive_suffix
is appended (typical N or E), if negative, the negative suffix is appended.  The
specified precision is one of 'D', 'DM', or 'DMS' to specify the level of detail
to use.
]]
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

--[[
Helper function to determine whether to use D, DM, or DMS
format depending on the precision of the decimal input.
]]
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

--[[
dms2dec

Wrapper to allow templates to call dms2dec directly.

Usage:
	{{ Invoke:Coordinates | dms2dec | direction_flag | degrees |
		minutes | seconds }}
	
Converts DMS values specified as degrees, minutes, seconds too decimal format.
direction_flag is one of N, S, E, W, and determines whether the output is
positive (i.e. N and E) or negative (i.e. S and W).
]]
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

--[[
coord

Main entry point for Lua function to replace {{coord}}

Usage:
	{{ Invoke:Coordinates | coord }}
	{{ Invoke:Coordinates | coord | lat | long }}
	{{ Invoke:Coordinates | coord | lat | lat_flag | long | long_flag }}
	...
	
	Refer to {{coord}} documentation page for many additional parameters and
	configuration options.
	
Note: This function provides the visual display elements of {{coord}}.  In
order to load coordinates into the database, the {{#coordinates:}} parser
function must also be called, this is done automatically in the Lua
version of {{coord}}.
]]
function coordinates.coord(frame)
	globalFrame = frame
	local args = frame.args
	if args[1] == nil then
		local pFrame = frame:getParent();
		args = pFrame.args;
		for k,v in pairs( frame.args ) do
			args[k] = v;
		end
	end
	
	local coord = args.coord or nil;
	args = splitCoord(args, coord)
	args['format'] = args['format'] or '';
	
	Display = string.lower(args.display or "inline")
	local contents = specPrinter(args)
	local Notes = args.notes or ""
	if Display == '' then
		Display = 'inline';
	end
	
	local text = ''
	if string.find( Display, 'inline' ) ~= nil then
		text = displayinline(contents, Notes)
	end
	if string.find( Display, 'title' ) ~= nil then
		displaytitle_ = true
		text = text .. displaytitle(contents, Notes, frame)
	end
	return text
end

function coordinates.getLon(frame)
	local args = frame.args
	
	args = splitCoord(args, args[1])
	
	local out = formatTest(args)
	return out['dec-long']
end

function coordinates.getLat(frame)
	local args = frame.args
	
	args = splitCoord(args, args[1])
	
	local out = formatTest(args)
	return out['dec-lat']
end

return coordinates