Modul:Karta
Dokumentationen för denna modul kan skapas på Modul:Karta/dok
local getArgs = require('Module:Arguments').getArgs
local p = {}
function dbg(v, msg)
mw.log((msg or '') .. mw.text.jsonEncode(v))
end
-- Parse all unnamed string parameters in a form of "latitude, longitude" into the real number pairs
function getSequence(args)
local coords = {}
for ind, val in pairs( args ) do
if type(ind) == "number" then
local valid = false
local val2 = mw.text.split( val, ',', true )
-- allow for elevation
if #val2 >= 2 and #val2 <= 3 then
local lat = tonumber(val2[1])
local lon = tonumber(val2[2])
if lat ~= nil and lon ~= nil then
table.insert(coords, { lon, lat } )
valid = true
end
end
if not valid then error('Unnamed parameter #' .. ind .. ' "' .. val .. '" is not recognized as a valid "latitude,longitude" value') end
end
end
return coords
end
-- See http://geojson.org/geojson-spec.html
-- Convert a comma and semicolon separated numbers into geojson coordinate arrays
-- Each geotype expects a certain array depth:
-- Point - [ lon, lat ] All other types use point as the basic type
-- MultiPoint - array of points: [ point, ... ]
-- LineString - array of 2 or more points: [ point, point, ... ]
-- MultiLineString - array of LineStrings: [ [ point, point, ... ], ... ]
-- Polygon - [ [ point, point, point, point, ... ], ... ]
-- each LinearRing is an array of 4 or more points, where first and last must be the same
-- first LinearRing is the exterior ring, subsequent rings are holes in it
-- MultiPolygon - array of Polygons: [ [ [ point, point, point, point, ... ], ... ], ... ]
--
-- For example, for the LineString, data "p1;p2;p3" would be converted to [p1,p2,p3] (each "p" is a [lon,lat] value)
-- LineString has the depth of "1" -- array of points (each point being a two value array)
-- For Polygon, the same sequence "p1;p2;p3" would be converted to [[p1,p2,p3]]
-- Which is an array of array of points. But sometimes we need to specify two subarrays of points:
-- [[p1,p2],[p3]] (last point is in a separate array), and we do it with "p1;p2;;p3"
-- Similarly, for MultiPolygon, "p1;p2;;;p3" would generate [[[p1,p2]],[[p3]]]
--
function p.parseGeoSequence(args)
local result = p._parseGeoSequence(args)
if type(result) == 'string' then error(result) end
return result
end
function p._parseGeoSequence(args)
local allTypes = {
-- how many nested array levels until we get to the Point,
-- second is the minimum number of values each Points array must have
Point = { 1, 1 },
MultiPoint = { 1, 0 },
LineString = { 1, 2 },
MultiLineString = { 2, 2 },
Polygon = { 2, 4 },
MultiPolygon = { 3, 4 },
}
if not allTypes[args.geotype] then return ('Unknown geotype ' .. args.geotype) end
local levels, min = unpack(allTypes[args.geotype])
local result
result = {}
for i = 1, levels do result[i] = {} end
local gap = 0
-- Example for levels==3, converting "p1 ; p2 ; ; ; p3 ; ; p4" => [[[p1, p2]], [[p3],[p4]]]
-- This function will be called after each gap, and all values are done, so the above will call:
-- before p3: gap=2, [],[],[p1,p2] => [[[p1,p2]]],[],[]
-- before p4: gap=1, [[[p1,p2]]],[],[p3] => [[[p1,p2]]],[[p3]]],[]
-- the end, gap=2, [[[p1,p2]]],[[p3]]],[p4] => [[[p1,p2]],[[p3],[p4]]],[],[]
-- Here, convert at "p1 ; ; " from [[],[p1]]
local closeArrays = function (gap)
if #result[levels] < min then
error('Each points array must be at least ' .. min .. ' values')
elseif min == 1 and #result[levels] ~= 1 then
-- Point
error('Point must have exactly one data point')
end
-- attach arrays in reverse order to the higher order ones
for i = levels, levels-gap+1, -1 do
table.insert(result[i-1], result[i])
result[i] = {}
end
return 0
end
local usedSequence = false
for val in mw.text.gsplit(args.data, ';', true) do
local val2 = mw.text.split(val, ',', true)
-- allow for elevation
if #val2 >= 2 and #val2 <= 3 and not usedSequence then
if gap > 0 then gap = closeArrays(gap) end
local lat = tonumber(val2[1])
local lon = tonumber(val2[2])
if lat == nil or lon == nil then return ('Bad data value "' .. val .. '"') end
table.insert(result[levels], { lon, lat } )
else
val = mw.text.trim(val)
if val == '' then
usedSequence = false
gap = gap + 1
if (gap >= levels) then return ('Data must not skip more than ' .. levels-1 .. ' values') end
elseif usedSequence then
return ('Coordinates may not be added right after the named sequence')
else
if gap > 0 then
gap = closeArrays(gap)
elseif #result[levels] > 0 then
return ('Named sequence "' .. val .. '" cannot be used in the middle of the sequence')
end
-- Parse value as a sequence name. Eventually we can load data from external data sources
if val == 'values' then
val = getSequence(args)
elseif min == 4 and val == 'world' then
val = {{36000,-180}, {36000,180}, {-36000,180}, {-36000,-180}, {36000,-180}}
elseif tonumber(val) ~= nil then
return ('Not a valid coordinate or a sequence name: ' .. val)
else
return ('Sequence "' .. val .. '" is not known. Try "values" or "world" (for Polygons), or specify values as lat,lon;lat,lon;... pairs')
end
result[levels] = val
usedSequence = true
end
end
end
-- allow one empty last value (some might close the list with an extra semicolon)
if (gap > 1) then return ('Data values must not have blanks at the end') end
closeArrays(levels-1)
return args.geotype == 'Point' and result[1][1] or result[1]
end
-- Run this function to check that the above works ok
function p.parseGeoSequenceTest()
local testSeq = function(data, expected)
local result = getSequence(data)
if type(result) == 'table' then
local actual = mw.text.jsonEncode(result)
result = actual ~= expected and 'data="' .. mw.text.jsonEncode(data) .. '", actual="' .. actual .. '", expected="' .. expected .. '"<br>\n' or ''
else
result = result .. '<br>\n'
end
return result
end
local test = function(geotype, data, expected, values)
values = values or {}
values.geotype = geotype;
values.data = data;
local result = p._parseGeoSequence(values)
if type(result) == 'table' then
local actual = mw.text.jsonEncode(result)
result = actual ~= expected and 'geotype="' .. geotype .. '", data="' .. data .. '", actual="' .. actual .. '", expected="' .. expected .. '"<br>\n' or ''
else
result = 'geotype="' .. geotype .. '", data="' .. data .. '", error="' .. result .. '<br>\n'
end
return result
end
local values = {' 9 , 8 ','7,6'}
local result = '' ..
testSeq({}, '[]') ..
testSeq({'\t\n 1 \r,-10'}, '[[-10,1]]') ..
testSeq(values, '[[8,9],[6,7]]') ..
test('Point', '1,2', '[2,1]') ..
test('MultiPoint', '1,2;3,4;5,6', '[[2,1],[4,3],[6,5]]') ..
test('LineString', '1,2;3,4', '[[2,1],[4,3]]') ..
test('MultiLineString', '1,2;3,4', '[[[2,1],[4,3]]]') ..
test('MultiLineString', '1,2;3,4;;5,6;7,8', '[[[2,1],[4,3]],[[6,5],[8,7]]]') ..
test('Polygon', '1,2;3,4;5,6;1,2', '[[[2,1],[4,3],[6,5],[2,1]]]') ..
test('MultiPolygon', '1,2;3,4;5,6;1,2', '[[[[2,1],[4,3],[6,5],[2,1]]]]') ..
test('MultiPolygon', '1,2;3,4;5,6;1,2;;11,12;13,14;15,16;11,12', '[[[[2,1],[4,3],[6,5],[2,1]],[[12,11],[14,13],[16,15],[12,11]]]]') ..
test('MultiPolygon', '1,2;3,4;5,6;1,2;;;11,12;13,14;15,16;11,12', '[[[[2,1],[4,3],[6,5],[2,1]]],[[[12,11],[14,13],[16,15],[12,11]]]]') ..
test('MultiPolygon', '1,2;3,4;5,6;1,2;;;11,12;13,14;15,16;11,12;;21,22;23,24;25,26;21,22', '[[[[2,1],[4,3],[6,5],[2,1]]],[[[12,11],[14,13],[16,15],[12,11]],[[22,21],[24,23],[26,25],[22,21]]]]') ..
test('MultiLineString', 'values;;1,2;3,4', '[[[8,9],[6,7]],[[2,1],[4,3]]]', values) ..
test('Polygon', 'world;;world', '[[[36000,-180],[36000,180],[-36000,180],[-36000,-180],[36000,-180]],[[36000,-180],[36000,180],[-36000,180],[-36000,-180],[36000,-180]]]') ..
''
return result ~= '' and result or 'Tests passed'
end
function p._tag(args)
local tagname = args.type or 'maplink'
if tagname ~= 'maplink' and tagname ~= 'mapframe' then error('unknown type "' .. tagname .. '"') end
local geojson
local tagArgs = {
text = args.text,
zoom = tonumber(args.zoom),
latitude = tonumber(args.latitude),
longitude = tonumber(args.longitude),
group = args.group,
show = args.show,
}
if tagname == 'mapframe' then
tagArgs.width = args.width == nil and 420 or args.width
tagArgs.height = args.height == nil and 420 or args.height
end
if args.data == '' then args.data = nil end
if (not args.geotype) ~= (not args.data) then
-- one is given, but not the other
if args.data then
error('Parameter "data" is given, but "geotype" is not set. Use one of these: Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon')
elseif args.geotype == "Point" and tagArgs.latitude ~= nil and tagArgs.longitude ~= nil then
-- For Point geotype, it is enough to set latitude and logitude, and data will be set up automatically
args.data = tagArgs.latitude .. ',' .. tagArgs.longitude
else
error('Parameter data must be set. Use "values" to use all unnamed parameters as coordinates (lat,lon|lat,lon|...), "world" for the whole world, a combination to make a mask, e.g. "world;;values", or direct values "lat,lon;lat,lon..." with ";" as value separator')
end
end
-- Kartographer can now automatically calculate needed zoom & lat/long based on the data provided
-- Current version ignores mapmasks, but that will also be fixed soon. Leaving this for now, but can be removed if all is good.
-- tagArgs.zoom = tagArgs.zoom == nil and 14 or tagArgs.zoom
-- tagArgs.latitude = tagArgs.latitude == nil and 51.47766 or tagArgs.latitude
-- tagArgs.longitude = tagArgs.longitude == nil and -0.00115 or tagArgs.longitude
if args.image then
args.description = (args.description or '') .. '[[file:' .. args.image .. '|300px]]'
end
if args.geotype then
geojson = {
type = "Feature",
properties = {
title = args.title,
description = args.description,
['marker-size'] = args['marker-size'],
['marker-symbol'] = args['marker-symbol'],
['marker-color'] = args['marker-color'],
stroke = args.stroke,
['stroke-opacity'] = tonumber(args['stroke-opacity']),
['stroke-width'] = tonumber(args['stroke-width']),
fill = args.fill,
['fill-opacity'] = tonumber(args['fill-opacity']),
},
geometry = {
type = args.geotype,
coordinates = p.parseGeoSequence(args)
}
}
end
if args.debug ~= nil then
local html = mw.html.create(tagname, not geojson and {selfClosing=true} or nil)
:attr(tagArgs)
if geojson then
html:wikitext( mw.text.jsonEncode(geojson, mw.text.JSON_PRETTY) )
end
return 'syntaxhighlight', tostring(html) .. mw.text.jsonEncode(args, mw.text.JSON_PRETTY), { lang = 'json' }
end
return tagname, geojson and mw.text.jsonEncode(geojson) or '', tagArgs
end
function p.tag(frame)
local args = getArgs(frame)
local tag, geojson, tagArgs = p._tag(args)
return frame:extensionTag(tag, geojson, tagArgs)
end
return p