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Refactor area-based static maps urls

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This commit is contained in:
Petr Sloup 2016-06-27 07:18:48 +02:00
parent 9d63634078
commit 900ca4ed3e
1 changed files with 34 additions and 28 deletions
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62
src/serve_rendered.js
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@ -376,12 +376,32 @@ module.exports = function(options, repo, params, id) {
return canvas.toBuffer(); return canvas.toBuffer();
}; };
var calcZForBBox = function(bbox, w, h, query) {
var z = 25;
var padding = query.padding !== undefined ?
parseFloat(query.padding) : 0.1;
var minCorner = mercator.px([bbox[0], bbox[3]], z),
maxCorner = mercator.px([bbox[2], bbox[1]], z);
while ((((maxCorner[0] - minCorner[0]) * (1 + 2 * padding) > w) ||
((maxCorner[1] - minCorner[1]) * (1 + 2 * padding) > h)) && z > 0) {
z--;
minCorner[0] /= 2;
minCorner[1] /= 2;
maxCorner[0] /= 2;
maxCorner[1] /= 2;
}
return z;
};
var staticPattern = var staticPattern =
'/static/%s:scale(' + SCALE_PATTERN + ')?\.:format([\\w]+)'; '/static/%s/:width(\\d+)x:height(\\d+)' +
':scale(' + SCALE_PATTERN + ')?\.:format([\\w]+)';
var centerPattern = var centerPattern =
util.format(':lon(%s),:lat(%s),:z(\\d+):bearing(,%s)?:pitch(,%s)?/' + util.format(':lon(%s),:lat(%s),:z(\\d+):bearing(,%s)?:pitch(,%s)?',
':width(\\d+)x:height(\\d+)',
FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN); FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN);
app.get(util.format(staticPattern, centerPattern), function(req, res, next) { app.get(util.format(staticPattern, centerPattern), function(req, res, next) {
@ -404,23 +424,23 @@ module.exports = function(options, repo, params, id) {
}); });
var boundsPattern = var boundsPattern =
util.format(':minx(%s),:miny(%s),:maxx(%s),:maxy(%s)/:z(\\d+)', util.format(':minx(%s),:miny(%s),:maxx(%s),:maxy(%s)',
FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN); FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN, FLOAT_PATTERN);
app.get(util.format(staticPattern, boundsPattern), function(req, res, next) { app.get(util.format(staticPattern, boundsPattern), function(req, res, next) {
var bbox = [+req.params.minx, +req.params.miny, var bbox = [+req.params.minx, +req.params.miny,
+req.params.maxx, +req.params.maxy]; +req.params.maxx, +req.params.maxy];
var z = req.params.z | 0, var w = req.params.width | 0,
h = req.params.height | 0,
scale = getScale(req.params.scale),
format = req.params.format;
var z = calcZForBBox(bbox, w, h, req.query),
x = (bbox[0] + bbox[2]) / 2, x = (bbox[0] + bbox[2]) / 2,
y = (bbox[1] + bbox[3]) / 2, y = (bbox[1] + bbox[3]) / 2,
bearing = 0, bearing = 0,
pitch = 0; pitch = 0;
var minCorner = mercator.px([bbox[0], bbox[3]], z),
maxCorner = mercator.px([bbox[2], bbox[1]], z);
var w = (maxCorner[0] - minCorner[0]) | 0,
h = (maxCorner[1] - minCorner[1]) | 0,
scale = getScale(req.params.scale),
format = req.params.format;
var path = extractPathFromQuery(req.query); var path = extractPathFromQuery(req.query);
var overlay = renderOverlay(z, x, y, bearing, pitch, w, h, scale, var overlay = renderOverlay(z, x, y, bearing, pitch, w, h, scale,
path, req.query); path, req.query);
@ -428,9 +448,9 @@ module.exports = function(options, repo, params, id) {
res, next, overlay); res, next, overlay);
}); });
var pathPattern = 'auto/:width(\\d+)x:height(\\d+)'; var autoPattern = 'auto';
app.get(util.format(staticPattern, pathPattern), function(req, res, next) { app.get(util.format(staticPattern, autoPattern), function(req, res, next) {
var path = extractPathFromQuery(req.query); var path = extractPathFromQuery(req.query);
if (path.length < 2) { if (path.length < 2) {
return res.status(400).send('Invalid path'); return res.status(400).send('Invalid path');
@ -451,24 +471,10 @@ module.exports = function(options, repo, params, id) {
bbox[3] = Math.max(bbox[3], pair[1]); bbox[3] = Math.max(bbox[3], pair[1]);
}); });
var z = 20, var z = calcZForBBox(bbox, w, h, req.query),
x = (bbox[0] + bbox[2]) / 2, x = (bbox[0] + bbox[2]) / 2,
y = (bbox[1] + bbox[3]) / 2; y = (bbox[1] + bbox[3]) / 2;
var padding = req.query.padding !== undefined ?
parseFloat(req.query.padding) : 0.1;
var minCorner = mercator.px([bbox[0], bbox[3]], z),
maxCorner = mercator.px([bbox[2], bbox[1]], z);
while ((((maxCorner[0] - minCorner[0]) * (1 + 2 * padding) > w) ||
((maxCorner[1] - minCorner[1]) * (1 + 2 * padding) > h)) && z > 0) {
z--;
minCorner[0] /= 2;
minCorner[1] /= 2;
maxCorner[0] /= 2;
maxCorner[1] /= 2;
}
var overlay = renderOverlay(z, x, y, bearing, pitch, w, h, scale, var overlay = renderOverlay(z, x, y, bearing, pitch, w, h, scale,
path, req.query); path, req.query);