79 lines
2.0 KiB
JavaScript
79 lines
2.0 KiB
JavaScript
'use strict';
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var async = require('async'),
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path = require('path'),
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fs = require('fs');
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var glyphCompose = require('glyph-pbf-composite');
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module.exports.getTileUrls = function(req, domains, path, format) {
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if (domains) {
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if (domains.constructor === String && domains.length > 0) {
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domains = domains.split(',');
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}
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}
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if (!domains || domains.length == 0) {
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domains = [req.headers.host];
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}
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var key = req.query.key;
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var query = (key && key.length > 0) ? ('?key=' + key) : '';
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var uris = [];
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domains.forEach(function(domain) {
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uris.push(req.protocol + '://' + domain + '/' + path +
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'/{z}/{x}/{y}.' + format + query);
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});
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return uris;
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};
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module.exports.fixTileJSONCenter = function(tileJSON) {
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if (tileJSON.bounds && !tileJSON.center) {
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var fitWidth = 1024;
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var tiles = fitWidth / 256;
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tileJSON.center = [
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(tileJSON.bounds[0] + tileJSON.bounds[2]) / 2,
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(tileJSON.bounds[1] + tileJSON.bounds[3]) / 2,
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Math.round(
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-Math.log((tileJSON.bounds[2] - tileJSON.bounds[0]) / 360 / tiles) /
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Math.LN2
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)
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];
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}
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};
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module.exports.getFontsPbf = function(allowedFonts, fontPath, names, range, callback) {
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var getFontPbf = function(name, range, callback) {
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if (!allowedFonts || allowedFonts[name]) {
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var filename = path.join(fontPath, name, range + '.pbf');
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return fs.readFile(filename, function(err, data) {
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if (err) {
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return callback(new Error('Font load error: ' + name));
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} else {
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return callback(null, data);
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}
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});
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} else {
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return callback(new Error('Font not allowed: ' + name));
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}
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};
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var fonts = names.split(',');
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var queue = [];
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fonts.forEach(function(font) {
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queue.push(function(callback) {
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getFontPbf(font, range, callback);
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});
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});
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return async.parallel(queue, function(err, results) {
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if (err) {
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callback(err, new Buffer([]));
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} else {
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callback(err, glyphCompose.combine(results));
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}
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});
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};
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