70 lines
2.1 KiB
JavaScript
70 lines
2.1 KiB
JavaScript
var MBTiles = require('./lib/mbtiles'),
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utils = require('./lib/utils'),
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Step = require('step');
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module.exports = {
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MBTiles: MBTiles,
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utils: utils,
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pool: function(datasource) {
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return {
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create: function(callback) {
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var resource = new MBTiles(
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datasource,
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function() { callback(resource); }
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);
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},
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destroy: function(resource) {
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resource.db.close(function() {});
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}
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}
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},
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serve: function(resource, options, callback) {
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switch (options.format) {
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case 'layer.json':
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Step(
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function() {
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resource.metadata('formatter', this.parallel());
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resource.metadata('legend', this.parallel());
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},
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function(err, f, l) {
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var layer = {};
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f && (layer.formatter = f);
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l && (layer.legend = l);
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callback(null, [layer, { 'Content-Type': 'text/javascript' }]);
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}
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);
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break;
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case 'grid.json':
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resource.grid(options.x, options.y, options.z, function(err, grid) {
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callback(err, [grid, { 'Content-Type': 'text/javascript' }]);
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});
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break;
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default:
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resource.tile(options.x, options.y, options.z, function(err, image) {
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callback(err, [image, { 'Content-Type': 'image/png' }]);
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});
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break;
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}
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},
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store: function(step, resource, data, callback) {
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switch (step) {
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case 'setup':
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resource.setup(callback);
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break;
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case 'metadata':
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resource.insertMetadata(data, callback);
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break;
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case 'tiles':
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resource.insertTiles(data, callback);
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break;
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case 'grids':
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resource.insertGrids(data, callback);
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break;
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case 'finish':
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callback();
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break;
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}
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}
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};
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