49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
var queue = require('queue-async');
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var _ = require('underscore');
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function MapConfigNamedLayersAdapter(overviewsApi) {
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this.overviewsApi = overviewsApi;
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}
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module.exports = MapConfigNamedLayersAdapter;
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MapConfigNamedLayersAdapter.prototype.getLayers = function(username, layers, callback) {
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if (!layers) {
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return callback(null);
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}
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var augmentLayersQueue = queue(layers.length);
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function augmentLayer(layer, done) {
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this.overviewsApi.getOverviewsMetadata(username, layer.options.sql, function(err, metadata){
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if ( !_.isEmpty(metadata) ) {
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layer = _.extend({}, layer, { overviews: metadata });
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}
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done(null, layer);
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});
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}
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function layersAugmentQueueFinish(err, layers) {
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if (err) {
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return callback(err);
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}
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if (!layers || layers.length === 0) {
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return callback(new Error('Missing layers array from layergroup config'));
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}
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return callback(null, layers);
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}
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layers.forEach(function(layer) {
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augmentLayersQueue.defer(augmentLayer, layer);
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});
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augmentLayersQueue.awaitAll(layersAugmentQueueFinish);
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};
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// TODO: document in https://github.com/CartoDB/Windshaft/blob/master/doc/MapConfig-1.5.0.md
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// (as OPTIONAL)
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// overviews: { table_name: { zoom_level: { table: overview_table_name } }}
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