77 lines
2.6 KiB
JavaScript
77 lines
2.6 KiB
JavaScript
var queue = require('queue-async');
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var _ = require('underscore');
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function MapConfigNamedLayersAdapter(templateMaps) {
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this.templateMaps = templateMaps;
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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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var self = this;
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var adaptLayersQueue = queue(layers.length);
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function adaptLayer(layer, callback) {
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if (layer.type === 'named') {
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if (!layer.options.name) {
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return callback(new Error('Missing Named Map name in layer options'));
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}
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var templateName = layer.options.name;
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var templateConfigParams = layer.options.config || {};
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var templateAuthTokens = layer.options.auth_tokens;
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self.templateMaps.getTemplate(username, templateName, function(err, template) {
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if (err) {
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return callback(err);
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}
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if (self.templateMaps.isAuthorized(template, templateAuthTokens)) {
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var nestedNamedLayers = template.layergroup.layers.filter(function(layer) {
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return layer.type === 'named';
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});
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if (nestedNamedLayers.length > 0) {
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var nestedNamedMapsError = new Error('Nested named layers are not allowed');
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// nestedNamedMapsError.http_status = 400;
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return callback(nestedNamedMapsError);
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}
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try {
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var templateLayergroupConfig = self.templateMaps.instance(template, templateConfigParams);
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return callback(null, templateLayergroupConfig.layers);
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} catch (err) {
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return callback(err);
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}
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} else {
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var unauthorizedError = new Error('Unauthorized template instantiation');
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// unauthorizedError.http_status = 403;
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return callback(unauthorizedError);
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}
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});
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} else {
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return callback(null, layer);
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}
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}
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layers.forEach(function(layer) {
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adaptLayersQueue.defer(adaptLayer, layer);
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});
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function layersAdaptQueueFinish(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, _.flatten(layers));
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}
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adaptLayersQueue.awaitAll(layersAdaptQueueFinish);
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};
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