71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
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const Backbone = require('backbone');
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const MapLayer = require('dashboard/data/map-layer-model');
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const checkAndBuildOpts = require('builder/helpers/required-opts');
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const TILED_LAYER_TYPE = 'Tiled';
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const CARTODB_LAYER_TYPE = 'CartoDB';
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const TORQUE_LAYER_TYPE = 'torque';
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const REQUIRED_OPTS = [
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'configModel'
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];
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const LayersCollection = Backbone.Collection.extend({
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model: MapLayer,
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initialize: function (models, options) {
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checkAndBuildOpts(options, REQUIRED_OPTS, this);
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this.comparator = function (m) {
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return parseInt(m.get('order'), 10);
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};
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this.bind('add', this._assignIndexes);
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this.bind('remove', this._assignIndexes);
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},
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url: function (method) {
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var version = this._configModel.urlVersion('layer', method);
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return `/api/${version}/maps/${this.map.id}/layers`;
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},
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parse: function (data) {
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return data.layers;
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},
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/**
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* each time a layer is added or removed
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* the index should be recalculated
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*/
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_assignIndexes: function (model, col, options) {
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if (this.size() > 0) {
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// Assign an order of 0 to the first layer
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this.at(0).set({ order: 0 });
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if (this.size() > 1) {
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var layersByType = {};
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for (var i = 1; i < this.size(); ++i) {
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var layer = this.at(i);
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var layerType = layer.get('type');
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layersByType[layerType] = layersByType[layerType] || [];
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layersByType[layerType].push(layer);
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}
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var lastOrder = 0;
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var sortedTypes = [CARTODB_LAYER_TYPE, TORQUE_LAYER_TYPE, TILED_LAYER_TYPE];
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for (var index = 0; index < sortedTypes.length; ++index) {
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var type = sortedTypes[index];
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var layers = layersByType[type] || [];
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for (var j = 0; j < layers.length; ++j) {
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var layerModel = layers[j];
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layerModel.set({
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order: ++lastOrder
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});
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}
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}
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}
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}
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}
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});
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module.exports = LayersCollection;
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