73 lines
1.8 KiB
JavaScript
73 lines
1.8 KiB
JavaScript
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var _ = require('underscore');
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var legendsMetadata = require('./legends-metadata');
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var CUSTOM_ATTRIBUTES = ['title'];
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var instance;
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var legends;
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var State = (function () {
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var getType = function (type) {
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var legend = legendsMetadata[type];
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return legend && legend.legendType;
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};
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var onLayerAdded = function (layer) {
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instance[layer.id] = {};
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};
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var onLayerRemoved = function (layer) {
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delete instance[layer.id];
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};
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return {
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init: function (layersDefinitionCollection, legendsDefinitionCollection) {
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if (!instance) {
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instance = {};
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layersDefinitionCollection.on('add', onLayerAdded);
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layersDefinitionCollection.on('remove', onLayerRemoved);
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legends = legendsDefinitionCollection;
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this.reset();
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}
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},
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reset: function () {
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legends.each(function (legend) {
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var layer = legend.layerDefinitionModel;
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if (!instance[layer.id]) {
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instance[layer.id] = {};
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}
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var legendType = getType(legend.get('type'));
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if (!instance[layer.id][legendType]) {
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instance[layer.id][legendType] = {};
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}
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var state = _.pick(legend.attributes, legend.attributes.conf.columns);
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instance[layer.id][legendType] = state;
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});
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},
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set: function (layer, type, attrs) {
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var attributes = _.pick(attrs, CUSTOM_ATTRIBUTES);
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var legendType = getType(type);
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if (instance && legendType) {
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if (!instance[layer.id]) {
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instance[layer.id] = {};
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}
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instance[layer.id][legendType] = attributes;
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}
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},
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get: function (layer, type) {
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var legendType = getType(type);
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return instance && legendType && instance[layer.id] && instance[layer.id][legendType];
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},
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getInstance: function () {
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return instance;
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}
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};
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})();
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module.exports = State;
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