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import StyleLayer from './style_layer';
import createStyleLayer from './create_style_layer';
import {values} from '../util/util';
import featureFilter from '../style-spec/feature_filter';
import groupByLayout from '../style-spec/group_by_layout';
import type {TypedStyleLayer} from './style_layer/typed_style_layer';
import type {LayerSpecification} from '../style-spec/types';
export type LayerConfigs = {[_: string]: LayerSpecification };
export type Family<Layer: TypedStyleLayer> = Array<Layer>;
class StyleLayerIndex {
familiesBySource: { [source: string]: { [sourceLayer: string]: Array<Family<*>> } };
keyCache: { [source: string]: string };
_layerConfigs: LayerConfigs;
_layers: {[_: string]: StyleLayer };
constructor(layerConfigs: ?Array<LayerSpecification>) {
this.keyCache = {};
if (layerConfigs) {
this.replace(layerConfigs);
}
}
replace(layerConfigs: Array<LayerSpecification>) {
this._layerConfigs = {};
this._layers = {};
this.update(layerConfigs, []);
}
update(layerConfigs: Array<LayerSpecification>, removedIds: Array<string>) {
for (const layerConfig of layerConfigs) {
this._layerConfigs[layerConfig.id] = layerConfig;
const layer = this._layers[layerConfig.id] = createStyleLayer(layerConfig);
layer._featureFilter = featureFilter(layer.filter);
if (this.keyCache[layerConfig.id])
delete this.keyCache[layerConfig.id];
}
for (const id of removedIds) {
delete this.keyCache[id];
delete this._layerConfigs[id];
delete this._layers[id];
}
this.familiesBySource = {};
const groups = groupByLayout(values(this._layerConfigs), this.keyCache);
for (const layerConfigs of groups) {
const layers = layerConfigs.map((layerConfig) => this._layers[layerConfig.id]);
const layer = layers[0];
if (layer.visibility === 'none') {
continue;
}
const sourceId = layer.source || '';
let sourceGroup = this.familiesBySource[sourceId];
if (!sourceGroup) {
sourceGroup = this.familiesBySource[sourceId] = {};
}
const sourceLayerId = layer.sourceLayer || '_geojsonTileLayer';
let sourceLayerFamilies = sourceGroup[sourceLayerId];
if (!sourceLayerFamilies) {
sourceLayerFamilies = sourceGroup[sourceLayerId] = [];
}
sourceLayerFamilies.push(layers);
}
}
}
export default StyleLayerIndex;
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