@geogirafe/lib-geoportal/tools/share/serializers/selectionserializer.js

GeoGirafe is a flexible application to build online geoportals.

import { deserializeWfsFilter, serializeWfsFilter } from './wfsfilterserializer.js';
export default class SelectionSerializer {
    context;
    constructor(context) {
        this.context = context;
    }
    get state() {
        return this.context.stateManager.state;
    }
    brainSerialize(selection) {
        if (selection.selectionParameters.length > 0) {
            // Note: Currently only the first selection parameter is serialized
            return JSON.stringify(this.getSerializedSelectionParameter(selection.selectionParameters[0]));
        }
        return '';
    }
    brainDeserialize(str) {
        if (str.trim().length > 0) {
            const shareState = JSON.parse(str);
            if (shareState.selectionQuery) {
                this.state.selection.initialSelectionQuery = this.getDeserializedSelectionQuery(shareState);
            }
            else if (shareState.selectionBox) {
                this.state.selection.initialSelectionBox = shareState.selectionBox;
            }
        }
    }
    getSerializedSelectionParameter(selectionParam) {
        let serializedSelectionQuery = undefined;
        if (selectionParam.selectionQuery) {
            serializedSelectionQuery = {
                query: serializeWfsFilter(selectionParam.selectionQuery),
                layerName: selectionParam.layers[0].name
            };
        }
        return {
            selectionBox: selectionParam.selectionBox ?? undefined,
            selectionQuery: serializedSelectionQuery
        };
    }
    getDeserializedSelectionQuery(sharedSelection) {
        if (!sharedSelection.selectionQuery) {
            return undefined;
        }
        return {
            query: deserializeWfsFilter(sharedSelection.selectionQuery.query),
            layerName: sharedSelection.selectionQuery?.layerName
        };
    }
}