/**
* Create and return an OpenLayers filter object using the available
* dimensions filters configuration within the data source.
* @param {import("ngeo/datasource/OGC.js").default} dataSource Data source from which to create the
* filter.
* @return {?import("ol/format/filter/Filter.js").default} Filter
* @private
*/
createDimensionsFilterFromDataSource_(dataSource) {
const config = dataSource.dimensionsFiltersConfig || {};
const dimensions = dataSource.dimensions;
if (!dimensions) {
throw new Error('Missing dimensions');
}
const conditions = [];
for (const key in config) {
let value = config[key].value;
if (value === null) {
const dimensionValue = dimensions[key];
if (dimensionValue !== undefined && dimensionValue !== null) {
value = dimensionValue;
}
}
if (value !== null) {
conditions.push(olFormatFilter.equalTo(config[key].field, value, true));
}
}
if (conditions.length === 1) {
return conditions[0];
} else if (conditions.length >= 2) {
return olFormatFilter.and.apply(null, conditions);
}
return null;
}
/**
* Create a `ol.format.filter.Filter` object for a given data source.
* See the `CreateFilterOptions` to learn more.
*
* @param {CreateFilterOptions} options Options.
* @return {?import("ol/format/filter/Filter.js").default} Filter.
*/
createFilter(options) {
const dataSource = options.dataSource;
let mainFilter = null;
if (options.filter) {
mainFilter = options.filter;
} else {
const rules = options.filterRules || dataSource.filterRules;
const conditions = [];
if (rules && rules.length) {
for (const rule of rules) {
const filter = this.createFilterFromRule_(
rule,
dataSource,
options.srsName
);
if (filter) {
conditions.push(filter);
}
}
}
const condition = dataSource.filterCondition;
if (conditions.length === 1) {
mainFilter = conditions[0];
} else if (conditions.length >= 2) {
if (condition === ngeoFilterCondition.AND) {
mainFilter = olFormatFilter.and.apply(null, conditions);
} else if (condition === ngeoFilterCondition.OR ||
condition === ngeoFilterCondition.NOT
) {
mainFilter = olFormatFilter.or.apply(null, conditions);
}
}
if (mainFilter && condition === ngeoFilterCondition.NOT) {
mainFilter = olFormatFilter.not(mainFilter);
}
}
if (options.incTime) {
const timeFilter = this.createTimeFilterFromDataSource_(dataSource);
if (timeFilter) {
if (mainFilter) {
mainFilter = olFormatFilter.and.apply(
null,
[
mainFilter,
timeFilter
]
);
} else {
mainFilter = timeFilter;
}
}
}
if (options.incDimensions) {
const dimensionsFilter = this.createDimensionsFilterFromDataSource_(dataSource);
if (dimensionsFilter) {
if (mainFilter) {
mainFilter = olFormatFilter.and.apply(null, [mainFilter, dimensionsFilter]);
} else {
mainFilter = dimensionsFilter;
}
}
}
return mainFilter;
}