124 lines
3.0 KiB
JavaScript
124 lines
3.0 KiB
JavaScript
/**
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* MapList is a list of maps with one active index.
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* It contains some utility functions to change the map.
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*
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* @export
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* @class MapList
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*/
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export class MapList {
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constructor(active = null, maps = {}) {
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this.maps = maps
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this.active = active
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if (Object.keys(maps).length > 0) this.select(active)
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}
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/**
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* Selects a map from the map list.
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*
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* @public
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* @param {string} active - Name of the map to select.
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* @returns {Map} - Returns the active map. Returns null if no map was added to the MapList.
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* @memberof MapList
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*/
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select(active) {
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let map = null
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if (active !== this.active) {
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let keys = Object.keys(this.maps)
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if (keys.length > 0) {
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if (this.maps[active] == null) {
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let altActive = keys[0]
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console.warn(
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`The MapList does not contain the provided active key '${active}'. Used '${altActive}' as fallback.`
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)
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active = altActive
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}
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if (this.active !== active) {
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this.active = active
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map = this.maps[active]
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}
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} else {
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console.error(`Could not provide a fallback map! The map object is empty.`)
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}
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}
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return map
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}
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/**
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* Clones the entire maplist.
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*
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* @public
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* @returns {MapList} - Returns a cloned instance of this map list.
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* @memberof MapList
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*/
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clone() {
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let maps = {}
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for (let name of Object.keys(this.maps)) {
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maps[name] = this.maps[name].clone()
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}
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return new MapList(this.active, maps)
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}
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/**
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* Adds a new map to the map list.
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*
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* @public
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* @param {string} key - Key to identify the map.
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* @param {GeoMap} map - The GeoMap to add.
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* @memberof MapList
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*/
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add(key, map) {
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if (this.maps[key] != null) consol.warn('Key already in mapList. The existing key was overwritten.')
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if (this.active == null) this.active = key
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map.name = key
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this.maps[key] = map
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}
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/**
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* Returns the the active map.
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* If none is set, it returns null.
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*
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*@public
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* @readonly
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* @memberof MapList
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*/
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get map() {
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return this.maps && this.maps[this.active] ? this.maps[this.active] : null
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}
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/**
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* Selects the next map in the map array.
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*
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* @public
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* @returns {GeoMap} - Returns the next map in the list.
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* @memberof MapList
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*/
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next() {
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let keys = Object.keys(this.maps)
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let idx = keys.indexOf(this.active)
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let next = idx + 1 < keys.length ? keys[idx + 1] : keys[0]
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return next
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}
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/**
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* Removes all maps from the maplist.
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* And cleans up all maps.
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*
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* @public
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* @memberof MapList
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*/
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cleanup() {
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for (let key in this.maps) {
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let map = this.maps[key]
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map.remove()
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}
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}
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}
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