forked from MapComplete/MapComplete
111 lines
3.4 KiB
TypeScript
111 lines
3.4 KiB
TypeScript
/**
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* Wraps the query parameters into UIEventSources
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*/
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import { UIEventSource } from "../UIEventSource"
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import Hash from "./Hash"
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import { Utils } from "../../Utils"
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export class QueryParameters {
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static defaults = {}
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static documentation: Map<string, string> = new Map<string, string>()
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private static order: string[] = ["layout", "test", "z", "lat", "lon"]
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private static _wasInitialized: Set<string> = new Set()
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private static knownSources = {}
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private static initialized = false
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public static GetQueryParameter(
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key: string,
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deflt: string,
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documentation?: string
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): UIEventSource<string> {
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if (!this.initialized) {
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this.init()
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}
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QueryParameters.documentation.set(key, documentation)
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if (deflt !== undefined) {
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QueryParameters.defaults[key] = deflt
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}
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if (QueryParameters.knownSources[key] !== undefined) {
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return QueryParameters.knownSources[key]
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}
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QueryParameters.addOrder(key)
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const source = new UIEventSource<string>(deflt, "&" + key)
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QueryParameters.knownSources[key] = source
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source.addCallback(() => QueryParameters.Serialize())
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return source
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}
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public static GetBooleanQueryParameter(
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key: string,
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deflt: boolean,
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documentation?: string
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): UIEventSource<boolean> {
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return QueryParameters.GetQueryParameter(key, "" + deflt, documentation).sync(
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(str) => str === "true",
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[],
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(b) => "" + b
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)
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}
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public static wasInitialized(key: string): boolean {
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return QueryParameters._wasInitialized.has(key)
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}
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private static addOrder(key) {
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if (this.order.indexOf(key) < 0) {
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this.order.push(key)
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}
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}
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private static init() {
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if (this.initialized) {
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return
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}
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this.initialized = true
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if (Utils.runningFromConsole) {
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return
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}
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if (window?.location?.search) {
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const params = window.location.search.substr(1).split("&")
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for (const param of params) {
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const kv = param.split("=")
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const key = decodeURIComponent(kv[0])
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QueryParameters.addOrder(key)
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QueryParameters._wasInitialized.add(key)
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const v = decodeURIComponent(kv[1])
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const source = new UIEventSource<string>(v)
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source.addCallback(() => QueryParameters.Serialize())
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QueryParameters.knownSources[key] = source
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}
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}
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}
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private static Serialize() {
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const parts = []
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for (const key of QueryParameters.order) {
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if (QueryParameters.knownSources[key]?.data === undefined) {
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continue
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}
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if (QueryParameters.knownSources[key].data === "undefined") {
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continue
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}
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if (QueryParameters.knownSources[key].data === QueryParameters.defaults[key]) {
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continue
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}
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parts.push(
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encodeURIComponent(key) +
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"=" +
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encodeURIComponent(QueryParameters.knownSources[key].data)
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)
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}
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if (!Utils.runningFromConsole) {
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// Don't pollute the history every time a parameter changes
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history.replaceState(null, "", "?" + parts.join("&") + Hash.Current())
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}
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}
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}
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