73 lines
No EOL
2.3 KiB
TypeScript
73 lines
No EOL
2.3 KiB
TypeScript
/**
|
|
* Wraps the query parameters into UIEventSources
|
|
*/
|
|
import {UIEventSource} from "../UI/UIEventSource";
|
|
import {UIElement} from "../UI/UIElement";
|
|
|
|
export class QueryParameters {
|
|
|
|
private static order: string [] = ["layout","test","z","lat","lon"];
|
|
private static knownSources = {};
|
|
private static initialized = false;
|
|
private static defaults = {}
|
|
|
|
private static addOrder(key){
|
|
if(this.order.indexOf(key) < 0){
|
|
this.order.push(key)
|
|
}
|
|
}
|
|
|
|
private static init() {
|
|
|
|
if(this.initialized){
|
|
return;
|
|
}
|
|
this.initialized = true;
|
|
|
|
if (window?.location?.search) {
|
|
const params = window.location.search.substr(1).split("&");
|
|
for (const param of params) {
|
|
const kv = param.split("=");
|
|
const key = kv[0];
|
|
QueryParameters.addOrder(key)
|
|
const v = kv[1];
|
|
const source = new UIEventSource<string>(v);
|
|
source.addCallback(() => QueryParameters.Serialize())
|
|
QueryParameters.knownSources[key] = source;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static Serialize() {
|
|
const parts = []
|
|
for (const key of QueryParameters.order) {
|
|
if (QueryParameters.knownSources[key] === undefined || QueryParameters.knownSources[key].data === undefined) {
|
|
continue;
|
|
}
|
|
if (QueryParameters.knownSources[key].data == QueryParameters.defaults[key]) {
|
|
continue;
|
|
}
|
|
parts.push(encodeURIComponent(key) + "=" + encodeURIComponent(QueryParameters.knownSources[key].data))
|
|
}
|
|
history.replaceState(null, "", "?" + parts.join("&"));
|
|
|
|
}
|
|
|
|
public static GetQueryParameter(key: string, deflt: string): UIEventSource<string> {
|
|
if(!this.initialized){
|
|
this.init();
|
|
}
|
|
if (deflt !== undefined) {
|
|
QueryParameters.defaults[key] = deflt;
|
|
}
|
|
if (QueryParameters.knownSources[key] !== undefined) {
|
|
return QueryParameters.knownSources[key];
|
|
}
|
|
QueryParameters.addOrder(key);
|
|
const source = new UIEventSource<string>(deflt);
|
|
QueryParameters.knownSources[key] = source;
|
|
source.addCallback(() => QueryParameters.Serialize())
|
|
return source;
|
|
}
|
|
|
|
} |