mapcomplete/Utils.ts
2020-10-04 01:04:46 +02:00

205 lines
6.6 KiB
TypeScript

import {UIElement} from "./UI/UIElement";
import * as $ from "jquery"
import {FixedUiElement} from "./UI/Base/FixedUiElement";
export class Utils {
static EncodeXmlValue(str) {
return str.replace(/&/g, '&')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
}
/**
* Gives a clean float, or undefined if parsing fails
* @param str
*/
static asFloat(str): number {
if (str) {
const i = parseFloat(str);
if (isNaN(i)) {
return undefined;
}
return i;
}
return undefined;
}
public static Upper(str: string) {
return str.substr(0, 1).toUpperCase() + str.substr(1);
}
public static TwoDigits(i: number) {
if (i < 10) {
return "0" + i;
}
return "" + i;
}
public static Times(f: ((i: number) => string), count: number): string {
let res = "";
for (let i = 0; i < count; i++) {
res += f(i);
}
return res;
}
static DoEvery(millis: number, f: (() => void)) {
if (UIElement.runningFromConsole) {
return;
}
window.setTimeout(
function () {
f();
Utils.DoEvery(millis, f);
}
, millis)
}
public static NoNull<T>(array: T[]): T[] {
const ls: T[] = [];
for (const t of array) {
if (t === undefined || t === null) {
continue;
}
ls.push(t);
}
return ls;
}
public static NoEmpty(array: string[]): string[]{
const ls: string[] = [];
for (const t of array) {
if (t === "") {
continue;
}
ls.push(t);
}
return ls;
}
public static EllipsesAfter(str : string, l : number = 100){
if(str === undefined){
return undefined;
}
if(str.length <= l){
return str;
}
return str.substr(0, l - 3)+"...";
}
public static Dedup(arr: string[]):string[]{
if(arr === undefined){
return undefined;
}
const newArr = [];
for (const string of arr) {
if (newArr.indexOf(string) < 0) {
newArr.push(string);
}
}
return newArr;
}
public static MergeTags(a: any, b: any) {
const t = {};
for (const k in a) {
t[k] = a[k];
}
for (const k in b) {
t[k] = b[k];
}
return t;
}
public static SplitFirst(a: string, sep: string): string[] {
const index = a.indexOf(sep);
if (index < 0) {
return [a];
}
return [a.substr(0, index), a.substr(index + sep.length)];
}
public static isRetina(): boolean {
if (UIElement.runningFromConsole) {
return;
}
// The cause for this line of code: https://github.com/pietervdvn/MapComplete/issues/115
// See https://stackoverflow.com/questions/19689715/what-is-the-best-way-to-detect-retina-support-on-a-device-using-javascript
return ((window.matchMedia && (window.matchMedia('only screen and (min-resolution: 192dpi), only screen and (min-resolution: 2dppx), only screen and (min-resolution: 75.6dpcm)').matches || window.matchMedia('only screen and (-webkit-min-device-pixel-ratio: 2), only screen and (-o-min-device-pixel-ratio: 2/1), only screen and (min--moz-device-pixel-ratio: 2), only screen and (min-device-pixel-ratio: 2)').matches)) || (window.devicePixelRatio && window.devicePixelRatio >= 2));
}
// Date will be undefined on failure
public static changesetDate(id: number, action: ((isFound: Date) => void)): void {
$.getJSON("https://www.openstreetmap.org/api/0.6/changeset/" + id,
function (data) {
console.log(data)
action(new Date(data.elements[0].created_at));
})
.fail(() => {
action(undefined);
});
}
public static generateStats(action:(stats:string) => void) {
// Binary searches the latest changeset
function search(lowerBound: number,
upperBound: number,
onCsFound: ((id: number, lastDate: Date) => void),
depth = 0) {
if (depth > 30) {
return;
}
const tested = Math.floor((lowerBound + upperBound) / 2);
console.log("Testing", tested)
Utils.changesetDate(tested, (createdAtDate: Date) => {
new FixedUiElement(`Searching, value between ${lowerBound} and ${upperBound}. Queries till now: ${depth}`).AttachTo('maindiv')
if (lowerBound + 1 >= upperBound) {
onCsFound(lowerBound, createdAtDate);
return;
}
if (createdAtDate !== undefined) {
search(tested, upperBound, onCsFound, depth + 1)
} else {
search(lowerBound, tested, onCsFound, depth + 1);
}
})
}
search(91000000, 100000000, (last, lastDate: Date) => {
const link = "http://osm.org/changeset/" + last;
const delta = 100000;
Utils.changesetDate(last - delta, (prevDate) => {
const diff = (lastDate.getTime() - prevDate.getTime()) / 1000;
// Diff: seconds needed/delta changesets
const secsPerCS = diff / delta;
const stillNeeded = 1000000 - (last % 1000000);
const timeNeededSeconds = Math.floor(secsPerCS * stillNeeded);
const secNeeded = timeNeededSeconds % 60;
const minNeeded = Math.floor(timeNeededSeconds / 60) % 60;
const hourNeeded = Math.floor(timeNeededSeconds / (60 * 60)) % 24;
const daysNeeded = Math.floor(timeNeededSeconds / (24 * 60 * 60));
const result = `Last changeset: <a href='${link}'>${link}</a><br/>We needed ${(Math.floor(diff / 60))} minutes for the last ${delta} changesets.<br/>
This is around ${secsPerCS} seconds/changeset.<br/> The next million (still ${stillNeeded} away) will be broken in around ${daysNeeded} days ${hourNeeded}:${minNeeded}:${secNeeded}`
action(result);
})
}
);
}
}