465 lines
15 KiB
TypeScript
465 lines
15 KiB
TypeScript
import * as colors from "./assets/colors.json"
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import {TileRange} from "./Models/TileRange";
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export class Utils {
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/**
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* In the 'deploy'-step, some code needs to be run by ts-node.
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* However, ts-node crashes when it sees 'document'. When running from console, we flag this and disable all code where document is needed.
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* This is a workaround and yet another hack
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*/
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public static runningFromConsole = false;
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public static readonly assets_path = "./assets/svg/";
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public static externalDownloadFunction: (url: string) => Promise<any>;
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private static knownKeys = ["addExtraTags", "and", "calculatedTags", "changesetmessage", "clustering", "color", "condition", "customCss", "dashArray", "defaultBackgroundId", "description", "descriptionTail", "doNotDownload", "enableAddNewPoints", "enableBackgroundLayerSelection", "enableGeolocation", "enableLayers", "enableMoreQuests", "enableSearch", "enableShareScreen", "enableUserBadge", "freeform", "hideFromOverview", "hideInAnswer", "icon", "iconOverlays", "iconSize", "id", "if", "ifnot", "isShown", "key", "language", "layers", "lockLocation", "maintainer", "mappings", "maxzoom", "maxZoom", "minNeededElements", "minzoom", "multiAnswer", "name", "or", "osmTags", "passAllFeatures", "presets", "question", "render", "roaming", "roamingRenderings", "rotation", "shortDescription", "socialImage", "source", "startLat", "startLon", "startZoom", "tagRenderings", "tags", "then", "title", "titleIcons", "type", "version", "wayHandling", "widenFactor", "width"]
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private static extraKeys = ["nl", "en", "fr", "de", "pt", "es", "name", "phone", "email", "amenity", "leisure", "highway", "building", "yes", "no", "true", "false"]
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static EncodeXmlValue(str) {
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if (typeof str !== "string") {
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str = "" + str
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}
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return str.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''')
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}
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/**
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* Gives a clean float, or undefined if parsing fails
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* @param str
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*/
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static asFloat(str): number {
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if (str) {
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const i = parseFloat(str);
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if (isNaN(i)) {
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return undefined;
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}
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return i;
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}
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return undefined;
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}
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public static Upper(str: string) {
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return str.substr(0, 1).toUpperCase() + str.substr(1);
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}
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public static TwoDigits(i: number) {
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if (i < 10) {
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return "0" + i;
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}
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return "" + i;
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}
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public static Round(i: number) {
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if (i < 0) {
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return "-" + Utils.Round(-i);
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}
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const j = "" + Math.floor(i * 10);
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if (j.length == 1) {
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return "0." + j;
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}
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return j.substr(0, j.length - 1) + "." + j.substr(j.length - 1, j.length);
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}
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public static Times(f: ((i: number) => string), count: number): string {
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let res = "";
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for (let i = 0; i < count; i++) {
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res += f(i);
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}
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return res;
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}
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public static TimesT<T>(count: number, f: ((i: number) => T)): T[] {
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let res: T[] = [];
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for (let i = 0; i < count; i++) {
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res.push(f(i));
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}
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return res;
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}
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static DoEvery(millis: number, f: (() => void)) {
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if (Utils.runningFromConsole) {
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return;
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}
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window.setTimeout(
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function () {
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f();
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Utils.DoEvery(millis, f);
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}
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, millis)
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}
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public static NoNull<T>(array: T[]): T[] {
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const ls: T[] = [];
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for (const t of array) {
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if (t === undefined || t === null) {
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continue;
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}
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ls.push(t);
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}
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return ls;
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}
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public static NoEmpty(array: string[]): string[] {
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const ls: string[] = [];
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for (const t of array) {
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if (t === "") {
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continue;
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}
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ls.push(t);
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}
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return ls;
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}
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public static EllipsesAfter(str: string, l: number = 100) {
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if (str === undefined || str === null) {
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return undefined;
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}
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if (str.length <= l) {
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return str;
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}
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return str.substr(0, l - 3) + "...";
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}
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public static Dedup(arr: string[]): string[] {
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if (arr === undefined) {
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return undefined;
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}
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const newArr = [];
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for (const string of arr) {
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if (newArr.indexOf(string) < 0) {
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newArr.push(string);
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}
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}
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return newArr;
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}
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public static MergeTags(a: any, b: any) {
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const t = {};
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for (const k in a) {
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t[k] = a[k];
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}
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for (const k in b) {
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t[k] = b[k];
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}
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return t;
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}
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public static SplitFirst(a: string, sep: string): string[] {
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const index = a.indexOf(sep);
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if (index < 0) {
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return [a];
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}
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return [a.substr(0, index), a.substr(index + sep.length)];
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}
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public static SubstituteKeys(txt: string, tags: any) {
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for (const key in tags) {
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if (!tags.hasOwnProperty(key)) {
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continue
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}
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txt = txt.replace(new RegExp("{" + key + "}", "g"), tags[key])
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}
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return txt;
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}
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public static LoadCustomCss(location: string) {
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const head = document.getElementsByTagName('head')[0];
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const link = document.createElement('link');
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link.id = "customCss";
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link.rel = 'stylesheet';
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link.type = 'text/css';
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link.href = location;
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link.media = 'all';
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head.appendChild(link);
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console.log("Added custom layout ", location)
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}
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/**
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* Copies all key-value pairs of the source into the target.
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* If the key starts with a '+', the values of the list will be appended to the target instead of overwritten
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* @param source
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* @param target
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* @constructor
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*/
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static Merge(source: any, target: any) {
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for (const key in source) {
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if (!source.hasOwnProperty(key)) {
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continue
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}
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if (key.startsWith("+") || key.endsWith("+")) {
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const trimmedKey = key.replace("+", "");
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const sourceV = source[key];
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const targetV = (target[trimmedKey] ?? [])
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let newList: any[];
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if (key.startsWith("+")) {
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newList = sourceV.concat(targetV)
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} else {
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newList = targetV.concat(sourceV)
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}
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target[trimmedKey] = newList;
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continue;
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}
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const sourceV = source[key];
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const targetV = target[key]
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if (sourceV?.length !== undefined && targetV?.length !== undefined && key.startsWith("+")) {
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target[key] = targetV.concat(sourceV)
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} else if (typeof sourceV === "object") {
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if (sourceV === null) {
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target[key] = null
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} else if (targetV === undefined) {
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target[key] = sourceV;
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} else {
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Utils.Merge(sourceV, targetV);
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}
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} else {
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target[key] = sourceV;
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}
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}
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return target;
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}
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static getOrSetDefault<K, V>(dict: Map<K, V>, k: K, v: () => V) {
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let found = dict.get(k);
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if (found !== undefined) {
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return found;
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}
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dict.set(k, v());
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return dict.get(k);
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}
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/**
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* Calculates the tile bounds of the
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* @param z
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* @param x
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* @param y
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* @returns [[maxlat, minlon], [minlat, maxlon]]
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*/
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static tile_bounds(z: number, x: number, y: number): [[number, number], [number, number]] {
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return [[Utils.tile2lat(y, z), Utils.tile2long(x, z)], [Utils.tile2lat(y + 1, z), Utils.tile2long(x + 1, z)]]
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}
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/**
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* Return x, y of the tile containing (lat, lon) on the given zoom level
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*/
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static embedded_tile(lat: number, lon: number, z: number): { x: number, y: number, z: number } {
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return {x: Utils.lon2tile(lon, z), y: Utils.lat2tile(lat, z), z: z}
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}
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static TileRangeBetween(zoomlevel: number, lat0: number, lon0: number, lat1: number, lon1: number): TileRange {
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const t0 = Utils.embedded_tile(lat0, lon0, zoomlevel)
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const t1 = Utils.embedded_tile(lat1, lon1, zoomlevel)
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const xstart = Math.min(t0.x, t1.x)
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const xend = Math.max(t0.x, t1.x)
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const ystart = Math.min(t0.y, t1.y)
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const yend = Math.max(t0.y, t1.y)
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const total = (1 + xend - xstart) * (1 + yend - ystart)
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return {
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xstart: xstart,
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xend: xend,
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ystart: ystart,
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yend: yend,
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total: total,
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zoomlevel: zoomlevel
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}
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}
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public static MinifyJSON(stringified: string): string {
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stringified = stringified.replace(/\|/g, "||");
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const keys = Utils.knownKeys.concat(Utils.extraKeys);
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for (let i = 0; i < keys.length; i++) {
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const knownKey = keys[i];
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let code = i;
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if (i >= 124) {
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code += 1; // Character 127 is our 'escape' character |
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}
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let replacement = "|" + String.fromCharCode(code)
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stringified = stringified.replace(new RegExp(`\"${knownKey}\":`, "g"), replacement);
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}
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return stringified;
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}
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public static UnMinify(minified: string): string {
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if (minified === undefined || minified === null) {
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return undefined;
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}
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const parts = minified.split("|");
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let result = parts.shift();
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const keys = Utils.knownKeys.concat(Utils.extraKeys);
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for (const part of parts) {
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if (part == "") {
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// Empty string => this was a || originally
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result += "|"
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continue
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}
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const i = part.charCodeAt(0);
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result += "\"" + keys[i] + "\":" + part.substring(1)
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}
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return result;
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}
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public static MapRange<T>(tileRange: TileRange, f: (x: number, y: number) => T): T[] {
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const result: T[] = []
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for (let x = tileRange.xstart; x <= tileRange.xend; x++) {
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for (let y = tileRange.ystart; y <= tileRange.yend; y++) {
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const t = f(x, y);
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result.push(t)
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}
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}
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return result;
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}
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public static downloadJson(url: string): Promise<any> {
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if (this.externalDownloadFunction !== undefined) {
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return this.externalDownloadFunction(url)
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}
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return new Promise(
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(resolve, reject) => {
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try {
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const xhr = new XMLHttpRequest();
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xhr.onload = () => {
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if (xhr.status == 200) {
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try {
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resolve(JSON.parse(xhr.response))
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} catch (e) {
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reject("Not a valid json: " + xhr.response)
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}
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} else {
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reject(xhr.statusText)
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}
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};
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xhr.open('GET', url);
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xhr.setRequestHeader("accept", "application/json")
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xhr.send();
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} catch (e) {
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reject(e)
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}
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}
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)
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}
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/**
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* Triggers a 'download file' popup which will download the contents
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*/
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public static offerContentsAsDownloadableFile(contents: string | Blob, fileName: string = "download.txt",
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options?: { mimetype: string }) {
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const element = document.createElement("a");
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let file;
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if (typeof (contents) === "string") {
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file = new Blob([contents], {type: options?.mimetype ?? 'text/plain'});
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} else {
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file = contents;
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}
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element.href = URL.createObjectURL(file);
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element.download = fileName;
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document.body.appendChild(element); // Required for this to work in FireFox
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element.click();
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}
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public static ColourNameToHex(color: string): string {
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return colors[color.toLowerCase()] ?? color;
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}
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public static HexToColourName(hex: string): string {
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hex = hex.toLowerCase()
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if (!hex.startsWith("#")) {
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return hex;
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}
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const c = Utils.color(hex);
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let smallestDiff = Number.MAX_VALUE;
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let bestColor = undefined;
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for (const color in colors) {
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if (!colors.hasOwnProperty(color)) {
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continue;
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}
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const foundhex = colors[color];
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if (typeof foundhex !== "string") {
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continue
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}
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if (foundhex === hex) {
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return color
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}
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const diff = this.colorDiff(Utils.color(foundhex), c)
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if (diff > 50) {
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continue;
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}
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if (diff < smallestDiff) {
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smallestDiff = diff;
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bestColor = color;
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}
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}
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return bestColor ?? hex;
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}
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private static tile2long(x, z) {
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return (x / Math.pow(2, z) * 360 - 180);
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}
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private static tile2lat(y, z) {
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const n = Math.PI - 2 * Math.PI * y / Math.pow(2, z);
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return (180 / Math.PI * Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))));
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}
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private static lon2tile(lon, zoom) {
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return (Math.floor((lon + 180) / 360 * Math.pow(2, zoom)));
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}
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private static lat2tile(lat, zoom) {
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return (Math.floor((1 - Math.log(Math.tan(lat * Math.PI / 180) + 1 / Math.cos(lat * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, zoom)));
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}
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private static colorDiff(c0: { r: number, g: number, b: number }, c1: { r: number, g: number, b: number }) {
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return Math.abs(c0.r - c1.r) + Math.abs(c0.g - c1.g) + Math.abs(c0.b - c1.b);
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}
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private static color(hex: string): { r: number, g: number, b: number } {
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if (hex.startsWith == undefined) {
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console.trace("WUT?", hex)
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throw "wut?"
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}
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if (!hex.startsWith("#")) {
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return undefined;
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}
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if (hex.length === 4) {
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return {
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r: parseInt(hex.substr(1, 1), 16),
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g: parseInt(hex.substr(2, 1), 16),
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b: parseInt(hex.substr(3, 1), 16),
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}
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}
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return {
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r: parseInt(hex.substr(1, 2), 16),
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g: parseInt(hex.substr(3, 2), 16),
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b: parseInt(hex.substr(5, 2), 16),
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}
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}
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public static setDefaults(options, defaults) {
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for (let key in defaults) {
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if (!(key in options)) options[key] = defaults[key];
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}
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return options;
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}
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}
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