waveterm/frontend/util/util.ts

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// Copyright 2024, Command Line Inc.
// SPDX-License-Identifier: Apache-2.0s
import base64 from "base64-js";
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import clsx from "clsx";
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function isBlank(str: string): boolean {
return str == null || str == "";
}
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function base64ToString(b64: string): string {
if (b64 == null) {
return null;
}
if (b64 == "") {
return "";
}
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const stringBytes = base64.toByteArray(b64);
return new TextDecoder().decode(stringBytes);
}
function stringToBase64(input: string): string {
const stringBytes = new TextEncoder().encode(input);
return base64.fromByteArray(stringBytes);
}
function base64ToArray(b64: string): Uint8Array {
const rawStr = atob(b64);
const rtnArr = new Uint8Array(new ArrayBuffer(rawStr.length));
for (let i = 0; i < rawStr.length; i++) {
rtnArr[i] = rawStr.charCodeAt(i);
}
return rtnArr;
}
// works for json-like objects (arrays, objects, strings, numbers, booleans)
function jsonDeepEqual(v1: any, v2: any): boolean {
if (v1 === v2) {
return true;
}
if (typeof v1 !== typeof v2) {
return false;
}
if ((v1 == null && v2 != null) || (v1 != null && v2 == null)) {
return false;
}
if (typeof v1 === "object") {
if (Array.isArray(v1) && Array.isArray(v2)) {
if (v1.length !== v2.length) {
return false;
}
for (let i = 0; i < v1.length; i++) {
if (!jsonDeepEqual(v1[i], v2[i])) {
return false;
}
}
return true;
} else {
const keys1 = Object.keys(v1);
const keys2 = Object.keys(v2);
if (keys1.length !== keys2.length) {
return false;
}
for (let key of keys1) {
if (!jsonDeepEqual(v1[key], v2[key])) {
return false;
}
}
return true;
}
}
return false;
}
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function makeIconClass(icon: string, fw: boolean): string {
if (icon == null) {
return null;
}
if (icon.match(/^(solid@)?[a-z0-9-]+$/)) {
// strip off "solid@" prefix if it exists
icon = icon.replace(/^solid@/, "");
return clsx(`fa fa-sharp fa-solid fa-${icon}`, fw ? "fa-fw" : null);
}
if (icon.match(/^regular@[a-z0-9-]+$/)) {
// strip off the "regular@" prefix if it exists
icon = icon.replace(/^regular@/, "");
return clsx(`fa fa-sharp fa-regular fa-${icon}`, fw ? "fa-fw" : null);
}
return null;
}
/**
* A wrapper function for running a promise and catching any errors
* @param f The promise to run
*/
function fireAndForget(f: () => Promise<any>) {
f().catch((e) => {
console.log("fireAndForget error", e);
});
}
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const promiseWeakMap = new WeakMap<Promise<any>, ResolvedValue<any>>();
type ResolvedValue<T> = {
pending: boolean;
error: any;
value: T;
};
// returns the value, pending state, and error of a promise
function getPromiseState<T>(promise: Promise<T>): [T, boolean, any] {
if (promise == null) {
return [null, false, null];
}
if (promiseWeakMap.has(promise)) {
const value = promiseWeakMap.get(promise);
return [value.value, value.pending, value.error];
}
const value: ResolvedValue<T> = {
pending: true,
error: null,
value: null,
};
promise.then(
(result) => {
value.pending = false;
value.error = null;
value.value = result;
},
(error) => {
value.pending = false;
value.error = error;
}
);
promiseWeakMap.set(promise, value);
return [value.value, value.pending, value.error];
}
// returns the value of a promise, or a default value if the promise is still pending (or had an error)
function getPromiseValue<T>(promise: Promise<T>, def: T): T {
const [value, pending, error] = getPromiseState(promise);
if (pending || error) {
return def;
}
return value;
}
function jotaiLoadableValue<T>(value: Loadable<T>, def: T): T {
if (value.state === "hasData") {
return value.data;
}
return def;
}
export {
base64ToArray,
base64ToString,
fireAndForget,
getPromiseState,
getPromiseValue,
isBlank,
jotaiLoadableValue,
jsonDeepEqual,
makeIconClass,
stringToBase64,
};