113 lines
4.5 KiB
TypeScript
113 lines
4.5 KiB
TypeScript
/*
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* Vencord, a modification for Discord's desktop app
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* Copyright (c) 2022 Vendicated and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import { runtimeHashMessageKey, runtimeHashMessageKeyLegacy } from "./intlHash";
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import { Patch, PatchReplacement, ReplaceFn } from "./types";
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// TODO: remove legacy hashing function once Discord ships new one everywhere for a while
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// @ts-expect-error "RegExp.escape" is very new and not yet in DOM types
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const escapeRegex = RegExp.escape || ((s: string) => s.replace(/[.*+?^${}()|[\]\\]/g, "\\$&"));
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export function getReplacement(isString: boolean, hashed: string) {
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const hasSpecialChars = !Number.isNaN(Number(hashed[0])) || hashed.includes("+") || hashed.includes("/");
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if (hasSpecialChars) {
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return isString
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? `["${hashed}"]`
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: String.raw`(?:\["${hashed}"\])`.replaceAll("+", "\\+");
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}
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return isString ? `.${hashed}` : String.raw`(?:\.${hashed})`;
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}
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function getCompatReplacement(key: string) {
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const hashed = getReplacement(false, runtimeHashMessageKey(key));
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const legacyHashed = getReplacement(false, runtimeHashMessageKeyLegacy(key));
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return String.raw`(?:${hashed}|${legacyHashed})`;
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}
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function canonicalizeMatchCompatString(str: string) {
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let result = "";
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let lastIndex = 0;
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const re = /#{intl::([\w$+/]*)(?:::(\w+))?}/g;
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for (const match of str.matchAll(re)) {
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result += escapeRegex(str.slice(lastIndex, match.index));
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result += match[2] === "raw" ? getReplacement(false, match[1]) : getCompatReplacement(match[1]);
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lastIndex = (match.index ?? 0) + match[0].length;
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}
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result += escapeRegex(str.slice(lastIndex));
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return new RegExp(result);
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}
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export function canonicalizeMatch<T extends RegExp | string>(match: T): T extends RegExp ? RegExp : string | RegExp {
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if (typeof match === "string") {
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return canonicalizeMatchCompatString(match) as any;
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}
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let partialCanon = typeof match === "string" ? match : match.source;
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partialCanon = partialCanon.replaceAll(/#{intl::([\w$+/]*)(?:::(\w+))?}/g, (_, key, modifier) => {
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if (modifier === "raw") return getReplacement(false, key);
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return getCompatReplacement(key);
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});
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if (typeof match === "string") {
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return partialCanon as any;
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}
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const canonSource = partialCanon.replaceAll("\\i", String.raw`(?:[A-Za-z_$][\w$]*)`);
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const canonRegex = new RegExp(canonSource, match.flags);
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canonRegex.toString = match.toString.bind(match);
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return canonRegex as any;
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}
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export function canonicalizeReplace<T extends string | ReplaceFn>(replace: T, pluginPath: string): T {
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if (typeof replace !== "function")
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return replace.replaceAll("$self", pluginPath) as T;
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return ((...args) => replace(...args).replaceAll("$self", pluginPath)) as T;
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}
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export function canonicalizeDescriptor<T>(descriptor: TypedPropertyDescriptor<T>, canonicalize: (value: T) => T) {
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if (descriptor.get) {
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const original = descriptor.get;
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descriptor.get = function () {
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return canonicalize(original.call(this));
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};
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} else if (descriptor.value) {
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descriptor.value = canonicalize(descriptor.value);
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}
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return descriptor;
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}
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export function canonicalizeReplacement(replacement: Pick<PatchReplacement, "match" | "replace">, pluginPath: string) {
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const descriptors = Object.getOwnPropertyDescriptors(replacement);
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descriptors.match = canonicalizeDescriptor(descriptors.match, canonicalizeMatch);
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descriptors.replace = canonicalizeDescriptor(
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descriptors.replace,
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replace => canonicalizeReplace(replace, pluginPath),
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);
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Object.defineProperties(replacement, descriptors);
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}
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export function canonicalizeFind(patch: Patch) {
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const descriptors = Object.getOwnPropertyDescriptors(patch);
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descriptors.find = canonicalizeDescriptor(descriptors.find, canonicalizeMatch);
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Object.defineProperties(patch, descriptors);
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}
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