feat: translation

.vscode/extensions.json

@@ -6,6 +6,7 @@
         "ExodiusStudios.comment-anchors",
         "formulahendry.auto-rename-tag",
         "GregorBiswanger.json2ts",
-        "stylelint.vscode-stylelint"
+        "stylelint.vscode-stylelint",
+        "macabeus.vscode-fluent"
     ]
 }

package.json

@@ -31,6 +31,9 @@
         "watch": "node --require=./scripts/suppressExperimentalWarnings.js scripts/build/build.mjs --watch"
     },
     "dependencies": {
+        "@fluent/bundle": "^0.18.0",
+        "@fluent/langneg": "^0.7.0",
+        "@fluent/sequence": "^0.8.0",
         "@sapphi-red/web-noise-suppressor": "0.3.3",
         "@vap/core": "0.0.12",
         "@vap/shiki": "0.10.5",

pnpm-lock.yaml

@@ -1,5 +1,9 @@
 lockfileVersion: '6.0'
 
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
 patchedDependencies:
   eslint-plugin-path-alias@1.0.0:
     hash: m6sma4g6bh67km3q6igf6uxaja
@@ -9,6 +13,15 @@ patchedDependencies:
     path: patches/eslint@8.46.0.patch
 
 dependencies:
+  '@fluent/bundle':
+    specifier: ^0.18.0
+    version: 0.18.0
+  '@fluent/langneg':
+    specifier: ^0.7.0
+    version: 0.7.0
+  '@fluent/sequence':
+    specifier: ^0.8.0
+    version: 0.8.0(@fluent/bundle@0.18.0)
   '@sapphi-red/web-noise-suppressor':
     specifier: 0.3.3
     version: 0.3.3
@@ -467,6 +480,25 @@ packages:
     engines: {node: ^12.22.0 || ^14.17.0 || >=16.0.0}
     dev: true
 
+  /@fluent/bundle@0.18.0:
+    resolution: {integrity: sha512-8Wfwu9q8F9g2FNnv82g6Ch/E1AW1wwljsUOolH5NEtdJdv0sZTuWvfCM7c3teB9dzNaJA8rn4khpidpozHWYEA==}
+    engines: {node: '>=14.0.0', npm: '>=7.0.0'}
+    dev: false
+
+  /@fluent/langneg@0.7.0:
+    resolution: {integrity: sha512-StAM0vgsD1QK+nFikaKs9Rxe3JGNipiXrpmemNGwM4gWERBXPe9gjzsBoKjgBgq1Vyiy+xy/C652QIWY+MPyYw==}
+    engines: {node: '>=14.0.0', npm: '>=7.0.0'}
+    dev: false
+
+  /@fluent/sequence@0.8.0(@fluent/bundle@0.18.0):
+    resolution: {integrity: sha512-eV5QlEEVV/wR3AFQLXO67x4yPRPQXyqke0c8yucyMSeW36B3ecZyVFlY1UprzrfFV8iPJB4TAehDy/dLGbvQ1Q==}
+    engines: {node: '>=14.0.0', npm: '>=7.0.0'}
+    peerDependencies:
+      '@fluent/bundle': '>= 0.13.0'
+    dependencies:
+      '@fluent/bundle': 0.18.0
+    dev: false
+
   /@humanwhocodes/config-array@0.11.10:
     resolution: {integrity: sha512-KVVjQmNUepDVGXNuoRRdmmEjruj0KfiGSbS8LVc12LMsWDQzRXJ0qdhN8L8uUigKpfEHRhlaQFY0ib1tnUbNeQ==}
     engines: {node: '>=10.10.0'}
@@ -3464,7 +3496,3 @@ packages:
     name: gifenc
     version: 1.0.3
     dev: false
-
-settings:
-  autoInstallPeers: true
-  excludeLinksFromLockfile: false

scripts/build/common.mjs

@@ -205,6 +205,42 @@ export const stylePlugin = {
     }
 };
 
+/**
+ * @type {import("esbuild").Plugin}
+ */
+export const translationPlugin = {
+    name: "translation-plugin",
+    setup: ({ onResolve, onLoad }) => {
+        const filter = /^~translations$/;
+
+        onResolve({ filter }, ({ path }) => ({
+            namespace: "translations", path
+        }));
+        onLoad({ filter, namespace: "translations" }, async () => {
+            const translations = {};
+            const locales = await readdir("./translations");
+
+            for (const locale of locales) {
+                const translationBundles = await readdir(`./translations/${locale}`);
+
+                for (const bundle of translationBundles) {
+                    const name = bundle.replace(/\.ftl$/, "");
+
+                    // we map this in reverse order to the file structure as it's more logical in the code to do it this
+                    // way (translations are retrieved by bundle name, not locale, but on the fs it makes more sense to
+                    // sort them by locale)
+                    translations[name] ??= {};
+                    translations[name][locale] = await readFile(`./translations/${locale}/${bundle}`, "utf-8");
+                }
+            }
+
+            return {
+                contents: `export default ${JSON.stringify(translations)}`,
+            };
+        });
+    }
+};
+
 /**
  * @type {import("esbuild").BuildOptions}
  */
@@ -216,8 +252,8 @@ export const commonOpts = {
     sourcemap: watch ? "inline" : "",
     legalComments: "linked",
     banner,
-    plugins: [fileIncludePlugin, gitHashPlugin, gitRemotePlugin, stylePlugin],
+    plugins: [fileIncludePlugin, gitHashPlugin, gitRemotePlugin, stylePlugin, translationPlugin],
-    external: ["~plugins", "~git-hash", "~git-remote", "/assets/*"],
+    external: ["~plugins", "~git-hash", "~git-remote", "~translations", "/assets/*"],
     inject: ["./scripts/build/inject/react.mjs"],
     jsxFactory: "VencordCreateElement",
     jsxFragment: "VencordFragment",

src/Vencord.ts

@@ -145,4 +145,3 @@ document.addEventListener("DOMContentLoaded", () => {
         }));
     }
 }, { once: true });
-

src/modules.d.ts

@@ -38,6 +38,11 @@ declare module "~git-remote" {
     export default remote;
 }
 
+declare module "~translations" {
+    const translations: Record<string, Record<string, string>>;
+    export default translations;
+}
+
 declare module "~fileContent/*" {
     const content: string;
     export default content;

src/utils/translation.ts

@@ -0,0 +1,94 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { FluentBundle, FluentResource } from "@fluent/bundle";
+import { negotiateLanguages } from "@fluent/langneg";
+import { mapBundleSync } from "@fluent/sequence";
+import { FluxDispatcher, i18n } from "@webpack/common";
+
+import translations from "~translations";
+
+import { Logger } from "./Logger";
+
+// same color as pontoon's logo
+const logger = new Logger("Translations", "#7bc876");
+
+/**
+ * Gets a function that translates strings.
+ * @param context The context to use for translation (e.g., `vencord`).
+ * @returns A function that allows translation.
+ */
+export function getTranslations(context: string) {
+    if (!translations[context]) throw new Error(`No translations for ${context}`);
+
+    let localeCache: FluentBundle[] = [];
+    let messageCache: Record<string, FluentBundle> = {};
+
+    let lastLocale = i18n.getLocale();
+    FluxDispatcher.subscribe("USER_SETTINGS_PROTO_UPDATE", ({ settings }) => {
+        if (settings.proto.localization.locale.value !== lastLocale) {
+            // locale was updated, clear our caches
+
+            lastLocale = settings.proto.localization.locale.value;
+
+            localeCache = [];
+            messageCache = {};
+        }
+    });
+
+    /**
+     * Translates a key. Soft-fails and returns a fallback error string if the key could not be loaded.
+     * @param key The key to translate.
+     * @param variables The variables to interpolate into the resultant string.
+     * @returns A translated string.
+     */
+    return function t(key: string, variables?: Record<string, any>): string {
+        // adding the caching here speeds up retrieving translations for this key later
+        if (messageCache[key]) {
+            const bundle = messageCache[key];
+            return bundle.formatPattern(bundle.getMessage(key)!.value!, variables);
+        }
+
+        // we've never loaded this context's translations
+        if (localeCache.length === 0) {
+            const availableLocales = Object.keys(translations[context]);
+
+            const locale = i18n.getLocale();
+
+            const supportedLocales = negotiateLanguages([locale], availableLocales, { defaultLocale: "en-US" });
+
+            for (const locale of supportedLocales) {
+                const glossaryResource = new FluentResource(translations.glossary[locale]);
+                const resource = new FluentResource(translations[context][locale]);
+
+                const fluentBundle = new FluentBundle(locale);
+
+                // the glossary is always loaded first
+                fluentBundle.addResource(glossaryResource);
+
+                const errors = fluentBundle.addResource(resource);
+
+                if (errors.length) {
+                    logger.warn("Translations for", context, "in locale", locale, "loaded with errors:", errors);
+                }
+
+                localeCache.push(fluentBundle);
+            }
+        }
+
+        const bundle = mapBundleSync(localeCache, key);
+
+        if (!bundle) return "Could not get translation for " + key;
+
+        const message = bundle.getMessage(key);
+        if (message?.value) {
+            messageCache[key] = bundle;
+            return bundle.formatPattern(message.value, variables);
+        }
+
+        return "Could not get translation for " + key;
+    };
+}

translations/en-US/glossary.ftl

@@ -0,0 +1,21 @@
+# The glossary contains commonly used or agreed translations for words. This is used to cut down on the amount of
+# repeated strings shared between Vencord and plugins, and makes reusing them easy.
+#
+# Since this is a glossary for other translations and are loaded with every context, they are made into terms so that
+# they cannot be used by developers directly, but rather need to be interpolated into messages. For example:
+#
+#    vencord-appreciation = I love {-vencord}!
+#
+# is the correct way of using the `-vencord` term since `-vencord` is not accessible from the translation function.
+#
+# This glossary is the reference glossary. Since languages are complex, some glossaries may have a different set of
+# facets or terms to make it more compatible with that language (not one size fits all after all!) and the appropriate
+# translation files will need to account for that. Every language, however, should have at least a minimal glossary.
+#
+# For translators, if a glossary contains the word in the context you need it in, use the glossary. If it doesn't due to
+# a grammatical issue, it is preferred to extend the glossary with a new facet for the context you need to use it in for
+# future use in other translations. If you see a commonly repeated word or phrase that might benefit from being in the
+# glossary, please open an issue on GitHub to discuss it since we need to look into moving it into the glossary for
+# other languages as well.
+
+-vencord = Vencord

translations/en-US/vencord.ftl

@@ -0,0 +1 @@
+hello = Hello my beautiful {$worldName}! And yes this works because {-vencord} is awesome!