allow js to request specific i18n modules

Brings the payload on the congrats page with a non-English language
down from about 150k to 15k

pylib/anki/collection.py

@@ -1041,8 +1041,8 @@ table.review-log {{ {revlog_style} }}
     def set_wants_abort(self) -> None:
         self._backend.set_wants_abort()
 
-    def i18n_resources(self) -> bytes:
-        return self._backend.i18n_resources()
+    def i18n_resources(self, modules: Sequence[str]) -> bytes:
+        return self._backend.i18n_resources(modules=modules)
 
     def abort_media_sync(self) -> None:
         self._backend.abort_media_sync()

qt/aqt/mediasrv.py

@@ -269,12 +269,17 @@ def congrats_info() -> bytes:
     return aqt.mw.col.congrats_info()
 
 
+def i18n_resources() -> bytes:
+    args = from_json_bytes(request.data)
+    return aqt.mw.col.i18n_resources(modules=args["modules"])
+
+
 post_handlers = {
     "graphData": graph_data,
     "graphPreferences": graph_preferences,
     "setGraphPreferences": set_graph_preferences,
     # pylint: disable=unnecessary-lambda
-    "i18nResources": lambda: aqt.mw.col.i18n_resources(),
+    "i18nResources": i18n_resources,
     "congratsInfo": congrats_info,
 }
 

rslib/backend.proto

@@ -263,7 +263,7 @@ service MediaService {
 service I18nService {
   rpc TranslateString(TranslateStringIn) returns (String);
   rpc FormatTimespan(FormatTimespanIn) returns (String);
-  rpc I18nResources(Empty) returns (Json);
+  rpc I18nResources(I18nResourcesIn) returns (Json);
 }
 
 service CollectionService {
@@ -773,6 +773,10 @@ message FormatTimespanIn {
   Context context = 2;
 }
 
+message I18nResourcesIn {
+  repeated string modules = 1;
+}
+
 message StudiedTodayMessageIn {
   uint32 cards = 1;
   double seconds = 2;

rslib/i18n/src/lib.rs

@@ -183,7 +183,6 @@ impl I18n {
     pub fn new<S: AsRef<str>>(locale_codes: &[S]) -> Self {
         let mut input_langs = vec![];
         let mut bundles = Vec::with_capacity(locale_codes.len() + 1);
-        let mut resource_text = vec![];
 
         for code in locale_codes {
             let code = code.as_ref();
@@ -210,7 +209,6 @@ impl I18n {
                 }
             }) {
                 if let Some(bundle) = get_bundle_with_extra(&text, Some(lang.clone())) {
-                    resource_text.push(text);
                     bundles.push(bundle);
                     output_langs.push(lang);
                 } else {
@@ -223,7 +221,6 @@ impl I18n {
         let template_lang = "en-US".parse().unwrap();
         let template_text = ftl_localized_text(&template_lang).unwrap();
         let template_bundle = get_bundle_with_extra(&template_text, None).unwrap();
-        resource_text.push(template_text);
         bundles.push(template_bundle);
         output_langs.push(template_lang);
 
@@ -238,7 +235,6 @@ impl I18n {
             inner: Arc::new(Mutex::new(I18nInner {
                 bundles,
                 langs: output_langs,
-                resource_text,
             })),
         }
     }
@@ -288,15 +284,35 @@ impl I18n {
     }
 
     /// Return text from configured locales for use with the JS Fluent implementation.
-    pub fn resources_for_js(&self) -> ResourcesForJavascript {
+    pub fn resources_for_js(&self, desired_modules: &[String]) -> ResourcesForJavascript {
         let inner = self.inner.lock().unwrap();
+        let resources = get_modules(&inner.langs, desired_modules);
         ResourcesForJavascript {
             langs: inner.langs.iter().map(ToString::to_string).collect(),
-            resources: inner.resource_text.clone(),
+            resources,
         }
     }
 }
 
+fn get_modules(langs: &[LanguageIdentifier], desired_modules: &[String]) -> Vec<String> {
+    langs
+        .iter()
+        .cloned()
+        .map(|lang| {
+            let mut buf = String::new();
+            let lang_name = remapped_lang_name(&lang);
+            if let Some(strings) = STRINGS.get(lang_name) {
+                for module_name in desired_modules {
+                    if let Some(text) = strings.get(module_name.as_str()) {
+                        buf.push_str(text);
+                    }
+                }
+            }
+            buf
+        })
+        .collect()
+}
+
 /// This temporarily behaves like the older code; in the future we could either
 /// access each &str separately, or load them on demand.
 fn ftl_localized_text(lang: &LanguageIdentifier) -> Option<String> {
@@ -317,9 +333,6 @@ struct I18nInner {
     // last element
     bundles: Vec<FluentBundle<FluentResource>>,
     langs: Vec<LanguageIdentifier>,
-    // fixme: this is a relic from the old implementation, and we could gather
-    // it only when needed in the future
-    resource_text: Vec<String>,
 }
 
 // Simple number formatting implementation

rslib/src/backend/i18n.rs

@@ -32,8 +32,8 @@ impl I18nService for Backend {
         .into())
     }
 
-    fn i18n_resources(&self, _input: pb::Empty) -> Result<pb::Json> {
-        serde_json::to_vec(&self.i18n.resources_for_js())
+    fn i18n_resources(&self, input: pb::I18nResourcesIn) -> Result<pb::Json> {
+        serde_json::to_vec(&self.i18n.resources_for_js(&input.modules))
             .map(Into::into)
             .map_err(Into::into)
     }

ts/congrats/index.ts

@@ -2,14 +2,14 @@
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import { getCongratsInfo } from "./lib";
-import { setupI18n } from "anki/i18n";
+import { setupI18n, ModuleName } from "anki/i18n";
 import { checkNightMode } from "anki/nightmode";
 
 import CongratsPage from "./CongratsPage.svelte";
 
 export async function congrats(target: HTMLDivElement): Promise<void> {
     checkNightMode();
-    await setupI18n();
+    await setupI18n({ modules: [ModuleName.SCHEDULING] });
     const info = await getCongratsInfo();
     new CongratsPage({
         target,

ts/graphs/index.ts

@@ -3,7 +3,7 @@
 
 import type { SvelteComponent } from "svelte/internal";
 
-import { setupI18n } from "anki/i18n";
+import { setupI18n, ModuleName } from "anki/i18n";
 import { checkNightMode } from "anki/nightmode";
 
 import GraphsPage from "./GraphsPage.svelte";
@@ -33,7 +33,7 @@ export function graphs(
 ): void {
     const nightMode = checkNightMode();
 
-    setupI18n().then(() => {
+    setupI18n({ modules: [ModuleName.STATISTICS, ModuleName.SCHEDULING] }).then(() => {
         new GraphsPage({
             target,
             props: {

ts/lib/genfluent.py

@@ -91,11 +91,20 @@ def typescript_arg_name(arg: Variable) -> str:
     else:
         return name
 
+def module_names() -> str:
+    buf = "export enum ModuleName {\n"
+    for module in modules:
+        name = module["name"]
+        upper = name.upper()
+        buf += f'    {upper} = "{name}",\n'
+    buf += "}\n"
+    return buf
+
 
 out = ""
 
 out += methods()
-
+out += module_names()
 
 open(outfile, "wb").write(
     (

ts/lib/i18n_helpers.ts

@@ -70,8 +70,13 @@ export class I18n {
 // global singleton
 export const i18n = new I18n();
 
-export async function setupI18n(): Promise<void> {
-    const resp = await fetch("/_anki/i18nResources", { method: "POST" });
+import type { ModuleName } from "./i18n";
+
+export async function setupI18n(args: { modules: ModuleName[] }): Promise<void> {
+    const resp = await fetch("/_anki/i18nResources", {
+        method: "POST",
+        body: JSON.stringify(args),
+    });
     if (!resp.ok) {
         throw Error(`unexpected reply: ${resp.statusText}`);
     }