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feat(dictionary): Japanese cut into words and looked up on the device

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Once the person agrees, the device holds MeCab's IPADIC and the
instance's JMdict and cuts lines as Jisho.org does, so their text never
leaves it (ADR 0012). MeCab comes through mecab_for_dart, whose build
hook compiles it; its tokens are grouped by Ve's rules, written anew in
Dart, with に kept a word of its own. Each word is found as it stands or
as a form of a word, else by its dictionary form, else as the longest
words it holds from token to token; longer words over token boundaries
are offered as before.

The curator packs Ubuntu's compiled IPADIC beside the dictionary files
(curate ipadic, and every update run). The server exports its JMdict
from its tables, so the device finds the same keys and keeps the same
versions, and serves both at /device-dictionaries/, named in
dictionary.deviceFiles('ja') with their hashes; Caddy forwards the path.

The app checks each file against its hash, unpacks IPADIC, builds a
SQLite database from the export on an isolate, and asks the instance
for newer files every 30 days, downloading only what changed. The Watch
screen offers the download once per device with its size (34 MB, some
150 MB once set up); Settings downloads and removes them. Without them,
or should cutting on the device fail, lines go to the instance as
before. MeCab's, IPADIC's and Ve's licences join the licence list.

Every build now needs a C++ compiler; mecab_for_dart holds code_assets
at 1.x.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-10-15 21:55:00 +02:00
commit 1d2011a676
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64
1 changed files with 5487 additions and 245 deletions
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11
halkyon_learn_server/lib/server.dart
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@ -3,6 +3,7 @@ import 'dart:io';
import 'package:halkyon_learn_server/src/assistant/connector_routes.dart';
import 'package:halkyon_learn_server/src/auth/auth_config.dart';
import 'package:halkyon_learn_server/src/dictionary/device_dictionaries.dart';
import 'package:halkyon_learn_server/src/dictionary/dictionary_loader.dart';
import 'package:halkyon_learn_server/src/generated/serverpod.dart';
import 'package:halkyon_learn_server/src/instance/jellyfin_suggestion.dart';
@ -29,6 +30,8 @@ Future<void> run(List<String> args) async {
addConnectorRoutes(pod);
// Profile pages, `/@handle`, which profile links link back to (ADR 0011).
addProfilePageRoute(pod);
// What devices download to look Japanese up by themselves (ADR 0012).
addDeviceDictionaryRoute(pod);
// Start the server.
await pod.start();
@ -97,9 +100,11 @@ Future<void> run(List<String> args) async {
/// reported here, as an error in the background would end the server.
Future<void> _loadDictionaries(Serverpod pod) async {
try {
await pod.withSession(
(session) => loadDictionaries(session, dictionaryFolder()),
);
await pod.withSession((session) async {
await loadDictionaries(session, dictionaryFolder());
// What devices download, ready before the first asks (ADR 0012).
await DeviceDictionaries.of(pod).prepare(session);
});
} on Object catch (error) {
stderr.writeln('Loading the dictionaries failed: $error');
}