feat(core): add Electron runtime, services, and app composition

src/core/services/yomitan-extension-loader.ts

@@ -0,0 +1,109 @@
+import { BrowserWindow, Extension, session } from 'electron';
+import * as fs from 'fs';
+import * as path from 'path';
+import { createLogger } from '../../logger';
+
+const logger = createLogger('main:yomitan-extension-loader');
+
+export interface YomitanExtensionLoaderDeps {
+  userDataPath: string;
+  getYomitanParserWindow: () => BrowserWindow | null;
+  setYomitanParserWindow: (window: BrowserWindow | null) => void;
+  setYomitanParserReadyPromise: (promise: Promise<void> | null) => void;
+  setYomitanParserInitPromise: (promise: Promise<boolean> | null) => void;
+  setYomitanExtension: (extension: Extension | null) => void;
+}
+
+function ensureExtensionCopy(sourceDir: string, userDataPath: string): string {
+  if (process.platform === 'win32') {
+    return sourceDir;
+  }
+
+  const extensionsRoot = path.join(userDataPath, 'extensions');
+  const targetDir = path.join(extensionsRoot, 'yomitan');
+
+  const sourceManifest = path.join(sourceDir, 'manifest.json');
+  const targetManifest = path.join(targetDir, 'manifest.json');
+
+  let shouldCopy = !fs.existsSync(targetDir);
+  if (!shouldCopy && fs.existsSync(sourceManifest) && fs.existsSync(targetManifest)) {
+    try {
+      const sourceVersion = (
+        JSON.parse(fs.readFileSync(sourceManifest, 'utf-8')) as {
+          version: string;
+        }
+      ).version;
+      const targetVersion = (
+        JSON.parse(fs.readFileSync(targetManifest, 'utf-8')) as {
+          version: string;
+        }
+      ).version;
+      shouldCopy = sourceVersion !== targetVersion;
+    } catch {
+      shouldCopy = true;
+    }
+  }
+
+  if (shouldCopy) {
+    fs.mkdirSync(extensionsRoot, { recursive: true });
+    fs.rmSync(targetDir, { recursive: true, force: true });
+    fs.cpSync(sourceDir, targetDir, { recursive: true });
+    logger.info(`Copied yomitan extension to ${targetDir}`);
+  }
+
+  return targetDir;
+}
+
+export async function loadYomitanExtension(
+  deps: YomitanExtensionLoaderDeps,
+): Promise<Extension | null> {
+  const searchPaths = [
+    path.join(__dirname, '..', '..', 'vendor', 'yomitan'),
+    path.join(__dirname, '..', '..', '..', 'vendor', 'yomitan'),
+    path.join(process.resourcesPath, 'yomitan'),
+    '/usr/share/SubMiner/yomitan',
+    path.join(deps.userDataPath, 'yomitan'),
+  ];
+
+  let extPath: string | null = null;
+  for (const p of searchPaths) {
+    if (fs.existsSync(p)) {
+      extPath = p;
+      break;
+    }
+  }
+
+  if (!extPath) {
+    logger.error('Yomitan extension not found in any search path');
+    logger.error('Install Yomitan to one of:', searchPaths);
+    return null;
+  }
+
+  extPath = ensureExtensionCopy(extPath, deps.userDataPath);
+
+  const parserWindow = deps.getYomitanParserWindow();
+  if (parserWindow && !parserWindow.isDestroyed()) {
+    parserWindow.destroy();
+  }
+  deps.setYomitanParserWindow(null);
+  deps.setYomitanParserReadyPromise(null);
+  deps.setYomitanParserInitPromise(null);
+
+  try {
+    const extensions = session.defaultSession.extensions;
+    const extension = extensions
+      ? await extensions.loadExtension(extPath, {
+          allowFileAccess: true,
+        })
+      : await session.defaultSession.loadExtension(extPath, {
+          allowFileAccess: true,
+        });
+    deps.setYomitanExtension(extension);
+    return extension;
+  } catch (err) {
+    logger.error('Failed to load Yomitan extension:', (err as Error).message);
+    logger.error('Full error:', err);
+    deps.setYomitanExtension(null);
+    return null;
+  }
+}