kanji-inspector/dist/src/DatabaseManager.js

A TypeScript library that provides Unihan data as type-safe constants for Kanji and CJK ideographs.

import fs from 'fs';
import path from 'path';
import sqlite3 from 'sqlite3';
import { fileURLToPath } from 'url';
import { dirname } from 'path';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
// データベースディレクトリのパス
const DB_DIR = path.join(__dirname, '..', 'db');
// データベース接続を管理するクラス
export class DatabaseManager {
    static instance;
    connections = new Map();
    constructor() { }
    static getInstance() {
        if (!DatabaseManager.instance) {
            DatabaseManager.instance = new DatabaseManager();
        }
        return DatabaseManager.instance;
    }
    // データベース接続を取得
    getConnection(tableName) {
        if (!this.connections.has(tableName)) {
            const dbPath = path.join(DB_DIR, `${tableName}.db`);
            if (!fs.existsSync(dbPath)) {
                throw new Error(`データベースファイルが見つかりません: ${dbPath}`);
            }
            const db = new sqlite3.Database(dbPath);
            this.connections.set(tableName, db);
        }
        return this.connections.get(tableName);
    }
    // 特定のテーブルの接続を閉じる
    closeConnection(tableName) {
        const db = this.connections.get(tableName);
        if (db) {
            db.close();
            this.connections.delete(tableName);
        }
    }
    // すべての接続を閉じる
    closeAll() {
        for (const db of this.connections.values()) {
            db.close();
        }
        this.connections.clear();
    }
}