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internal/database/database.go

@@ -0,0 +1,90 @@
+package database
+
+import (
+	"database/sql"
+	"fmt"
+
+	_ "github.com/mattn/go-sqlite3"
+	"go.uber.org/zap"
+)
+
+// DB 数据库连接
+type DB struct {
+	*sql.DB
+	logger *zap.Logger
+}
+
+// NewDB 创建数据库连接
+func NewDB(dbPath string, logger *zap.Logger) (*DB, error) {
+	db, err := sql.Open("sqlite3", dbPath+"?_journal_mode=WAL&_foreign_keys=1")
+	if err != nil {
+		return nil, fmt.Errorf("打开数据库失败: %w", err)
+	}
+
+	if err := db.Ping(); err != nil {
+		return nil, fmt.Errorf("连接数据库失败: %w", err)
+	}
+
+	database := &DB{
+		DB:     db,
+		logger: logger,
+	}
+
+	// 初始化表
+	if err := database.initTables(); err != nil {
+		return nil, fmt.Errorf("初始化表失败: %w", err)
+	}
+
+	return database, nil
+}
+
+// initTables 初始化数据库表
+func (db *DB) initTables() error {
+	// 创建对话表
+	createConversationsTable := `
+	CREATE TABLE IF NOT EXISTS conversations (
+		id TEXT PRIMARY KEY,
+		title TEXT NOT NULL,
+		created_at DATETIME NOT NULL,
+		updated_at DATETIME NOT NULL
+	);`
+
+	// 创建消息表
+	createMessagesTable := `
+	CREATE TABLE IF NOT EXISTS messages (
+		id TEXT PRIMARY KEY,
+		conversation_id TEXT NOT NULL,
+		role TEXT NOT NULL,
+		content TEXT NOT NULL,
+		mcp_execution_ids TEXT,
+		created_at DATETIME NOT NULL,
+		FOREIGN KEY (conversation_id) REFERENCES conversations(id) ON DELETE CASCADE
+	);`
+
+	// 创建索引
+	createIndexes := `
+	CREATE INDEX IF NOT EXISTS idx_messages_conversation_id ON messages(conversation_id);
+	CREATE INDEX IF NOT EXISTS idx_conversations_updated_at ON conversations(updated_at);
+	`
+
+	if _, err := db.Exec(createConversationsTable); err != nil {
+		return fmt.Errorf("创建conversations表失败: %w", err)
+	}
+
+	if _, err := db.Exec(createMessagesTable); err != nil {
+		return fmt.Errorf("创建messages表失败: %w", err)
+	}
+
+	if _, err := db.Exec(createIndexes); err != nil {
+		return fmt.Errorf("创建索引失败: %w", err)
+	}
+
+	db.logger.Info("数据库表初始化完成")
+	return nil
+}
+
+// Close 关闭数据库连接
+func (db *DB) Close() error {
+	return db.DB.Close()
+}
+