408 lines
10 KiB
Go
408 lines
10 KiB
Go
package services
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"sync"
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"time"
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"voidraft/internal/models"
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"github.com/wailsapp/wails/v3/pkg/application"
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"github.com/wailsapp/wails/v3/pkg/services/log"
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_ "modernc.org/sqlite" // SQLite driver
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)
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// SQL constants for database operations
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const (
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dbName = "voidraft.db"
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// Database schema (simplified single table with auto-increment ID)
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sqlCreateDocumentsTable = `
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CREATE TABLE IF NOT EXISTS documents (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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title TEXT NOT NULL,
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content TEXT DEFAULT '∞∞∞text-a',
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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is_deleted INTEGER DEFAULT 0
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)`
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// Performance optimization indexes
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sqlCreateIndexUpdatedAt = `CREATE INDEX IF NOT EXISTS idx_documents_updated_at ON documents(updated_at DESC)`
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sqlCreateIndexTitle = `CREATE INDEX IF NOT EXISTS idx_documents_title ON documents(title)`
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sqlCreateIndexIsDeleted = `CREATE INDEX IF NOT EXISTS idx_documents_is_deleted ON documents(is_deleted)`
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// SQLite performance optimization settings
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sqlOptimizationSettings = `
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PRAGMA journal_mode = WAL;
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PRAGMA synchronous = NORMAL;
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PRAGMA cache_size = -64000;
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PRAGMA temp_store = MEMORY;
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PRAGMA foreign_keys = ON;`
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// Document operations
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sqlGetDocumentByID = `
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SELECT id, title, content, created_at, updated_at, is_deleted
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FROM documents
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WHERE id = ?`
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sqlInsertDocument = `
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INSERT INTO documents (title, content, created_at, updated_at, is_deleted)
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VALUES (?, ?, ?, ?, 0)`
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sqlUpdateDocumentContent = `
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UPDATE documents
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SET content = ?, updated_at = ?
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WHERE id = ?`
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sqlUpdateDocumentTitle = `
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UPDATE documents
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SET title = ?, updated_at = ?
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WHERE id = ?`
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sqlMarkDocumentAsDeleted = `
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UPDATE documents
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SET is_deleted = 1, updated_at = ?
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WHERE id = ?`
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sqlRestoreDocument = `
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UPDATE documents
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SET is_deleted = 0, updated_at = ?
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WHERE id = ?`
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sqlListAllDocumentsMeta = `
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SELECT id, title, created_at, updated_at
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FROM documents
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WHERE is_deleted = 0
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ORDER BY updated_at DESC`
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sqlListDeletedDocumentsMeta = `
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SELECT id, title, created_at, updated_at
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FROM documents
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WHERE is_deleted = 1
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ORDER BY updated_at DESC`
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sqlGetFirstDocumentID = `
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SELECT id FROM documents WHERE is_deleted = 0 ORDER BY id LIMIT 1`
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sqlCountDocuments = `SELECT COUNT(*) FROM documents WHERE is_deleted = 0`
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sqlDefaultDocumentID = 1 // 默认文档的ID
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)
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// DocumentService provides document management functionality
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type DocumentService struct {
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configService *ConfigService
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logger *log.LoggerService
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db *sql.DB
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mu sync.RWMutex
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ctx context.Context
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}
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// NewDocumentService creates a new document service
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func NewDocumentService(configService *ConfigService, logger *log.LoggerService) *DocumentService {
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if logger == nil {
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logger = log.New()
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}
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return &DocumentService{
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configService: configService,
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logger: logger,
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}
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}
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// OnStartup initializes the service when the application starts
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func (ds *DocumentService) OnStartup(ctx context.Context, _ application.ServiceOptions) error {
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ds.ctx = ctx
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return ds.initDatabase()
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}
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// initDatabase initializes the SQLite database
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func (ds *DocumentService) initDatabase() error {
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dbPath, err := ds.getDatabasePath()
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if err != nil {
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return fmt.Errorf("failed to get database path: %w", err)
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}
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// 确保数据库目录存在
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dbDir := filepath.Dir(dbPath)
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if err := os.MkdirAll(dbDir, 0755); err != nil {
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return fmt.Errorf("failed to create database directory: %w", err)
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}
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// 检查数据库文件是否存在，如果不存在则创建
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if _, err := os.Stat(dbPath); os.IsNotExist(err) {
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ds.logger.Info("Database file does not exist, creating empty file", "path", dbPath)
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// 创建空文件
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file, err := os.Create(dbPath)
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if err != nil {
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return fmt.Errorf("failed to create database file: %w", err)
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}
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file.Close()
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}
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db, err := sql.Open("sqlite", dbPath)
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if err != nil {
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return fmt.Errorf("failed to open database: %w", err)
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}
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ds.db = db
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// Apply optimization settings
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if _, err := db.Exec(sqlOptimizationSettings); err != nil {
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return fmt.Errorf("failed to apply optimization settings: %w", err)
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}
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// Create table
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if _, err := db.Exec(sqlCreateDocumentsTable); err != nil {
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return fmt.Errorf("failed to create table: %w", err)
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}
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// Create indexes
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if err := ds.createIndexes(); err != nil {
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return fmt.Errorf("failed to create indexes: %w", err)
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}
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// Ensure default document exists
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if err := ds.ensureDefaultDocument(); err != nil {
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return fmt.Errorf("failed to ensure default document: %w", err)
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}
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return nil
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}
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// getDatabasePath gets the database file path
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func (ds *DocumentService) getDatabasePath() (string, error) {
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config, err := ds.configService.GetConfig()
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if err != nil {
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return "", err
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}
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return filepath.Join(config.General.DataPath, dbName), nil
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}
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// createIndexes creates database indexes
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func (ds *DocumentService) createIndexes() error {
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indexes := []string{
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sqlCreateIndexUpdatedAt,
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sqlCreateIndexTitle,
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sqlCreateIndexIsDeleted,
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}
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for _, index := range indexes {
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if _, err := ds.db.Exec(index); err != nil {
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return err
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}
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}
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return nil
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}
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// ensureDefaultDocument ensures a default document exists
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func (ds *DocumentService) ensureDefaultDocument() error {
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// Check if any document exists
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var count int
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err := ds.db.QueryRow(sqlCountDocuments).Scan(&count)
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if err != nil {
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return err
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}
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// If no documents exist, create default document
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if count == 0 {
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defaultDoc := models.NewDefaultDocument()
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_, err := ds.CreateDocument(defaultDoc.Title)
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return err
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}
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return nil
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}
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// GetDocumentByID gets a document by ID
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func (ds *DocumentService) GetDocumentByID(id int64) (*models.Document, error) {
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ds.mu.RLock()
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defer ds.mu.RUnlock()
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var doc models.Document
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var isDeletedInt int
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row := ds.db.QueryRow(sqlGetDocumentByID, id)
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err := row.Scan(&doc.ID, &doc.Title, &doc.Content, &doc.CreatedAt, &doc.UpdatedAt, &isDeletedInt)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return nil, nil
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}
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return nil, fmt.Errorf("failed to get document by ID: %w", err)
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}
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doc.IsDeleted = isDeletedInt == 1
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return &doc, nil
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}
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// CreateDocument creates a new document and returns the created document with ID
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func (ds *DocumentService) CreateDocument(title string) (*models.Document, error) {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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// Create document with default content
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now := time.Now()
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doc := &models.Document{
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Title: title,
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Content: "∞∞∞text-a\n",
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CreatedAt: now,
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UpdatedAt: now,
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IsDeleted: false,
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}
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result, err := ds.db.Exec(sqlInsertDocument, doc.Title, doc.Content, doc.CreatedAt, doc.UpdatedAt)
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if err != nil {
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return nil, fmt.Errorf("failed to create document: %w", err)
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}
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// Get the auto-generated ID
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id, err := result.LastInsertId()
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if err != nil {
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return nil, fmt.Errorf("failed to get last insert ID: %w", err)
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}
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// Return the created document with ID
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doc.ID = id
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return doc, nil
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}
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// UpdateDocumentContent updates the content of a document
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func (ds *DocumentService) UpdateDocumentContent(id int64, content string) error {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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_, err := ds.db.Exec(sqlUpdateDocumentContent, content, time.Now(), id)
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if err != nil {
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return fmt.Errorf("failed to update document content: %w", err)
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}
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return nil
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}
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// UpdateDocumentTitle updates the title of a document
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func (ds *DocumentService) UpdateDocumentTitle(id int64, title string) error {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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_, err := ds.db.Exec(sqlUpdateDocumentTitle, title, time.Now(), id)
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if err != nil {
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return fmt.Errorf("failed to update document title: %w", err)
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}
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return nil
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}
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// DeleteDocument marks a document as deleted (default document with ID=1 cannot be deleted)
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func (ds *DocumentService) DeleteDocument(id int64) error {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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// 不允许删除默认文档
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if id == sqlDefaultDocumentID {
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return fmt.Errorf("cannot delete the default document")
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}
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_, err := ds.db.Exec(sqlMarkDocumentAsDeleted, time.Now(), id)
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if err != nil {
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return fmt.Errorf("failed to mark document as deleted: %w", err)
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}
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return nil
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}
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// RestoreDocument restores a deleted document
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func (ds *DocumentService) RestoreDocument(id int64) error {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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_, err := ds.db.Exec(sqlRestoreDocument, time.Now(), id)
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if err != nil {
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return fmt.Errorf("failed to restore document: %w", err)
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}
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return nil
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}
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// ListAllDocumentsMeta lists all active (non-deleted) document metadata
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func (ds *DocumentService) ListAllDocumentsMeta() ([]*models.Document, error) {
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ds.mu.RLock()
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defer ds.mu.RUnlock()
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rows, err := ds.db.Query(sqlListAllDocumentsMeta)
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if err != nil {
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return nil, fmt.Errorf("failed to list document meta: %w", err)
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}
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defer rows.Close()
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var documents []*models.Document
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for rows.Next() {
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var doc models.Document
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err := rows.Scan(&doc.ID, &doc.Title, &doc.CreatedAt, &doc.UpdatedAt)
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if err != nil {
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return nil, fmt.Errorf("failed to scan document meta: %w", err)
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}
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doc.IsDeleted = false
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documents = append(documents, &doc)
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}
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return documents, nil
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}
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// ListDeletedDocumentsMeta lists all deleted document metadata
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func (ds *DocumentService) ListDeletedDocumentsMeta() ([]*models.Document, error) {
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ds.mu.RLock()
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defer ds.mu.RUnlock()
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rows, err := ds.db.Query(sqlListDeletedDocumentsMeta)
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if err != nil {
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return nil, fmt.Errorf("failed to list deleted document meta: %w", err)
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}
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defer rows.Close()
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var documents []*models.Document
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for rows.Next() {
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var doc models.Document
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err := rows.Scan(&doc.ID, &doc.Title, &doc.CreatedAt, &doc.UpdatedAt)
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if err != nil {
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return nil, fmt.Errorf("failed to scan deleted document meta: %w", err)
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}
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doc.IsDeleted = true
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documents = append(documents, &doc)
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}
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return documents, nil
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}
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// GetFirstDocumentID gets the first active document's ID for frontend initialization
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func (ds *DocumentService) GetFirstDocumentID() (int64, error) {
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ds.mu.RLock()
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defer ds.mu.RUnlock()
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var id int64
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err := ds.db.QueryRow(sqlGetFirstDocumentID).Scan(&id)
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if err != nil {
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if err == sql.ErrNoRows {
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return 0, nil // No documents exist
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}
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return 0, fmt.Errorf("failed to get first document ID: %w", err)
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}
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return id, nil
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}
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// OnShutdown shuts down the service when the application closes
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func (ds *DocumentService) OnShutdown() error {
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if ds.db != nil {
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return ds.db.Close()
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}
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return nil
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}
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// OnDataPathChanged handles data path changes
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func (ds *DocumentService) OnDataPathChanged() error {
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// Close existing database
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if ds.db != nil {
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ds.db.Close()
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}
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// Reinitialize with new path
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return ds.initDatabase()
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}
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