485 lines
12 KiB
Go
485 lines
12 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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"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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)
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// SQL constants for document operations
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const (
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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, is_locked
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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, is_locked)
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VALUES (?, ?, ?, ?, 0, 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 = ? AND is_deleted = 0`
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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 = ? AND is_deleted = 0`
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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 = ? AND is_locked = 0`
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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, is_locked
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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, is_locked
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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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sqlSetDocumentLocked = `
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UPDATE documents
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SET is_locked = 1, updated_at = ?
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WHERE id = ?`
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sqlSetDocumentUnlocked = `
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UPDATE documents
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SET is_locked = 0, updated_at = ?
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WHERE id = ?`
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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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databaseService *DatabaseService
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logger *log.Service
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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(databaseService *DatabaseService, logger *log.Service) *DocumentService {
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if logger == nil {
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logger = log.New()
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}
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ds := &DocumentService{
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databaseService: databaseService,
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logger: logger,
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}
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return ds
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}
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// ServiceStartup initializes the service when the application starts
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func (ds *DocumentService) ServiceStartup(ctx context.Context, options application.ServiceOptions) error {
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ds.ctx = ctx
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// 确保默认文档存在
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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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// ensureDefaultDocument ensures a default document exists
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func (ds *DocumentService) ensureDefaultDocument() error {
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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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// Check if any document exists
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var count int64
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err := ds.databaseService.db.QueryRow(sqlCountDocuments).Scan(&count)
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if err != nil {
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return fmt.Errorf("failed to query document count: %w", 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return nil, errors.New("database service not available")
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}
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doc := &models.Document{}
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var createdAt, updatedAt string
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var isDeleted, isLocked int
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err := ds.databaseService.db.QueryRow(sqlGetDocumentByID, id).Scan(
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&doc.ID,
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&doc.Title,
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&doc.Content,
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&createdAt,
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&updatedAt,
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&isDeleted,
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&isLocked,
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)
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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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// 转换时间字段
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if t, err := time.Parse("2006-01-02 15:04:05", createdAt); err == nil {
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doc.CreatedAt = t
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}
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if t, err := time.Parse("2006-01-02 15:04:05", updatedAt); err == nil {
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doc.UpdatedAt = t
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}
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// 转换布尔字段
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doc.IsDeleted = isDeleted == 1
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doc.IsLocked = isLocked == 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return nil, errors.New("database service not available")
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}
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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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IsLocked: false,
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}
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// 执行插入操作
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result, err := ds.databaseService.db.Exec(sqlInsertDocument,
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doc.Title, doc.Content, doc.CreatedAt.Format("2006-01-02 15:04:05"), doc.UpdatedAt.Format("2006-01-02 15:04:05"))
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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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// 获取自增ID
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lastID, 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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// 返回带ID的文档
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doc.ID = lastID
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return doc, nil
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}
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// LockDocument 锁定文档，防止删除
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func (ds *DocumentService) LockDocument(id int64) error {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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// 检查文档是否存在且未删除
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doc, err := ds.GetDocumentByID(id)
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if err != nil {
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return fmt.Errorf("failed to get document: %w", err)
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}
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if doc == nil {
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return fmt.Errorf("document not found: %d", id)
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}
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if doc.IsDeleted {
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return fmt.Errorf("cannot lock deleted document: %d", id)
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}
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// 如果已经锁定，无需操作
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if doc.IsLocked {
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return nil
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}
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_, err = ds.databaseService.db.Exec(sqlSetDocumentLocked, time.Now().Format("2006-01-02 15:04:05"), id)
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if err != nil {
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return fmt.Errorf("failed to lock document: %w", err)
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}
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return nil
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}
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// UnlockDocument 解锁文档
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func (ds *DocumentService) UnlockDocument(id int64) error {
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ds.mu.Lock()
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defer ds.mu.Unlock()
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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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// 检查文档是否存在
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doc, err := ds.GetDocumentByID(id)
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if err != nil {
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return fmt.Errorf("failed to get document: %w", err)
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}
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if doc == nil {
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return fmt.Errorf("document not found: %d", id)
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}
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// 如果未锁定，无需操作
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if !doc.IsLocked {
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return nil
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}
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_, err = ds.databaseService.db.Exec(sqlSetDocumentUnlocked, time.Now().Format("2006-01-02 15:04:05"), id)
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if err != nil {
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return fmt.Errorf("failed to unlock document: %w", err)
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}
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return 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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_, err := ds.databaseService.db.Exec(sqlUpdateDocumentContent, content, time.Now().Format("2006-01-02 15:04:05"), 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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_, err := ds.databaseService.db.Exec(sqlUpdateDocumentTitle, title, time.Now().Format("2006-01-02 15:04:05"), 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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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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// 检查文档是否锁定
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doc, err := ds.GetDocumentByID(id)
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if err != nil {
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return fmt.Errorf("failed to get document: %w", err)
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}
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if doc == nil {
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return fmt.Errorf("document not found: %d", id)
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}
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if doc.IsLocked {
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return fmt.Errorf("cannot delete locked document: %d", id)
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}
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_, err = ds.databaseService.db.Exec(sqlMarkDocumentAsDeleted, time.Now().Format("2006-01-02 15:04:05"), 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return errors.New("database service not available")
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}
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_, err := ds.databaseService.db.Exec(sqlRestoreDocument, time.Now().Format("2006-01-02 15:04:05"), 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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return nil, errors.New("database service not available")
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}
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rows, err := ds.databaseService.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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doc := &models.Document{IsDeleted: false}
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var createdAt, updatedAt string
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var isLocked int
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err := rows.Scan(
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&doc.ID,
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&doc.Title,
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&createdAt,
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&updatedAt,
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&isLocked,
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)
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if err != nil {
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return nil, fmt.Errorf("failed to scan document row: %w", err)
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}
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// 转换时间字段
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if t, err := time.Parse("2006-01-02 15:04:05", createdAt); err == nil {
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doc.CreatedAt = t
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}
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if t, err := time.Parse("2006-01-02 15:04:05", updatedAt); err == nil {
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doc.UpdatedAt = t
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}
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doc.IsLocked = isLocked == 1
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documents = append(documents, doc)
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}
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if err = rows.Err(); err != nil {
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return nil, fmt.Errorf("error iterating document rows: %w", err)
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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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return nil, errors.New("database service not available")
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}
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rows, err := ds.databaseService.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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doc := &models.Document{IsDeleted: true}
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var createdAt, updatedAt string
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var isLocked int
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err := rows.Scan(
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&doc.ID,
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&doc.Title,
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&createdAt,
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&updatedAt,
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&isLocked,
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)
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if err != nil {
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return nil, fmt.Errorf("failed to scan document row: %w", err)
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}
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// 转换时间字段
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if t, err := time.Parse("2006-01-02 15:04:05", createdAt); err == nil {
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doc.CreatedAt = t
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}
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if t, err := time.Parse("2006-01-02 15:04:05", updatedAt); err == nil {
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doc.UpdatedAt = t
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}
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doc.IsLocked = isLocked == 1
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documents = append(documents, doc)
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}
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if err = rows.Err(); err != nil {
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return nil, fmt.Errorf("error iterating deleted document rows: %w", err)
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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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if ds.databaseService == nil || ds.databaseService.db == nil {
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return 0, errors.New("database service not available")
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}
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var id int64
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err := ds.databaseService.db.QueryRow(sqlGetFirstDocumentID).Scan(&id)
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if err != nil {
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if errors.Is(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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