feat: add project workspace service

backend/internal/projects/service.go

@@ -0,0 +1,72 @@
+package projects
+
+import (
+	"errors"
+	"strings"
+
+	"gorm.io/gorm"
+	"senlinai-agent/backend/internal/domain"
+)
+
+type Service struct {
+	db *gorm.DB
+}
+
+type Dashboard struct {
+	ProjectID          uint  `json:"project_id"`
+	PendingInboxCount  int64 `json:"pending_inbox_count"`
+	OpenTaskCount      int64 `json:"open_task_count"`
+	RecentNoteCount    int64 `json:"recent_note_count"`
+	RecentSessionCount int64 `json:"recent_session_count"`
+}
+
+func NewService(database *gorm.DB) *Service {
+	return &Service{db: database}
+}
+
+func (s *Service) CreateProject(ownerID uint, name string, description string) (*domain.Project, error) {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return nil, errors.New("project name is required")
+	}
+	project := &domain.Project{OwnerID: ownerID, Name: name, Description: description}
+	return project, s.db.Create(project).Error
+}
+
+func (s *Service) ListProjects(ownerID uint) ([]domain.Project, error) {
+	var projects []domain.Project
+	err := s.db.Where("owner_id = ?", ownerID).Order("updated_at desc").Find(&projects).Error
+	return projects, err
+}
+
+func (s *Service) CreateTag(projectID uint, name string) (*domain.Tag, error) {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return nil, errors.New("tag name is required")
+	}
+	tag := &domain.Tag{ProjectID: projectID, Name: name}
+	return tag, s.db.Create(tag).Error
+}
+
+func (s *Service) ListTags(projectID uint) ([]domain.Tag, error) {
+	var tags []domain.Tag
+	err := s.db.Where("project_id = ?", projectID).Order("name asc").Find(&tags).Error
+	return tags, err
+}
+
+func (s *Service) Dashboard(projectID uint) (Dashboard, error) {
+	dashboard := Dashboard{ProjectID: projectID}
+	if err := s.db.Model(&domain.InboxItem{}).Where("project_id = ? AND status = ?", projectID, "open").Count(&dashboard.PendingInboxCount).Error; err != nil {
+		return dashboard, err
+	}
+	if err := s.db.Model(&domain.Task{}).Where("project_id = ? AND status <> ?", projectID, "done").Count(&dashboard.OpenTaskCount).Error; err != nil {
+		return dashboard, err
+	}
+	if err := s.db.Model(&domain.Note{}).Where("project_id = ?", projectID).Count(&dashboard.RecentNoteCount).Error; err != nil {
+		return dashboard, err
+	}
+	if err := s.db.Model(&domain.AISession{}).Where("project_id = ?", projectID).Count(&dashboard.RecentSessionCount).Error; err != nil {
+		return dashboard, err
+	}
+	return dashboard, nil
+}