feat(canvas): 云端 Agent - 完成策略分层、节点能力注册与可解释审批改造

backend/internal/repository/agent_profile.go

@@ -0,0 +1,48 @@
+package repository
+
+import (
+	"infinite-canvas/backend/internal/model"
+
+	"gorm.io/gorm"
+)
+
+func (r *Repository) AgentProfile(userID, scope, projectID, canvasID string) (*model.AgentProfile, error) {
+	var profile model.AgentProfile
+	if err := r.db.Where("user_id = ? AND scope = ? AND project_id = ? AND canvas_id = ?", userID, scope, projectID, canvasID).First(&profile).Error; err != nil {
+		return nil, err
+	}
+	return &profile, nil
+}
+
+func (r *Repository) SaveAgentProfile(profile *model.AgentProfile, expectedRevision int64) error {
+	if profile == nil {
+		return gorm.ErrInvalidData
+	}
+	return r.db.Transaction(func(tx *gorm.DB) error {
+		var current model.AgentProfile
+		err := tx.Where("user_id = ? AND scope = ? AND project_id = ? AND canvas_id = ?", profile.UserID, profile.Scope, profile.ProjectID, profile.CanvasID).First(&current).Error
+		if err != nil && err != gorm.ErrRecordNotFound {
+			return err
+		}
+		if err == gorm.ErrRecordNotFound {
+			if expectedRevision != 0 {
+				return ErrTaskStateConflict
+			}
+			return tx.Create(profile).Error
+		}
+		if expectedRevision != current.Revision {
+			return ErrTaskStateConflict
+		}
+		profile.ID, profile.Revision, profile.CreatedAt = current.ID, current.Revision+1, current.CreatedAt
+		result := tx.Model(&model.AgentProfile{}).Where("id = ? AND revision = ?", current.ID, current.Revision).Updates(map[string]any{
+			"content": profile.Content, "revision": profile.Revision, "hash": profile.Hash, "updated_at": profile.UpdatedAt,
+		})
+		if result.Error != nil {
+			return result.Error
+		}
+		if result.RowsAffected != 1 {
+			return ErrTaskStateConflict
+		}
+		return nil
+	})
+}