feat(ai): add local expert library

backend/internal/logic/ai/experts.go

@@ -0,0 +1,62 @@
+package ai
+
+import (
+	"errors"
+	"strings"
+
+	"gorm.io/gorm"
+	"senlinai-agent/backend/internal/models"
+)
+
+// ExpertFilter 是本地专家库的查询条件。
+type ExpertFilter struct {
+	Category string
+	Query    string
+}
+
+func (s *SessionService) ListExperts(filter ExpertFilter) ([]models.SenlinAgentAIExpert, error) {
+	query := models.DBService.Model(&models.SenlinAgentAIExpert{}).Where("enabled = ?", true)
+	if category := strings.TrimSpace(filter.Category); category != "" {
+		query = query.Where("category = ?", category)
+	}
+	if keyword := strings.ToLower(strings.TrimSpace(filter.Query)); keyword != "" {
+		like := "%" + keyword + "%"
+		query = query.Where(
+			"LOWER(name) LIKE ? OR LOWER(description) LIKE ? OR LOWER(category_name) LIKE ?",
+			like, like, like,
+		)
+	}
+	var experts []models.SenlinAgentAIExpert
+	if err := query.Order("category asc, id asc").Find(&experts).Error; err != nil {
+		return nil, err
+	}
+	if experts == nil {
+		experts = []models.SenlinAgentAIExpert{}
+	}
+	return experts, nil
+}
+
+func (s *SessionService) GetExpert(identity string) (*models.SenlinAgentAIExpert, error) {
+	var expert models.SenlinAgentAIExpert
+	if err := models.DBService.Where("identity = ? AND enabled = ?", strings.TrimSpace(identity), true).First(&expert).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, ErrExpertNotFound
+		}
+		return nil, err
+	}
+	return &expert, nil
+}
+
+func findExpertByIdentity(tx *gorm.DB, identity string) (*models.SenlinAgentAIExpert, error) {
+	if strings.TrimSpace(identity) == "" {
+		return nil, nil
+	}
+	var expert models.SenlinAgentAIExpert
+	if err := tx.Where("identity = ? AND enabled = ?", identity, true).First(&expert).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, ErrExpertNotFound
+		}
+		return nil, err
+	}
+	return &expert, nil
+}