Initial backend repository commit.

Set up project files and add .gitignore to exclude local build/runtime artifacts.

Made-with: Cursor

internal/repository/group_join_request_repo.go

@@ -0,0 +1,50 @@
+package repository
+
+import (
+	"carrot_bbs/internal/model"
+
+	"gorm.io/gorm"
+)
+
+type GroupJoinRequestRepository interface {
+	Create(req *model.GroupJoinRequest) error
+	GetByFlag(flag string) (*model.GroupJoinRequest, error)
+	Update(req *model.GroupJoinRequest) error
+	GetPendingByGroupAndTarget(groupID, targetUserID string, reqType model.GroupJoinRequestType) (*model.GroupJoinRequest, error)
+}
+
+type groupJoinRequestRepository struct {
+	db *gorm.DB
+}
+
+func NewGroupJoinRequestRepository(db *gorm.DB) GroupJoinRequestRepository {
+	return &groupJoinRequestRepository{db: db}
+}
+
+func (r *groupJoinRequestRepository) Create(req *model.GroupJoinRequest) error {
+	return r.db.Create(req).Error
+}
+
+func (r *groupJoinRequestRepository) GetByFlag(flag string) (*model.GroupJoinRequest, error) {
+	var req model.GroupJoinRequest
+	if err := r.db.Where("flag = ?", flag).First(&req).Error; err != nil {
+		return nil, err
+	}
+	return &req, nil
+}
+
+func (r *groupJoinRequestRepository) Update(req *model.GroupJoinRequest) error {
+	return r.db.Save(req).Error
+}
+
+func (r *groupJoinRequestRepository) GetPendingByGroupAndTarget(groupID, targetUserID string, reqType model.GroupJoinRequestType) (*model.GroupJoinRequest, error) {
+	var req model.GroupJoinRequest
+	err := r.db.Where("group_id = ? AND target_user_id = ? AND request_type = ? AND status = ?",
+		groupID, targetUserID, reqType, model.GroupJoinRequestStatusPending).
+		Order("created_at DESC").
+		First(&req).Error
+	if err != nil {
+		return nil, err
+	}
+	return &req, nil
+}