Initial backend repository commit.

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

Made-with: Cursor

internal/model/group_join_request.go

@@ -0,0 +1,59 @@
+package model
+
+import (
+	"strconv"
+	"time"
+
+	"carrot_bbs/internal/pkg/utils"
+
+	"gorm.io/gorm"
+)
+
+type GroupJoinRequestType string
+
+const (
+	GroupJoinRequestTypeInvite    GroupJoinRequestType = "invite"
+	GroupJoinRequestTypeJoinApply GroupJoinRequestType = "join_apply"
+)
+
+type GroupJoinRequestStatus string
+
+const (
+	GroupJoinRequestStatusPending   GroupJoinRequestStatus = "pending"
+	GroupJoinRequestStatusAccepted  GroupJoinRequestStatus = "accepted"
+	GroupJoinRequestStatusRejected  GroupJoinRequestStatus = "rejected"
+	GroupJoinRequestStatusCancelled GroupJoinRequestStatus = "cancelled"
+	GroupJoinRequestStatusExpired   GroupJoinRequestStatus = "expired"
+)
+
+// GroupJoinRequest 统一保存邀请入群和主动加群申请
+type GroupJoinRequest struct {
+	ID           string                 `gorm:"primaryKey;size:20" json:"id"`
+	Flag         string                 `gorm:"size:64;uniqueIndex;not null" json:"flag"`
+	GroupID      string                 `gorm:"not null;index;index:idx_gjr_group_target_type_status_created,priority:1" json:"group_id"`
+	InitiatorID  string                 `gorm:"type:varchar(36);not null;index" json:"initiator_id"`
+	TargetUserID string                 `gorm:"type:varchar(36);not null;index;index:idx_gjr_group_target_type_status_created,priority:2" json:"target_user_id"`
+	RequestType  GroupJoinRequestType   `gorm:"size:20;not null;index;index:idx_gjr_group_target_type_status_created,priority:3" json:"request_type"`
+	Status       GroupJoinRequestStatus `gorm:"size:20;not null;index;index:idx_gjr_group_target_type_status_created,priority:4" json:"status"`
+	Reason       string                 `gorm:"size:500" json:"reason"`
+	ReviewerID   string                 `gorm:"type:varchar(36);index" json:"reviewer_id"`
+	ReviewedAt   *time.Time             `json:"reviewed_at"`
+	ExpireAt     *time.Time             `json:"expire_at"`
+	CreatedAt    time.Time              `gorm:"index:idx_gjr_group_target_type_status_created,priority:5,sort:desc" json:"created_at"`
+	UpdatedAt    time.Time              `json:"updated_at"`
+}
+
+func (r *GroupJoinRequest) BeforeCreate(tx *gorm.DB) error {
+	if r.ID == "" {
+		id, err := utils.GetSnowflake().GenerateID()
+		if err != nil {
+			return err
+		}
+		r.ID = strconv.FormatInt(id, 10)
+	}
+	return nil
+}
+
+func (GroupJoinRequest) TableName() string {
+	return "group_join_requests"
+}