1030 lines
30 KiB
Go
1030 lines
30 KiB
Go
package chat
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import (
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"encoding/json"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"time"
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"hfb_sys/backend/internal/model"
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"hfb_sys/backend/internal/modules/chathub"
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"golang.org/x/crypto/bcrypt"
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"gorm.io/datatypes"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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)
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type Repository struct {
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db *gorm.DB
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hub *chathub.Hub
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}
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const (
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defaultSupportUsername = "admin"
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defaultSupportPassword = "admin123456"
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defaultSupportNickname = "超级管理员"
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)
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func NewRepository(db *gorm.DB, hub *chathub.Hub) *Repository {
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return &Repository{db: db, hub: hub}
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}
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func EnsureOrderConversation(tx *gorm.DB, order model.RentalOrder) (*model.ChatConversation, error) {
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var existing model.ChatConversation
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err := tx.Where("order_id = ?", order.ID).First(&existing).Error
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if err == nil {
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return &existing, nil
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}
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if !errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, err
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}
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now := time.Now()
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conversation := model.ChatConversation{
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OrderID: &order.ID,
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Type: "order_group",
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Title: orderConversationTitle(order),
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Status: "active",
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}
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if err := tx.Create(&conversation).Error; err != nil {
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return nil, err
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}
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participants := []model.ChatParticipant{
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{
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ConversationID: conversation.ID,
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ParticipantType: "user",
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ParticipantID: order.RenterID,
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Role: "renter",
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JoinedAt: now,
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},
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{
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ConversationID: conversation.ID,
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ParticipantType: "user",
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ParticipantID: order.OwnerID,
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Role: "owner",
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JoinedAt: now,
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},
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}
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if supportID := defaultSupportAdminID(tx); supportID > 0 {
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participants = append(participants, model.ChatParticipant{
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ConversationID: conversation.ID,
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ParticipantType: "admin",
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ParticipantID: supportID,
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Role: "support",
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JoinedAt: now,
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})
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}
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for _, participant := range participants {
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if err := tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&participant).Error; err != nil {
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return nil, err
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}
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}
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// 获取自动话术
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autoMessage := "订单已支付，群聊已创建。租客、号主和客服可在这里沟通交接与结账问题。"
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var cfg model.SystemConfig
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if err := tx.Where("`key` = ?", "chat.auto_welcome_message").First(&cfg).Error; err == nil && cfg.Value != "" {
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autoMessage = cfg.Value
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}
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message := model.ChatMessage{
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ConversationID: conversation.ID,
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SenderType: "system",
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SenderRole: "system",
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ContentType: "system",
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Content: autoMessage,
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AttachmentURLS: emptyJSONList(),
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}
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if err := tx.Create(&message).Error; err != nil {
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return nil, err
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}
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conversation.LastMessageID = &message.ID
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conversation.LastMessagePreview = truncatePreview(message.Content)
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conversation.LastMessageAt = &message.CreatedAt
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if err := tx.Save(&conversation).Error; err != nil {
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return nil, err
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}
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return &conversation, nil
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}
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// NotifyNewConversation 推送群聊创建事件给会话参与者。应在事务提交后调用。
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func (r *Repository) NotifyNewConversation(conversationID uint64) {
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if r.hub == nil {
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return
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}
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r.hub.NotifyConversation(conversationID, &chathub.ChatEvent{
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Type: "conversation_updated",
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ConversationID: conversationID,
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})
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}
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func (r *Repository) ListConversations(principal Principal, page, pageSize int) (*PaginatedResult, error) {
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page, pageSize = normalizePagination(page, pageSize)
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var total int64
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countDB := r.db.Table("chat_conversations AS c").
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Joins("JOIN chat_participants AS cp ON cp.conversation_id = c.id").
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Where("cp.participant_type = ? AND cp.participant_id = ?", principal.Type, principal.ID)
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if err := countDB.Count(&total).Error; err != nil {
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return nil, err
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}
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var rows []conversationRow
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offset := (page - 1) * pageSize
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err := r.conversationQuery(principal).
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Order("COALESCE(c.last_message_at, c.created_at) DESC, c.id DESC").
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Offset(offset).
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Limit(pageSize).
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Scan(&rows).Error
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if err != nil {
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return nil, err
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}
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items := make([]ConversationDTO, 0, len(rows))
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for _, row := range rows {
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items = append(items, row.toDTO(nil))
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}
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return &PaginatedResult{Items: items, Total: total, Page: page, PageSize: pageSize}, nil
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}
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func (r *Repository) FindConversation(principal Principal, id uint64) (*ConversationDTO, error) {
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var row conversationRow
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err := r.conversationQuery(principal).Where("c.id = ?", id).First(&row).Error
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrConversationNotFound
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}
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return nil, err
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}
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participants, err := r.participants(row.ID)
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if err != nil {
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return nil, err
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}
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dto := row.toDTO(participants)
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return &dto, nil
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}
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func (r *Repository) FindOrderConversation(userID uint64, orderID uint64) (*ConversationDTO, error) {
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var row conversationRow
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principal := Principal{Type: "user", ID: userID}
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err := r.conversationQuery(principal).Where("c.order_id = ?", orderID).First(&row).Error
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrConversationNotFound
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}
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return nil, err
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}
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participants, err := r.participants(row.ID)
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if err != nil {
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return nil, err
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}
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dto := row.toDTO(participants)
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return &dto, nil
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}
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func (r *Repository) EnsureSupportConversation(userID uint64) (*ConversationDTO, error) {
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var conversationID uint64
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err := r.db.Transaction(func(tx *gorm.DB) error {
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var existing model.ChatConversation
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err := tx.Table("chat_conversations AS c").
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Select("c.*").
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Joins("JOIN chat_participants AS cp ON cp.conversation_id = c.id").
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Where("c.type = ? AND cp.participant_type = ? AND cp.participant_id = ?", "general_support", "user", userID).
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Order("c.id ASC").
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Limit(1).
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Find(&existing).Error
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if err != nil {
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return err
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}
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if existing.ID > 0 {
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conversationID = existing.ID
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return nil
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}
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now := time.Now()
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conversation := model.ChatConversation{
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Type: "general_support",
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Title: "平台客服",
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Status: "active",
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}
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if err := tx.Create(&conversation).Error; err != nil {
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return err
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}
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participants := []model.ChatParticipant{
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{
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ConversationID: conversation.ID,
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ParticipantType: "user",
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ParticipantID: userID,
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Role: "customer",
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JoinedAt: now,
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},
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}
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if supportID := defaultSupportAdminID(tx); supportID > 0 {
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participants = append(participants, model.ChatParticipant{
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ConversationID: conversation.ID,
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ParticipantType: "admin",
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ParticipantID: supportID,
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Role: "support",
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JoinedAt: now,
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})
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}
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for _, participant := range participants {
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if err := tx.Clauses(clause.OnConflict{DoNothing: true}).Create(&participant).Error; err != nil {
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return err
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}
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}
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message := model.ChatMessage{
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ConversationID: conversation.ID,
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SenderType: "system",
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SenderRole: "system",
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ContentType: "system",
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Content: "您好，客服会尽快回复，请直接描述您遇到的问题。",
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AttachmentURLS: emptyJSONList(),
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}
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if err := tx.Create(&message).Error; err != nil {
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return err
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}
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conversation.LastMessageID = &message.ID
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conversation.LastMessagePreview = truncatePreview(message.Content)
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conversation.LastMessageAt = &message.CreatedAt
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if err := tx.Save(&conversation).Error; err != nil {
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return err
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}
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conversationID = conversation.ID
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return nil
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})
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if err != nil {
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return nil, err
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}
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item, err := r.FindConversation(Principal{Type: "user", ID: userID}, conversationID)
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if err != nil {
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return nil, err
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}
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r.NotifyNewConversation(conversationID)
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return item, nil
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}
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func (r *Repository) Messages(principal Principal, conversationID uint64, page, pageSize int) (*PaginatedResult, error) {
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page, pageSize = normalizePagination(page, pageSize)
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if _, err := r.findParticipant(r.db, principal, conversationID, false); err != nil {
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return nil, err
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}
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var total int64
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if err := r.db.Model(&model.ChatMessage{}).Where("conversation_id = ?", conversationID).Count(&total).Error; err != nil {
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return nil, err
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}
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offset := (page - 1) * pageSize
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var rows []model.ChatMessage
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if err := r.db.Where("conversation_id = ?", conversationID).
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Order("id ASC").
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Offset(offset).
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Limit(pageSize).
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Find(&rows).Error; err != nil {
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return nil, err
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}
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items, err := r.toMessageDTOs(principal, rows)
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if err != nil {
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return nil, err
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}
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return &PaginatedResult{Items: items, Total: total, Page: page, PageSize: pageSize}, nil
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}
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func (r *Repository) SendMessage(principal Principal, conversationID uint64, req SendMessageRequest) (*MessageDTO, error) {
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var messageID uint64
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err := r.db.Transaction(func(tx *gorm.DB) error {
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participant, err := r.findParticipant(tx, principal, conversationID, true)
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if err != nil {
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return err
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}
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var conversation model.ChatConversation
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if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).First(&conversation, conversationID).Error; err != nil {
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return err
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}
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if conversation.Status != "active" {
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return ErrPermissionDenied
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}
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message := model.ChatMessage{
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ConversationID: conversation.ID,
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SenderType: principal.Type,
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SenderID: principal.ID,
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SenderRole: participant.Role,
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ContentType: "text",
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Content: req.Content,
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AttachmentURLS: encodeStringList(req.AttachmentURLS),
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}
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if err := tx.Create(&message).Error; err != nil {
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return err
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}
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conversation.LastMessageID = &message.ID
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conversation.LastMessagePreview = messagePreview(message.Content, req.AttachmentURLS)
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conversation.LastMessageAt = &message.CreatedAt
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if err := tx.Save(&conversation).Error; err != nil {
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return err
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}
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now := time.Now()
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if err := tx.Model(participant).Update("last_read_at", now).Error; err != nil {
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return err
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}
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messageID = message.ID
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return nil
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})
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if err != nil {
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return nil, err
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}
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var message model.ChatMessage
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if err := r.db.First(&message, messageID).Error; err != nil {
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return nil, err
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}
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items, err := r.toMessageDTOs(principal, []model.ChatMessage{message})
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if err != nil {
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return nil, err
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}
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if len(items) == 0 {
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return nil, ErrConversationNotFound
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}
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// 推送新消息事件给会话中的在线参与者
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if r.hub != nil {
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msg := items[0]
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r.hub.NotifyConversation(conversationID, &chathub.ChatEvent{
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Type: "new_message",
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ConversationID: conversationID,
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Message: &chathub.MessageData{
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ID: msg.ID,
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ConversationID: msg.ConversationID,
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SenderType: msg.SenderType,
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SenderID: msg.SenderID,
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SenderRole: msg.SenderRole,
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SenderName: msg.SenderName,
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ContentType: msg.ContentType,
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Content: msg.Content,
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AttachmentURLS: msg.AttachmentURLS,
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CreatedAt: msg.CreatedAt.Format(time.RFC3339),
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},
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})
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}
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return &items[0], nil
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}
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func (r *Repository) MarkRead(principal Principal, conversationID uint64) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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participant, err := r.findParticipant(tx, principal, conversationID, true)
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if err != nil {
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return err
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}
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now := time.Now()
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return tx.Model(participant).Update("last_read_at", now).Error
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})
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}
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func (r *Repository) conversationQuery(principal Principal) *gorm.DB {
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return r.db.Table("chat_conversations AS c").
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Select(`c.id, c.order_id, c.type, c.title, c.status, c.last_message_id,
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c.last_message_preview, c.last_message_at, c.created_at, c.updated_at, cp.role,
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(
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SELECT COUNT(1)
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FROM chat_messages AS cm
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WHERE cm.conversation_id = c.id
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AND NOT (cm.sender_type = ? AND cm.sender_id = ?)
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AND (cp.last_read_at IS NULL OR cm.created_at > cp.last_read_at)
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) AS unread_count`, principal.Type, principal.ID).
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Joins("JOIN chat_participants AS cp ON cp.conversation_id = c.id").
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Where("cp.participant_type = ? AND cp.participant_id = ?", principal.Type, principal.ID)
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}
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func (r *Repository) findParticipant(tx *gorm.DB, principal Principal, conversationID uint64, lock bool) (*model.ChatParticipant, error) {
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var participant model.ChatParticipant
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db := tx
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if lock {
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db = db.Clauses(clause.Locking{Strength: "UPDATE"})
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}
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err := db.Where("conversation_id = ? AND participant_type = ? AND participant_id = ?", conversationID, principal.Type, principal.ID).
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First(&participant).Error
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrPermissionDenied
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}
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return nil, err
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}
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return &participant, nil
|
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}
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func (r *Repository) participants(conversationID uint64) ([]ParticipantDTO, error) {
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var rows []model.ChatParticipant
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if err := r.db.Where("conversation_id = ?", conversationID).Order("id ASC").Find(&rows).Error; err != nil {
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return nil, err
|
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}
|
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userNames, userAvatars, adminNames, err := r.participantNames(rows)
|
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if err != nil {
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return nil, err
|
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}
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items := make([]ParticipantDTO, 0, len(rows))
|
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for _, row := range rows {
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name := "系统"
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avatar := ""
|
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if row.ParticipantType == "user" {
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name = userNames[row.ParticipantID]
|
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avatar = userAvatars[row.ParticipantID]
|
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}
|
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if row.ParticipantType == "admin" {
|
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name = adminNames[row.ParticipantID]
|
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}
|
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items = append(items, ParticipantDTO{
|
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ID: row.ID,
|
|
ConversationID: row.ConversationID,
|
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ParticipantType: row.ParticipantType,
|
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ParticipantID: row.ParticipantID,
|
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Role: row.Role,
|
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DisplayName: fallbackName(row.ParticipantType, row.ParticipantID, name),
|
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AvatarURL: avatar,
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LastReadAt: row.LastReadAt,
|
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JoinedAt: row.JoinedAt,
|
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})
|
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}
|
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return items, nil
|
|
}
|
|
|
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func (r *Repository) toMessageDTOs(principal Principal, rows []model.ChatMessage) ([]MessageDTO, error) {
|
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userIDs := make([]uint64, 0)
|
|
adminIDs := make([]uint64, 0)
|
|
for _, row := range rows {
|
|
if row.SenderType == "user" && row.SenderID > 0 {
|
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userIDs = append(userIDs, row.SenderID)
|
|
}
|
|
if row.SenderType == "admin" && row.SenderID > 0 {
|
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adminIDs = append(adminIDs, row.SenderID)
|
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}
|
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}
|
|
userNames, userAvatars, err := r.userNames(userIDs)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
adminNames, err := r.adminNames(adminIDs)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
items := make([]MessageDTO, 0, len(rows))
|
|
for _, row := range rows {
|
|
name := "系统"
|
|
avatar := ""
|
|
if row.SenderType == "user" {
|
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name = userNames[row.SenderID]
|
|
avatar = userAvatars[row.SenderID]
|
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}
|
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if row.SenderType == "admin" {
|
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name = adminNames[row.SenderID]
|
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}
|
|
items = append(items, MessageDTO{
|
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ID: row.ID,
|
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ConversationID: row.ConversationID,
|
|
SenderType: row.SenderType,
|
|
SenderID: row.SenderID,
|
|
SenderRole: row.SenderRole,
|
|
SenderName: fallbackName(row.SenderType, row.SenderID, name),
|
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SenderAvatar: avatar,
|
|
IsSelf: row.SenderType == principal.Type && row.SenderID == principal.ID,
|
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ContentType: row.ContentType,
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Content: row.Content,
|
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AttachmentURLS: decodeStringList(row.AttachmentURLS),
|
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CreatedAt: row.CreatedAt,
|
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})
|
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}
|
|
return items, nil
|
|
}
|
|
|
|
func (r *Repository) participantNames(rows []model.ChatParticipant) (map[uint64]string, map[uint64]string, map[uint64]string, error) {
|
|
userIDs := make([]uint64, 0)
|
|
adminIDs := make([]uint64, 0)
|
|
for _, row := range rows {
|
|
if row.ParticipantType == "user" {
|
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userIDs = append(userIDs, row.ParticipantID)
|
|
}
|
|
if row.ParticipantType == "admin" {
|
|
adminIDs = append(adminIDs, row.ParticipantID)
|
|
}
|
|
}
|
|
userNames, userAvatars, err := r.userNames(userIDs)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
adminNames, err := r.adminNames(adminIDs)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
return userNames, userAvatars, adminNames, nil
|
|
}
|
|
|
|
func (r *Repository) userNames(ids []uint64) (map[uint64]string, map[uint64]string, error) {
|
|
names := map[uint64]string{}
|
|
avatars := map[uint64]string{}
|
|
if len(ids) == 0 {
|
|
return names, avatars, nil
|
|
}
|
|
var users []model.User
|
|
if err := r.db.Where("id IN ?", uniqueIDs(ids)).Find(&users).Error; err != nil {
|
|
return nil, nil, err
|
|
}
|
|
for _, user := range users {
|
|
name := user.Nickname
|
|
if name == "" {
|
|
name = user.Phone
|
|
}
|
|
names[user.ID] = name
|
|
avatars[user.ID] = user.AvatarURL
|
|
}
|
|
return names, avatars, nil
|
|
}
|
|
|
|
func (r *Repository) adminNames(ids []uint64) (map[uint64]string, error) {
|
|
names := map[uint64]string{}
|
|
if len(ids) == 0 {
|
|
return names, nil
|
|
}
|
|
var admins []model.AdminUser
|
|
if err := r.db.Where("id IN ?", uniqueIDs(ids)).Find(&admins).Error; err != nil {
|
|
return nil, err
|
|
}
|
|
for _, admin := range admins {
|
|
name := admin.Nickname
|
|
if name == "" {
|
|
name = admin.Username
|
|
}
|
|
names[admin.ID] = name
|
|
}
|
|
return names, nil
|
|
}
|
|
|
|
type conversationRow struct {
|
|
ID uint64
|
|
OrderID *uint64
|
|
Type string
|
|
Title string
|
|
Status string
|
|
Role string
|
|
LastMessageID *uint64
|
|
LastMessagePreview string
|
|
LastMessageAt *time.Time
|
|
UnreadCount int64
|
|
CreatedAt time.Time
|
|
UpdatedAt time.Time
|
|
}
|
|
|
|
func (row conversationRow) toDTO(participants []ParticipantDTO) ConversationDTO {
|
|
return ConversationDTO{
|
|
ID: row.ID,
|
|
OrderID: row.OrderID,
|
|
Type: row.Type,
|
|
Title: row.Title,
|
|
Status: row.Status,
|
|
Role: row.Role,
|
|
Participants: participants,
|
|
LastMessageID: row.LastMessageID,
|
|
LastMessagePreview: row.LastMessagePreview,
|
|
LastMessageAt: row.LastMessageAt,
|
|
UnreadCount: row.UnreadCount,
|
|
CreatedAt: row.CreatedAt,
|
|
UpdatedAt: row.UpdatedAt,
|
|
}
|
|
}
|
|
|
|
func defaultSupportAdminID(tx *gorm.DB) uint64 {
|
|
// 查询所有有 chat:view 权限且状态为 active 的管理员
|
|
var adminIDs []uint64
|
|
err := tx.Table("admin_users AS au").
|
|
Joins("JOIN admin_user_roles AS aur ON aur.admin_user_id = au.id").
|
|
Joins("JOIN role_permissions AS rp ON rp.role_id = aur.role_id").
|
|
Joins("JOIN permissions AS p ON p.id = rp.permission_id").
|
|
Where("au.status = ? AND p.code = ?", "active", "chat:view").
|
|
Distinct("au.id").
|
|
Pluck("au.id", &adminIDs).Error
|
|
if err != nil || len(adminIDs) == 0 {
|
|
// 回退到原有逻辑
|
|
return fallbackSupportAdminID(tx)
|
|
}
|
|
|
|
// 统计每个客服当前负责的会话数，选择负载最少的
|
|
type adminLoad struct {
|
|
AdminID uint64
|
|
Count int64
|
|
}
|
|
var loads []adminLoad
|
|
tx.Table("chat_participants AS cp").
|
|
Select("cp.participant_id AS admin_id, COUNT(*) AS count").
|
|
Where("cp.participant_type = ? AND cp.role = ? AND cp.participant_id IN ?", "admin", "support", adminIDs).
|
|
Group("cp.participant_id").
|
|
Scan(&loads)
|
|
|
|
loadMap := make(map[uint64]int64)
|
|
for _, l := range loads {
|
|
loadMap[l.AdminID] = l.Count
|
|
}
|
|
|
|
// 找到负载最少的客服
|
|
var minLoad int64 = -1
|
|
var selectedID uint64
|
|
for _, id := range adminIDs {
|
|
count := loadMap[id]
|
|
if minLoad < 0 || count < minLoad {
|
|
minLoad = count
|
|
selectedID = id
|
|
}
|
|
}
|
|
if selectedID > 0 {
|
|
return selectedID
|
|
}
|
|
return fallbackSupportAdminID(tx)
|
|
}
|
|
|
|
func fallbackSupportAdminID(tx *gorm.DB) uint64 {
|
|
var cfg model.SystemConfig
|
|
if err := tx.Where("`key` = ?", "chat.default_support_admin_id").First(&cfg).Error; err == nil {
|
|
id, parseErr := strconv.ParseUint(cfg.Value, 10, 64)
|
|
if parseErr == nil && id > 0 && adminActive(tx, id) {
|
|
return id
|
|
}
|
|
}
|
|
var admin model.AdminUser
|
|
if err := tx.Where("status = ?", "active").Order("id ASC").First(&admin).Error; err != nil {
|
|
return ensureDefaultSupportAdmin(tx)
|
|
}
|
|
return admin.ID
|
|
}
|
|
|
|
func ensureDefaultSupportAdmin(tx *gorm.DB) uint64 {
|
|
var count int64
|
|
if err := tx.Model(&model.AdminUser{}).Count(&count).Error; err != nil || count > 0 {
|
|
return 0
|
|
}
|
|
hash, err := bcrypt.GenerateFromPassword([]byte(defaultSupportPassword), bcrypt.DefaultCost)
|
|
if err != nil {
|
|
return 0
|
|
}
|
|
admin := model.AdminUser{
|
|
Username: defaultSupportUsername,
|
|
PasswordHash: string(hash),
|
|
Nickname: defaultSupportNickname,
|
|
Status: "active",
|
|
}
|
|
if err := tx.Create(&admin).Error; err != nil {
|
|
return 0
|
|
}
|
|
return admin.ID
|
|
}
|
|
|
|
func adminActive(tx *gorm.DB, id uint64) bool {
|
|
var count int64
|
|
if err := tx.Model(&model.AdminUser{}).Where("id = ? AND status = ?", id, "active").Count(&count).Error; err != nil {
|
|
return false
|
|
}
|
|
return count > 0
|
|
}
|
|
|
|
func orderConversationTitle(order model.RentalOrder) string {
|
|
if order.OrderNo == "" {
|
|
return fmt.Sprintf("订单群聊 #%d", order.ID)
|
|
}
|
|
return "订单群聊 " + order.OrderNo
|
|
}
|
|
|
|
func normalizePagination(page, pageSize int) (int, int) {
|
|
if page < 1 {
|
|
page = 1
|
|
}
|
|
if pageSize < 1 {
|
|
pageSize = 20
|
|
}
|
|
if pageSize > 100 {
|
|
pageSize = 100
|
|
}
|
|
return page, pageSize
|
|
}
|
|
|
|
func truncatePreview(content string) string {
|
|
runes := []rune(content)
|
|
if len(runes) <= 80 {
|
|
return content
|
|
}
|
|
return string(runes[:80])
|
|
}
|
|
|
|
func messagePreview(content string, attachments []string) string {
|
|
content = strings.TrimSpace(content)
|
|
if content != "" {
|
|
return truncatePreview(content)
|
|
}
|
|
if len(attachments) > 0 {
|
|
return "[图片]"
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// TransferConversation 转接会话给其他客服
|
|
func (r *Repository) TransferConversation(principal Principal, conversationID uint64, toAdminID uint64) error {
|
|
return r.db.Transaction(func(tx *gorm.DB) error {
|
|
// 验证当前操作者是会话参与者
|
|
if _, err := r.findParticipant(tx, principal, conversationID, false); err != nil {
|
|
return err
|
|
}
|
|
// 验证目标客服存在且活跃
|
|
if !adminActive(tx, toAdminID) {
|
|
return fmt.Errorf("目标客服不存在或已禁用")
|
|
}
|
|
// 检查目标客服是否已有该会话
|
|
var count int64
|
|
if err := tx.Model(&model.ChatParticipant{}).
|
|
Where("conversation_id = ? AND participant_type = ? AND participant_id = ?", conversationID, "admin", toAdminID).
|
|
Count(&count).Error; err != nil {
|
|
return err
|
|
}
|
|
if count > 0 {
|
|
return fmt.Errorf("该客服已在会话中")
|
|
}
|
|
// 删除原客服参与者
|
|
if err := tx.Where("conversation_id = ? AND participant_type = ? AND role = ?", conversationID, "admin", "support").
|
|
Delete(&model.ChatParticipant{}).Error; err != nil {
|
|
return err
|
|
}
|
|
// 添加新客服参与者
|
|
participant := model.ChatParticipant{
|
|
ConversationID: conversationID,
|
|
ParticipantType: "admin",
|
|
ParticipantID: toAdminID,
|
|
Role: "support",
|
|
JoinedAt: time.Now(),
|
|
}
|
|
if err := tx.Create(&participant).Error; err != nil {
|
|
return err
|
|
}
|
|
// 添加系统消息记录转接
|
|
message := model.ChatMessage{
|
|
ConversationID: conversationID,
|
|
SenderType: "system",
|
|
SenderRole: "system",
|
|
ContentType: "system",
|
|
Content: "会话已转接给其他客服",
|
|
AttachmentURLS: emptyJSONList(),
|
|
}
|
|
if err := tx.Create(&message).Error; err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// GetAvailableSupportAdmins 获取可用客服列表及其会话数
|
|
func (r *Repository) GetAvailableSupportAdmins() ([]SupportAdminDTO, error) {
|
|
// 查询所有有 chat:view 权限且状态为 active 的管理员
|
|
type adminRow struct {
|
|
ID uint64
|
|
Nickname string
|
|
}
|
|
var admins []adminRow
|
|
err := r.db.Table("admin_users AS au").
|
|
Select("DISTINCT au.id, COALESCE(NULLIF(au.nickname, ''), au.username) AS nickname").
|
|
Joins("JOIN admin_user_roles AS aur ON aur.admin_user_id = au.id").
|
|
Joins("JOIN role_permissions AS rp ON rp.role_id = aur.role_id").
|
|
Joins("JOIN permissions AS p ON p.id = rp.permission_id").
|
|
Where("au.status = ? AND p.code = ?", "active", "chat:view").
|
|
Scan(&admins).Error
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// 统计每个客服的会话数
|
|
type loadRow struct {
|
|
AdminID uint64
|
|
Count int64
|
|
}
|
|
var loads []loadRow
|
|
adminIDs := make([]uint64, len(admins))
|
|
for i, a := range admins {
|
|
adminIDs[i] = a.ID
|
|
}
|
|
if len(adminIDs) > 0 {
|
|
r.db.Table("chat_participants").
|
|
Select("participant_id AS admin_id, COUNT(*) AS count").
|
|
Where("participant_type = ? AND role = ? AND participant_id IN ?", "admin", "support", adminIDs).
|
|
Group("participant_id").
|
|
Scan(&loads)
|
|
}
|
|
loadMap := make(map[uint64]int64)
|
|
for _, l := range loads {
|
|
loadMap[l.AdminID] = l.Count
|
|
}
|
|
|
|
result := make([]SupportAdminDTO, len(admins))
|
|
for i, a := range admins {
|
|
result[i] = SupportAdminDTO{
|
|
ID: a.ID,
|
|
Nickname: a.Nickname,
|
|
ChatCount: loadMap[a.ID],
|
|
}
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
// ListConversationsWithFilter 支持筛选的会话列表
|
|
func (r *Repository) ListConversationsWithFilter(principal Principal, page, pageSize int, filter string) (*PaginatedResult, error) {
|
|
page, pageSize = normalizePagination(page, pageSize)
|
|
var total int64
|
|
|
|
countDB := r.db.Table("chat_conversations AS c").
|
|
Joins("JOIN chat_participants AS cp ON cp.conversation_id = c.id")
|
|
|
|
switch filter {
|
|
case "mine":
|
|
// 只看我的会话
|
|
countDB = countDB.Where("cp.participant_type = ? AND cp.participant_id = ?", principal.Type, principal.ID)
|
|
case "unassigned":
|
|
// 未分配客服的会话
|
|
countDB = countDB.Where("c.id NOT IN (?)",
|
|
r.db.Table("chat_participants").Select("conversation_id").Where("participant_type = ? AND role = ?", "admin", "support"))
|
|
default:
|
|
// 全部会话（admin 可以看所有）
|
|
if principal.Type == "admin" {
|
|
// 管理员看所有会话
|
|
} else {
|
|
countDB = countDB.Where("cp.participant_type = ? AND cp.participant_id = ?", principal.Type, principal.ID)
|
|
}
|
|
}
|
|
|
|
if err := countDB.Count(&total).Error; err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var rows []conversationRow
|
|
offset := (page - 1) * pageSize
|
|
|
|
queryDB := r.conversationQuery(principal)
|
|
switch filter {
|
|
case "mine":
|
|
queryDB = queryDB.Where("cp.participant_type = ? AND cp.participant_id = ?", principal.Type, principal.ID)
|
|
case "unassigned":
|
|
queryDB = queryDB.Where("c.id NOT IN (?)",
|
|
r.db.Table("chat_participants").Select("conversation_id").Where("participant_type = ? AND role = ?", "admin", "support"))
|
|
default:
|
|
if principal.Type == "admin" {
|
|
// 管理员看所有会话
|
|
} else {
|
|
queryDB = queryDB.Where("cp.participant_type = ? AND cp.participant_id = ?", principal.Type, principal.ID)
|
|
}
|
|
}
|
|
|
|
err := queryDB.
|
|
Order("COALESCE(c.last_message_at, c.created_at) DESC, c.id DESC").
|
|
Offset(offset).
|
|
Limit(pageSize).
|
|
Scan(&rows).Error
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
items := make([]ConversationDTO, 0, len(rows))
|
|
for _, row := range rows {
|
|
items = append(items, row.toDTO(nil))
|
|
}
|
|
return &PaginatedResult{Items: items, Total: total, Page: page, PageSize: pageSize}, nil
|
|
}
|
|
|
|
func fallbackName(participantType string, id uint64, name string) string {
|
|
if name != "" {
|
|
return name
|
|
}
|
|
switch participantType {
|
|
case "admin":
|
|
return "客服"
|
|
case "system":
|
|
return "系统"
|
|
default:
|
|
return fmt.Sprintf("用户%d", id)
|
|
}
|
|
}
|
|
|
|
func uniqueIDs(ids []uint64) []uint64 {
|
|
seen := map[uint64]bool{}
|
|
result := make([]uint64, 0, len(ids))
|
|
for _, id := range ids {
|
|
if id == 0 || seen[id] {
|
|
continue
|
|
}
|
|
seen[id] = true
|
|
result = append(result, id)
|
|
}
|
|
return result
|
|
}
|
|
|
|
func emptyJSONList() datatypes.JSON {
|
|
raw, _ := json.Marshal([]string{})
|
|
return datatypes.JSON(raw)
|
|
}
|
|
|
|
func encodeStringList(items []string) datatypes.JSON {
|
|
raw, _ := json.Marshal(items)
|
|
return datatypes.JSON(raw)
|
|
}
|
|
|
|
// UpdateRemark 更新会话备注
|
|
func (r *Repository) UpdateRemark(principal Principal, conversationID uint64, remark string) error {
|
|
return r.db.Model(&model.ChatParticipant{}).
|
|
Where("conversation_id = ? AND participant_type = ? AND participant_id = ?", conversationID, principal.Type, principal.ID).
|
|
Update("remark", remark).Error
|
|
}
|
|
|
|
// ListQuickReplies 获取快捷回复列表（个人 + 全局）
|
|
func (r *Repository) ListQuickReplies(adminID uint64) ([]QuickReplyDTO, error) {
|
|
var replies []model.ChatQuickReply
|
|
err := r.db.Where("admin_user_id = ? OR admin_user_id = 0", adminID).
|
|
Order("admin_user_id DESC, sort_order ASC, id ASC").
|
|
Find(&replies).Error
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result := make([]QuickReplyDTO, len(replies))
|
|
for i, reply := range replies {
|
|
result[i] = QuickReplyDTO{
|
|
ID: reply.ID,
|
|
AdminUserID: reply.AdminUserID,
|
|
Title: reply.Title,
|
|
Content: reply.Content,
|
|
SortOrder: reply.SortOrder,
|
|
IsGlobal: reply.AdminUserID == 0,
|
|
}
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
// CreateQuickReply 创建快捷回复
|
|
func (r *Repository) CreateQuickReply(adminID uint64, req CreateQuickReplyRequest) (*QuickReplyDTO, error) {
|
|
reply := model.ChatQuickReply{
|
|
AdminUserID: adminID,
|
|
Title: req.Title,
|
|
Content: req.Content,
|
|
SortOrder: req.SortOrder,
|
|
}
|
|
if err := r.db.Create(&reply).Error; err != nil {
|
|
return nil, err
|
|
}
|
|
return &QuickReplyDTO{
|
|
ID: reply.ID,
|
|
AdminUserID: reply.AdminUserID,
|
|
Title: reply.Title,
|
|
Content: reply.Content,
|
|
SortOrder: reply.SortOrder,
|
|
IsGlobal: false,
|
|
}, nil
|
|
}
|
|
|
|
// UpdateQuickReply 更新快捷回复
|
|
func (r *Repository) UpdateQuickReply(adminID uint64, replyID uint64, req UpdateQuickReplyRequest) error {
|
|
query := r.db.Model(&model.ChatQuickReply{}).Where("id = ? AND (admin_user_id = ? OR admin_user_id = 0)", replyID, adminID)
|
|
updates := map[string]interface{}{}
|
|
if req.Title != "" {
|
|
updates["title"] = req.Title
|
|
}
|
|
if req.Content != "" {
|
|
updates["content"] = req.Content
|
|
}
|
|
if req.SortOrder != nil {
|
|
updates["sort_order"] = *req.SortOrder
|
|
}
|
|
if len(updates) == 0 {
|
|
return nil
|
|
}
|
|
return query.Updates(updates).Error
|
|
}
|
|
|
|
// DeleteQuickReply 删除快捷回复
|
|
func (r *Repository) DeleteQuickReply(adminID uint64, replyID uint64) error {
|
|
return r.db.Where("id = ? AND admin_user_id = ?", replyID, adminID).
|
|
Delete(&model.ChatQuickReply{}).Error
|
|
}
|
|
|
|
// GetAutoWelcomeMessage 获取建群自动话术
|
|
func (r *Repository) GetAutoWelcomeMessage() string {
|
|
var cfg model.SystemConfig
|
|
if err := r.db.Where("`key` = ?", "chat.auto_welcome_message").First(&cfg).Error; err != nil {
|
|
return "欢迎加入订单群聊！如有任何问题，请随时沟通。"
|
|
}
|
|
return cfg.Value
|
|
}
|
|
|
|
// UpdateAutoWelcomeMessage 更新建群自动话术
|
|
func (r *Repository) UpdateAutoWelcomeMessage(message string) error {
|
|
return r.db.Model(&model.SystemConfig{}).
|
|
Where("`key` = ?", "chat.auto_welcome_message").
|
|
Update("value", message).Error
|
|
}
|
|
|
|
func decodeStringList(raw datatypes.JSON) []string {
|
|
if len(raw) == 0 {
|
|
return []string{}
|
|
}
|
|
var items []string
|
|
if err := json.Unmarshal(raw, &items); err != nil {
|
|
return []string{}
|
|
}
|
|
return items
|
|
}
|