add: chat service

app/chat/rpc/internal/logic/removeParticipantLogic.go

@@ -0,0 +1,47 @@
+package logic
+
+import (
+	"context"
+	"errors"
+
+	"juwan-backend/app/chat/rpc/internal/svc"
+	"juwan-backend/app/chat/rpc/pb"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type RemoveParticipantLogic struct {
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+	logx.Logger
+}
+
+func NewRemoveParticipantLogic(ctx context.Context, svcCtx *svc.ServiceContext) *RemoveParticipantLogic {
+	return &RemoveParticipantLogic{
+		ctx:    ctx,
+		svcCtx: svcCtx,
+		Logger: logx.WithContext(ctx),
+	}
+}
+
+func (l *RemoveParticipantLogic) RemoveParticipant(in *pb.RemoveParticipantReq) (*pb.RemoveParticipantResp, error) {
+	store := l.svcCtx.Store
+	store.Mu.Lock()
+	defer store.Mu.Unlock()
+
+	session, ok := store.Sessions[in.GetSessionId()]
+	if !ok {
+		return nil, errors.New("session not found")
+	}
+
+	filtered := make([]int64, 0, len(session.Participants))
+	for _, p := range session.Participants {
+		if p != in.GetUserId() {
+			filtered = append(filtered, p)
+		}
+	}
+	session.Participants = filtered
+	session.UpdatedAt = nowUnix(0)
+
+	return &pb.RemoveParticipantResp{}, nil
+}