feat: sync public links and phone change updates

internal/store/memory/phone_change.go

@@ -0,0 +1,72 @@
+package memory
+
+import (
+	"context"
+	"time"
+
+	"telesrv/internal/domain"
+	"telesrv/internal/store"
+)
+
+// PhoneChangeStore 是测试用内存实现。用户唯一性在 UserStore 锁内维护；事件写入
+// 共享 UpdateEventStore 后可由 updates.getDifference 重放。
+type PhoneChangeStore struct {
+	users  *UserStore
+	events store.UpdateEventStore
+}
+
+func NewPhoneChangeStore(users *UserStore, events store.UpdateEventStore) *PhoneChangeStore {
+	return &PhoneChangeStore{users: users, events: events}
+}
+
+func (*PhoneChangeStore) UsesReliableDispatch() bool { return false }
+
+func (s *PhoneChangeStore) ChangePhone(ctx context.Context, req domain.PhoneChangeRequest) (domain.PhoneChangeResult, error) {
+	if s == nil || s.users == nil || req.UserID == 0 || !domain.ValidPhone(req.Phone) {
+		return domain.PhoneChangeResult{}, domain.ErrPhoneNumberInvalid
+	}
+	s.users.mu.Lock()
+	u, ok := s.users.byID[req.UserID]
+	if !ok {
+		s.users.mu.Unlock()
+		return domain.PhoneChangeResult{}, domain.ErrUserNotFound
+	}
+	if u.Phone == req.Phone {
+		s.users.mu.Unlock()
+		return domain.PhoneChangeResult{User: u}, nil
+	}
+	for id, existing := range s.users.byID {
+		if id != req.UserID && existing.Phone == req.Phone {
+			s.users.mu.Unlock()
+			return domain.PhoneChangeResult{}, domain.ErrPhoneNumberOccupied
+		}
+	}
+	currentPhone := u.Phone
+	u.Phone = req.Phone
+	s.users.byID[req.UserID] = u
+
+	date := req.Date
+	if date == 0 {
+		date = int(time.Now().Unix())
+	}
+	event := domain.UpdateEvent{
+		UserID:   req.UserID,
+		Type:     domain.UpdateEventUserPhone,
+		Date:     date,
+		Phone:    req.Phone,
+		PtsCount: 1,
+	}
+	if s.events != nil {
+		var err error
+		event, err = s.events.AppendAllocated(ctx, req.UserID, event)
+		if err != nil {
+			// 保持内存替身与 PG 的 user+event 原子可见语义。
+			u.Phone = currentPhone
+			s.users.byID[req.UserID] = u
+			s.users.mu.Unlock()
+			return domain.PhoneChangeResult{}, err
+		}
+	}
+	s.users.mu.Unlock()
+	return domain.PhoneChangeResult{User: u, Event: event, Changed: true}, nil
+}