MM-62751: [Shared Channels] Allow remote users to be discoverable in the create DM/GM modal (#30918)

server/channels/store/storetest/mocks/RemoteClusterStore.go

@@ -210,6 +210,24 @@ func (_m *RemoteClusterStore) Update(rc *model.RemoteCluster) (*model.RemoteClus
 	return r0, r1
 }
 
+// UpdateLastGlobalUserSyncAt provides a mock function with given fields: remoteID, syncAt
+func (_m *RemoteClusterStore) UpdateLastGlobalUserSyncAt(remoteID string, syncAt int64) error {
+	ret := _m.Called(remoteID, syncAt)
+
+	if len(ret) == 0 {
+		panic("no return value specified for UpdateLastGlobalUserSyncAt")
+	}
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(string, int64) error); ok {
+		r0 = rf(remoteID, syncAt)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
 // UpdateTopics provides a mock function with given fields: remoteClusterID, topics
 func (_m *RemoteClusterStore) UpdateTopics(remoteClusterID string, topics string) (*model.RemoteCluster, error) {
 	ret := _m.Called(remoteClusterID, topics)

server/channels/store/storetest/shared_channel_store.go

@@ -32,6 +32,7 @@ func TestSharedChannelStore(t *testing.T, rctx request.CTX, ss store.Store, s Sq
 	t.Run("HasRemote", func(t *testing.T) { testHasRemote(t, rctx, ss) })
 	t.Run("GetRemoteForUser", func(t *testing.T) { testGetRemoteForUser(t, rctx, ss) })
 	t.Run("UpdateSharedChannelRemoteNextSyncAt", func(t *testing.T) { testUpdateSharedChannelRemoteCursor(t, rctx, ss) })
+	t.Run("UpdateGlobalUserSyncCursor", func(t *testing.T) { testUpdateGlobalUserSyncCursor(t, rctx, ss) })
 	t.Run("DeleteSharedChannelRemote", func(t *testing.T) { testDeleteSharedChannelRemote(t, rctx, ss) })
 
 	t.Run("SaveSharedChannelUser", func(t *testing.T) { testSaveSharedChannelUser(t, rctx, ss) })
@@ -932,6 +933,38 @@ func testUpdateSharedChannelRemoteCursor(t *testing.T, rctx request.CTX, ss stor
 	})
 }
 
+func testUpdateGlobalUserSyncCursor(t *testing.T, rctx request.CTX, ss store.Store) {
+	// Create a remote cluster first
+	rc := &model.RemoteCluster{
+		RemoteId:  model.NewId(),
+		SiteURL:   "http://example.com",
+		CreatorId: model.NewId(),
+		Name:      "test",
+	}
+	rcSaved, err := ss.RemoteCluster().Save(rc)
+	require.NoError(t, err, "couldn't save remote cluster", err)
+
+	futureTimestamp := model.GetMillis() + 3600000 // 1 hour in the future
+
+	t.Run("Update global user sync cursor for remote", func(t *testing.T) {
+		err := ss.RemoteCluster().UpdateLastGlobalUserSyncAt(rcSaved.RemoteId, futureTimestamp)
+		require.NoError(t, err, "update global user sync cursor should not error", err)
+
+		// Verify that the LastGlobalUserSyncAt field was updated in the RemoteCluster table
+		// Small sleep to ensure the transaction is committed
+		time.Sleep(10 * time.Millisecond)
+		updatedRC, err := ss.RemoteCluster().Get(rcSaved.RemoteId, false)
+		require.NoError(t, err)
+		require.NotZero(t, updatedRC.LastGlobalUserSyncAt, "LastGlobalUserSyncAt should not be zero")
+		require.Equal(t, futureTimestamp, updatedRC.LastGlobalUserSyncAt)
+	})
+
+	t.Run("Update global user sync cursor for non-existent remote", func(t *testing.T) {
+		err := ss.RemoteCluster().UpdateLastGlobalUserSyncAt(model.NewId(), futureTimestamp)
+		require.Error(t, err, "update non-existent remote should error", err)
+	})
+}
+
 func testDeleteSharedChannelRemote(t *testing.T, rctx request.CTX, ss store.Store) {
 	channel, err := createTestChannel(ss, rctx, "test_remote_delete")
 	require.NoError(t, err)

server/channels/store/storetest/user_store.go

@@ -610,6 +610,32 @@ func testUserStoreGetAllProfiles(t *testing.T, rctx request.CTX, ss store.Store)
 		}, actual)
 	})
 
+	t.Run("filter by UpdatedAfter", func(t *testing.T) {
+		// Update a user to ensure we have a recent update time
+		updateTime := model.GetMillis()
+		u2.FirstName = "Updated"
+		_, updateErr := ss.User().Update(rctx, u2, false)
+		require.NoError(t, updateErr)
+
+		// Query with the UpdatedAfter filter
+		actual, userErr := ss.User().GetAllProfiles(&model.UserGetOptions{
+			Page:         0,
+			PerPage:      10,
+			UpdatedAfter: updateTime - 1, // Subtract 1 to ensure we capture the update
+		})
+		require.NoError(t, userErr)
+		require.Contains(t, actual, sanitized(u2), "User updated after the specified time should be in the results")
+
+		// Query with a future time, should return no results
+		actual, userErr = ss.User().GetAllProfiles(&model.UserGetOptions{
+			Page:         0,
+			PerPage:      10,
+			UpdatedAfter: updateTime + 10000, // Future time
+		})
+		require.NoError(t, userErr)
+		require.NotContains(t, actual, sanitized(u2), "Users updated before the specified future time should not be in the results")
+	})
+
 	u8, err := ss.User().Save(rctx, &model.User{
 		Email:    MakeEmail(),
 		Username: "u8" + model.NewId(),