Add metrics for mobile versions snapshots (#28191)

* Add metrics for mobile versions snapshots

* Add notifications disabled and fix lint

* Address feedback

* Verify all references to JobTypeActiveUsers

* Fix typos

* Improve platform values

* Add test and MySQL support

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

@@ -121,6 +121,36 @@ func (_m *SessionStore) GetLRUSessions(c request.CTX, userID string, limit uint6
 	return r0, r1
 }
 
+// GetMobileSessionMetadata provides a mock function with given fields:
+func (_m *SessionStore) GetMobileSessionMetadata() ([]*model.MobileSessionMetadata, error) {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for GetMobileSessionMetadata")
+	}
+
+	var r0 []*model.MobileSessionMetadata
+	var r1 error
+	if rf, ok := ret.Get(0).(func() ([]*model.MobileSessionMetadata, error)); ok {
+		return rf()
+	}
+	if rf, ok := ret.Get(0).(func() []*model.MobileSessionMetadata); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*model.MobileSessionMetadata)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // GetSessions provides a mock function with given fields: c, userID
 func (_m *SessionStore) GetSessions(c request.CTX, userID string) ([]*model.Session, error) {
 	ret := _m.Called(c, userID)

server/channels/store/storetest/session_store.go

@@ -38,6 +38,7 @@ func TestSessionStore(t *testing.T, rctx request.CTX, ss store.Store) {
 	t.Run("GetSessionsExpired", func(t *testing.T) { testGetSessionsExpired(t, rctx, ss) })
 	t.Run("UpdateExpiredNotify", func(t *testing.T) { testUpdateExpiredNotify(t, rctx, ss) })
 	t.Run("GetLRUSessions", func(t *testing.T) { testGetLRUSessions(t, rctx, ss) })
+	t.Run("GetMobileSessionMetadata", func(t *testing.T) { testGetMobileSessionMetadata(t, rctx, ss) })
 }
 
 func testSessionStoreSave(t *testing.T, rctx request.CTX, ss store.Store) {
@@ -456,3 +457,84 @@ func testGetLRUSessions(t *testing.T, rctx request.CTX, ss store.Store) {
 	require.Equal(t, s2.Id, sessions[1].Id)
 	require.Equal(t, s1.Id, sessions[2].Id)
 }
+
+func testGetMobileSessionMetadata(t *testing.T, rctx request.CTX, ss store.Store) {
+	userId1 := model.NewId()
+	userId2 := model.NewId()
+	userId3 := model.NewId()
+	userId4 := model.NewId()
+	userId5 := model.NewId()
+
+	// Clear existing sessions.
+	err := ss.Session().RemoveAllSessions()
+	require.NoError(t, err)
+
+	s1 := &model.Session{}
+	s1.UserId = userId1
+	s1.ExpiresAt = model.GetMillis() + 10000
+
+	_, err = ss.Session().Save(rctx, s1)
+	require.NoError(t, err)
+
+	s2 := &model.Session{}
+	s2.UserId = userId2
+	s2.DeviceId = "android:" + model.NewId()
+	s2.ExpiresAt = model.GetMillis() + 10000
+	s2.Props = model.StringMap{
+		model.SessionPropDeviceNotificationDisabled: "false",
+		model.SessionPropMobileVersion:              "1.2.3",
+	}
+
+	_, err = ss.Session().Save(rctx, s2)
+	require.NoError(t, err)
+
+	s3 := &model.Session{}
+	s3.UserId = userId3
+	s3.DeviceId = "ios:" + model.NewId()
+	s3.ExpiresAt = model.GetMillis() + 10000
+	s3.Props = model.StringMap{
+		model.SessionPropDeviceNotificationDisabled: "true",
+		model.SessionPropMobileVersion:              "1.2.3",
+	}
+
+	_, err = ss.Session().Save(rctx, s3)
+	require.NoError(t, err)
+
+	s4 := &model.Session{}
+	s4.UserId = userId4
+	s4.DeviceId = "android:" + model.NewId()
+	s4.ExpiresAt = model.GetMillis() + 10000
+	s4.Props = model.StringMap{
+		model.SessionPropDeviceNotificationDisabled: "true",
+		model.SessionPropMobileVersion:              "3.2.1",
+	}
+
+	_, err = ss.Session().Save(rctx, s4)
+	require.NoError(t, err)
+
+	s5 := &model.Session{}
+	s5.UserId = userId5
+	s5.DeviceId = "android:" + model.NewId()
+	s5.ExpiresAt = model.GetMillis() + 10000
+	s5.Props = model.StringMap{
+		model.SessionPropDeviceNotificationDisabled: "true",
+		model.SessionPropMobileVersion:              "3.2.1",
+	}
+
+	_, err = ss.Session().Save(rctx, s5)
+	require.NoError(t, err)
+
+	metadata, err := ss.Session().GetMobileSessionMetadata()
+	require.NoError(t, err)
+	require.Len(t, metadata, 4)
+	found := false
+	for _, d := range metadata {
+		if d.NotificationDisabled == "true" &&
+			d.Platform == "android" &&
+			d.Version == "3.2.1" {
+			found = true
+			require.Equal(t, float64(2), d.Count)
+		}
+	}
+	require.True(t, found)
+}