XYZ-35: Added Support for GlobalRelay Compliance Export Format

* Added username to ChannelMemberHistory struct in anticipation of supporting GlobalRelay in Compliance Export
* Removed translation from debug output - this makes it complicated to use utils functions from tests in the enterprise repo
* Added an advanced email function that allows for greater control over message details. Updated MessageExport config to support GlobalRelay. Added attachment support to InBucket unit tests
* Moving templates in from enterprise to solve test issues
* Added export format to diagnostics
* Changed email attachment code to use FileBackend so that S3 storage is properly supported

model/config_test.go

@@ -136,7 +136,7 @@ func TestMessageExportSettingsIsValidBatchSizeInvalid(t *testing.T) {
 	require.Error(t, mes.isValid(*fs))
 }
 
-func TestMessageExportSettingsIsValid(t *testing.T) {
+func TestMessageExportSettingsIsValidExportFormatInvalid(t *testing.T) {
 	fs := &FileSettings{
 		DriverName: NewString("foo"), // bypass file location check
 	}
@@ -147,6 +147,55 @@ func TestMessageExportSettingsIsValid(t *testing.T) {
 		BatchSize:           NewInt(100),
 	}
 
+	// should fail fast because export format isn't set
+	require.Error(t, mes.isValid(*fs))
+}
+
+func TestMessageExportSettingsIsValidGlobalRelayEmailAddressInvalid(t *testing.T) {
+	fs := &FileSettings{
+		DriverName: NewString("foo"), // bypass file location check
+	}
+	mes := &MessageExportSettings{
+		EnableExport:        NewBool(true),
+		ExportFormat:        NewString(COMPLIANCE_EXPORT_TYPE_GLOBALRELAY),
+		ExportFromTimestamp: NewInt64(0),
+		DailyRunTime:        NewString("15:04"),
+		BatchSize:           NewInt(100),
+	}
+
+	// should fail fast because global relay email address isn't set
+	require.Error(t, mes.isValid(*fs))
+}
+
+func TestMessageExportSettingsIsValidActiance(t *testing.T) {
+	fs := &FileSettings{
+		DriverName: NewString("foo"), // bypass file location check
+	}
+	mes := &MessageExportSettings{
+		EnableExport:        NewBool(true),
+		ExportFormat:        NewString(COMPLIANCE_EXPORT_TYPE_ACTIANCE),
+		ExportFromTimestamp: NewInt64(0),
+		DailyRunTime:        NewString("15:04"),
+		BatchSize:           NewInt(100),
+	}
+
+	// should pass because everything is valid
+	require.Nil(t, mes.isValid(*fs))
+}
+
+func TestMessageExportSettingsIsValidGlobalRelay(t *testing.T) {
+	fs := &FileSettings{
+		DriverName: NewString("foo"), // bypass file location check
+	}
+	mes := &MessageExportSettings{
+		EnableExport:            NewBool(true),
+		ExportFormat:            NewString(COMPLIANCE_EXPORT_TYPE_GLOBALRELAY),
+		ExportFromTimestamp:     NewInt64(0),
+		DailyRunTime:            NewString("15:04"),
+		BatchSize:               NewInt(100),
+		GlobalRelayEmailAddress: NewString("test@mattermost.com"),
+	}
+
 	// should pass because everything is valid
 	require.Nil(t, mes.isValid(*fs))
 }
@@ -159,6 +208,7 @@ func TestMessageExportSetDefaults(t *testing.T) {
 	require.Equal(t, "01:00", *mes.DailyRunTime)
 	require.Equal(t, int64(0), *mes.ExportFromTimestamp)
 	require.Equal(t, 10000, *mes.BatchSize)
+	require.Equal(t, COMPLIANCE_EXPORT_TYPE_ACTIANCE, *mes.ExportFormat)
 }
 
 func TestMessageExportSetDefaultsExportEnabledExportFromTimestampNil(t *testing.T) {