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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.impl
import arrow.core.Either
import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
import org.onap.dcae.collectors.veshv.domain.headerRequiredFieldDescriptors
import org.onap.dcae.collectors.veshv.domain.vesEventListenerVersionRegex
import org.onap.dcae.collectors.veshv.model.VesMessage
import org.onap.ves.VesEventOuterClass.CommonEventHeader
typealias ValidationFailMessage = () -> String
typealias ValidationSuccessMessage = () -> String
typealias ValidationResult = Either<ValidationFailMessage, ValidationSuccessMessage>
internal object MessageValidator {
fun validateFrameMessage(message: WireFrameMessage): ValidationResult =
message.validate().fold({
Either.left { "Invalid wire frame header, reason: ${it.message}" }
}, {
Either.right { "Wire frame header is valid" }
})
fun validateProtobufMessage(message: VesMessage): ValidationResult =
if (message.isValid()) {
Either.right { "Protocol buffers message is valid" }
} else {
Either.left { "Unsupported protocol buffers message." }
}
fun VesMessage.isValid() = allMandatoryFieldsArePresent(this.header)
.and(vesEventListenerVersionRegex.matches(header.vesEventListenerVersion))
private fun allMandatoryFieldsArePresent(header: CommonEventHeader) =
headerRequiredFieldDescriptors
.all { fieldDescriptor -> header.hasField(fieldDescriptor) }
}
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