adamsaghy commented on code in PR #3195: URL: https://github.com/apache/fineract/pull/3195#discussion_r1201951103
########## fineract-investor/src/main/java/org/apache/fineract/investor/service/ExternalAssetOwnersWriteServiceImpl.java: ########## @@ -0,0 +1,229 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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. + */ +package org.apache.fineract.investor.service; + +import com.google.gson.JsonElement; +import com.google.gson.reflect.TypeToken; +import java.lang.reflect.Type; +import java.time.LocalDate; +import java.util.Arrays; +import java.util.HashSet; +import java.util.Map; +import java.util.Objects; +import java.util.Optional; +import java.util.Set; +import lombok.RequiredArgsConstructor; +import org.apache.fineract.infrastructure.core.domain.ExternalId; +import org.apache.fineract.infrastructure.core.serialization.FromJsonHelper; +import org.apache.fineract.infrastructure.core.serialization.JsonParserHelper; +import org.apache.fineract.infrastructure.core.service.ThreadLocalContextUtil; +import org.apache.fineract.investor.data.ExternalTransferChangedData; +import org.apache.fineract.investor.data.ExternalTransferRequestParameters; +import org.apache.fineract.investor.data.ExternalTransferResponseData; +import org.apache.fineract.investor.data.ExternalTransferStatus; +import org.apache.fineract.investor.domain.ExternalAssetOwner; +import org.apache.fineract.investor.domain.ExternalAssetOwnerRepository; +import org.apache.fineract.investor.domain.ExternalAssetOwnerTransfer; +import org.apache.fineract.investor.domain.ExternalAssetOwnerTransferRepository; +import org.apache.fineract.investor.exception.ExternalAssetOwnerInitiateTransferException; +import org.apache.fineract.portfolio.loanaccount.service.LoanReadPlatformServiceCommon; +import org.springframework.stereotype.Service; +import org.springframework.transaction.annotation.Transactional; + +@Service +@RequiredArgsConstructor +public class ExternalAssetOwnersWriteServiceImpl implements ExternalAssetOwnersWriteService { + + private final ExternalAssetOwnerTransferRepository externalAssetOwnerTransferRepository; + private final ExternalAssetOwnerRepository externalAssetOwnerRepository; + private final FromJsonHelper fromApiJsonHelper; + private final LoanReadPlatformServiceCommon loanReadPlatformService; + + @Override + @Transactional + public ExternalTransferResponseData saleLoanByLoanId(Long loanId, String apiRequestBodyAsJson) { + ExternalAssetOwnerTransfer externalAssetOwnerTransfer = parseJson(loanId, apiRequestBodyAsJson, null); + validateSale(externalAssetOwnerTransfer); + ExternalAssetOwnerTransfer savedExternalAssetOwnerTransfer = externalAssetOwnerTransferRepository.save(externalAssetOwnerTransfer); + return buildResponseData(savedExternalAssetOwnerTransfer, apiRequestBodyAsJson); + } + + @Override + @Transactional + public ExternalTransferResponseData saleLoanByExternalLoanId(ExternalId externalLoanId, String apiRequestBodyAsJson) { + ExternalAssetOwnerTransfer externalAssetOwnerTransfer = parseJson(null, apiRequestBodyAsJson, externalLoanId); + validateSale(externalAssetOwnerTransfer); + ExternalAssetOwnerTransfer savedExternalAssetOwnerTransfer = externalAssetOwnerTransferRepository.save(externalAssetOwnerTransfer); + return buildResponseData(savedExternalAssetOwnerTransfer, apiRequestBodyAsJson); + } + + @Override + @Transactional + public ExternalTransferResponseData buyBackLoanByLoanId(Long loanId, String apiRequestBodyAsJson) { + ExternalAssetOwnerTransfer externalAssetOwnerTransfer = parseJson(loanId, apiRequestBodyAsJson, null); + validateBuyBack(externalAssetOwnerTransfer); + ExternalAssetOwnerTransfer savedExternalAssetOwnerTransfer = externalAssetOwnerTransferRepository.save(externalAssetOwnerTransfer); + return buildResponseData(savedExternalAssetOwnerTransfer, apiRequestBodyAsJson); + } + + @Override + @Transactional + public ExternalTransferResponseData buyBackLoanByExternalLoanId(ExternalId externalLoanId, String apiRequestBodyAsJson) { + ExternalAssetOwnerTransfer externalAssetOwnerTransfer = parseJson(null, apiRequestBodyAsJson, externalLoanId); + validateBuyBack(externalAssetOwnerTransfer); + ExternalAssetOwnerTransfer savedExternalAssetOwnerTransfer = externalAssetOwnerTransferRepository.save(externalAssetOwnerTransfer); + return buildResponseData(savedExternalAssetOwnerTransfer, apiRequestBodyAsJson); + } + + private ExternalTransferResponseData buildResponseData(ExternalAssetOwnerTransfer savedExternalAssetOwnerTransfer, + String apiRequestBodyAsJson) { + final JsonElement json = fromApiJsonHelper.parse(apiRequestBodyAsJson); + ExternalTransferResponseData responseData = new ExternalTransferResponseData(); + responseData.setResourceId(savedExternalAssetOwnerTransfer.getId()); + responseData.setResourceExternalId(savedExternalAssetOwnerTransfer.getExternalId().getValue()); + responseData.setSubResourceId(savedExternalAssetOwnerTransfer.getLoanId()); + responseData.setSubResourceExternalId(Objects.isNull(savedExternalAssetOwnerTransfer.getExternalLoanId()) ? null + : savedExternalAssetOwnerTransfer.getExternalLoanId().getValue()); + ExternalTransferChangedData changedData = new ExternalTransferChangedData(); + changedData.setSettlementDate(savedExternalAssetOwnerTransfer.getSettlementDate()); + changedData.setOwnerExternalId(savedExternalAssetOwnerTransfer.getOwner().getExternalId().getValue()); + changedData.setTransferExternalId(savedExternalAssetOwnerTransfer.getExternalId().getValue()); + changedData.setPurchasePriceRatio(savedExternalAssetOwnerTransfer.getPurchasePriceRatio()); + responseData.setChanges(changedData); + responseData.setDateformat(fromApiJsonHelper.extractStringNamed(ExternalTransferRequestParameters.DATEFORMAT, json)); + responseData.setLocale(fromApiJsonHelper.extractStringNamed(ExternalTransferRequestParameters.LOCALE, json)); + return responseData; + } + + private void validateSale(ExternalAssetOwnerTransfer externalAssetOwnerTransfer) { + validateSettlementDate(externalAssetOwnerTransfer); + validateTransferStatusForSale(externalAssetOwnerTransfer); + validateLoanStatus(externalAssetOwnerTransfer); + } + + private void validateBuyBack(ExternalAssetOwnerTransfer externalAssetOwnerTransfer) { + validateSettlementDate(externalAssetOwnerTransfer); + validateTransferStatusForBuyBack(externalAssetOwnerTransfer); + } + + private void validateSettlementDate(ExternalAssetOwnerTransfer externalAssetOwnerTransfer) { + if (externalAssetOwnerTransfer.getSettlementDate().isBefore(ThreadLocalContextUtil.getBusinessDate())) { + throw new ExternalAssetOwnerInitiateTransferException("Settlement date cannot be in the past"); + } + } + + private void validateLoanStatus(ExternalAssetOwnerTransfer externalAssetOwnerTransfer) { + if (!Objects.isNull(externalAssetOwnerTransfer.getLoanId()) + && !loanReadPlatformService.isLoanTransferable(externalAssetOwnerTransfer.getLoanId())) { + throw new ExternalAssetOwnerInitiateTransferException("Loan is not in active status"); + } else if (!Objects.isNull(externalAssetOwnerTransfer.getExternalLoanId()) + && loanReadPlatformService.isLoanTransferable(externalAssetOwnerTransfer.getExternalLoanId())) { + throw new ExternalAssetOwnerInitiateTransferException("Loan is not in active status"); + } + } + + private void validateTransferStatusForSale(ExternalAssetOwnerTransfer externalAssetOwnerTransfer) { + Optional<ExternalAssetOwnerTransfer> latestTransferOptional = externalAssetOwnerTransferRepository + .findLatestByLoanIdOrExternalLoanId(externalAssetOwnerTransfer.getLoanId(), externalAssetOwnerTransfer.getExternalLoanId()); + if (latestTransferOptional.isPresent()) { + ExternalAssetOwnerTransfer latestTransfer = latestTransferOptional.get(); + ExternalTransferStatus latestTransferStatus = ExternalTransferStatus.valueOf(latestTransfer.getStatus()); Review Comment: what if it is BUYBACK but the BUYBACK settlement date is later than the new SALE? 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