completed initial scaffolding for services

src/main/java/zw/qantra/tm/domain/controllers/ConfirmationController.java

@@ -6,13 +6,17 @@ import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
+import zw.qantra.tm.domain.models.Transaction;
+import zw.qantra.tm.domain.services.TransactionService;
 
 @RestController
 @RequestMapping("/confirm/transaction")
 @RequiredArgsConstructor
 public class ConfirmationController {
+    private final TransactionService transactionService;
+
     @PostMapping()
-    public ResponseEntity post(@RequestBody Object transactionRequest) {
-        return ResponseEntity.ok("Transaction endpoint is working");
+    public ResponseEntity post(@RequestBody Transaction transaction) {
+        return ResponseEntity.ok(transactionService.execute(transaction));
     }
 }

src/main/java/zw/qantra/tm/domain/enums/ChargeConditionType.java

@@ -0,0 +1,7 @@
+package zw.qantra.tm.domain.enums;
+
+public enum ChargeConditionType {
+    PROVIDER, // bill provider conditions
+    GATEWAY, // payment gateway conditions
+    TRANSACTION // qantra conditions
+}

src/main/java/zw/qantra/tm/domain/enums/ChargeLabelEnum.java

@@ -0,0 +1,7 @@
+package zw.qantra.tm.domain.enums;
+
+public enum ChargeLabelEnum {
+    FEE,
+    TAX,
+    GATEWAY_FEE
+}

src/main/java/zw/qantra/tm/domain/enums/CurrencyType.java

@@ -0,0 +1,9 @@
+package zw.qantra.tm.domain.enums;
+
+public enum CurrencyType {
+    ZWL,
+    ZWG,
+    USD,
+    ZiG,
+    ZAR
+}

src/main/java/zw/qantra/tm/domain/enums/Status.java

@@ -0,0 +1,9 @@
+package zw.qantra.tm.domain.enums;
+
+public enum Status {
+    SUCCESS,
+    PENDING,
+    FAILED,
+    CANCELLED,
+    REVERSED
+}

src/main/java/zw/qantra/tm/domain/enums/TargetEvent.java

@@ -0,0 +1,6 @@
+package zw.qantra.tm.domain.enums;
+
+public enum TargetEvent {
+    INCLUDE,
+    EXCLUDE
+}

src/main/java/zw/qantra/tm/domain/models/Charge.java

@@ -0,0 +1,67 @@
+package zw.qantra.tm.domain.models;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import jakarta.persistence.*;
+import lombok.*;
+import zw.qantra.tm.domain.enums.ChargeLabelEnum;
+import zw.qantra.tm.domain.enums.CurrencyType;
+import zw.qantra.tm.domain.enums.TargetEvent;
+
+import java.math.BigDecimal;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+@Entity
+@Getter
+@Setter
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class Charge {
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+
+    private String description;
+
+    // % rate to charge
+    private BigDecimal percentageRate;
+    private BigDecimal flat;
+    private boolean composite; // composite is % plus flat
+    private boolean global;
+
+    private BigDecimal min;
+    private BigDecimal max;
+    private BigDecimal minimumAmount;
+    private BigDecimal maximumAmount;
+
+    @Enumerated(EnumType.STRING)
+    private ChargeLabelEnum chargeLabel;
+    @Enumerated(EnumType.STRING)
+    private CurrencyType currency;
+    private String account;
+    private String target;
+    private String targetValue;
+    @Enumerated(EnumType.STRING)
+    private TargetEvent targetEvent; // include / exclude
+
+    @JsonIgnore
+    @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
+    @JoinTable(
+            name = "charge_include_products",
+            joinColumns = @JoinColumn(name = "charge_id"),
+            inverseJoinColumns = @JoinColumn(name = "charge_condition_id")
+    )
+    private Set<ChargeCondition> includes = new HashSet<>();
+
+    @JsonIgnore
+    @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
+    @JoinTable(
+            name = "charge_exclude_products",
+            joinColumns = @JoinColumn(name = "charge_id"),
+            inverseJoinColumns = @JoinColumn(name = "charge_condition_id")
+    )
+    private Set<ChargeCondition> excludes = new HashSet<>();
+
+}

src/main/java/zw/qantra/tm/domain/models/ChargeCondition.java

@@ -0,0 +1,31 @@
+package zw.qantra.tm.domain.models;
+
+import jakarta.persistence.*;
+import lombok.*;
+import zw.qantra.tm.domain.enums.ChargeConditionType;
+
+import java.util.List;
+import java.util.UUID;
+
+@Entity
+@Getter
+@Setter
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class ChargeCondition {
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private UUID id;
+
+    private String name;
+    @Enumerated(EnumType.STRING)
+    private ChargeConditionType type;
+    @Column(columnDefinition = "longtext")
+    private String codes;
+
+    @ManyToMany(mappedBy = "includes")
+    List<Charge> includeCharges;
+    @ManyToMany(mappedBy = "excludes")
+    List<Charge> excludeCharges;
+}

src/main/java/zw/qantra/tm/domain/models/ConfirmTransaction.java

@@ -1,52 +0,0 @@
-package zw.qantra.tm.domain.models;
-
-import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Id;
-import lombok.*;
-import zw.qantra.tm.domain.enums.RequestType;
-
-import java.math.BigDecimal;
-import java.util.UUID;
-
-@Entity
-@Getter
-@Setter
-@Builder
-@AllArgsConstructor
-@NoArgsConstructor
-public class ConfirmTransaction {
-    @Id
-    @GeneratedValue(strategy = GenerationType.UUID)
-    private UUID id;
-    
-    private String trace;
-    private BigDecimal amount;
-    private String reference;
-    private String providerUid;
-    private String productUid;
-    private String paymentProcessorLabel;
-    private String integrationProcessorLabel;
-    private String rrn;
-    private String channelName;
-    private String channel;
-    private String debitPhone;
-    private String debitAccount;
-    private String debitCurrency;
-    private String debitName;
-    private String debitCard;
-    private String debitRef;
-    private String creditPhone;
-    private String creditAccount;
-    private String creditCurrency;
-    private String creditName;
-    private String creditCard;
-    private String creditRef;
-    private String billClientId;
-    private String clientSecret;
-    private String aggregatorId;
-    private String billName;
-    private String billProductName;
-    private RequestType type;
-}

src/main/java/zw/qantra/tm/domain/models/Transaction.java

@@ -1,10 +1,14 @@
 package zw.qantra.tm.domain.models;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import jakarta.persistence.*;
 import lombok.*;
+import zw.qantra.tm.domain.enums.CurrencyType;
 import zw.qantra.tm.domain.enums.RequestType;
+import zw.qantra.tm.domain.enums.Status;
 
 import java.math.BigDecimal;
+import java.util.List;
 import java.util.UUID;
 
 @Entity
@@ -13,6 +17,7 @@ import java.util.UUID;
 @Builder
 @AllArgsConstructor
 @NoArgsConstructor
+@JsonInclude(JsonInclude.Include.NON_NULL)
 public class Transaction {
     @Id
     @GeneratedValue(strategy = GenerationType.UUID)
@@ -20,6 +25,10 @@ public class Transaction {
 
     private String trace;
     private BigDecimal amount;
+    private BigDecimal charge;
+    private BigDecimal gatewayCharge;
+    private BigDecimal tax;
+    private BigDecimal totalAmount;
     private String reference;
     private String providerUid;
     private String productUid;
@@ -30,13 +39,13 @@ public class Transaction {
     private String channel;
     private String debitPhone;
     private String debitAccount;
-    private String debitCurrency;
+    private CurrencyType debitCurrency;
     private String debitName;
     private String debitCard;
     private String debitRef;
     private String creditPhone;
     private String creditAccount;
-    private String creditCurrency;
+    private CurrencyType creditCurrency;
     private String creditName;
     private String creditCard;
     private String creditRef;
@@ -46,4 +55,11 @@ public class Transaction {
     private String billName;
     private String billProductName;
     private RequestType type;
+    
+    private String errorMessage;
+    private String responseCode;
+    private Status status;
+    @Transient
+    private List<Object> additionalData;
+
 }

src/main/java/zw/qantra/tm/domain/repositories/ConfirmTransactionRepository.java

@@ -1,11 +0,0 @@
-package zw.qantra.tm.domain.repositories;
-
-import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.stereotype.Repository;
-import zw.qantra.tm.domain.models.ConfirmTransaction;
-
-import java.util.UUID;
-
-@Repository
-public interface ConfirmTransactionRepository extends JpaRepository<ConfirmTransaction, UUID> {
-} 

src/main/java/zw/qantra/tm/domain/services/ConfirmTransactionService.java

@@ -1,11 +0,0 @@
-package zw.qantra.tm.domain.services;
-
-import lombok.RequiredArgsConstructor;
-import org.springframework.stereotype.Service;
-import zw.qantra.tm.domain.repositories.ConfirmTransactionRepository;
-
-@Service
-@RequiredArgsConstructor
-public class ConfirmTransactionService {
-    private final ConfirmTransactionRepository confirmTransactionRepository;
-}

src/main/java/zw/qantra/tm/domain/services/TransactionService.java

@@ -2,10 +2,15 @@ package zw.qantra.tm.domain.services;
 
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
+import zw.qantra.tm.domain.enums.Status;
 import zw.qantra.tm.domain.models.PaymentProcessor;
 import zw.qantra.tm.domain.models.Transaction;
 import zw.qantra.tm.domain.repositories.TransactionRepository;
 import zw.qantra.tm.domain.services.factories.PaymentProcessorFactory;
+import zw.qantra.tm.domain.services.processors.TransactionProcessorInterface;
+import zw.qantra.tm.domain.services.processors.handlers.CalculateChargesHandler;
+import zw.qantra.tm.domain.services.processors.handlers.LogicPipeline;
+import zw.qantra.tm.domain.services.processors.handlers.ValidationHandler;
 
 @Service
 @RequiredArgsConstructor
@@ -13,9 +18,26 @@ public class TransactionService {
     private final TransactionRepository transactionRepository;
     private final PaymentProcessorFactory paymentProcessorFactory;
 
-    private Transaction bootstrap(Transaction transaction) {
-        String label = transaction.getType() + "_" + transaction.getPaymentProcessorLabel();
-//        PaymentProcessor paymentProcessor = paymentProcessorFactory.getPaymentProcessor(label);
+    public Transaction execute(Transaction transaction) {
+        LogicPipeline<Transaction, Transaction> transactionLogic =
+                new LogicPipeline<>(new CalculateChargesHandler())
+                        .addHandler(new ValidationHandler());
+        transaction = transactionLogic.execute(transaction);
+
+        String label = transaction.getType() + "_" + transaction.getIntegrationProcessorLabel();
+        TransactionProcessorInterface transactionProcessorInterface =
+                (TransactionProcessorInterface) paymentProcessorFactory.getPaymentProcessor(label);
+
+        try {
+            transactionProcessorInterface.process(transaction);
+        }catch (Exception e){
+            e.printStackTrace();
+            transaction.setStatus(Status.FAILED);
+            transaction.setResponseCode("01");
+            transaction.setErrorMessage(e.getMessage());
+            transactionRepository.save(transaction);
+            return transaction;
+        }
         return transaction;
     }
 }

src/main/java/zw/qantra/tm/domain/services/factories/PaymentProcessorFactory.java

@@ -9,6 +9,7 @@ import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.stereotype.Component;
+import zw.qantra.tm.exceptions.ApiException;
 
 @Component
 @RequiredArgsConstructor
@@ -28,11 +29,13 @@ public class PaymentProcessorFactory implements ApplicationContextAware {
         try {
             paymentProcessor = applicationContext.getBean(paymentProcessorName);
         } catch (NoSuchBeanDefinitionException exception) {
+            exception.printStackTrace();
             logger.error("Couldn't find payment processor: {}", exception.getMessage());
-            return null;
+            throw new ApiException("Couldn't find payment processor");
         } catch (BeansException e) {
+            e.printStackTrace();
             logger.error("Error retrieving payment processor bean: {}", e.getMessage());
-            return null;
+            throw new ApiException("Error retrieving payment processor bean");
         }
 
         return paymentProcessor;

src/main/java/zw/qantra/tm/domain/services/processors/TransactionProcessorInterface.java

@@ -3,6 +3,6 @@ package zw.qantra.tm.domain.services.processors;
 import zw.qantra.tm.domain.models.Transaction;
 
 public interface TransactionProcessorInterface {
-    Object process(Transaction transaction);
+    Object process(Transaction transaction) throws Exception;
     Object reverse(Transaction transaction);
 }

src/main/java/zw/qantra/tm/domain/services/processors/confirmations/ZesaConfirmationProcessor.java

@@ -1,21 +1,25 @@
 package zw.qantra.tm.domain.services.processors.confirmations;
 
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 import zw.qantra.tm.domain.models.Transaction;
 import zw.qantra.tm.domain.services.processors.TransactionProcessorInterface;
 import zw.qantra.tm.rest.RestService;
 
-@Service("CONFIRM_POWERTEL_ZESA")
+@Service("CONFIRM_ZESA")
 @RequiredArgsConstructor
 public class ZesaConfirmationProcessor implements TransactionProcessorInterface {
     private final RestService restService;
 
+    @Value("${sbz.aggregator.url}")
+    private String aggregatorUrl;
 
     @Override
-    public Object process(Transaction transaction) {
-
-        return transaction;
+    public Object process(Transaction transaction) throws Exception {
+        System.out.println("processing transaction");
+        throw new Exception("Challenge encountered, please contact support.");
+//        return transaction;
     }
 
     @Override

src/main/java/zw/qantra/tm/domain/services/processors/handlers/CalculateChargesHandler.java

@@ -0,0 +1,11 @@
+package zw.qantra.tm.domain.services.processors.handlers;
+
+import zw.qantra.tm.domain.models.Transaction;
+
+public class CalculateChargesHandler implements LogicHandler<Transaction, Transaction> {
+    @Override
+    public Transaction process(Transaction transaction) {
+        System.out.println("processing charges");
+        return transaction;
+    }
+}

src/main/java/zw/qantra/tm/domain/services/processors/handlers/LogicHandler.java

@@ -0,0 +1,5 @@
+package zw.qantra.tm.domain.services.processors.handlers;
+
+interface LogicHandler<I, O> {
+    O process(I input);
+}

src/main/java/zw/qantra/tm/domain/services/processors/handlers/LogicPipeline.java

@@ -0,0 +1,20 @@
+package zw.qantra.tm.domain.services.processors.handlers;
+
+import org.springframework.stereotype.Service;
+
+public class LogicPipeline<I, O> {
+
+    private final LogicHandler<I, O> currentHandler;
+
+    public LogicPipeline(LogicHandler<I, O> currentHandler) {
+        this.currentHandler = currentHandler;
+    }
+
+    public <K> LogicPipeline<I, K> addHandler(LogicHandler<O, K> newHandler) {
+        return new LogicPipeline<>(input -> newHandler.process(currentHandler.process(input)));
+    }
+
+    public O execute(I input) {
+        return currentHandler.process(input);
+    }
+}

src/main/java/zw/qantra/tm/domain/services/processors/handlers/ValidationHandler.java

@@ -0,0 +1,11 @@
+package zw.qantra.tm.domain.services.processors.handlers;
+
+import zw.qantra.tm.domain.models.Transaction;
+
+public class ValidationHandler implements LogicHandler<Transaction, Transaction> {
+    @Override
+    public Transaction process(Transaction transaction) {
+        System.out.println("processing validation");
+        return transaction;
+    }
+}

src/main/java/zw/qantra/tm/domain/services/processors/integrations/ZesaIntegrationProcessor.java

@@ -0,0 +1,28 @@
+package zw.qantra.tm.domain.services.processors.integrations;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import zw.qantra.tm.domain.models.Transaction;
+import zw.qantra.tm.domain.services.processors.TransactionProcessorInterface;
+import zw.qantra.tm.rest.RestService;
+
+@Service("REQUEST_ZESA")
+@RequiredArgsConstructor
+public class ZesaIntegrationProcessor implements TransactionProcessorInterface {
+    private final RestService restService;
+
+    @Value("${sbz.aggregator.url}")
+    private String aggregatorUrl;
+
+    @Override
+    public Object process(Transaction transaction) throws Exception {
+
+        return transaction;
+    }
+
+    @Override
+    public Object reverse(Transaction transaction) {
+        return transaction;
+    }
+}

src/main/java/zw/qantra/tm/domain/services/processors/payments/StewardWebPaymentProcessor.java

@@ -0,0 +1,24 @@
+package zw.qantra.tm.domain.services.processors.payments;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import zw.qantra.tm.domain.models.Transaction;
+import zw.qantra.tm.domain.services.processors.TransactionProcessorInterface;
+import zw.qantra.tm.rest.RestService;
+
+@Service("STEWARD_WEB")
+@RequiredArgsConstructor
+public class StewardWebPaymentProcessor implements TransactionProcessorInterface {
+    private final RestService restService;
+
+
+    @Override
+    public Object process(Transaction transaction) throws Exception {
+        return transaction;
+    }
+
+    @Override
+    public Object reverse(Transaction transaction) {
+        return transaction;
+    }
+}

src/main/resources/application-lab.properties

@@ -12,3 +12,5 @@ spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
 spring.datasource.url=jdbc:mysql://localhost:3306/qpay?useLegacyDatetimeCode=false
 spring.datasource.username=root
 spring.datasource.password=password
+
+sbz.aggregator.url=http://192.168.16.29:24050/v1

src/main/resources/application.properties

@@ -1,5 +1,8 @@
 spring.application.name=tm
 debug=true
+
+server.servlet.context-path=/api
+
 logging.level.root=INFO
 logging.level.org.springframework.boot.autoconfigure=INFO
 
@@ -12,3 +15,5 @@ spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
 spring.datasource.url=jdbc:mysql://localhost:3306/qpay?useLegacyDatetimeCode=false
 spring.datasource.username=root
 spring.datasource.password=password
+
+sbz.aggregator.url=http://192.168.16.29:24050/v1