Added file downloading

src/main/java/ru/nbch/credit_tracker/controller/SignalController.java

@@ -41,5 +41,10 @@ public class SignalController {
         return signalFacade.getReportList(username, packageName);
     }
 
+    @GetMapping(value = "/download", params = "file", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
+    public ResponseEntity<Resource> downloadFile(@RequestParam("file") String file) {
+        return signalFacade.downloadFile(file);
+    }
+
 }
 

src/main/java/ru/nbch/credit_tracker/entities/response/errors/MonitoringDownloadError.java

@@ -0,0 +1,25 @@
+package ru.nbch.credit_tracker.entities.response.errors;
+
+import jakarta.xml.bind.annotation.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@XmlAccessorType(XmlAccessType.FIELD)
+@XmlType(name = "MonitoringDownloadResponse", propOrder = {
+        "status",
+        "errorCode",
+        "errorText"
+})
+@XmlRootElement(name = "MonitoringDownloadResponse")
+public class MonitoringDownloadError implements CommonError {
+
+    @XmlElement(name = "Status", required = true)
+    protected String status;
+    @XmlElement(name = "ErrorCode",required = true)
+    protected String errorCode;
+    @XmlElement(name = "ErrorText",required = true)
+    protected String errorText;
+
+}

src/main/java/ru/nbch/credit_tracker/enums/SignalError.java

@@ -17,6 +17,7 @@ public enum SignalError {
     ERROR_011("011", "Получен невалидный XML"),
     ERROR_012("012", "Пакет не найден"),
     ERROR_013("013", "На стороне сервиса произошла ошибка, попробуйте повторить запрос позже или сообщите в техническую поддержку"),
+    ERROR_014("014", "Файл не найден"),
     ERROR_015("015", "Клиент с указанным membercode не найден"),
     ERROR_016("016", "Нет активного пакета с именем "),
     ERROR_017("017", "При обработке запроса произошла ошибка. Повторите запрос позже или обратитесь в службу технической поддержки"), // TODO get rid of duplicate?

src/main/java/ru/nbch/credit_tracker/facade/SignalFacade.java

@@ -2,6 +2,7 @@ package ru.nbch.credit_tracker.facade;
 
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.core.io.FileUrlResource;
 import org.springframework.core.io.Resource;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
@@ -12,6 +13,7 @@ import ru.nbch.credit_tracker.entities.request.monitoring_request.MonitoringRequ
 import ru.nbch.credit_tracker.entities.request.monitoring_request.Subject;
 import ru.nbch.credit_tracker.entities.response.active_packages.MonitoringActivePackagesResponse;
 import ru.nbch.credit_tracker.entities.response.errors.MonitoringActivePackagesError;
+import ru.nbch.credit_tracker.entities.response.errors.MonitoringDownloadError;
 import ru.nbch.credit_tracker.entities.response.errors.MonitoringPackageDeleteError;
 import ru.nbch.credit_tracker.entities.response.errors.MonitoringReportListError;
 import ru.nbch.credit_tracker.entities.response.success.MonitoringPackageDeleteResponse;
@@ -29,6 +31,7 @@ import ru.nbch.credit_tracker.service.xml.FailureAnswerGenerator;
 import ru.nbch.credit_tracker.service.xml.SuccessAnswerGenerator;
 import ru.nbch.credit_tracker.service.xml.jaxb.IXmlProcessor;
 import ru.nbch.credit_tracker.service.xml.jaxb.XmlUtilService;
+import ru.nbch.credit_tracker.utils.CTUtil;
 import ru.nbch.credit_tracker.utils.ValidationUtil;
 
 import java.io.File;
@@ -347,4 +350,28 @@ public class SignalFacade {
             throw new SignalErrorException(SignalError.ERROR_013, null, new MonitoringReportListError(), false);
         }
     }
+
+    public ResponseEntity<Resource> downloadFile(String fileName) {
+        try {
+            String memberCode = CTUtil.getMemberCodeFromFileName(fileName);
+            String dirPath = config.getLoadDir() + File.separator + memberCode;
+            File folder = new File(dirPath);
+
+            if (folder.exists() && folder.isDirectory()) {
+                File file = new File(dirPath + File.separator + fileName);
+                if (file.exists() && file.isFile()) {
+                    return ResponseEntity.ok().body(new FileUrlResource(file.getPath()));
+                }
+            } else {
+                throw new SignalErrorException(SignalError.ERROR_014, null, new MonitoringDownloadError(), true);
+            }
+            throw new SignalErrorException(SignalError.ERROR_014, null, new MonitoringDownloadError(), true);
+        } catch (Exception e) {
+            if (e instanceof SignalErrorException) {
+                throw (SignalErrorException) e;
+            }
+            log.error(e.getMessage(), e);
+            throw new SignalErrorException(SignalError.ERROR_013, null, new MonitoringDownloadError(), false);
+        }
+    }
 }

src/main/java/ru/nbch/credit_tracker/utils/CTUtil.java

@@ -38,6 +38,15 @@ public class CTUtil {
     }
 
     public static String generateResponseReportFileName(String userId, String packageName) {
-        return userId.substring(0,6) + "_" + packageName + "_" + LocalDateTime.now().format(responseReportDateTimeFormatter);
+        return userId.substring(0, 6) + "_" + packageName + "_" + LocalDateTime.now().format(responseReportDateTimeFormatter);
+    }
+
+    public static String getMemberCodeFromFileName(String fileName) {
+        String[] parts = fileName.split("_");
+        if (parts.length > 1) {
+            return parts[0];
+        } else {
+            return null;
+        }
     }
 }