完成报表中心

2026-04-27 22:07:20 +08:00
parent d503036aeb
commit f9a9c630c2
26 changed files with 1127 additions and 4 deletions
@@ -0,0 +1,56 @@
+package com.mzh.library.service.impl;
+
+import com.mzh.library.dao.ReportDao;
+import com.mzh.library.entity.AuthenticatedUser;
+import com.mzh.library.entity.Permission;
+import com.mzh.library.entity.ReportCenter;
+import com.mzh.library.exception.DaoException;
+import com.mzh.library.service.PermissionPolicy;
+import com.mzh.library.service.ReportService;
+import com.mzh.library.service.ServiceResult;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class ReportServiceImpl implements ReportService {
+    private static final Logger LOGGER = Logger.getLogger(ReportServiceImpl.class.getName());
+    private static final String UNAVAILABLE_MESSAGE =
+        "Report service is temporarily unavailable. Please try again later.";
+    private static final String DENIED_MESSAGE = "You do not have permission to view reports.";
+    private static final int POPULAR_BOOK_LIMIT = 10;
+
+    private final ReportDao reportDao;
+    private final PermissionPolicy permissionPolicy;
+
+    public ReportServiceImpl(ReportDao reportDao) {
+        this(reportDao, new PermissionPolicy());
+    }
+
+    public ReportServiceImpl(ReportDao reportDao, PermissionPolicy permissionPolicy) {
+        this.reportDao = reportDao;
+        this.permissionPolicy = permissionPolicy;
+    }
+
+    @Override
+    public ServiceResult<ReportCenter> loadReportCenter(AuthenticatedUser actor) {
+        if (!canViewReports(actor)) {
+            return ServiceResult.failure(DENIED_MESSAGE);
+        }
+
+        try {
+            ReportCenter reportCenter = new ReportCenter();
+            reportCenter.setInventorySummary(reportDao.loadInventorySummary());
+            reportCenter.setBorrowingSummary(reportDao.loadBorrowingSummary());
+            reportCenter.setOverdueRows(reportDao.findOverdueRows());
+            reportCenter.setPopularBooks(reportDao.findPopularBooks(POPULAR_BOOK_LIMIT));
+            return ServiceResult.success(reportCenter);
+        } catch (DaoException ex) {
+            LOGGER.log(Level.SEVERE, "Unable to load report center actorId=" + actor.getId(), ex);
+            return ServiceResult.failure(UNAVAILABLE_MESSAGE);
+        }
+    }
+
+    private boolean canViewReports(AuthenticatedUser actor) {
+        return actor != null && permissionPolicy.allows(actor.getRole(), Permission.VIEW_REPORTS);
+    }
+}