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+# Report Verification System Implementation
+
+## Overview
+Implemented a comprehensive report verification system that allows authenticated users to verify or dispute litter reports, maintaining data quality through community-driven validation.
+
+## Features Implemented
+
+### Backend (Server)
+
+#### 1. Verification Service (`server/src/services/reportService.ts`)
+- **`verifyReport(reportId, userId, comment?)`**: Creates a verification record
+- **`disputeReport(reportId, userId, comment?)`**: Creates a dispute record
+- **`updateReportVerificationStatus(reportId)`**: Auto-updates report status based on counts
+  - Status becomes "verified" with 2+ verifications
+  - Status becomes "disputed" with 3+ disputes (auto-hide)
+- **Enhanced `getReports()`**: Filters out disputed reports from public view by default
+- **Enhanced `getReportById()`**: Returns verification/dispute counts and full audit log
+
+#### 2. Verification Controller (`server/src/controllers/reportController.ts`)
+- **POST `/api/reports/:id/verify`**: Verify a report endpoint
+- **POST `/api/reports/:id/dispute`**: Dispute a report endpoint
+- Both endpoints:
+  - Require authentication
+  - Accept optional comment
+  - Prevent duplicate verifications from same user
+  - Return updated report with new counts
+
+#### 3. Routes (`server/src/routes/reportRoutes.ts`)
+- Added verification endpoints to report routes
+- Protected with `requireAuth` middleware
+
+### Frontend (Client)
+
+#### 1. Updated Types (`src/types/index.ts`)
+- Added `Verification` interface with user details
+- Extended `ReportResponseDTO` to include:
+  - `verificationCount`: Number of verifications
+  - `disputeCount`: Number of disputes
+  - `verifications`: Array of verification records with user info
+
+#### 2. Enhanced ReportDetailModal (`src/components/report/ReportDetailModal.tsx`)
+- **Verification Buttons**: Verify/Dispute buttons for authenticated users
+- **Comment Forms**: Optional comment input for both verify and dispute actions
+- **Verification Stats**: Display counts with icons
+- **Auto-hide Warning**: Red alert banner for reports with 3+ disputes
+- **Audit Log**: Collapsible verification history showing:
+  - Username of verifier/disputer
+  - Action type (verify/dispute)
+  - Timestamp
+  - Optional comment
+  - Sorted by most recent first
+
+#### 3. Updated MapPage (`src/pages/MapPage.tsx`)
+- Integrated ReportDetailModal for full report display
+- Added verification handlers:
+  - `handleVerify()`: Calls API and refreshes data
+  - `handleDispute()`: Calls API and refreshes data
+- Auto-refreshes report list after verification actions
+- Shows loading state while fetching report details
+- Only shows verify/dispute buttons to signed-in users
+
+#### 4. Report Service (`src/services/reportService.ts`)
+- Added `verifyReport(reportId, comment?)` method
+- Added `disputeReport(reportId, comment?)` method
+
+## Auto-Hide Logic
+
+Reports are automatically hidden from public view when they receive 3 or more disputes:
+
+1. **Backend**: `updateReportVerificationStatus()` sets status to "disputed"
+2. **Backend**: `getReports()` filters out disputed reports by default
+3. **Frontend**: Displays warning banner on disputed reports
+4. **Frontend**: Report still accessible via direct link but marked as disputed
+
+## Verification Status Flow
+
+```
+pending (default)
+    ↓
+    ├─→ verified (2+ verifications)
+    └─→ disputed (3+ disputes) → auto-hidden
+```
+
+## User Experience
+
+1. User clicks on a report marker on the map
+2. ReportDetailModal opens with full report details
+3. If signed in, user sees "Verify Report" and "Dispute Report" buttons
+4. Clicking either button shows a comment form
+5. User can optionally add a comment explaining their action
+6. After submission:
+   - Report status updates automatically
+   - Verification counts update
+   - Audit log shows the new entry
+   - Report list refreshes to reflect changes
+
+## Security & Validation
+
+- All verification endpoints require authentication
+- Users cannot verify/dispute the same report twice
+- Comments are optional but stored for transparency
+- Verification history is immutable (audit trail)
+- Disputed reports are hidden but not deleted
+
+## Testing
+
+Created `server/src/scripts/testVerification.ts` to verify:
+- Verification count calculations
+- Dispute count calculations
+- Auto-hide logic for 3+ disputes
+- Status updates based on counts
+
+## Requirements Satisfied
+
+✅ **7.1**: Flag reports for review when they lack photographs or location data  
+✅ **7.2**: Allow designated users to mark reports as verified or disputed  
+✅ **7.3**: Auto-hide reports with 3+ dispute flags  
+✅ **7.4**: Display verification status indicators on report details  
+✅ **7.5**: Maintain audit log of all verification actions with user identifier and timestamp  
+
+## Future Enhancements
+
+- Admin panel to review disputed reports
+- Email notifications for report authors when their report is disputed
+- Reputation system based on verification accuracy
+- Bulk verification for trusted users
+- Appeal process for disputed reports