Implement approved/rejected quantity triggers and warehouse inventory

Database Triggers Implementation: - Added automatic quantity calculation triggers for scanfg_orders - Added automatic quantity calculation triggers for scan1_orders (T1 phase) - Triggers calculate based on CP_base_code grouping (8 digits) - Quality code: 0 = approved, != 0 = rejected - Quantities set at insertion time (BEFORE INSERT trigger) - Added create_triggers() function to initialize_db.py Warehouse Inventory Enhancement: - Analyzed old app database quantity calculation logic - Created comprehensive trigger implementation guide - Added trigger verification and testing procedures - Documented data migration strategy Documentation Added: - APPROVED_REJECTED_QUANTITIES_ANALYSIS.md - Old app logic analysis - DATABASE_TRIGGERS_IMPLEMENTATION.md - v2 implementation guide - WAREHOUSE_INVENTORY_IMPLEMENTATION.md - Inventory view feature Files Modified: - initialize_db.py: Added create_triggers() function and call in main() - Documentation: 3 comprehensive guides for database and inventory management Quality Metrics: - Triggers maintain legacy compatibility - Automatic calculation ensures data consistency - Performance optimized at database level - Comprehensive testing documented
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+# 🏭 Warehouse Inventory - CP Articles View Implementation
+
+**Date:** January 30, 2026  
+**Status:** ✅ Implemented and Deployed  
+**Feature:** CP Article Inventory with Box & Location Tracking
+
+---
+
+## 📋 Overview
+
+Implemented a comprehensive warehouse inventory view that allows users to:
+- View all CP articles scanned in the FG Scan module
+- Track which boxes contain specific CP codes
+- View warehouse locations for each box
+- Search by CP code (8 digits or full 15-character code)
+- Search by box number
+- View detailed information for each CP code variation
+- Filter and sort entries with latest entries displayed first
+
+---
+
+## 🗄️ Database Structure Understanding
+
+### scanfg_orders Table (Extended Schema)
+
+```sql
+CREATE TABLE scanfg_orders (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    operator_code VARCHAR(50),           -- Person who scanned (e.g., "OP01")
+    CP_full_code VARCHAR(50),            -- Full CP code (e.g., "CP00000001-0001")
+    OC1_code VARCHAR(50),                -- OC1 code
+    OC2_code VARCHAR(50),                -- OC2 code
+    quality_code VARCHAR(10),            -- Quality status (0=Rejected, 1=Approved)
+    date DATE,                           -- Scan date
+    time TIME,                           -- Scan time
+    approved_quantity INT,               -- Approved count
+    rejected_quantity INT,               -- Rejected count
+    box_id BIGINT,                       -- FK: Reference to boxes_crates table
+    location_id BIGINT,                  -- FK: Reference to warehouse_locations table
+    created_at TIMESTAMP,
+    
+    -- Indexes for fast querying
+    INDEX idx_cp_code (CP_full_code),
+    INDEX idx_operator (operator_code),
+    INDEX idx_date (date),
+    INDEX idx_box_id (box_id),
+    INDEX idx_location_id (location_id),
+    
+    -- Foreign Keys
+    FOREIGN KEY (box_id) REFERENCES boxes_crates(id) ON DELETE SET NULL,
+    FOREIGN KEY (location_id) REFERENCES warehouse_locations(id) ON DELETE SET NULL
+);
+```
+
+### CP Code Structure
+
+From the old application and current implementation:
+
+- **CP Base (8 digits):** `CP00000001`
+  - Used to group related entries
+  - Represents the core product/order reference
+  
+- **CP Full Code (15 characters):** `CP00000001-0001`
+  - Includes 4-digit suffix after hyphen
+  - Can have multiple entries (e.g., `-0001`, `-0002`, `-0003`)
+  - Different suffixes can be in different boxes and locations
+
+### Relationships
+
+```
+scanfg_orders (many)
+    ├─→ boxes_crates (one)
+    │   └─→ warehouse_locations (one)
+    │
+    └─→ warehouse_locations (one) [Direct location assignment]
+```
+
+---
+
+## ✨ Features Implemented
+
+### 1. Backend Functions (warehouse.py)
+
+#### `get_cp_inventory_list(limit=100, offset=0)`
+- Returns all CP articles with aggregated data
+- Groups by CP base code and box
+- Shows latest entries first
+- Returns: box_number, location_code, total_entries, total_approved, total_rejected, latest_date, latest_time
+
+#### `search_cp_code(cp_code_search)`
+- Searches by full CP code or CP base (8 digits)
+- Handles hyphen-separated format
+- Returns all matching entries with box and location info
+
+#### `search_by_box_number(box_number_search)`
+- Finds all CP codes in a specific box
+- Shows operator, quality code, quantities
+- Returns full details for each entry
+
+#### `get_cp_details(cp_code)`
+- Gets all variations of a CP code (all suffixes)
+- Shows each entry's operator, quality status, box, location
+- Useful for traceability and detailed audit trail
+
+### 2. API Endpoints (routes.py)
+
+#### `GET /warehouse/api/cp-inventory`
+- List all CP inventory items
+- Pagination support (limit, offset)
+- Response includes count and metadata
+
+**Example Response:**
+```json
+{
+    "success": true,
+    "inventory": [
+        {
+            "id": 1,
+            "CP_full_code": "CP00000001-0001",
+            "cp_base": "CP00000001",
+            "total_entries": 1,
+            "box_id": 5,
+            "box_number": "BOX001",
+            "location_code": "FG_INCOMING",
+            "total_approved": 10,
+            "total_rejected": 0,
+            "latest_date": "2026-01-30",
+            "latest_time": "14:30:15"
+        }
+    ],
+    "count": 25,
+    "limit": 500,
+    "offset": 0
+}
+```
+
+#### `POST /warehouse/api/search-cp`
+- Search by CP code
+- Accepts: `{ "cp_code": "CP00000001" }`
+- Returns matching entries grouped by box
+
+#### `POST /warehouse/api/search-cp-box`
+- Search by box number
+- Accepts: `{ "box_number": "BOX001" }`
+- Returns all CP entries in that specific box
+
+#### `GET /warehouse/api/cp-details/<cp_code>`
+- Get detailed info for a CP code (8 digits)
+- Shows all variations with different suffixes
+- Returns all scans, locations, and box assignments
+
+### 3. Frontend Interface (inventory.html)
+
+#### Search Section
+- **CP Code Search:** Enter full code or base code
+  - Example: "CP00000001" or "CP00000001-0001"
+  - Wildcard search for partial matches
+  
+- **Box Number Search:** Find all CP codes in a box
+  - Example: "BOX001"
+  - Shows all related entries
+
+#### Results Table
+Columns displayed (sorted by latest first):
+- **CP Code (Base):** Base 8-digit CP code (badge)
+- **CP Full Code:** Complete 15-character code with suffix
+- **Box Number:** Which box contains this item
+- **Location:** Warehouse location code
+- **Total Entries:** How many variations exist
+- **Approved Qty:** Total approved quantity
+- **Rejected Qty:** Total rejected quantity
+- **Latest Date:** Most recent scan date
+- **Latest Time:** Most recent scan time
+- **Actions:** View details button
+
+#### Detail Modal
+- Displays all variations of a CP code
+- Shows detailed table with:
+  - CP Full Code
+  - Operator Code
+  - Quality status (Approved/Rejected)
+  - Box assignment
+  - Location
+  - Scan date and time
+
+---
+
+## 🔄 Data Flow
+
+### 1. CP Code Entry Flow
+```
+FG Scan Module (/quality/fg-scan)
+    ↓
+    User scans CP code (CP + 8 digits + hyphen + 4 digits)
+    ↓
+    Scan saved to scanfg_orders table
+    ↓
+    Optional: Assign to box (box_id)
+    ↓
+    Optional: Update location (location_id)
+```
+
+### 2. Inventory Query Flow
+```
+User visits /warehouse/inventory
+    ↓
+    loadInventory() called (JavaScript)
+    ↓
+    Fetch /warehouse/api/cp-inventory
+    ↓
+    Database aggregates all scanfg_orders entries
+    ↓
+    Groups by CP base + box
+    ↓
+    Returns sorted by latest date (DESC)
+    ↓
+    Render in table with all details
+```
+
+### 3. Search Flow
+```
+User searches for CP code "CP00000001"
+    ↓
+    JavaScript sends POST to /warehouse/api/search-cp
+    ↓
+    Backend searches for REPLACE(CP_full_code, '-', '') LIKE 'CP00000001%'
+    ↓
+    Returns all matching entries
+    ↓
+    Frontend renders results table
+    ↓
+    User can click "View Details" for each entry
+```
+
+---
+
+## 📊 Query Examples
+
+### Get all CP inventory grouped by base code and box
+```sql
+SELECT 
+    s.CP_full_code,
+    SUBSTRING(s.CP_full_code, 1, 10) as cp_base,
+    COUNT(*) as total_entries,
+    s.box_id,
+    bc.box_number,
+    wl.location_code,
+    MAX(s.date) as latest_date,
+    MAX(s.time) as latest_time,
+    SUM(s.approved_quantity) as total_approved,
+    SUM(s.rejected_quantity) as total_rejected
+FROM scanfg_orders s
+LEFT JOIN boxes_crates bc ON s.box_id = bc.id
+LEFT JOIN warehouse_locations wl ON s.location_id = wl.id
+GROUP BY SUBSTRING(s.CP_full_code, 1, 10), s.box_id
+ORDER BY MAX(s.created_at) DESC;
+```
+
+### Search for specific CP code
+```sql
+SELECT * FROM scanfg_orders
+WHERE REPLACE(CP_full_code, '-', '') LIKE 'CP00000001%'
+ORDER BY created_at DESC;
+```
+
+### Find all CP codes in a box
+```sql
+SELECT s.*, bc.box_number, wl.location_code
+FROM scanfg_orders s
+LEFT JOIN boxes_crates bc ON s.box_id = bc.id
+LEFT JOIN warehouse_locations wl ON s.location_id = wl.id
+WHERE bc.box_number LIKE '%BOX001%'
+ORDER BY s.created_at DESC;
+```
+
+---
+
+## 🚀 Usage Guide
+
+### Accessing the Inventory View
+1. Navigate to Warehouse Module
+2. Click "Inventory" option
+3. Page loads with all CP articles (latest first)
+
+### Searching by CP Code
+1. Enter CP code in "Search by CP Code" field
+   - Can enter: "CP00000001" or "CP00000001-0001"
+   - Can enter partial: "CP000" for wildcard search
+2. Click "Search CP" button
+3. Results update in real-time
+
+### Searching by Box Number
+1. Enter box number in "Search by Box Number" field
+   - Example: "BOX001"
+2. Click "Search Box" button
+3. View all CP codes in that box
+
+### Viewing CP Details
+1. Click the "eye" icon in the Actions column
+2. Modal opens showing:
+   - All variations of that CP code
+   - Operator who scanned each one
+   - Quality status for each
+   - Box and location assignments
+   - Detailed timestamp info
+
+### Clearing Searches
+1. Click "Clear" button next to search field
+2. Returns to full inventory view
+3. Shows all latest entries
+
+---
+
+## 📈 Performance Considerations
+
+### Indexes Used
+- `idx_cp_code` on CP_full_code
+- `idx_box_id` for box lookups
+- `idx_location_id` for location filtering
+- `idx_date` for date-range queries
+- `idx_operator` for operator tracking
+
+### Query Optimization
+- Group aggregation reduces result set size
+- Indexes on foreign keys for fast joins
+- Limit 500 default to prevent large transfers
+- Latest entries first using created_at DESC
+
+### Scalability
+For large datasets (100,000+ records):
+- Consider table partitioning by date
+- Archive old scans to separate table
+- Materialized views for common reports
+- Consider caching for frequently searched CPs
+
+---
+
+## 🔐 Security & Permissions
+
+### Access Control
+- User must be logged in (session check)
+- Returns 401 Unauthorized if not authenticated
+- All routes check `if 'user_id' not in session`
+
+### Data Validation
+- CP code search minimum 2 characters
+- Box number search requires non-empty string
+- Pagination limits (max 1000 records)
+- SQL injection prevented via parameterized queries
+
+---
+
+## 📋 Implementation Details
+
+### Files Modified
+1. **app/modules/warehouse/warehouse.py**
+   - Added 4 new functions for CP inventory operations
+   - Added pymysql import for cursor operations
+
+2. **app/modules/warehouse/routes.py**
+   - Updated imports to include new warehouse functions
+   - Added 4 new API endpoints
+   - Integrated authentication checks
+
+3. **app/templates/modules/warehouse/inventory.html**
+   - Complete rewrite with interactive interface
+   - Added JavaScript for real-time search
+   - Added detail modal for viewing CP variations
+   - Responsive design with Bootstrap styling
+
+### Code Statistics
+- **Backend Functions:** 4 new functions
+- **API Endpoints:** 4 new routes
+- **Frontend Lines:** 600+ lines (HTML + CSS + JS)
+- **Total Code Added:** ~800 lines
+
+---
+
+## ✅ Testing Checklist
+
+- [x] Backend functions execute without errors
+- [x] API endpoints return proper JSON responses
+- [x] Search by CP code works with full and partial codes
+- [x] Search by box number finds all related CP entries
+- [x] Latest entries display first (ORDER BY DESC)
+- [x] CP details modal shows all variations
+- [x] Pagination works with limit/offset
+- [x] Error messages display properly
+- [x] Loading indicators appear during API calls
+- [x] Authentication checks work
+- [x] Database joins with boxes_crates and warehouse_locations
+- [x] Status messages show search results count
+
+---
+
+## 🔄 Integration Points
+
+### With FG Scan Module
+- Reads scanfg_orders entries created by FG Scan
+- Shows CP codes as they are scanned
+- Tracks box assignments from assign_cp_to_box feature
+
+### With Warehouse Module
+- Uses warehouse_locations for location display
+- Uses boxes_crates for box information
+- Part of warehouse management workflow
+
+### With Quality Module
+- Shows quality_code status (approved/rejected)
+- Tracks operator who scanned each item
+- Provides quality metrics
+
+---
+
+## 🚀 Future Enhancements
+
+1. **Export/Download**
+   - Export search results to CSV/Excel
+   - Print inventory reports
+
+2. **Advanced Filtering**
+   - Filter by date range
+   - Filter by quality status (approved/rejected)
+   - Filter by operator code
+   - Filter by location
+
+3. **Analytics**
+   - Generate warehouse occupancy reports
+   - CP code aging (how long in warehouse)
+   - Location utilization statistics
+
+4. **Real-Time Updates**
+   - WebSocket for live inventory updates
+   - Automatic refresh when new scans added
+   - Real-time location change notifications
+
+5. **Barcode Generation**
+   - Generate barcodes for CP codes
+   - Generate warehouse location labels
+   - Print bulk labels for organization
+
+6. **Mobile Interface**
+   - Responsive inventory lookup
+   - Mobile-optimized search
+   - QR code scanning support
+
+---
+
+## 📞 Support & Troubleshooting
+
+### Common Issues
+
+**Issue:** No results when searching
+- **Solution:** Check CP code format (must include "CP")
+- Ensure items exist in scanfg_orders table
+- Try searching for partial CP code
+
+**Issue:** Box shows as "No Box"
+- **Solution:** Item may not be assigned to box yet
+- Check box_id field in scanfg_orders
+- Assign to box through FG Scan assign feature
+
+**Issue:** Location shows as "No Location"
+- **Solution:** Box may not have location assigned
+- Assign location in warehouse locations module
+- Update box location through inventory interface
+
+**Issue:** Database errors
+- **Solution:** Ensure boxes_crates table exists
+- Ensure warehouse_locations table exists
+- Check database connection parameters
+
+---
+
+## 📝 Documentation Files
+
+Related documentation:
+- [SCANFG_ORDERS_BOX_TRACKING.md](SCANFG_ORDERS_BOX_TRACKING.md) - Box tracking details
+- [BOXES_IMPLEMENTATION_DETAILS.md](BOXES_IMPLEMENTATION_DETAILS.md) - Box feature docs
+- [TRACEABILITY_WORKFLOW_ANALYSIS.md](TRACEABILITY_WORKFLOW_ANALYSIS.md) - CP traceability flow
+
+---
+
+## ✨ Summary
+
+The Warehouse Inventory CP Articles view provides a complete solution for:
+- **Viewing:** All CP articles scanned in FG module
+- **Tracking:** Which boxes and locations contain each CP
+- **Searching:** Quick lookup by CP code or box number
+- **Analyzing:** Detailed information for traceability
+- **Managing:** Latest entries displayed for efficient warehouse operations
+
+This feature bridges the gap between FG Scanning and warehouse operations, enabling complete product traceability from scan to storage location.
+
+---
+
+**Last Updated:** January 30, 2026  
+**Version:** 1.0  
+**Status:** Production Ready ✅