quality_app-v2/documentation/WAREHOUSE_INVENTORY_IMPLEMENTATION.md

# 🏭 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 ✅