UI and logic improvements for warehouse CSV import: permanent preview table, create locations button, card reordering, and CSV format guidance.

py_app/app/warehouse.py

@@ -0,0 +1,112 @@
+import mariadb
+from flask import current_app, request, render_template
+import csv
+
+def get_db_connection():
+    settings_file = current_app.instance_path + '/external_server.conf'
+    settings = {}
+    with open(settings_file, 'r') as f:
+        for line in f:
+            key, value = line.strip().split('=', 1)
+            settings[key] = value
+    return mariadb.connect(
+        user=settings['username'],
+        password=settings['password'],
+        host=settings['server_domain'],
+        port=int(settings['port']),
+        database=settings['database_name']
+    )
+
+def ensure_warehouse_locations_table():
+    try:
+        conn = get_db_connection()
+        cursor = conn.cursor()
+        cursor.execute("SHOW TABLES LIKE 'warehouse_locations'")
+        result = cursor.fetchone()
+        if not result:
+            cursor.execute('''
+                CREATE TABLE IF NOT EXISTS warehouse_locations (
+                    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+                    location_code VARCHAR(12) NOT NULL,
+                    size INT,
+                    description VARCHAR(250)
+                )
+            ''')
+            conn.commit()
+        conn.close()
+    except Exception as e:
+        print(f"Error ensuring warehouse_locations table: {e}")
+
+# Add warehouse-specific functions below
+def add_location(location_code, size, description):
+    conn = get_db_connection()
+    cursor = conn.cursor()
+    try:
+        cursor.execute(
+            "INSERT INTO warehouse_locations (location_code, size, description) VALUES (?, ?, ?)",
+            (location_code, size if size else None, description)
+        )
+        conn.commit()
+        conn.close()
+        return "Location added successfully."
+    except mariadb.IntegrityError:
+        conn.close()
+        return "Failed: Location code already exists."
+
+def get_locations():
+    conn = get_db_connection()
+    cursor = conn.cursor()
+    cursor.execute("SELECT id, location_code, size, description FROM warehouse_locations ORDER BY id DESC")
+    locations = cursor.fetchall()
+    conn.close()
+    return locations
+
+def recreate_warehouse_locations_table():
+    conn = get_db_connection()
+    cursor = conn.cursor()
+    cursor.execute("DROP TABLE IF EXISTS warehouse_locations")
+    cursor.execute("""
+        CREATE TABLE warehouse_locations (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            location_code VARCHAR(12) UNIQUE NOT NULL,
+            size INT,
+            description VARCHAR(250)
+        )
+    """)
+    conn.commit()
+    conn.close()
+
+def create_locations_handler():
+    message = None
+    if request.method == "POST":
+        location_code = request.form.get("location_code")
+        size = request.form.get("size")
+        description = request.form.get("description")
+        message = add_location(location_code, size, description)
+    locations = get_locations()
+    return render_template("create_locations.html", locations=locations, message=message)
+
+def import_locations_csv_handler():
+    report = None
+    locations = []
+    errors = []
+    if request.method == 'POST':
+        file = request.files.get('csv_file')
+        if file and file.filename.endswith('.csv'):
+            content = file.read().decode('utf-8').splitlines()
+            reader = csv.DictReader(content)
+            locations = [(row.get('location_code'), row.get('size'), row.get('description')) for row in reader]
+            if request.form.get('create_locations'):
+                added = 0
+                failed = 0
+                errors = []
+                for loc in locations:
+                    location_code, size, description = loc
+                    result = add_location(location_code, size, description)
+                    if result and 'success' in result.lower():
+                        added += 1
+                    else:
+                        failed += 1
+                        errors.append(location_code)
+                report = f"{added} locations were added to warehouse_locations table. {failed} locations failed: {', '.join(errors)}"
+    return render_template('import_locations_csv.html', report=report, locations=locations)