added categories, import export, settings

lib/models/product.dart

@@ -8,6 +8,11 @@ class Product {
     required this.lastPrice,
     required this.timesSeen,
     required this.updatedAt,
+    this.favourite = false,
+    this.imagePath,
+    this.supermarket,
+    this.notes,
+    this.category,
   });
 
   final int id;
@@ -15,14 +20,56 @@ class Product {
   final double lastPrice;
   final int timesSeen;
   final DateTime updatedAt;
+  final bool favourite;
+  final String? imagePath;
+  final String? supermarket;
+  final String? notes;
+  final String? category;
 
   factory Product.fromMap(Map<String, Object?> map) {
     return Product(
       id: map['id']! as int,
       name: map['name']! as String,
-      lastPrice: (map['last_price']! as num).toDouble(),
+      lastPrice: (map['display_price'] as num? ?? map['last_price']! as num)
+          .toDouble(),
       timesSeen: map['times_seen']! as int,
       updatedAt: DateTime.parse(map['updated_at']! as String),
+      favourite: (map['favourite'] as int? ?? 0) == 1,
+      imagePath: map['image_path'] as String?,
+      supermarket: map['supermarket'] as String?,
+      notes: map['notes'] as String?,
+      category: map['category'] as String?,
+    );
+  }
+
+  Product copyWith({
+    String? name,
+    double? lastPrice,
+    int? timesSeen,
+    DateTime? updatedAt,
+    bool? favourite,
+    String? imagePath,
+    String? supermarket,
+    String? notes,
+    String? category,
+    bool clearImage = false,
+    bool clearSupermarket = false,
+    bool clearNotes = false,
+    bool clearCategory = false,
+  }) {
+    return Product(
+      id: id,
+      name: name ?? this.name,
+      lastPrice: lastPrice ?? this.lastPrice,
+      timesSeen: timesSeen ?? this.timesSeen,
+      updatedAt: updatedAt ?? this.updatedAt,
+      favourite: favourite ?? this.favourite,
+      imagePath: clearImage ? null : (imagePath ?? this.imagePath),
+      supermarket: clearSupermarket ? null : (supermarket ?? this.supermarket),
+      notes: clearNotes ? null : (notes ?? this.notes),
+      category: clearCategory ? null : (category ?? this.category),
     );
   }
 }
+
+enum ProductSort { name, preferred }

lib/models/purchase.dart

@@ -0,0 +1,36 @@
+/// One time a product was bought, used for price and purchase history.
+library;
+
+class Purchase {
+  const Purchase({
+    required this.shopId,
+    required this.boughtAt,
+    required this.supermarket,
+    required this.price,
+    this.quantity,
+    this.unitPrice,
+    this.receiptImagePath,
+  });
+
+  final int shopId;
+  final DateTime boughtAt;
+  final String supermarket;
+  final double price;
+  final int? quantity;
+  final double? unitPrice;
+  final String? receiptImagePath;
+
+  double get unitOrLinePrice => unitPrice ?? price;
+
+  factory Purchase.fromMap(Map<String, Object?> map) {
+    return Purchase(
+      shopId: map['shop_id']! as int,
+      boughtAt: DateTime.parse(map['shopped_at']! as String),
+      supermarket: map['supermarket']! as String,
+      price: (map['price']! as num).toDouble(),
+      quantity: map['quantity'] as int?,
+      unitPrice: (map['unit_price'] as num?)?.toDouble(),
+      receiptImagePath: map['receipt_image_path'] as String?,
+    );
+  }
+}

lib/models/shop.dart

@@ -0,0 +1,63 @@
+/// A confirmed shopping trip saved from a receipt.
+library;
+
+class Shop {
+  const Shop({
+    required this.id,
+    required this.supermarket,
+    required this.shoppedAt,
+    required this.total,
+    required this.itemCount,
+    this.receiptImagePath,
+  });
+
+  final int id;
+  final String supermarket;
+  final DateTime shoppedAt;
+  final double total;
+  final int itemCount;
+  final String? receiptImagePath;
+
+  factory Shop.fromMap(Map<String, Object?> map) {
+    return Shop(
+      id: map['id']! as int,
+      supermarket: map['supermarket']! as String,
+      shoppedAt: DateTime.parse(map['shopped_at']! as String),
+      total: (map['total']! as num).toDouble(),
+      itemCount: (map['item_count'] as num?)?.toInt() ?? 0,
+      receiptImagePath: map['receipt_image_path'] as String?,
+    );
+  }
+}
+
+class ShopItem {
+  const ShopItem({
+    required this.id,
+    required this.shopId,
+    required this.productId,
+    required this.name,
+    required this.price,
+    this.quantity,
+    this.unitPrice,
+  });
+
+  final int id;
+  final int shopId;
+  final int productId;
+  final String name;
+  final double price;
+  final int? quantity;
+  final double? unitPrice;
+
+  factory ShopItem.fromMap(Map<String, Object?> map) {
+    return ShopItem(
+      id: map['id']! as int,
+      shopId: map['shop_id']! as int,
+      productId: map['product_id']! as int,
+      name: map['name']! as String,
+      price: (map['price']! as num).toDouble(),
+      quantity: map['quantity'] as int?,
+      unitPrice: (map['unit_price'] as num?)?.toDouble(),
+    );
+  }
+}

lib/models/supermarket.dart

@@ -0,0 +1,59 @@
+/// A user-defined supermarket with a display color.
+library;
+
+import 'package:flutter/material.dart';
+
+class Supermarket {
+  const Supermarket({
+    this.id,
+    required this.name,
+    required this.colorValue,
+    this.sortOrder = 0,
+  });
+
+  final int? id;
+  final String name;
+  final int colorValue;
+  final int sortOrder;
+
+  Color get color => Color(colorValue);
+
+  factory Supermarket.fromMap(Map<String, Object?> map) {
+    return Supermarket(
+      id: map['id'] as int?,
+      name: map['name']! as String,
+      colorValue: map['color']! as int,
+      sortOrder: map['sort_order'] as int? ?? 0,
+    );
+  }
+
+  Supermarket copyWith({
+    int? id,
+    String? name,
+    int? colorValue,
+    int? sortOrder,
+  }) {
+    return Supermarket(
+      id: id ?? this.id,
+      name: name ?? this.name,
+      colorValue: colorValue ?? this.colorValue,
+      sortOrder: sortOrder ?? this.sortOrder,
+    );
+  }
+}
+
+/// Palette offered when the user picks a store color.
+const List<int> kStoreColorPalette = [
+  0xFFEEC21B, // Jumbo yellow
+  0xFF0050AA, // Lidl blue
+  0xFF00A0E2, // AH blue
+  0xFF00205B, // Aldi navy
+  0xFF6EC31E, // Plus green
+  0xFFE30613, // Dirk / Coop red
+  0xFF009640, // SPAR green
+  0xFFE87722, // orange
+  0xFFE31C5F, // Picnic pink
+  0xFF7B1FA2, // purple
+  0xFF00897B, // teal
+  0xFF78909C, // grey
+];