adapt formulas to new price system

counter/forms.py

@@ -6,7 +6,6 @@ from datetime import date, datetime, timezone
 
 from dateutil.relativedelta import relativedelta
 from django import forms
-from django.core.validators import MaxValueValidator
 from django.db.models import Exists, OuterRef, Q
 from django.forms import BaseModelFormSet
 from django.utils.timezone import now
@@ -363,25 +362,6 @@ class ProductForm(forms.ModelForm):
             *args, product=self.instance, prefix="action", **kwargs
         )
 
-    def formula_init(self, formula: ProductFormula):
-        """Part of the form initialisation specific to formula products."""
-        self.fields["selling_price"].help_text = _(
-            "This product is a formula. "
-            "Its price cannot be greater than the price "
-            "of the products constituting it, which is %(price)s €"
-        ) % {"price": formula.max_selling_price}
-        self.fields["special_selling_price"].help_text = _(
-            "This product is a formula. "
-            "Its special price cannot be greater than the price "
-            "of the products constituting it, which is %(price)s €"
-        ) % {"price": formula.max_special_selling_price}
-        for key, price in (
-            ("selling_price", formula.max_selling_price),
-            ("special_selling_price", formula.max_special_selling_price),
-        ):
-            self.fields[key].widget.attrs["max"] = price
-            self.fields[key].validators.append(MaxValueValidator(price))
-
     def is_valid(self):
         return (
             super().is_valid()
@@ -424,18 +404,6 @@ class ProductFormulaForm(forms.ModelForm):
                     "the result and a part of the formula."
                 ),
             )
-        prices = [p.selling_price for p in cleaned_data["products"]]
-        special_prices = [p.special_selling_price for p in cleaned_data["products"]]
-        selling_price = cleaned_data["result"].selling_price
-        special_selling_price = cleaned_data["result"].special_selling_price
-        if selling_price > sum(prices) or special_selling_price > sum(special_prices):
-            self.add_error(
-                "result",
-                _(
-                    "The result cannot be more expensive "
-                    "than the total of the other products."
-                ),
-            )
         return cleaned_data
 
 

counter/models.py

@@ -448,10 +448,6 @@ class Product(models.Model):
             return True
         return any(user.is_in_group(pk=group.id) for group in buying_groups)
 
-    @property
-    def profit(self):
-        return self.selling_price - self.purchase_price
-
 
 class PriceQuerySet(models.QuerySet):
     def for_user(self, user: User) -> Self:
@@ -543,18 +539,6 @@ class ProductFormula(models.Model):
     def __str__(self):
         return self.result.name
 
-    @cached_property
-    def max_selling_price(self) -> float:
-        # iterating over all products is less efficient than doing
-        # a simple aggregation, but this method is likely to be used in
-        # coordination with `max_special_selling_price`,
-        # and Django caches the result of the `all` queryset.
-        return sum(p.selling_price for p in self.products.all())
-
-    @cached_property
-    def max_special_selling_price(self) -> float:
-        return sum(p.special_selling_price for p in self.products.all())
-
 
 class CounterQuerySet(models.QuerySet):
     def annotate_has_barman(self, user: User) -> Self:

counter/static/bundled/counter/basket.ts

@@ -1,11 +1,11 @@
-import type { Product } from "#counter:counter/types";
+import type { CounterItem } from "#counter:counter/types";
 
 export class BasketItem {
   quantity: number;
-  product: Product;
+  product: CounterItem;
   errors: string[];
 
-  constructor(product: Product, quantity: number) {
+  constructor(product: CounterItem, quantity: number) {
     this.quantity = quantity;
     this.product = product;
     this.errors = [];

counter/static/bundled/counter/counter-click-index.ts

@@ -2,6 +2,7 @@ import { AlertMessage } from "#core:utils/alert-message";
 import { BasketItem } from "#counter:counter/basket";
 import type {
   CounterConfig,
+  CounterItem,
   ErrorMessage,
   ProductFormula,
 } from "#counter:counter/types";
@@ -63,8 +64,10 @@ document.addEventListener("alpine:init", () => {
     },
 
     checkFormulas() {
+      // Try to find a formula.
+      // A formula is found if all its elements are already in the basket
       const products = new Set(
-        Object.keys(this.basket).map((i: string) => Number.parseInt(i)),
+        Object.values(this.basket).map((item: BasketItem) => item.product.productId),
       );
       const formula: ProductFormula = config.formulas.find((f: ProductFormula) => {
         return f.products.every((p: number) => products.has(p));
@@ -72,22 +75,29 @@ document.addEventListener("alpine:init", () => {
       if (formula === undefined) {
         return;
       }
+      // Now that the formula is found, remove the items composing it from the basket
       for (const product of formula.products) {
-        const key = product.toString();
+        const key = Object.entries(this.basket).find(
+          ([_, i]: [string, BasketItem]) => i.product.productId === product,
+        )[0];
         this.basket[key].quantity -= 1;
         if (this.basket[key].quantity <= 0) {
           this.removeFromBasket(key);
         }
       }
+      // Then add the result product of the formula to the basket
+      const result = Object.values(config.products)
+        .filter((item: CounterItem) => item.productId === formula.result)
+        .reduce((acc, curr) => (acc.price.amount < curr.price.amount ? acc : curr));
+      this.addToBasket(result.price.id, 1);
       this.alertMessage.display(
         interpolate(
           gettext("Formula %(formula)s applied"),
-          { formula: config.products[formula.result.toString()].name },
+          { formula: result.name },
           true,
         ),
         { success: true },
       );
-      this.addToBasket(formula.result.toString(), 1);
     },
 
     getBasketSize() {

counter/static/bundled/counter/types.d.ts

@@ -2,7 +2,7 @@ export type ErrorMessage = string;
 
 export interface InitialFormData {
   /* Used to refill the form when the backend raises an error */
-  id?: keyof Record<string, Product>;
+  id?: keyof Record<string, CounterItem>;
   quantity?: number;
   errors?: string[];
 }
@@ -15,7 +15,7 @@ export interface ProductFormula {
 export interface CounterConfig {
   customerBalance: number;
   customerId: number;
-  products: Record<string, Product>;
+  products: Record<string, CounterItem>;
   formulas: ProductFormula[];
   formInitial: InitialFormData[];
   cancelUrl: string;
@@ -26,10 +26,11 @@ interface Price {
   amount: number;
 }
 
-export interface Product {
+export interface CounterItem {
+  productId: number;
+  price: Price;
   code: string;
   name: string;
-  price: Price;
   hasTrayPrice: boolean;
   quantityForTrayPrice: number;
 }

counter/templates/counter/counter_click.jinja

@@ -202,7 +202,7 @@
       </div>
 
       <div id="products">
-        {% if not products %}
+        {% if not prices %}
           <div class="alert alert-red">
             {% trans %}No products available on this counter for this user{% endtrans %}
           </div>
@@ -242,9 +242,11 @@
   {{ super() }}
   <script>
     const products = {
-      {%- for price in products -%}
+      {%- for price in prices -%}
         {{ price.id }}: {
+          productId: {{ price.product_id }},
           price: { id: "{{ price.id }}", amount: {{ price.amount }} },
+          code: "{{ price.product.code }}",
           name: "{{ price.full_label }}",
           hasTrayPrice: {{ price.product.tray | tojson }},
           quantityForTrayPrice: {{ price.product.QUANTITY_FOR_TRAY_PRICE }},

counter/templates/counter/formula_list.jinja

@@ -49,14 +49,10 @@
             <strong class="card-title">{{ formula.result.name }}</strong>
             <p>
               {% for p in formula.products.all() %}
-                <i>{{ p.code }} ({{ p.selling_price }} €)</i>
+                <i>{{ p.name }} ({{ p.code }})</i>
                 {% if not loop.last %}+{% endif %}
               {% endfor %}
             </p>
-            <p>
-              {{ formula.result.selling_price }} €
-              ({% trans %}instead of{% endtrans %} {{ formula.max_selling_price}} €)
-            </p>
           </div>
           {% if user.has_perm("counter.delete_productformula") %}
             <button

counter/templates/counter/product_form.jinja

@@ -54,7 +54,12 @@
     </div>
     <div class="form-group">
       <div>
-        {{ form.is_always_shown.as_field_group() }}
+        {{ form.is_always_shown.errors }}
+        <div class="row gap">
+          {{ form.is_always_shown }}
+          <label for="{{ form.is_always_shown.id_for_label }}">{{ form.is_always_shown.label }}</label>
+        </div>
+        <span class="helptext">{{ form.is_always_shown.help_text }}</span>
       </div>
     </div>
     {%- if form.DELETE -%}

counter/tests/test_formula.py

@@ -7,12 +7,7 @@ from counter.forms import ProductFormulaForm
 class TestFormulaForm(TestCase):
     @classmethod
     def setUpTestData(cls):
-        cls.products = product_recipe.make(
-            selling_price=iter([1.5, 1, 1]),
-            special_selling_price=iter([1.4, 0.9, 0.9]),
-            _quantity=3,
-            _bulk_create=True,
-        )
+        cls.products = product_recipe.make(_quantity=3, _bulk_create=True)
 
     def test_ok(self):
         form = ProductFormulaForm(
@@ -26,23 +21,6 @@ class TestFormulaForm(TestCase):
         assert formula.result == self.products[0]
         assert set(formula.products.all()) == set(self.products[1:])
 
-    def test_price_invalid(self):
-        self.products[0].selling_price = 2.1
-        self.products[0].save()
-        form = ProductFormulaForm(
-            data={
-                "result": self.products[0].id,
-                "products": [self.products[1].id, self.products[2].id],
-            }
-        )
-        assert not form.is_valid()
-        assert form.errors == {
-            "result": [
-                "Le résultat ne peut pas être plus cher "
-                "que le total des autres produits."
-            ]
-        }
-
     def test_product_both_in_result_and_products(self):
         form = ProductFormulaForm(
             data={

counter/views/click.py

@@ -73,7 +73,7 @@ class CounterClick(
         kwargs["form_kwargs"] = {
             "customer": self.customer,
             "counter": self.object,
-            "allowed_prices": {price.id: price for price in self.products},
+            "allowed_prices": {price.id: price for price in self.prices},
         }
         return kwargs
 
@@ -103,7 +103,7 @@ class CounterClick(
         ):
             return redirect(obj)  # Redirect to counter
 
-        self.products = obj.get_prices_for(self.customer)
+        self.prices = obj.get_prices_for(self.customer)
 
         return super().dispatch(request, *args, **kwargs)
 
@@ -206,12 +206,12 @@ class CounterClick(
     def get_context_data(self, **kwargs):
         """Add customer to the context."""
         kwargs = super().get_context_data(**kwargs)
-        kwargs["products"] = self.products
+        kwargs["prices"] = self.prices
         kwargs["formulas"] = ProductFormula.objects.filter(
-            result__in=self.products
+            result__in=[p.product_id for p in self.prices]
         ).prefetch_related("products")
         kwargs["categories"] = defaultdict(list)
-        for price in kwargs["products"]:
+        for price in self.prices:
             kwargs["categories"][price.product.product_type].append(price)
         kwargs["customer"] = self.customer
         kwargs["cancel_url"] = self.get_success_url()

rootplace/tests/test_merge_users.py

@@ -33,8 +33,6 @@ class TestMergeUser(TestCase):
         cls.club = baker.make(Club)
         cls.eboutic = Counter.objects.get(name="Eboutic")
         cls.barbar = Product.objects.get(code="BARB")
-        cls.barbar.selling_price = 2
-        cls.barbar.save()
         cls.root = User.objects.get(username="root")
         cls.to_keep = User.objects.create(
             username="to_keep", password="plop", email="u.1@utbm.fr"