Use debts to compute and solve the balances

copanier/__init__.py

@@ -9,6 +9,9 @@ from roll import Roll, Response, HttpError
 from roll.extensions import traceback, simple_server, static
 from slugify import slugify
 
+from debts.solver import order_balance, check_balance, reduce_balance
+from collections import defaultdict
+from functools import partial
 
 from . import config, reports, session, utils, emails, loggers, imports
 from .models import Delivery, Order, Person, Product, ProductOrder, Groups,  Group
@@ -492,6 +495,7 @@ async def import_commande(request, response, id):
     response.message(f"Yallah! La commande de {email} a bien été importée !")
     response.redirect = f"/livraison/{delivery.id}"
 
+
 @app.route("/livraison/{id}/importer/commandes", methods=["POST"])
 @staff_only
 async def import_multiple_commands(request, response, id):
@@ -556,20 +560,42 @@ async def adjust_product(request, response, id, ref):
         response.html("adjust_product.html", {"delivery": delivery, "product": product})
 
 
-@app.route("/livraison/{id}/solde", methods=["GET", "POST"])
+@app.route("/livraison/{id}/solde", methods=["GET"])
 @staff_only
 async def delivery_balance(request, response, id):
     delivery = Delivery.load(id)
+    groups = request['groups']
     delivery_url = f"/livraison/{delivery.id}"
-    if request.method == "POST":
-        form = request.form
-        for email, order in delivery.orders.items():
-            order.paid = form.bool(email, False)
-        delivery.persist()
-        response.message(f"Les soldes ont bien été mis à jour!")
-        response.redirect = delivery_url
-    else:
-        response.html("delivery_balance.html", {"delivery": delivery})
+
+    balance = []
+    for group_id, order in delivery.orders.items():
+        balance.append((group_id, order.total(delivery.products) * -1))
+    
+    for producer in delivery.producers.values():
+        group = groups.get_user_group(producer.referent)
+        group_id = group.id if group else producer.referent
+        amount = delivery.total_for_producer(producer.id)
+        if amount:
+            balance.append((group_id, amount))
+    
+    debiters, crediters = order_balance(balance)
+    check_balance(debiters, crediters)
+    results = reduce_balance(debiters[:], crediters[:])
+
+    results_dict = defaultdict(partial(defaultdict, float))
+
+    for debiter, amount, crediter in results:
+        results_dict[debiter][crediter] = amount
+
+    # from pdb import set_trace; set_trace()
+
+    response.html("delivery_balance.html", {
+        "delivery": delivery,
+        "debiters": debiters,
+        "crediters": crediters,
+        "results": results_dict,
+        "groups": groups.groups,
+    })
 
 
 @app.route("/livraison/{id}/solde.xlsx", methods=["GET"])

copanier/templates/delivery.html

@@ -48,11 +48,9 @@
             {% include "includes/modal_copy_emails.html" %}
         {% endwith %}
     </li>
-    {% if delivery.is_passed %}
     <li>
-        <a href="/livraison/{{ delivery.id }}/solde"><i class="icon-wallet"></i> Gérer les soldes</a>
+        <a href="/livraison/{{ delivery.id }}/solde"><i class="icon-wallet"></i> Répartition des paiements</a>
     </li>
     {% endif %}
-    {% endif %}
 </ul>
 {% endblock body %}

copanier/templates/delivery_balance.html

@@ -1,25 +1,52 @@
 {% extends "base.html" %}
-
+{% block head %}
+<style media="screen">
+    table {
+        font-family:Arial, Helvetica, sans-serif;
+        color:#666;
+        font-size:12px;
+        text-shadow: 1px 1px 0px #fff;
+        background:#eaebec;
+        box-shadow: 0 1px 2px #d1d1d1;
+    }
+    table tr {
+        text-align: center;
+        padding-left:20px;
+    }
+    table td:first-child {
+        text-align: left;
+        padding-left:20px;
+        border-left: 0;
+    }
+    table td {
+        padding:5px;
+        border-top: 1px solid #ffffff;
+        border-bottom:1px solid #e0e0e0;
+        border-left: 1px solid #e0e0e0;
+        background: #fafafa;
+    }
+    table tr:hover td {
+        background: #f2f2f2;
+    }
+        </style>
+{% endblock head %}
 {% block body %}
-<article>
-    <h3><a href="/livraison/{{ delivery.id }}">{{ delivery.producer }}</a> — Gérer les soldes</h3>
-    <form method="post">
-    <table>
-        <thead>
-            <tr><th>Personne</th><th>Montant</th><th>Soldée</th></tr>
-        </thead>
-        <tbody>
-            {% for email, order in delivery.orders.items() %}
+<h1><i class="icon-lightbulb"></i> Répartition des paiements</h1>
+<table>
     <tr>
-                <td>{{ email }}</td>
-                <td>{{ order.total(delivery.products) }} €</td>
-                <td class="with-input"><input type="checkbox" name="{{ email }}" {% if order.paid %}checked{% endif %}></td>
+        <td></td>
+        {% for crediter in crediters %}<td>{% if crediter[0] in groups %} {{ groups[crediter[0]].name }}{% else %}{{ crediter[0] }}{% endif %} (+{{ crediter[1] | round(2) }})</td>{% endfor %}
+    </tr>
+    {% for debiter in debiters %}
+    <tr>
+        <td>{% if debiter[0] in groups %} {{ groups[debiter[0]].name }}{% else %}{{ debiter[0] }}{% endif %} ({{ debiter[1] | round(2) }})</td>
+        {% for crediter in crediters %}
+        {% set due_amount = results[debiter[0]][crediter[0]] | round(2) %}
+
+        <td>{% if due_amount != 0.00 %}{{due_amount}}{% endif %}</td>
+        {% endfor %}
     </tr>
     {% endfor %}
-        </tbody>
-    </table>
-    <input type="submit" value="Enregistrer" class="primary">
-    <a href="/livraison/{{ delivery.id }}/solde.xlsx" class="button"><i class="icon-download"></i>&nbsp;Exporter</a>
-    </form>
-</article>
+</table>
+
 {% endblock body %}

setup.cfg

@@ -14,6 +14,7 @@ install_requires =
     ujson==1.35
     minicli==0.4.4
     python-slugify==3.0.2
+    debts==0.4
 
 [options.extras_require]
 dev =