init

main.py

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+from pygrocy import Grocy
+from flask import Flask, render_template, request
+from pprint import pprint
+
+# Demo variables
+BARCODE = 2222
+USER_BAR_ID = 555
+
+#Global variables
+DEFAULT_AMOUNT = 1
+CASHBOX_USERID = 3
+
+g = Grocy("http://localhost", "BZzLkorATL66hSbKwIERoesALcIqNUPW91zONNNTHP0r9N6vk2", port=8080)
+
+
+# Write money movement into the ledger. TODO
+def write_ledger():
+    return True
+
+# Subtract the price from user account or add it to the cashier. Also write it to ledger.
+def prod_bill_user(prod, user):
+    start_balance = user['balance']
+    end_balance = start_balance - prod['price']
+    g.set_userfields('users', user['id'], 'balance', end_balance)
+    return(end_balance)
+
+# Add money paid for the product to the cashbox. 
+def prod_bill_cash(prod):
+    for user in g.users():
+        if user.id == CASHBOX_USERID:
+            cashbox = user
+            break
+
+    start_balance = float(g.get_userfields('users', cashbox.id)['balance'])
+    end_balance = start_balance + prod['price']
+    g.set_userfields('users', cashbox.id, 'balance', end_balance)
+
+
+# Receive barcode and user code from website and process it.
+def prod_consume(prod):
+    g.consume_product(product_id = prod['id'], amount = DEFAULT_AMOUNT)
+
+
+
+def user_by_barid(user_barid):
+    users = g.users()
+    users_data = []
+    # Get all users and their custom fields
+    for user in users:
+        user_fields = g.get_userfields('users', user.id)
+        if user_fields['accountingenabled']:
+            user_data = {
+                'accounting_enabled': user_fields['accountingenabled'],
+                'balance': float(user_fields['balance']),
+                'barid': user_fields['barid'],
+                'name': user.display_name,
+                'id': user.id
+            }
+            users_data.append(user_data)
+            
+    # Find user with selected barID
+    for user in users_data:
+        if user['barid'] == str(user_barid):
+            return user
+
+    # If no user with this barID and enabled accounting is found, return false
+    return False
+
+
+# Get data about product and price by barcode
+def prod_by_barcode(barcode):
+    prod = g.product_by_barcode(barcode)
+    sell_price = g.get_userfields('products', prod.id)['sellprice']
+    prod_data = {
+        'id': prod.id,
+        'name': prod.name,
+        'available': prod.available_amount,
+        'price': float(sell_price),
+        'barcode': barcode
+    }
+    return prod_data
+
+
+
+
+def main():
+    # Get product
+    prod = prod_by_barcode(BARCODE)
+    # print(prod)
+    # It would be good to check if the product is available here. In such case, throw some error and prompt for user action (write it on paper and report to staff)
+
+    # Find user
+    user = user_by_barid(USER_BAR_ID)
+    # print(user)
+
+    # Consume product
+    prod_consume(prod)
+
+    # Bill product to user
+    #prod_bill_user(prod, user)
+
+    # Bill product with cash
+    prod_bill_cash(prod)
+    
+
+app = Flask(__name__)
+
+@app.route('/')
+def index():
+    return render_template('index.html')
+
+@app.route('/checkout/', methods=['POST'])
+def scan():
+    barcode = request.form.get('barcode')
+    prod = prod_by_barcode(barcode)
+    if not prod:
+        print('Item not found')
+    return render_template('checkout.html', prod = prod)
+
+@app.route('/cash-payment/', methods=['POST'])
+def cash_payment():
+    barcode = request.form.get('barcode')
+    prod = prod_by_barcode(barcode)
+    prod_consume(prod)
+    prod_bill_cash(prod)
+    return render_template('cash-payment.html', prod = prod)
+
+@app.route('/account-payment/', methods=['POST'])
+def account_payment():
+    user_barid = request.form.get('barid')
+    barcode = request.form.get('barcode')
+    prod = prod_by_barcode(barcode)
+    user = user_by_barid(user_barid)
+    prod_consume(prod)
+    end_balance = prod_bill_user(prod, user)
+
+    return render_template('account-payment.html', prod = prod, user = user, balance = end_balance)
+
+if __name__ == '__main__':
+	app.run(host="0.0.0.0")

requirements.txt

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+flask
+pygrocy

templates/account-payment.html

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+{% extends 'base.html' %}
+
+{% block content %}
+<p>1ks {{prod.name}} odečten ze skladu</p>
+<p>{{prod.price}}Kč bylo zaplaceno z účtu {{user.name}}</p>
+<p>Zbývající kredit: {{balance}}Kč</p>
+
+<form action="/">
+    <input type="submit" value="Další!" autofocus/>
+  </form>
+
+{% endblock %}

templates/base.html

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+
+<!DOCTYPE html>
+<html lang="en" data-theme="dark">
+<head>
+    <meta charset="UTF-8">
+    <link rel="stylesheet" href="https://unpkg.com/@picocss/pico@1.*/css/pico.min.css">
+    <title>TrhBar</title>
+    <style>
+        .message {
+            padding: 10px;
+            margin: 5px;
+            background-color: #f3f3f3
+        }
+        nav a {
+            color: #d64161;
+            font-size: 3em;
+            margin-left: 50px;
+            text-decoration: none;
+        }
+
+    </style>
+</head>
+<body>
+    <main class="container">
+        {% block content %} {% endblock %}
+    </main>
+</body>
+</html>

templates/cash-payment.html

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+{% extends 'base.html' %}
+
+{% block content %}
+<p>1ks {{prod.name}} odečten ze skladu</p>
+<p>Hoď prosím do kasičky <b>{{prod.price}},- Kč</b></p>
+
+<form action="/">
+  <input type="submit" value="Další!" autofocus/>
+</form>
+
+
+{% endblock %}

templates/checkout.html

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+{% extends 'base.html' %}
+
+{% block content %}
+<section>
+  <div class="grid">
+    <div><h4>{{prod.name}}</h4></div>
+    <div><h4>Doporučená cena: {{prod.price}},- Kč</h4></div>
+  </div>
+</section>
+
+<section>
+
+    <div>
+      V hotovosti:
+      <form action="/cash-payment" method="post">
+        <input type="text" name="barcode" value="{{prod.barcode}}" hidden>
+        <input type="submit" value="Prachy do kasičky" >
+      </form> 
+    </div>
+  </section>
+
+  <section>
+    <div>
+      <form action="/account-payment" method="post">
+        <input type="text" name="barcode" value="{{prod.barcode}}" hidden>
+        <br>
+        Odečíst z účtu:
+        <input type="text" name="barid" autofocus><br>
+        <input type="submit" hidden>
+      </form> 
+    </div>
+  </section>
+
+{% endblock %}

templates/index.html

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+{% extends 'base.html' %}
+
+{% block content %}
+  <section>
+    Načti prosím čtečkou čárový kód
+  </section>
+  <form action="/checkout" method="post">
+    <input type="text" name="barcode" autofocus>
+  </form> 
+{% endblock %}