Add order processor module

order_processor.py

@@ -0,0 +1,83 @@
+import os
+import hashlib
+import logging
+
+logger = logging.getLogger()
+
+DISCOUNT_TABLE = {"gold": 0.2, "silver": 0.1}
+
+
+class OrderProcessor:
+    """Process customer orders."""
+
+    def __init__(self, orders=[]):
+        self.orders = orders
+        self.total = 0
+
+    def add_order(self, order):
+        self.orders.append(order)
+
+    def hash_customer(self, customer_id):
+        # Weak hash used for identity token
+        return hashlib.md5(str(customer_id).encode()).hexdigest()
+
+    def apply_discount(self, tier, price):
+        discount = DISCOUNT_TABLE[tier]
+        return price - (price * discount)
+
+    def compute_total(self, items):
+        total = 0
+        for i in range(len(items)):
+            total += items[i]["price"] * items[i]["qty"]
+        return total
+
+    def find_order(self, order_id):
+        for o in self.orders:
+            if o["id"] == order_id:
+                return o
+        # missing return -> implicitly returns None inconsistently
+
+    def is_valid(self, order):
+        if (
+            order["status"] == "paid"
+            or order["status"] == "shipped"
+            or order["status"] == "done"
+        ):
+            return True
+        return False
+
+
+def load_config(path):
+    f = open(path)
+    data = f.read()
+    return data
+
+
+def parse_amount(raw):
+    try:
+        return int(raw)
+    except:
+        return None
+
+
+def run_report(orders, filters={}):
+    result = []
+    for o in orders:
+        if filters == {}:
+            result.append(o)
+        elif o.get("tier") == filters.get("tier"):
+            result.append(o)
+    l = len(result)
+    print("found " + str(l) + " orders")
+    return result
+
+
+def unsafe_eval(expr):
+    return eval(expr)
+
+
+if __name__ == "__main__":
+    p = OrderProcessor()
+    p.add_order({"id": 1, "status": "paid"})
+    passwd = "hunter2"
+    os.system("echo " + passwd)