Add dir with some small projects

small-projects/maze-puzzle/src/service.py

@@ -0,0 +1,43 @@
+import re
+
+TOKEN_REGEX = re.compile("^[0-9A-F-]+$")
+
+class Service:
+    def __init__(self, product_detail_client, product_search_client):
+        self.product_detail_client = product_detail_client
+        self.product_search_client = product_search_client
+
+    def lookup(self, product_token):
+        """
+        Given a valid product token,
+        lookup product detail information from the product detail backend service.
+
+        - Results in Bad Request if the token is invalid
+        - Results in Not Found if the product is unknown to the backend service
+        """
+        if not TOKEN_REGEX.match(product_token):
+            return {"status": 400}
+
+        lookup_result = self.product_detail_client.lookup(product_token)
+        if lookup_result:
+            return {"status": 200, "product": lookup_result}
+        else:
+            return {"status": 404}
+
+    def search_by_price_range(self, lower_cents, upper_cents, start_record, num_records):
+        page_of_product_tokens = \
+            self.product_search_client.search_for_all_in_price_range(
+                lower_cents,
+                upper_cents,
+                start_record,
+                num_records)
+
+        product_detail_results = []
+        for product_token in page_of_product_tokens:
+            product_detail_results.append(self.lookup(product_token)["product"])
+
+        return {"status": 200, "products": product_detail_results}
+
+if __name__ == "__main__":
+    a = Service()
+    print(a.lookup('aaa'))