User-story.md

-user story
+template : "As a <role>, I want <goal/desire> so that <benefit>"
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+
+
+User stories: 
+As a `user`, I want to :
+- browse the catalog to see the summary of multiple goods sold.
+- search by keywords to look up the goods.
+- search by any categories to look for a specific type of goods.
+- search by goods with a specific range of price.
+- sort the goods by price, by sales.
+- have a personal account.
+- save my delivery details and contacts in my personal account.
+- add and remove goods to and from the shopping cart. 
+- edit the number of goods in the shopping cart.
+- save the shopping cart when I close the app.
+- purchase the goods in my shopping cart.
+- be able to comment on the goods I purchased.
+- view the details and comments by other users for a specific good. 
+- be able to add some goods to “my favorite”.
+- browse and edit my account information after login.
+- make payments through credit cards.
+- login / logout
+- register for a new account
+
+As an `admin`, I want to:
+- add specific goods
+- update specific goods
+- delete specific goods
+- search specific goods by category
+- search specific goods by keyword
+- search specific goods by brand(s)
+- search specific goods sorted by price
+- search specific goods sorted by sales
+- search specific goods by specific price range
+- add specific category
+- update specific category
+- delete specific category