Mall - Shopping Cart - shopping cart functionality analysis

2. Functional analysis Cart

2.1. Demand

Description of Requirement:

• Users can add items to the shopping cart signed in
  • Into the database
  • Redis into (taken)
• Users can add items to the shopping cart while signed out
  • Put localstorage
• Users can use the shopping cart settlement orders together
• Users can check their cart
• Users can modify the number of purchases in a shopping cart.
• Users can delete item in a shopping cart.
• Demonstrate a product offering in the shopping cart
• Changes in commodity prices prompted cart

2.2 flowchart

This picture depicts two main functions: to add items to the shopping cart, shopping cart query.

New Products:

• Determine whether the login
  • They are: add items to the back of the Redis
  • No: you add items to the local Localstorage

Either add, after the completion of all required queries cart list:

• Determine whether the login
  • No: direct query and display data localstorage
  • Is: logged in, you need to look at whether there is local data,
    • There are: the need to submit to a background Add to redis, merge data, and then query
    • No: go directly to the background check redis, then returns