Recommendation-System

A system that can be used to build user profiles and accordingly recommend items to buy/watch/read that matches their users’ interests

• Recommend an item to the user based on their previous purchases if the current cart is empty
  
• If there are items already added to the users cart, recommend an item to the user based on their previous purchases and the current items in the cart
  
• Recommend an item to the user based on the intersection between the items they previously purchased and other users’ purchases
  ## Running the tests Given the below toy dataset where users is a list of the users, items is a list of the items that the users can buy and purchases is a list mapping each user to a list of all his/her previous shopping carts.
  users = ["A", "B", "C", "D", "E"]
  
  items = ["suit", "dress", "shoes", "T−shirt", "Jacket", "skirt", "shorts", "shirt", "trousers", "scarf", "mp3player", "TV", "LCDscreen", "headphone", "laptop", "keyboard", "mouse", "cellphone", "headphone", "earphone", "milk", "cheese", "bread", "chocolate", "meat", "flour", "sugar", "oil", "tomatoes", "chicken", "yogurt", "cereal", "beans", "fool", "eggs"]
  
  purchases = [("A", [["dress", "shoes"], ["milk", "cheese", "eggs"]]), ("B", [["earphone", "mouse", "laptop"], ["mp3player"]]), ("C", [["bread", "milk"], ["shoes"]]), ("D", [["milk", "meat", "chicken", "yogurt"], ["beans", "cereal", "flour", "sugar"], ["tomatoes", "oil", "chicken"]]), ("E", []) ]
  ### Functions: #### recommend recommend :: String -> [String] -> String
  The function recommend takes a user and his/her cart and recommend to the user an item accordingly hs > recommend "A" ["earphone"] "laptop" > recommend "E" ["dress"] "cereal" > recommend "A" ["earphone"] "tomatoes" #### recommendEmptyCart recommendEmptyCart :: String -> String
  When the users cart is empty, the function recommendEmptyCart could be used to recommend an item to the user by 50% based on previously purchased items and 50% based on the intersection between the items purchased by the current user and other users. hs > recommendEmptyCart "E" "laptop" > recommendEmptyCart "E" "chicken" > recommendEmptyCart "A" "tomatoes" #### recommendBasedOnItemsInCart recommendBasedOnItemsInCart :: String -> [String] -> String
  The function recommendBasedOnItems is used to recommend an item to the user based on the items currently in the user’s cart and the previously purchased items by 50% and the other 50% based on the intersection between the items purchased by the current user and other users. hs > recommendBasedOnItemsInCart "A" ["dress"] "shoes" > recommendBasedOnItemsInCart "A" [] "sugar #### recommendBasedOnUsers recommendBasedOnUsers :: String -> String
  The function recommendBasedOnUsers is used to recommend an item to the user based on the intersection between the items purchased by the current user and other users. hs > recommendBasedOnUsers "B" "meat" > recommendBasedOnUsers "A" "meat" > recommendBasedOnUsers "A" "chicken" > recommendBasedOnUsers "C" "earphone" ## Acknowledgment This project outline was designed by the MET department at the German University in Cairo link.

Built With

• haskell