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| {-# LANGUAGE OverloadedStrings #-} | |
| module Main where | |
| import System.Exit | |
| import System.IO | |
| import Data.Char | |
| import Database.SQLite.Simple | |
| import Text.RawString.QQ | |
| import Data.Text (Text) | |
| import qualified Data.Text as T | |
| import Database.SQLite.Simple.Types | |
| data User = | |
| User { | |
| userId :: Integer | |
| , username :: Text | |
| , shell :: Text | |
| , homedirectory :: Text | |
| , realName :: Text | |
| , phone :: Text | |
| } deriving (Eq, Show) | |
| instance FromRow User where | |
| fromRow = User <$> field | |
| <*> field | |
| <*> field | |
| <*> field | |
| <*> field | |
| <*> field | |
| instance ToRow User where | |
| toRow (User id_ username shell homeDir realName phone) = | |
| toRow (id_, username, shell, homeDir, realName, phone) | |
| updateUser :: Query | |
| updateUser = "UPDATE users\ | |
| \ SET username = :uname, shell = :shell, homeDirectory = :hd, realName = :rname, phone = :ph WHERE username = :uname;" | |
| main :: IO () | |
| main = do | |
| hSetBuffering stdin LineBuffering | |
| conn <- open "finger.db" | |
| putStrLn "Enter the username you want to edit or delete : " | |
| chknm <- getLine | |
| res <- query conn ("SELECT * from users where username=(?);") (Only (T.pack chknm)) :: IO [User] | |
| if null res then main else return () | |
| putStrLn "Enter 1 to edit, 2 to delete : " | |
| choice <- getChar | |
| _ <- getChar | |
| case (ord choice) - 48 of | |
| 1 -> return () | |
| 2 -> do | |
| execute conn ("DELETE from users where username=(?);") (Only (T.pack chknm)) | |
| rows <- query_ conn ("SELECT * from users;") :: IO [User] | |
| mapM_ print (rows :: [User]) | |
| Database.SQLite.Simple.close conn | |
| exitSuccess | |
| _ -> main | |
| putStrLn "Enter the shell : " | |
| ishell <- getLine | |
| putStrLn "Enter home directory : " | |
| ihome <- getLine | |
| putStrLn "Enter the real name : " | |
| irname <- getLine | |
| putStrLn "Enter the phone number : " | |
| iphone <- getLine | |
| executeNamed conn updateUser [":uname" := T.pack chknm, ":shell" := T.pack ishell, ":hd" := T.pack ihome, ":rname" := T.pack irname, ":ph" := T.pack iphone] | |
| rows <- query_ conn ("SELECT * from users;") :: IO [User] | |
| mapM_ print (rows :: [User]) | |
| Database.SQLite.Simple.close conn |
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