add0

app/Main.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE OverloadedStrings #-} 
 
 module Main(main, parseTask, serializeTask, getPriority, comparePriority, TaskMap) where
 
@@ -26,20 +26,27 @@ main = do
     putStrLn "Welcome to the Haskell Todo App"
     putStrLn "1. Display tasks"
     putStrLn "2. Add task"
-    putStrLn "3. Filter tasks by tag"
-    putStrLn "4. Sort tasks by priority"
-    putStrLn "5. Exit"
+    putStrLn "3. Add task (Manual)"
+    putStrLn "4. Edit task"
+    putStrLn "5. Filter tasks by tag"
+    putStrLn "6. Sort tasks by priority"
+    putStrLn "7. Remove task"
+    putStrLn "8. Exit"
     putStr "Choose an option: "
     hFlush stdout
     option <- getLine
     case option of
         "1" -> displayTasks
         "2" -> addTask
-        "3" -> filterTasksByTag
-        "4" -> sortTasksByPriority
-        "5" -> putStrLn "Goodbye!"
+        "3" -> addTaskWithManual
+        "4" -> editTask
+        "5" -> filterTasksByTag
+        "6" -> sortTasksByPriority
+        "7" -> removeTask
+        "8" -> putStrLn "Goodbye!"
         _   -> putStrLn "Invalid option" >> main
 
+
 displayTasks :: IO ()
 displayTasks = do
     exists <- doesFileExist todoFile
@@ -50,12 +57,16 @@ displayTasks = do
             putStrLn "Tasks:"
             mapM_ (putStrLn . showTask) (Map.toList taskMap)
         else putStrLn "No tasks found."
-    main
-  where
-    handleReadError :: IOException -> IO Text
-    handleReadError e = do
-        putStrLn $ "Error reading file: " ++ show e
-        return ""
+    putStrLn " -------------- "
+    putStrLn "Press Enter"
+    option <- getLine
+    case option of
+        _ -> main
+   where
+        handleReadError :: IOException -> IO Text
+        handleReadError e = do
+            putStrLn $ "Error reading file: " ++ show e
+            return ""
 
 addTask :: IO ()
 addTask = do
@@ -72,7 +83,11 @@ addTask = do
             catch (TIO.writeFile todoFile (serializeTask newTaskMap)) handleWriteError
         else catch (TIO.writeFile todoFile (pack task <> "\n")) handleWriteError
     putStrLn "Task added."
-    main
+    putStrLn " -------------- "
+    putStrLn "Press Enter"
+    option <- getLine
+    case option of
+        _ -> main
   where
     handleReadError :: IOException -> IO Text
     handleReadError e = do
@@ -82,6 +97,70 @@ addTask = do
     handleWriteError :: IOException -> IO ()
     handleWriteError e = putStrLn $ "Error writing file: " ++ show e
 
+addTaskWithManual :: IO ()
+addTaskWithManual = do
+    putStrLn "First, optionally you can add priority to the task you want to add. To do so, put letter inside '()'"
+    putStrLn "Tasks without priority will be displayed first."
+    putStrLn "Second, write your task."
+    putStrLn "Third, optionally you can add tags to your task. To do so, put '+'and write your tag."
+    putStrLn "Tasks can have more than one tag."
+    putStrLn "Example: (C) go shopping +shop +sunday"
+    putStrLn " -------------- "
+    putStrLn "Press Enter to add your task or x to go back to menu"
+    option <- getLine
+    case option of
+        "x" -> main
+        _ -> addTask
+
+
+editTask :: IO ()
+editTask = do
+    exists <- doesFileExist todoFile
+    if exists
+        then do
+            contents <- catch (TIO.readFile todoFile) handleReadError
+            let taskMap = parseTask contents
+            putStrLn "Existing tasks: "
+            mapM_ (putStrLn . showTaskId) (Map.toList taskMap)
+
+            putStr "Enter the ID of the task you wish to edit: "
+            hFlush stdout
+            taskIdStr <- getLine
+            let taskId = read taskIdStr :: Int
+
+            putStrLn ""
+
+            if Map.member taskId taskMap
+                then do
+                    putStrLn "Enter the new task description: "
+                    newTask <- getLine
+                    let newTaskMap = Map.insert taskId (pack newTask) taskMap
+                    catch (TIO.writeFile todoFile (serializeTask newTaskMap)) handleWriteError
+                    putStrLn "Task edited."
+                else do
+                    putStrLn "Task of this ID doesn't exist"
+                    putStrLn "Do you wish to try again? Press Enter if yes or x to go back to menu"
+                    option <- getLine
+                    case option of
+                        "x" -> main
+                        _ -> editTask
+
+        else putStrLn "No tasks found."
+    putStrLn " -------------- "
+    putStrLn "Press Enter"
+    option <- getLine
+    case option of
+        _ -> main
+  where
+    handleReadError :: IOException -> IO Text
+    handleReadError e = do
+        putStrLn $ "Error reading file: " ++ show e
+        return ""
+
+    handleWriteError :: IOException -> IO ()
+    handleWriteError e = putStrLn $ "Error writing file: " ++ show e
+
+
 filterTasksByTag :: IO ()
 filterTasksByTag = do
     putStr "Enter the tag to filter by (e.g., +GarageSale): "
@@ -96,13 +175,20 @@ filterTasksByTag = do
             putStrLn "Filtered tasks:"
             mapM_ (putStrLn . showTask) (Map.toList filteredTasks)
         else putStrLn "No tasks found."
-    main
+    putStrLn " -------------- "
+    putStrLn "Press Enter"
+    option <- getLine
+    case option of
+        _ -> main
   where
     handleReadError :: IOException -> IO Text
     handleReadError e = do
         putStrLn $ "Error reading file: " ++ show e
         return ""
 
+    handleWriteError :: IOException -> IO ()
+    handleWriteError e = putStrLn $ "Error writing file: " ++ show e
+
 sortTasksByPriority :: IO ()
 sortTasksByPriority = do
     exists <- doesFileExist todoFile
@@ -114,13 +200,65 @@ sortTasksByPriority = do
             putStrLn "Sorted tasks by priority:"
             mapM_ (putStrLn . showTask) sortedTasks
         else putStrLn "No tasks found."
-    main
+    putStrLn " -------------- "
+    putStrLn "Press Enter"
+    option <- getLine
+    case option of
+        _ -> main
   where
     handleReadError :: IOException -> IO Text
     handleReadError e = do
         putStrLn $ "Error reading file: " ++ show e
         return ""
 
+removeTask :: IO ()
+removeTask = do
+
+    exists <- doesFileExist todoFile
+    if exists
+        then do
+            contents <- catch (TIO.readFile todoFile) handleReadError
+            let taskMap = parseTask contents
+            putStrLn "Existing tasks: "
+            mapM_ (putStrLn . showTaskId) (Map.toList taskMap)
+
+            putStr "Enter the ID of the task you wish to remove: "
+            hFlush stdout
+            taskIdStr <- getLine
+            let taskId = read taskIdStr :: Int
+
+            putStrLn ""
+
+            if Map.member taskId taskMap
+                then do
+                    let newTaskMap = Map.delete taskId taskMap
+                    catch (TIO.writeFile todoFile (serializeTask newTaskMap)) handleWriteError
+                    putStrLn "Task removed."
+                else do
+                    putStrLn "Task of this ID doesn't exist"
+                    putStrLn "Do you wish to try again? Press Enter if yes or x to go back to menu"
+                    option <- getLine
+                    case option of
+                        "x" -> main
+                        _ -> removeTask
+
+        else putStrLn "No tasks found."
+    putStrLn " -------------- "
+    putStrLn "Press Enter"
+    option <- getLine
+    case option of
+        _ -> main
+  where
+    handleReadError :: IOException -> IO Text
+    handleReadError e = do
+        putStrLn $ "Error reading file: " ++ show e
+        return ""
+
+    handleWriteError :: IOException -> IO ()
+    handleWriteError e = putStrLn $ "Error writing file: " ++ show e
+
+
+
 comparePriority :: Text -> Text -> Ordering
 comparePriority t1 t2 = comparing getPriority t1 t2
 
@@ -136,4 +274,7 @@ serializeTask :: TaskMap -> Text
 serializeTask = Data.Text.unlines . map snd . Map.toList
 
 showTask :: (Int, Text) -> String
-showTask (_, task) = unpack task
+showTask (_, task) = unpack task
+
+showTaskId :: (Int, Text) -> String
+showTaskId (taskId, task) = show taskId ++ ": " ++ unpack task