Merge branch 'branch-Level-7'

Author: Geinzit

src/main/java/huan/main/Huan.java

@@ -5,9 +5,15 @@
 import java.util.Scanner;
 import java.util.ArrayList;
 import java.util.List;
+import java.io.IOException;
+import java.io.FileReader;
+import java.io.BufferedReader;
+import java.io.FileWriter;
+import java.io.BufferedWriter;
 public class Huan {
     private static List<Task> tasks = new ArrayList<>();
 
+    private static String taskFile = "tasklist.txt";
     public static Boolean isIndexValid(int index) {
         return index >= 1 && index <= tasks.size();
     }
@@ -41,7 +47,44 @@ public static void listTasks() {
             }
         }
     }
-    public static void readProcessCommand() {
+
+    public static void writeTasks() {
+        try {
+            BufferedWriter writer = new BufferedWriter(new FileWriter(taskFile));
+            for (Task task : tasks) {
+                writer.write(task.writeLine());
+                writer.newLine();
+            }
+            writer.flush();
+        }catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void processLine(String line) throws Exception{
+        String[] words = line.split(" ");
+        String suffixWord = line.substring(words[0].length() + 1);
+
+        if (words[0].length() != 2 || (words[0].charAt(1) != 'T' && words[0].charAt(1) != 'F')) {
+            throw new Exception();
+        }
+
+        switch (words[0].charAt(0)) {
+        case ('T'):
+            addTask(new TodoTask(suffixWord, words[0].charAt(1) == 'T'));
+            break;
+        case ('D'):
+            addTask(new DeadlineTask(suffixWord, words[0].charAt(1) == 'T'));
+            break;
+        case ('E'):
+            addTask(new EventTask(suffixWord, words[0].charAt(1) == 'T'));
+            break;
+        default:
+            throw new Exception();
+        }
+    }
+
+    public static void readProcessCommands() {
 
         Scanner scanner = new Scanner(System.in);
         while(true) {
@@ -79,6 +122,7 @@ public static void readProcessCommand() {
                     } else {
                         tasks.get(markIndex - 1).setIsDone(true);
                         System.out.println("Set task number " + markIndex + ": " + tasks.get(markIndex - 1).getName() + " as done.");
+                        writeTasks();
                     }
                 } catch (Exception e){
                     System.out.println("Incorrect format! Should be 'mark *n', where n is the index of the task you wish to mark as finished.");
@@ -92,6 +136,7 @@ public static void readProcessCommand() {
                     } else {
                         tasks.get(unmarkIndex - 1).setIsDone(false);
                         System.out.println("Set task number " + unmarkIndex + ": " + tasks.get(unmarkIndex - 1).getName() + " as not done.");
+                        writeTasks();
                     }
                 } catch (Exception e){
                    System.out.println("Incorrect format! Should be 'unmark *n', where n is the index of the task you wish to mark as unfinished.");
@@ -105,12 +150,14 @@ public static void readProcessCommand() {
                 TodoTask todoTask = new TodoTask(suffixWord, false);
                 addTask(todoTask);
                 System.out.println("Added todo type task with name: " + todoTask.getName());
+                writeTasks();
                 break;
             case ("event"):
                 try {
                     EventTask eventTask = new EventTask(suffixWord, false);
                     addTask(eventTask);
                     System.out.println("Added event type task with name: " + eventTask.getName());
+                    writeTasks();
                 } catch (Exception e) {
                     System.out.println("Incorrect format! Should be 'event *event_name /from *start_time /to *end_time'.");
                 }
@@ -120,6 +167,7 @@ public static void readProcessCommand() {
                     DeadlineTask deadlineTask = new DeadlineTask(suffixWord, false);
                     addTask(deadlineTask);
                     System.out.println("Added deadline type task with name: " + deadlineTask.getName());
+                    writeTasks();
                 } catch (Exception e) {
                     System.out.println("Incorrect format! Should be 'deadline *task_name /by *deadline_time'");
                 }
@@ -151,6 +199,20 @@ public static void main(String[] args) {
         String botName = "Huan";
         System.out.println("Hello! I'm " + botName + ", a chat bot");
 
-        readProcessCommand();
+        try (BufferedReader reader= new BufferedReader(new FileReader(taskFile))){
+            String line;
+            try {
+                while ((line = reader.readLine()) != null) {
+                    processLine(line);
+                }
+            } catch (Exception e) {
+                System.out.println("Corrupt task save file");
+                tasks.clear();
+            }
+
+        } catch (IOException e) {
+            tasks.clear();
+        }
+        readProcessCommands();
     }
 }

src/main/java/huan/task/DeadlineTask.java

@@ -38,10 +38,15 @@ public DeadlineTask(String nameWithDate, Boolean isDone) throws Exception{
         this.ddlTime = ddlTime.toString();
     }
 
+    @Override
     public void printTask() {
         System.out.println("[D][" + (getIsDone() ? "X" : " ") + "] " + getName() + " (by: " + ddlTime + ")");
     }
 
+    @Override
+    public String writeLine() {
+        return "D" + (getIsDone() ? "T" : "F") + " " + getName() + " /by " + ddlTime;
+    }
     public String getDdlTime() {
         return ddlTime;
     }

src/main/java/huan/task/EventTask.java

@@ -50,6 +50,11 @@ public void printTask() {
         System.out.println("[E][" + (getIsDone() ? "X" : " ") + "] " + getName() + " (from: " + startTime + " to: " + endTime + ")");
     }
 
+    @Override
+    public String writeLine() {
+        return "E" + (getIsDone() ? "T" : "F") + " " + getName() + " /from " + startTime + " /to " + endTime;
+    }
+
     public void setStartTime(String startTime) {
         this.startTime = startTime;
     }

src/main/java/huan/task/Task.java

@@ -38,6 +38,11 @@ public int getTaskType() {
     public void printTask() {
         System.out.println("[" + (isDone ? "X" : " ") + "] " + name);
     }
+
+    public String writeLine() {
+        return null;
+    }
+
     public Task() {
         setName("task");
         setIsDone(false);

src/main/java/huan/task/TodoTask.java

@@ -5,7 +5,14 @@ public TodoTask(String name, Boolean isDone) {
         super(name, isDone);
         setTaskType(1);
     }
+
+    @Override
     public void printTask() {
         System.out.println("[T][" + (getIsDone() ? "X" : " ") + "] " + getName());
     }
+
+    @Override
+    public String writeLine() {
+        return "T" + (getIsDone() ? "T" : "F") + " " + getName();
+    }
 }