[kevinz420] iP

src/main/java/Duke.java

@@ -1,10 +1,119 @@
+import java.util.HashMap;
+import java.util.Scanner;
+
 public class Duke {
+    private static Task[] tasks = new Task[100];
+    private static int numTasks = 0;
     public static void main(String[] args) {
-        String logo = " ____        _        \n"
-                + "|  _ \\ _   _| | _____ \n"
-                + "| | | | | | | |/ / _ \\\n"
-                + "| |_| | |_| |   <  __/\n"
-                + "|____/ \\__,_|_|\\_\\___|\n";
-        System.out.println("Hello from\n" + logo);
+        printGreeting();
+
+        Scanner in = new Scanner(System.in);
+        String line;
+        while (in.hasNextLine()) {
+            line = in.nextLine();
+            if (line.equals("bye")) {
+                break;
+            }
+
+            if (line.equals("list")) {
+                printTasks();
+            } else {
+                handleCommand(line);
+            }
+        }
+        System.out.println("Bye. Hope to see you again soon!");
+    }
+
+    private static void handleCommand(String line) {
+        int divider = line.indexOf(" ");
+
+        if (line.contains("mark")) {
+            int idx = Integer.parseInt(line.substring(divider + 1)) - 1;
+            if (idx < 0 || tasks[idx] == null) {
+                System.out.println("Sorry! That's not a valid task");
+                return;
+            }
+
+            markTask(idx, line.startsWith("mark"));
+            return;
+        }
+        if (line.startsWith("todo")){
+            addTask(new Todo(line.substring(divider + 1)));
+            return;
+        }
+
+        HashMap<String, String> parameters = parseParameters(line);
+        String description = parameters.get("description");
+        if (description == null) {
+            System.out.println("Sorry! Please provide a valid description");
+            return;
+        }
+        if (line.startsWith("deadline")) {
+            String by = parameters.get("by");
+            if (by == null) {
+                System.out.println("Sorry! Please provide a valid `by`");
+                return;
+            }
+            addTask(new Deadline(description, parameters.get("by")));
+        } else if (line.startsWith("event")) {
+            String from = parameters.get("from");
+            String to = parameters.get("to");
+            if (from == null || to == null) {
+                System.out.println("Sorry! Please provide a valid `from` and/or `to`");
+                return;
+            }
+            addTask(new Event(description, from, to));
+        }
+    }
+
+    private static HashMap<String, String> parseParameters(String line) {
+        HashMap<String, String> fieldToValue = new HashMap<>();
+
+        int startDescription = line.indexOf(" ");
+        int endOfDescription = line.indexOf(" /");
+        fieldToValue.put("description", line.substring(startDescription + 1, endOfDescription));
+
+        String[] splitParams = line.split(" /");
+        for (int i = 1; i < splitParams.length; i++) {
+            String rawParam = splitParams[i];
+            int divider = rawParam.indexOf(" ");
+
+            String field = rawParam.substring(0, divider);
+            String value = rawParam.substring(divider + 1);
+            fieldToValue.put(field, value);
+        }
+
+        return fieldToValue;
+    }
+
+    public static void markTask(int index, boolean isDone) {
+        tasks[index].setStatus(isDone);
+        if (isDone) {
+            System.out.println("Nice! I've marked this task as done:");
+        } else {
+            System.out.println("OK, I've marked this task as not done yet:");
+        }
+        System.out.println(tasks[index].getFormattedTask());
+    }
+
+    private static void printGreeting() {
+        System.out.println("Hello! I'm KevBot");
+        System.out.println("What can I do for you?");
+    }
+
+    public static void printTasks() {
+        for (int i = 0; i < tasks.length && tasks[i] != null; i++) {
+            System.out.println((i + 1) + ". " + tasks[i].getFormattedTask());
+        }
+    }
+
+    public static void addTask(Task task) {
+        if (numTasks == tasks.length) {
+            System.out.println("Sorry. The task list is all full");
+        }
+
+        tasks[numTasks] = task;
+        numTasks++;
+        System.out.println("Got it. I've added this task:\n" + task.getFormattedTask() + "\nNow you have " + numTasks + " tasks in the list.");
     }
 }