Merge branch 'branch-Level-9'

src/main/java/FindCommand.java

@@ -0,0 +1,25 @@
+/**
+ * Represents the Command for searching Tasks with a specified keyword.
+ * A sub-class of Command.
+ */
+public class FindCommand extends Command {
+
+    /**
+     * Overridden execute method from Command to search for Task objects whose
+     * description matches the search term. The method will output all Tasks that
+     * contain the search term in the description. It will throw an exception if
+     * the search term is empty.
+     * @param storage Storage object for saving purposes
+     * @param tasks Contains the list of tasks
+     * @param ui Holds Ui printing method and user input field
+     * @throws DukeException If searchTerm is empty
+     */
+    @Override
+    public void execute(Storage storage, TaskList tasks, Ui ui) throws DukeException {
+        String searchTerm = ui.readDesc().trim();
+        if(searchTerm.isEmpty()){
+            throw new DukeException("Search term cannot be blank.");
+        }
+        tasks.searchTaskList(searchTerm);
+    }
+}

src/main/java/Parser.java

@@ -17,6 +17,8 @@ public static Command parse(String userCmd) throws DukeException {
             return new DoneCommand();
         case "delete":
             return new DeleteCommand();
+        case "find":
+            return new FindCommand();
         case "exit":
             return new ExitCommand();
         case "todo":

src/main/java/Task.java

@@ -56,6 +56,14 @@ public boolean getIsDone() {
         return isDone;
     }
 
+    /**
+     * Returns the Task's description
+     * @return description of Task
+     */
+    public String getDescription() {
+        return description;
+    }
+
     /**
      * Returns the Task object in a String format for saving into a text file.
      * @return description and status of Task for saving

src/main/java/TaskList.java

@@ -61,6 +61,21 @@ public void showTaskList() {
         }
     }
 
+    /**
+     * Prints out the Tasks whose description matches the search term
+     * @param searchTerm Keyword by user for search
+     */
+    public void searchTaskList(String searchTerm) {
+        System.out.println("Here are the matching tasks in your list:");
+        int noOfSearches = 1;
+        for(int i = 0; i < list.size(); i++){
+            if(list.get(i).getDescription().contains(searchTerm)){
+                System.out.println((noOfSearches) + "." + list.get(i));
+                noOfSearches += 1;
+            }
+        }
+    }
+
     /**
      * Sets boolean variable isDone of selected Task object to true.
      * @param doneIndex Index of selected Task object, 1-based index