David Stern

src/main/java/com/booleanuk/core/TodoList.java

@@ -1,5 +1,108 @@
 package com.booleanuk.core;
 
+import java.util.*;
+
 public class TodoList {
 
+    Map<String, Boolean> tasks;
+
+    public TodoList(Map<String, Boolean> tasks) {
+        this.tasks = tasks;
+    }
+
+    public Boolean addTask(String taskName) {
+        taskName = taskName.strip().toLowerCase();
+        if (taskName.isBlank()) {
+            return null;
+        }
+
+        for (String key : tasks.keySet()) {
+            if (taskName.equals(key.toLowerCase())) {
+                return false;
+            }
+        }
+        tasks.put(taskName, false); // not completed by default
+        return true;
+    }
+
+    public List<String> getTasks() {
+        return new ArrayList<>(tasks.keySet());
+    }
+
+    public List<String> getCompletedTasks() {
+        List<String> completedTasks = new ArrayList<>();
+        for (String key : tasks.keySet()) {
+            if (tasks.get(key)) {
+                completedTasks.add(key);
+            }
+        }
+        return completedTasks;
+    }
+
+    public List<String> getIncompleteTasks() {
+        List<String> incompleteTasks = new ArrayList<>();
+        for (String key : tasks.keySet()) {
+            if (!tasks.get(key)) {
+                incompleteTasks.add(key);
+            }
+        }
+        return incompleteTasks;
+    }
+
+    public Boolean changeTaskStatus(String taskName) {
+        taskName = taskName.strip().toLowerCase();
+        if (taskName.isBlank())
+            return false;
+
+        for (String key : tasks.keySet()) {
+            if (taskName.equals(key.toLowerCase())) {
+                tasks.put(key, !tasks.get(key));
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public List<String> searchTask(String searchString) {
+        List<String> searchResults = new ArrayList<>();
+
+        for (String key : tasks.keySet()) {
+            if (key.toLowerCase().contains(searchString)) {
+                searchResults.add(key);
+            }
+        }
+
+        if (searchResults.isEmpty()) {
+            searchResults.add("No tasks found");
+        }
+
+        return searchResults;
+    }
+
+    public Boolean removeTask(String taskName) {
+        taskName = taskName.strip().toLowerCase();
+        if (taskName.isBlank()) {
+            return false;
+        }
+
+        for (String key : tasks.keySet()) {
+            if (taskName.equals(key.toLowerCase())) {
+                tasks.remove(key);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public List<String> getAllTasksOrdered(boolean descending) {
+
+        List<String> sortedTasks = new ArrayList<>(tasks.keySet());
+
+        if (!descending) {
+            return sortedTasks.stream().sorted().toList();
+        } else {
+            return sortedTasks.stream().sorted().toList().reversed();
+        }
+    }
+
 }

src/main/java/com/booleanuk/extension/Task.java

@@ -0,0 +1,49 @@
+package com.booleanuk.extension;
+
+import java.time.LocalDateTime;
+
+public class Task {
+    private int id;
+    private String name;
+    private boolean completed;
+    private LocalDateTime creationDate;
+
+    public Task(int id, String name, boolean completed, LocalDateTime creationDate) {
+        this.id = id;
+        this.name = name;
+        this.completed = completed;
+        this.creationDate = creationDate;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public boolean isCompleted() {
+        return completed;
+    }
+
+    public void setCompleted(boolean completionStatus) {
+        this.completed = completionStatus;
+    }
+
+    public LocalDateTime getCreationDate() {
+        return creationDate;
+    }
+
+    public void setCreationDate(LocalDateTime creationDate) {
+        this.creationDate = creationDate;
+    }
+}

src/main/java/com/booleanuk/extension/TodoListExtension.java

@@ -0,0 +1,46 @@
+package com.booleanuk.extension;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+public class TodoListExtension {
+
+    List<Task> tasks;
+
+    public TodoListExtension(List<Task> tasks) {
+        this.tasks = tasks;
+    }
+
+    public String searchTaskById(int taskId) {
+        return tasks.stream()
+                .filter(t -> t.getId() == taskId)
+                .findFirst()
+                .map(Task::getName)
+                .orElse("No task found");
+    }
+
+    public Boolean updateTaskNameById(int taskId, String newName) {
+        return tasks.stream()
+                .filter(t -> t.getId() == taskId)
+                .findFirst()
+                .map(t -> { t.setName(newName); return true;})
+                .orElse(false);
+    }
+
+    public Boolean changeTaskStatusById(int taskId) {
+        return tasks.stream()
+                .filter(t -> t.getId() == taskId)
+                .findFirst()
+                .map(t -> {t.setCompleted(!t.isCompleted()); return true;})
+                .orElse(false);
+    }
+
+    public LocalDateTime getTaskCreationDate(int taskId) {
+        return tasks.stream()
+                .filter(t -> t.getId() == taskId)
+                .findFirst()
+                .map(Task::getCreationDate)
+                .orElse(null);
+    }
+
+}