From 2d8320571de6397271a93f11d0a2f4bde8b92a50 Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Wed, 8 Nov 2023 20:42:08 +0700
Subject: [PATCH 01/10] Initial commit

---
 projects/task_manager/.gitignore |  2 ++
 projects/task_manager/README.MD  |  1 +
 projects/task_manager/app.py     | 12 ++++++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 projects/task_manager/.gitignore
 create mode 100644 projects/task_manager/README.MD
 create mode 100644 projects/task_manager/app.py

diff --git a/projects/task_manager/.gitignore b/projects/task_manager/.gitignore
new file mode 100644
index 0000000..f32e31a
--- /dev/null
+++ b/projects/task_manager/.gitignore
@@ -0,0 +1,2 @@
+.idea/
+.DS_Store
diff --git a/projects/task_manager/README.MD b/projects/task_manager/README.MD
new file mode 100644
index 0000000..2b3ca97
--- /dev/null
+++ b/projects/task_manager/README.MD
@@ -0,0 +1 @@
+# Personal Task Manager
diff --git a/projects/task_manager/app.py b/projects/task_manager/app.py
new file mode 100644
index 0000000..4b059ec
--- /dev/null
+++ b/projects/task_manager/app.py
@@ -0,0 +1,12 @@
+from flask import Flask
+
+app = Flask(__name__)
+
+
+@app.route('/')
+def hello_world():
+    return 'Hello World!'
+
+
+if __name__ == '__main__':
+    app.run()

From 3666475414e3c0d8518b8a33c2b3a0a529079aff Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Wed, 22 Nov 2023 20:12:27 +0700
Subject: [PATCH 02/10] Implement the database manager class

---
 projects/task_manager/.gitignore |  2 +
 projects/task_manager/app.py     |  6 +++
 projects/task_manager/db.py      | 75 ++++++++++++++++++++++++++++++++
 3 files changed, 83 insertions(+)
 create mode 100644 projects/task_manager/db.py

diff --git a/projects/task_manager/.gitignore b/projects/task_manager/.gitignore
index f32e31a..135ebce 100644
--- a/projects/task_manager/.gitignore
+++ b/projects/task_manager/.gitignore
@@ -1,2 +1,4 @@
 .idea/
 .DS_Store
+
+instance/
\ No newline at end of file
diff --git a/projects/task_manager/app.py b/projects/task_manager/app.py
index 4b059ec..e743395 100644
--- a/projects/task_manager/app.py
+++ b/projects/task_manager/app.py
@@ -1,6 +1,12 @@
+import os
 from flask import Flask
 
 app = Flask(__name__)
+app.config.from_mapping(
+    DATABASE=os.path.join(app.instance_path, 'tasks.sqlite')
+)
+
+os.makedirs(app.instance_path, exist_ok=True)
 
 
 @app.route('/')
diff --git a/projects/task_manager/db.py b/projects/task_manager/db.py
new file mode 100644
index 0000000..5a6e325
--- /dev/null
+++ b/projects/task_manager/db.py
@@ -0,0 +1,75 @@
+import sqlite3
+from enum import Enum, auto
+from flask import current_app
+
+
+class TaskPriority(Enum):
+    LOW = auto()
+    MEDIUM = auto()
+    HIGH = auto()
+
+
+class TaskManager:
+    def __init__(self):
+        db_name = current_app.config['DATABASE']
+        self.conn = sqlite3.connect(db_name)
+        self.create_table()
+
+    def __del__(self):
+        self.conn.close()
+
+    def create_table(self):
+        cursor = self.conn.cursor()
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS tasks (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                title TEXT NOT NULL,
+                description TEXT,
+                deadline DATE,
+                priority TEXT CHECK(priority IN ('LOW', 'MEDIUM', 'HIGH'))
+            )
+        ''')
+        self.conn.commit()
+
+    def add_task(self, title, description, deadline, priority):
+        TaskManager.__validate_priority(priority)
+
+        cursor = self.conn.cursor()
+        cursor.execute('''
+            INSERT INTO tasks (title, description, deadline, priority)
+            VALUES (?, ?, ?, ?)
+        ''', (title, description, deadline, priority.name))
+        self.conn.commit()
+
+    def get_tasks(self):
+        cursor = self.conn.cursor()
+        cursor.execute('SELECT * FROM tasks')
+        return cursor.fetchall()
+
+    def update_task(self, task_id, title=None, description=None, deadline=None, priority=None):
+        update_query = 'UPDATE tasks SET '
+        updates = []
+        if title:
+            updates.append(f'title = "{title}"')
+        if description:
+            updates.append(f'description = "{description}"')
+        if deadline:
+            updates.append(f'deadline = "{deadline}"')
+        if priority:
+            TaskManager.__validate_priority(priority)
+            updates.append(f'priority = "{priority.name}"')
+
+        update_query += ', '.join(updates) + f' WHERE id = {task_id}'
+        cursor = self.conn.cursor()
+        cursor.execute(update_query)
+        self.conn.commit()
+
+    def delete_task(self, task_id):
+        cursor = self.conn.cursor()
+        cursor.execute('DELETE FROM tasks WHERE id = ?', (task_id,))
+        self.conn.commit()
+
+    @staticmethod
+    def __validate_priority(priority):
+        if not isinstance(priority, TaskPriority):
+            raise ValueError('Priority must be of type "TaskPriority"')

From ba7b26b7a5dd15775d876654196ba1ee1a314dcd Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 23 Nov 2023 10:29:51 +0700
Subject: [PATCH 03/10] Implement the basic task manager pages

---
 projects/task_manager/app.py                  |  8 +--
 projects/task_manager/db.py                   | 13 ++++-
 projects/task_manager/routes.py               | 52 +++++++++++++++++++
 projects/task_manager/static/list_style.css   | 14 +++++
 .../task_manager/templates/task_form.html     | 37 +++++++++++++
 .../task_manager/templates/task_list.html     | 45 ++++++++++++++++
 6 files changed, 162 insertions(+), 7 deletions(-)
 create mode 100644 projects/task_manager/routes.py
 create mode 100644 projects/task_manager/static/list_style.css
 create mode 100644 projects/task_manager/templates/task_form.html
 create mode 100644 projects/task_manager/templates/task_list.html

diff --git a/projects/task_manager/app.py b/projects/task_manager/app.py
index e743395..85f4c73 100644
--- a/projects/task_manager/app.py
+++ b/projects/task_manager/app.py
@@ -1,18 +1,14 @@
 import os
 from flask import Flask
+from routes import tasks_bp
 
 app = Flask(__name__)
+app.register_blueprint(tasks_bp)
 app.config.from_mapping(
     DATABASE=os.path.join(app.instance_path, 'tasks.sqlite')
 )
 
 os.makedirs(app.instance_path, exist_ok=True)
 
-
-@app.route('/')
-def hello_world():
-    return 'Hello World!'
-
-
 if __name__ == '__main__':
     app.run()
diff --git a/projects/task_manager/db.py b/projects/task_manager/db.py
index 5a6e325..b07b688 100644
--- a/projects/task_manager/db.py
+++ b/projects/task_manager/db.py
@@ -1,6 +1,6 @@
 import sqlite3
 from enum import Enum, auto
-from flask import current_app
+from flask import current_app, g
 
 
 class TaskPriority(Enum):
@@ -46,6 +46,11 @@ def get_tasks(self):
         cursor.execute('SELECT * FROM tasks')
         return cursor.fetchall()
 
+    def get_task_by_id(self, task_id):
+        cursor = self.conn.cursor()
+        cursor.execute('SELECT * FROM tasks WHERE id = ?', (task_id,))
+        return cursor.fetchone()
+
     def update_task(self, task_id, title=None, description=None, deadline=None, priority=None):
         update_query = 'UPDATE tasks SET '
         updates = []
@@ -69,6 +74,12 @@ def delete_task(self, task_id):
         cursor.execute('DELETE FROM tasks WHERE id = ?', (task_id,))
         self.conn.commit()
 
+    @staticmethod
+    def get_instance():
+        if 'task_manager' not in g:
+            g.task_manager = TaskManager()
+        return g.task_manager
+
     @staticmethod
     def __validate_priority(priority):
         if not isinstance(priority, TaskPriority):
diff --git a/projects/task_manager/routes.py b/projects/task_manager/routes.py
new file mode 100644
index 0000000..71bc267
--- /dev/null
+++ b/projects/task_manager/routes.py
@@ -0,0 +1,52 @@
+from db import TaskManager, TaskPriority
+from flask import Blueprint, render_template, request, redirect, url_for
+
+tasks_bp = Blueprint('tasks', __name__, template_folder='templates')
+
+
+@tasks_bp.route('/')
+@tasks_bp.route('/tasks')
+def show_tasks():
+    task_manager = TaskManager.get_instance()
+    tasks = task_manager.get_tasks()
+    return render_template('task_list.html', tasks=tasks)
+
+
+@tasks_bp.route('/add_task', methods=['GET', 'POST'])
+def add_task():
+    if request.method == 'POST':
+        title = request.form['title']
+        description = request.form['description']
+        deadline = request.form['deadline']
+        priority = TaskPriority[request.form['priority']]
+
+        task_manager = TaskManager.get_instance()
+        task_manager.add_task(title, description, deadline, priority)
+        return redirect(url_for('.show_tasks'))
+    return render_template('task_form.html')
+
+
+@tasks_bp.route('/update_task/<int:task_id>', methods=['GET', 'POST'])
+def update_task(task_id):
+    task_manager = TaskManager.get_instance()
+    task = task_manager.get_task_by_id(task_id)
+    if not task:
+        return "Task not found", 404
+
+    if request.method == 'POST':
+        title = request.form['title']
+        description = request.form['description']
+        deadline = request.form['deadline']
+        priority = TaskPriority[request.form['priority']]
+
+        task_manager.update_task(task_id, title, description, deadline, priority)
+        return redirect(url_for('.show_tasks'))
+
+    return render_template('task_form.html', task=task)
+
+
+@tasks_bp.route('/delete_task/<int:task_id>', methods=['POST'])
+def delete_task(task_id):
+    task_manager = TaskManager.get_instance()
+    task_manager.delete_task(task_id)
+    return redirect(url_for('.show_tasks'))
diff --git a/projects/task_manager/static/list_style.css b/projects/task_manager/static/list_style.css
new file mode 100644
index 0000000..fbd5fdd
--- /dev/null
+++ b/projects/task_manager/static/list_style.css
@@ -0,0 +1,14 @@
+table {
+    width: 100%;
+    border-collapse: collapse;
+}
+
+th, td {
+    border: 1px solid #dddddd;
+    padding: 8px;
+    text-align: left;
+}
+
+th {
+    background-color: #f2f2f2;
+}
\ No newline at end of file
diff --git a/projects/task_manager/templates/task_form.html b/projects/task_manager/templates/task_form.html
new file mode 100644
index 0000000..cbd842f
--- /dev/null
+++ b/projects/task_manager/templates/task_form.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Task Form</title>
+</head>
+<body>
+{% if task %}
+    <h1>Update Task</h1>
+    <form action="/update_task/{{ task[0] }}" method="POST">
+{% else %}
+    <h1>Add Task</h1>
+    <form action="/add_task" method="POST">
+{% endif %}
+<label for="title">Title:</label><br>
+<input type="text" id="title" name="title" value="{% if task %}{{ task[1] }}{% endif %}" required><br><br>
+
+<label for="description">Description:</label><br>
+<textarea id="description" name="description" rows="4" cols="50">{% if task %}
+    {{ task[2] }}{% endif %}</textarea><br><br>
+
+<label for="deadline">Deadline:</label><br>
+<input type="date" id="deadline" name="deadline" value="{% if task %}{{ task[3] }}{% endif %}"><br><br>
+
+<label for="priority">Priority:</label><br>
+<select id="priority" name="priority">
+    <option value="LOW" {% if task and task[4] == 'LOW' %} selected {% endif %}>Low</option>
+    <option value="MEDIUM" {% if task and task[4] == 'MEDIUM' %} selected {% endif %}>Medium</option>
+    <option value="HIGH" {% if task and task[4] == 'HIGH' %} selected {% endif %}>High</option>
+</select><br><br>
+
+<input type="submit" value="{% if task %}Update Task{% else %}Add Task{% endif %}">
+</form>
+<br>
+<a href="/tasks">Back to Task List</a>
+</body>
+</html>
diff --git a/projects/task_manager/templates/task_list.html b/projects/task_manager/templates/task_list.html
new file mode 100644
index 0000000..7968cb0
--- /dev/null
+++ b/projects/task_manager/templates/task_list.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Task List</title>
+
+    <link rel="stylesheet" href="{{ url_for('static', filename='list_style.css') }}">
+</head>
+<body>
+<h1>Task List</h1>
+<table>
+    <thead>
+    <tr>
+        <th>ID</th>
+        <th>Title</th>
+        <th>Description</th>
+        <th>Deadline</th>
+        <th>Priority</th>
+        <th>Actions</th>
+    </tr>
+    </thead>
+    <tbody>
+    {% for task in tasks %}
+        <tr>
+            <td>{{ task[0] }}</td>
+            <td>{{ task[1] }}</td>
+            <td>{{ task[2] }}</td>
+            <td>{{ task[3] }}</td>
+            <td>{{ task[4] }}</td>
+            <td>
+                <form action="/update_task/{{ task[0] }}" method="GET">
+                    <button type="submit">Update</button>
+                </form>
+                <form action="/delete_task/{{ task[0] }}" method="POST"
+                      onsubmit="return confirm('Are you sure you want to delete this task?')">
+                    <button type="submit">Delete</button>
+                </form>
+            </td>
+        </tr>
+    {% endfor %}
+    </tbody>
+</table>
+<a href="/add_task">Add Task</a>
+</body>
+</html>

From 89683966737e3781caef5a75eb5b74b1d96fc8e2 Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 30 Nov 2023 11:55:02 +0700
Subject: [PATCH 04/10] Add some styling with Bootstrap

---
 projects/task_manager/static/list_style.css   |  14 +--
 .../task_manager/templates/task_form.html     |  69 +++++++----
 .../task_manager/templates/task_list.html     | 113 +++++++++++++-----
 3 files changed, 129 insertions(+), 67 deletions(-)

diff --git a/projects/task_manager/static/list_style.css b/projects/task_manager/static/list_style.css
index fbd5fdd..db8f1cb 100644
--- a/projects/task_manager/static/list_style.css
+++ b/projects/task_manager/static/list_style.css
@@ -1,14 +1,8 @@
 table {
-    width: 100%;
-    border-collapse: collapse;
+    table-layout: fixed;
 }
 
-th, td {
-    border: 1px solid #dddddd;
-    padding: 8px;
-    text-align: left;
+td {
+    white-space: normal !important;
+    word-wrap: break-word;
 }
-
-th {
-    background-color: #f2f2f2;
-}
\ No newline at end of file
diff --git a/projects/task_manager/templates/task_form.html b/projects/task_manager/templates/task_form.html
index cbd842f..87603ad 100644
--- a/projects/task_manager/templates/task_form.html
+++ b/projects/task_manager/templates/task_form.html
@@ -2,36 +2,57 @@
 <html lang="en">
 <head>
     <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>Task Form</title>
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css"
+          integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
 </head>
 <body>
-{% if task %}
-    <h1>Update Task</h1>
-    <form action="/update_task/{{ task[0] }}" method="POST">
-{% else %}
-    <h1>Add Task</h1>
-    <form action="/add_task" method="POST">
-{% endif %}
-<label for="title">Title:</label><br>
-<input type="text" id="title" name="title" value="{% if task %}{{ task[1] }}{% endif %}" required><br><br>
+<div class="container">
+    {% if task %}
+        <h1 class="my-3">Update Task</h1>
+        <form action="/update_task/{{ task[0] }}" method="POST">
+    {% else %}
+        <h1 class="my-3">Add Task</h1>
+        <form action="/add_task" method="POST">
+    {% endif %}
 
-<label for="description">Description:</label><br>
-<textarea id="description" name="description" rows="4" cols="50">{% if task %}
-    {{ task[2] }}{% endif %}</textarea><br><br>
+    <div class="mb-3">
+        <label for="title" class="form-label">Title</label>
+        <input type="text" class="form-control" id="title" name="title"
+               value="{% if task %}{{ task[1] }}{% endif %}" required>
+    </div>
 
-<label for="deadline">Deadline:</label><br>
-<input type="date" id="deadline" name="deadline" value="{% if task %}{{ task[3] }}{% endif %}"><br><br>
+    <div class="mb-3">
+        <label for="description" class="form-label">Description</label>
+        <textarea class="form-control" id="description" name="description"
+                  rows="4" cols="50">{% if task %}{{ task[2] }}{% endif %}</textarea>
+    </div>
 
-<label for="priority">Priority:</label><br>
-<select id="priority" name="priority">
-    <option value="LOW" {% if task and task[4] == 'LOW' %} selected {% endif %}>Low</option>
-    <option value="MEDIUM" {% if task and task[4] == 'MEDIUM' %} selected {% endif %}>Medium</option>
-    <option value="HIGH" {% if task and task[4] == 'HIGH' %} selected {% endif %}>High</option>
-</select><br><br>
+    <div class="mb-3">
+        <label for="deadline" class="form-label">Deadline</label>
+        <input type="date" class="form-control" id="deadline" name="deadline"
+               value="{% if task %}{{ task[3] }}{% endif %}">
+    </div>
 
-<input type="submit" value="{% if task %}Update Task{% else %}Add Task{% endif %}">
-</form>
-<br>
-<a href="/tasks">Back to Task List</a>
+    <div class="mb-3">
+        <label for="priority" class="form-label">Priority</label>
+        <select class="form-select" id="priority" name="priority">
+            <option value="LOW" {% if task and task[4] == 'LOW' %} selected {% endif %}>Low</option>
+            <option value="MEDIUM" {% if task and task[4] == 'MEDIUM' %} selected {% endif %}>Medium</option>
+            <option value="HIGH" {% if task and task[4] == 'HIGH' %} selected {% endif %}>High</option>
+        </select>
+    </div>
+
+    <div class="d-grid gap-2 d-md-block">
+        <input type="submit" class="btn btn-primary" value="{% if task %}Update Task{% else %}Add Task{% endif %}">
+        <a href="/tasks" class="btn btn-secondary">Back to Task List</a>
+    </div>
+    </form>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"
+        integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL"
+        crossorigin="anonymous"></script>
 </body>
 </html>
diff --git a/projects/task_manager/templates/task_list.html b/projects/task_manager/templates/task_list.html
index 7968cb0..a2200e4 100644
--- a/projects/task_manager/templates/task_list.html
+++ b/projects/task_manager/templates/task_list.html
@@ -2,44 +2,91 @@
 <html lang="en">
 <head>
     <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>Task List</title>
-
     <link rel="stylesheet" href="{{ url_for('static', filename='list_style.css') }}">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css"
+          integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
 </head>
 <body>
-<h1>Task List</h1>
-<table>
-    <thead>
-    <tr>
-        <th>ID</th>
-        <th>Title</th>
-        <th>Description</th>
-        <th>Deadline</th>
-        <th>Priority</th>
-        <th>Actions</th>
-    </tr>
-    </thead>
-    <tbody>
-    {% for task in tasks %}
+<div class="container">
+    <h1 class="my-3">Task List</h1>
+
+    <form action="/tasks" method="GET" id="sorting-form" class="row g-3 my-3">
+        <label for="sort_by" class="col-auto col-form-label">Sort By</label>
+        <div class="col">
+            <select id="sort_by" name="sort_by" class="form-select">
+                <option value="id" {% if request.args.get('sort_by') == 'id' %}selected{% endif %}>
+                    ID
+                </option>
+                <option value="title" {% if request.args.get('sort_by') == 'title' %}selected{% endif %}>
+                    Title
+                </option>
+                <option value="deadline" {% if request.args.get('sort_by') == 'deadline' %}selected{% endif %}>
+                    Deadline
+                </option>
+                <option value="priority" {% if request.args.get('sort_by') == 'priority' %}selected{% endif %}>
+                    Priority
+                </option>
+            </select>
+        </div>
+
+        <div class="col-auto">
+            <div class="btn-group" role="group">
+                <input type="radio" class="btn-check"
+                       name="order" value="ASC"
+                       id="asc-radio" autocomplete="off"
+                       {% if request.args.get('order') != 'DESC' %}checked{% endif %}>
+                <label class="btn btn-outline-primary" for="asc-radio">Ascending</label>
+
+                <input type="radio" class="btn-check"
+                       name="order" value="DESC"
+                       id="desc-radio" autocomplete="off"
+                       {% if request.args.get('order') == 'DESC' %}checked{% endif %}>
+                <label class="btn btn-outline-primary" for="desc-radio">Descending</label>
+            </div>
+        </div>
+    </form>
+
+    <table class="table table-striped table-hover">
+        <thead>
         <tr>
-            <td>{{ task[0] }}</td>
-            <td>{{ task[1] }}</td>
-            <td>{{ task[2] }}</td>
-            <td>{{ task[3] }}</td>
-            <td>{{ task[4] }}</td>
-            <td>
-                <form action="/update_task/{{ task[0] }}" method="GET">
-                    <button type="submit">Update</button>
-                </form>
-                <form action="/delete_task/{{ task[0] }}" method="POST"
-                      onsubmit="return confirm('Are you sure you want to delete this task?')">
-                    <button type="submit">Delete</button>
-                </form>
-            </td>
+            <th scope="col" class="col-1">ID</th>
+            <th scope="col" class="col-3">Title</th>
+            <th scope="col" class="col-3">Description</th>
+            <th scope="col" class="col-2">Deadline</th>
+            <th scope="col" class="col-1">Priority</th>
+            <th scope="col" class="col-2">Actions</th>
         </tr>
-    {% endfor %}
-    </tbody>
-</table>
-<a href="/add_task">Add Task</a>
+        </thead>
+        <tbody>
+        {% for task in tasks %}
+            <tr>
+                <td>{{ task[0] }}</td>
+                <td>{{ task[1] }}</td>
+                <td>{{ task[2] }}</td>
+                <td>{{ task[3] }}</td>
+                <td>{{ task[4] }}</td>
+                <td>
+                    <div class="btn-group" role="group">
+                        <form action="/update_task/{{ task[0] }}" method="GET">
+                            <button type="submit" class="btn btn-outline-primary btn-sm me-1">Update</button>
+                        </form>
+                        <form action="/delete_task/{{ task[0] }}" method="POST"
+                              onsubmit="return confirm('Are you sure you want to delete this task?')">
+                            <button type="submit" class="btn btn-outline-danger btn-sm ms-1">Delete</button>
+                        </form>
+                    </div>
+                </td>
+            </tr>
+        {% endfor %}
+        </tbody>
+    </table>
+    <a href="/add_task" class="btn btn-primary my-3">Add Task</a>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"
+        integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL"
+        crossorigin="anonymous"></script>
 </body>
 </html>

From 4b33f85303357a8bcd3bbeb47f8b7f1a5b48f98a Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 30 Nov 2023 11:03:56 +0700
Subject: [PATCH 05/10] Implement table sorting

---
 projects/task_manager/db.py                    |  9 +++++++--
 projects/task_manager/routes.py                |  5 ++++-
 projects/task_manager/templates/task_list.html | 12 ++++++++++++
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/projects/task_manager/db.py b/projects/task_manager/db.py
index b07b688..e43bb19 100644
--- a/projects/task_manager/db.py
+++ b/projects/task_manager/db.py
@@ -41,9 +41,14 @@ def add_task(self, title, description, deadline, priority):
         ''', (title, description, deadline, priority.name))
         self.conn.commit()
 
-    def get_tasks(self):
+    def get_tasks(self, sort_by, order):
+        if sort_by not in ('id', 'title', 'deadline', 'priority'):
+            sort_by = 'id'
+        if order not in ('ASC', 'DESC'):
+            order = 'ASC'
+
         cursor = self.conn.cursor()
-        cursor.execute('SELECT * FROM tasks')
+        cursor.execute(f'SELECT * FROM tasks ORDER BY {sort_by} {order}')
         return cursor.fetchall()
 
     def get_task_by_id(self, task_id):
diff --git a/projects/task_manager/routes.py b/projects/task_manager/routes.py
index 71bc267..9c064c2 100644
--- a/projects/task_manager/routes.py
+++ b/projects/task_manager/routes.py
@@ -7,8 +7,11 @@
 @tasks_bp.route('/')
 @tasks_bp.route('/tasks')
 def show_tasks():
+    sort_by = request.args.get('sort_by', 'id')
+    order = request.args.get('order', 'ASC')
+
     task_manager = TaskManager.get_instance()
-    tasks = task_manager.get_tasks()
+    tasks = task_manager.get_tasks(sort_by, order)
     return render_template('task_list.html', tasks=tasks)
 
 
diff --git a/projects/task_manager/templates/task_list.html b/projects/task_manager/templates/task_list.html
index a2200e4..7ede003 100644
--- a/projects/task_manager/templates/task_list.html
+++ b/projects/task_manager/templates/task_list.html
@@ -85,6 +85,18 @@ <h1 class="my-3">Task List</h1>
     <a href="/add_task" class="btn btn-primary my-3">Add Task</a>
 </div>
 
+<script>
+    document.addEventListener('DOMContentLoaded', function () {
+        const form = document.getElementById('sorting-form');
+        form.addEventListener('change', event => {
+            const target = event.target;
+            if (target.tagName === 'SELECT' || (target.type === 'radio' && target.checked)) {
+                event.preventDefault();
+                form.submit();
+            }
+        });
+    });
+</script>
 <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"
         integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL"
         crossorigin="anonymous"></script>

From d5de009f520454d4adcd10a2fc49354a453f6e69 Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 30 Nov 2023 11:32:54 +0700
Subject: [PATCH 06/10] Eliminate SQL injections in update_task request

---
 projects/task_manager/db.py | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/projects/task_manager/db.py b/projects/task_manager/db.py
index e43bb19..98ccb74 100644
--- a/projects/task_manager/db.py
+++ b/projects/task_manager/db.py
@@ -59,19 +59,27 @@ def get_task_by_id(self, task_id):
     def update_task(self, task_id, title=None, description=None, deadline=None, priority=None):
         update_query = 'UPDATE tasks SET '
         updates = []
+        values = []
+
         if title:
-            updates.append(f'title = "{title}"')
+            updates.append('title = ?')
+            values.append(title)
         if description:
-            updates.append(f'description = "{description}"')
+            updates.append('description = ?')
+            values.append(description)
         if deadline:
-            updates.append(f'deadline = "{deadline}"')
+            updates.append('deadline = ?')
+            values.append(deadline)
         if priority:
             TaskManager.__validate_priority(priority)
-            updates.append(f'priority = "{priority.name}"')
+            updates.append('priority = ?')
+            values.append(priority.name)
+
+        update_query += ', '.join(updates) + ' WHERE id = ?'
+        values.append(task_id)
 
-        update_query += ', '.join(updates) + f' WHERE id = {task_id}'
         cursor = self.conn.cursor()
-        cursor.execute(update_query)
+        cursor.execute(update_query, values)
         self.conn.commit()
 
     def delete_task(self, task_id):

From 3ba9f74c7c65c4c8d4f802b565cbf49366f6e060 Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 30 Nov 2023 18:06:28 +0700
Subject: [PATCH 07/10] Add support for projects and implement filtering

---
 projects/task_manager/db.py                   | 34 ++++++--
 projects/task_manager/routes.py               | 13 +++-
 .../task_manager/templates/task_form.html     |  6 ++
 .../task_manager/templates/task_list.html     | 78 +++++++++++--------
 4 files changed, 88 insertions(+), 43 deletions(-)

diff --git a/projects/task_manager/db.py b/projects/task_manager/db.py
index 98ccb74..0694ac6 100644
--- a/projects/task_manager/db.py
+++ b/projects/task_manager/db.py
@@ -26,29 +26,39 @@ def create_table(self):
                 title TEXT NOT NULL,
                 description TEXT,
                 deadline DATE,
-                priority TEXT CHECK(priority IN ('LOW', 'MEDIUM', 'HIGH'))
+                priority TEXT CHECK(priority IN ('LOW', 'MEDIUM', 'HIGH')),
+                project TEXT
             )
         ''')
         self.conn.commit()
 
-    def add_task(self, title, description, deadline, priority):
+    def add_task(self, title, description, deadline, priority, project):
         TaskManager.__validate_priority(priority)
 
         cursor = self.conn.cursor()
         cursor.execute('''
-            INSERT INTO tasks (title, description, deadline, priority)
-            VALUES (?, ?, ?, ?)
-        ''', (title, description, deadline, priority.name))
+            INSERT INTO tasks (title, description, deadline, priority, project)
+            VALUES (?, ?, ?, ?, ?)
+        ''', (title, description, deadline, priority.name, project))
         self.conn.commit()
 
-    def get_tasks(self, sort_by, order):
+    def get_tasks(self, sort_by, order, project):
         if sort_by not in ('id', 'title', 'deadline', 'priority'):
             sort_by = 'id'
         if order not in ('ASC', 'DESC'):
             order = 'ASC'
 
+        query = ['SELECT * FROM tasks']
+        values = []
+
+        if project:
+            query.append('WHERE project = ?')
+            values.append(project)
+
+        query.append(f'ORDER BY {sort_by} {order}')
+
         cursor = self.conn.cursor()
-        cursor.execute(f'SELECT * FROM tasks ORDER BY {sort_by} {order}')
+        cursor.execute(' '.join(query), values)
         return cursor.fetchall()
 
     def get_task_by_id(self, task_id):
@@ -56,7 +66,7 @@ def get_task_by_id(self, task_id):
         cursor.execute('SELECT * FROM tasks WHERE id = ?', (task_id,))
         return cursor.fetchone()
 
-    def update_task(self, task_id, title=None, description=None, deadline=None, priority=None):
+    def update_task(self, task_id, title=None, description=None, deadline=None, priority=None, project=None):
         update_query = 'UPDATE tasks SET '
         updates = []
         values = []
@@ -74,6 +84,9 @@ def update_task(self, task_id, title=None, description=None, deadline=None, prio
             TaskManager.__validate_priority(priority)
             updates.append('priority = ?')
             values.append(priority.name)
+        if project:
+            updates.append('project = ?')
+            values.append(project)
 
         update_query += ', '.join(updates) + ' WHERE id = ?'
         values.append(task_id)
@@ -87,6 +100,11 @@ def delete_task(self, task_id):
         cursor.execute('DELETE FROM tasks WHERE id = ?', (task_id,))
         self.conn.commit()
 
+    def get_projects(self):
+        cursor = self.conn.cursor()
+        cursor.execute('SELECT DISTINCT project FROM tasks ORDER BY project ASC')
+        return [project[0] for project in cursor.fetchall()]
+
     @staticmethod
     def get_instance():
         if 'task_manager' not in g:
diff --git a/projects/task_manager/routes.py b/projects/task_manager/routes.py
index 9c064c2..9cffb7e 100644
--- a/projects/task_manager/routes.py
+++ b/projects/task_manager/routes.py
@@ -9,10 +9,13 @@
 def show_tasks():
     sort_by = request.args.get('sort_by', 'id')
     order = request.args.get('order', 'ASC')
+    project = request.args.get('project')
 
     task_manager = TaskManager.get_instance()
-    tasks = task_manager.get_tasks(sort_by, order)
-    return render_template('task_list.html', tasks=tasks)
+    tasks = task_manager.get_tasks(sort_by, order, project)
+    projects = task_manager.get_projects()
+
+    return render_template('task_list.html', tasks=tasks, projects=projects)
 
 
 @tasks_bp.route('/add_task', methods=['GET', 'POST'])
@@ -22,9 +25,10 @@ def add_task():
         description = request.form['description']
         deadline = request.form['deadline']
         priority = TaskPriority[request.form['priority']]
+        project = request.form['project']
 
         task_manager = TaskManager.get_instance()
-        task_manager.add_task(title, description, deadline, priority)
+        task_manager.add_task(title, description, deadline, priority, project)
         return redirect(url_for('.show_tasks'))
     return render_template('task_form.html')
 
@@ -41,8 +45,9 @@ def update_task(task_id):
         description = request.form['description']
         deadline = request.form['deadline']
         priority = TaskPriority[request.form['priority']]
+        project = request.form['project']
 
-        task_manager.update_task(task_id, title, description, deadline, priority)
+        task_manager.update_task(task_id, title, description, deadline, priority, project)
         return redirect(url_for('.show_tasks'))
 
     return render_template('task_form.html', task=task)
diff --git a/projects/task_manager/templates/task_form.html b/projects/task_manager/templates/task_form.html
index 87603ad..c6a1982 100644
--- a/projects/task_manager/templates/task_form.html
+++ b/projects/task_manager/templates/task_form.html
@@ -44,6 +44,12 @@ <h1 class="my-3">Add Task</h1>
         </select>
     </div>
 
+    <div class="mb-3">
+        <label for="project" class="form-label">Project</label>
+        <input type="text" class="form-control" id="project" name="project"
+               value="{% if task %}{{ task[5] }}{% endif %}">
+    </div>
+
     <div class="d-grid gap-2 d-md-block">
         <input type="submit" class="btn btn-primary" value="{% if task %}Update Task{% else %}Add Task{% endif %}">
         <a href="/tasks" class="btn btn-secondary">Back to Task List</a>
diff --git a/projects/task_manager/templates/task_list.html b/projects/task_manager/templates/task_list.html
index 7ede003..91c3413 100644
--- a/projects/task_manager/templates/task_list.html
+++ b/projects/task_manager/templates/task_list.html
@@ -12,38 +12,54 @@
 <div class="container">
     <h1 class="my-3">Task List</h1>
 
-    <form action="/tasks" method="GET" id="sorting-form" class="row g-3 my-3">
-        <label for="sort_by" class="col-auto col-form-label">Sort By</label>
-        <div class="col">
-            <select id="sort_by" name="sort_by" class="form-select">
-                <option value="id" {% if request.args.get('sort_by') == 'id' %}selected{% endif %}>
-                    ID
-                </option>
-                <option value="title" {% if request.args.get('sort_by') == 'title' %}selected{% endif %}>
-                    Title
-                </option>
-                <option value="deadline" {% if request.args.get('sort_by') == 'deadline' %}selected{% endif %}>
-                    Deadline
-                </option>
-                <option value="priority" {% if request.args.get('sort_by') == 'priority' %}selected{% endif %}>
-                    Priority
-                </option>
-            </select>
-        </div>
+    <form action="/tasks" method="GET" id="sorting-form">
+        <div class="row g-3 my-3">
+            <label for="sort_by" class="col-auto col-form-label">Sort By</label>
+            <div class="col">
+                <select id="sort_by" name="sort_by" class="form-select">
+                    <option value="id" {% if request.args.get('sort_by') == 'id' %}selected{% endif %}>
+                        ID
+                    </option>
+                    <option value="title" {% if request.args.get('sort_by') == 'title' %}selected{% endif %}>
+                        Title
+                    </option>
+                    <option value="deadline" {% if request.args.get('sort_by') == 'deadline' %}selected{% endif %}>
+                        Deadline
+                    </option>
+                    <option value="priority" {% if request.args.get('sort_by') == 'priority' %}selected{% endif %}>
+                        Priority
+                    </option>
+                </select>
+            </div>
+
+            <div class="col-auto">
+                <div class="btn-group" role="group">
+                    <input type="radio" class="btn-check"
+                           name="order" value="ASC"
+                           id="asc-radio" autocomplete="off"
+                           {% if request.args.get('order') != 'DESC' %}checked{% endif %}>
+                    <label class="btn btn-outline-primary" for="asc-radio">Ascending</label>
 
-        <div class="col-auto">
-            <div class="btn-group" role="group">
-                <input type="radio" class="btn-check"
-                       name="order" value="ASC"
-                       id="asc-radio" autocomplete="off"
-                       {% if request.args.get('order') != 'DESC' %}checked{% endif %}>
-                <label class="btn btn-outline-primary" for="asc-radio">Ascending</label>
+                    <input type="radio" class="btn-check"
+                           name="order" value="DESC"
+                           id="desc-radio" autocomplete="off"
+                           {% if request.args.get('order') == 'DESC' %}checked{% endif %}>
+                    <label class="btn btn-outline-primary" for="desc-radio">Descending</label>
+                </div>
+            </div>
+        </div>
 
-                <input type="radio" class="btn-check"
-                       name="order" value="DESC"
-                       id="desc-radio" autocomplete="off"
-                       {% if request.args.get('order') == 'DESC' %}checked{% endif %}>
-                <label class="btn btn-outline-primary" for="desc-radio">Descending</label>
+        <div class="row g-3 mb-3">
+            <label for="project" class="col-auto col-form-label">Project</label>
+            <div class="col">
+                <select id="project" name="project" class="form-select">
+                    {% for project in projects %}
+                        <option value="{{ project }}"
+                                {% if request.args.get('project') == project %}selected{% endif %}>
+                            {{ project if project else 'Any' }}
+                        </option>
+                    {% endfor %}
+                </select>
             </div>
         </div>
     </form>
@@ -66,7 +82,7 @@ <h1 class="my-3">Task List</h1>
                 <td>{{ task[1] }}</td>
                 <td>{{ task[2] }}</td>
                 <td>{{ task[3] }}</td>
-                <td>{{ task[4] }}</td>
+                <td>{{ task[4].capitalize() }}</td>
                 <td>
                     <div class="btn-group" role="group">
                         <form action="/update_task/{{ task[0] }}" method="GET">

From 638b9017e0e88d1d8a3be87e2ad1be29e6674acf Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 30 Nov 2023 18:34:58 +0700
Subject: [PATCH 08/10] Implement error handling

---
 projects/task_manager/app.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/projects/task_manager/app.py b/projects/task_manager/app.py
index 85f4c73..0f9be8f 100644
--- a/projects/task_manager/app.py
+++ b/projects/task_manager/app.py
@@ -1,4 +1,6 @@
 import os
+import sys
+import sqlite3
 from flask import Flask
 from routes import tasks_bp
 
@@ -8,7 +10,16 @@
     DATABASE=os.path.join(app.instance_path, 'tasks.sqlite')
 )
 
-os.makedirs(app.instance_path, exist_ok=True)
+
+@app.errorhandler(sqlite3.Error)
+def handle_error(err):
+    return f'Database operation failed: {err}', 500
+
+
+try:
+    os.makedirs(app.instance_path, exist_ok=True)
+except OSError as e:
+    sys.exit(f'Failed to create the instance directory at {e.filename}')
 
 if __name__ == '__main__':
     app.run()

From b139abfe3a52494344a06a8ff4f11a71b47a4846 Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Thu, 30 Nov 2023 18:58:52 +0700
Subject: [PATCH 09/10] Update README.md

---
 projects/task_manager/.gitignore       |  2 ++
 projects/task_manager/README.MD        | 22 ++++++++++++++++++++++
 projects/task_manager/requirements.txt |  1 +
 3 files changed, 25 insertions(+)
 create mode 100644 projects/task_manager/requirements.txt

diff --git a/projects/task_manager/.gitignore b/projects/task_manager/.gitignore
index 135ebce..85d6e9e 100644
--- a/projects/task_manager/.gitignore
+++ b/projects/task_manager/.gitignore
@@ -1,4 +1,6 @@
 .idea/
+.venv/
+__pycache__/
 .DS_Store
 
 instance/
\ No newline at end of file
diff --git a/projects/task_manager/README.MD b/projects/task_manager/README.MD
index 2b3ca97..e36ff0d 100644
--- a/projects/task_manager/README.MD
+++ b/projects/task_manager/README.MD
@@ -1 +1,23 @@
 # Personal Task Manager
+
+В данном проекте реализован проект менеджера задач согласно [описанию](./task_description.md). В качестве базы данных
+используется встроенный в стандартную библиотеку модуль `sqlite3`, а для пользовательского интерфейса реализовано
+веб-приложение на [Flask](https://github.com/pallets/flask).
+
+## Запуск
+
+Для первого запуска приложения рекомендуется создать виртуальное окружение и установить зависимости:
+
+```shell
+python3 -m venv .venv
+source .venv/bin/activate
+python3 -m pip install -r requirements.txt
+```
+
+Далее для запуска веб-приложение необходимо вызвать:
+
+```shell
+python3 -m flask run
+```
+
+Актуальный адрес для подключения к приложению будет выведен в стандартный вывод. По умолчанию это http://127.0.0.1:5000. 
\ No newline at end of file
diff --git a/projects/task_manager/requirements.txt b/projects/task_manager/requirements.txt
new file mode 100644
index 0000000..047e950
--- /dev/null
+++ b/projects/task_manager/requirements.txt
@@ -0,0 +1 @@
+Flask==3.0.0

From a384ccaf18764944be2599db9c66fe75dad78645 Mon Sep 17 00:00:00 2001
From: Konstantin Moskalenko <kkmoskalenko@icloud.com>
Date: Fri, 1 Dec 2023 00:44:31 +0700
Subject: [PATCH 10/10] Implement importing and exporting tasks

---
 projects/task_manager/managers/__init__.py    |  0
 projects/task_manager/managers/csv_manager.py | 36 ++++++++++++
 .../{db.py => managers/task_manager.py}       |  2 +-
 projects/task_manager/routes.py               | 55 ++++++++++++++++++-
 .../task_manager/templates/task_list.html     | 31 ++++++++++-
 5 files changed, 120 insertions(+), 4 deletions(-)
 create mode 100644 projects/task_manager/managers/__init__.py
 create mode 100644 projects/task_manager/managers/csv_manager.py
 rename projects/task_manager/{db.py => managers/task_manager.py} (97%)

diff --git a/projects/task_manager/managers/__init__.py b/projects/task_manager/managers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/projects/task_manager/managers/csv_manager.py b/projects/task_manager/managers/csv_manager.py
new file mode 100644
index 0000000..f2db131
--- /dev/null
+++ b/projects/task_manager/managers/csv_manager.py
@@ -0,0 +1,36 @@
+import csv
+from .task_manager import TaskManager, TaskPriority
+
+
+class CSVManager:
+    def __init__(self):
+        self.task_manager = TaskManager.get_instance()
+
+    def import_tasks(self, file_path):
+        with open(file_path, 'r') as file:
+            reader = csv.DictReader(file)
+            for row in reader:
+                title = row['Title']
+                description = row['Description']
+                deadline = row['Deadline']
+                priority = TaskPriority[row['Priority']]
+                project = row['Project']
+
+                self.task_manager.add_task(title, description, deadline, priority, project)
+
+    def export_tasks(self, file_path):
+        tasks = self.task_manager.get_tasks(sort_by=None, order=None, project=None)
+
+        with open(file_path, 'w') as file:
+            fieldnames = ['Title', 'Description', 'Deadline', 'Priority', 'Project']
+            writer = csv.DictWriter(file, fieldnames=fieldnames)
+            writer.writeheader()
+
+            for task in tasks:
+                writer.writerow({
+                    'Title': task[1],
+                    'Description': task[2],
+                    'Deadline': task[3],
+                    'Priority': task[4],
+                    'Project': task[5]
+                })
diff --git a/projects/task_manager/db.py b/projects/task_manager/managers/task_manager.py
similarity index 97%
rename from projects/task_manager/db.py
rename to projects/task_manager/managers/task_manager.py
index 0694ac6..928ffef 100644
--- a/projects/task_manager/db.py
+++ b/projects/task_manager/managers/task_manager.py
@@ -43,7 +43,7 @@ def add_task(self, title, description, deadline, priority, project):
         self.conn.commit()
 
     def get_tasks(self, sort_by, order, project):
-        if sort_by not in ('id', 'title', 'deadline', 'priority'):
+        if sort_by not in ('id', 'title', 'description', 'deadline', 'priority'):
             sort_by = 'id'
         if order not in ('ASC', 'DESC'):
             order = 'ASC'
diff --git a/projects/task_manager/routes.py b/projects/task_manager/routes.py
index 9cffb7e..2b5a335 100644
--- a/projects/task_manager/routes.py
+++ b/projects/task_manager/routes.py
@@ -1,5 +1,10 @@
-from db import TaskManager, TaskPriority
-from flask import Blueprint, render_template, request, redirect, url_for
+import os
+import sys
+from tempfile import gettempdir
+
+from managers.csv_manager import CSVManager
+from managers.task_manager import TaskManager, TaskPriority
+from flask import Blueprint, render_template, request, redirect, url_for, send_file, after_this_request
 
 tasks_bp = Blueprint('tasks', __name__, template_folder='templates')
 
@@ -58,3 +63,49 @@ def delete_task(task_id):
     task_manager = TaskManager.get_instance()
     task_manager.delete_task(task_id)
     return redirect(url_for('.show_tasks'))
+
+
+@tasks_bp.route('/upload_csv', methods=['POST'])
+def upload_csv():
+    if 'csv_file' not in request.files:
+        return 'No file part', 400
+
+    csv_file = request.files['csv_file']
+
+    if csv_file.filename == '':
+        return 'No file selected', 400
+
+    if csv_file and csv_file.filename.endswith('.csv'):
+        try:
+            file_path = os.path.join(gettempdir(), csv_file.filename)
+            csv_file.save(file_path)
+
+            csv_manager = CSVManager()
+            csv_manager.import_tasks(file_path)
+            os.remove(file_path)
+        except Exception:
+            return 'Failed to import the CSV file, try uploading another one', 400
+
+        return redirect(url_for('.show_tasks'))
+
+    return 'Invalid file format, please upload a CSV file', 400
+
+
+@tasks_bp.route('/download_csv')
+def download_csv():
+    try:
+        csv_manager = CSVManager()
+        file_path = os.path.join(gettempdir(), 'tasks_export.csv')
+        csv_manager.export_tasks(file_path)
+    except Exception:
+        return 'Failed to export tasks to a CSV file', 400
+
+    @after_this_request
+    def remove_file(response):
+        try:
+            os.remove(file_path)
+        except OSError as err:
+            print(f'Failed to remove the exported CSV file: {err}', file=sys.stderr)
+        return response
+
+    return send_file(file_path, as_attachment=True, mimetype='text/csv')
diff --git a/projects/task_manager/templates/task_list.html b/projects/task_manager/templates/task_list.html
index 91c3413..ae827cf 100644
--- a/projects/task_manager/templates/task_list.html
+++ b/projects/task_manager/templates/task_list.html
@@ -23,6 +23,9 @@ <h1 class="my-3">Task List</h1>
                     <option value="title" {% if request.args.get('sort_by') == 'title' %}selected{% endif %}>
                         Title
                     </option>
+                    <option value="description" {% if request.args.get('sort_by') == 'description' %}selected{% endif %}>
+                        Description
+                    </option>
                     <option value="deadline" {% if request.args.get('sort_by') == 'deadline' %}selected{% endif %}>
                         Deadline
                     </option>
@@ -98,7 +101,27 @@ <h1 class="my-3">Task List</h1>
         {% endfor %}
         </tbody>
     </table>
-    <a href="/add_task" class="btn btn-primary my-3">Add Task</a>
+
+    <div class="mb-5 row">
+        <div class="col-auto">
+            <a href="/add_task" class="btn btn-primary">Add Task</a>
+        </div>
+        <div class="col-auto">
+            <a href="/download_csv" class="btn btn-secondary">Export Tasks</a>
+        </div>
+    </div>
+
+    <form action="/upload_csv" method="POST" enctype="multipart/form-data">
+        <div class="mb-3 row">
+            <label for="csv_file" class="form-label">Import Tasks from CSV</label>
+            <div class="col-auto">
+                <input type="file" class="form-control" id="csv_file" name="csv_file" accept="text/csv">
+            </div>
+            <div class="col-auto">
+                <button type="submit" class="btn btn-secondary" id="csv_submit" disabled>Import Tasks</button>
+            </div>
+        </div>
+    </form>
 </div>
 
 <script>
@@ -111,6 +134,12 @@ <h1 class="my-3">Task List</h1>
                 form.submit();
             }
         });
+
+        const fileInput = document.getElementById('csv_file');
+        const submitBtn = document.getElementById('csv_submit');
+        fileInput.addEventListener('change', () => {
+            submitBtn.disabled = fileInput.files.length === 0;
+        });
     });
 </script>
 <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"