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AmI-2016 · Apr 10, 2016 · 9a1f2ac · 9a1f2ac
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diff --git a/db_interaction.py b/db_interaction.py
@@ -0,0 +1,108 @@
+'''
+Created on Apr 04, 2016
+Copyright (c) 2015-2016 Teodoro Montanaro
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License
+@author: tmontanaro
+'''
+
+import sqlite3
+
+
+def db_insert_task(text, urgent):
+    '''
+    :param text: text that we want to insert as task in the db
+    :param urgent: 0 if the task is not urgent, 1 otherwise
+
+    This method insert a task in the database
+    '''
+
+    # prepare the query text
+    sql = """INSERT INTO task(todo, urgent) VALUES (?, ?)"""
+
+    #connect to the db
+    conn = sqlite3.connect("task_list.db")
+    cursor = conn.cursor()
+
+    try:
+        #execute the query passing the needed parameters
+        cursor.execute(sql, (text, urgent) )
+        #commit all pending queries
+        conn.commit()
+    except Exception,e:
+        print str(e)
+        # if something goes wrong: rollback
+        conn.rollback()
+
+    #close the connection
+    conn.close()
+
+
+def get_sorted_tasks_list():
+    '''
+    :param tasks_list: list of existing tasks
+
+    Get existing tasks from the database
+    '''
+
+    tasks_list = []
+    sql = "SELECT todo FROM task order by todo ASC" #here we order data using "order by"
+    conn = sqlite3.connect("task_list.db")
+
+    # to remove u from sqlite3 cursor.fetchall() results
+    conn.text_factory = sqlite3.OptimizedUnicode
+
+
+    cursor = conn.cursor()
+    cursor.execute(sql)
+
+    results = cursor.fetchall()
+
+    # print results
+
+    for task in results:
+        tasks_list.append(task[0]) #each "task" is a tuple, so we have to take the first element of it
+
+    conn.close()
+
+    return tasks_list
+
+def db_remove_task(text):
+    '''
+    :param text: text (or part of it) of the task we want to remove from the db
+
+    This method remove from the db all the tasks that contain the specified string
+    '''
+
+    # prepare the query text
+    sql = "delete from task where todo LIKE ?"
+
+    # add percent sign (%) wildcard to select all the strings that contain specified text
+    # <<the multiple character percent sign (%) wildcardcan be used to represent any number of characters in a value match>>
+    text = "%"+text + "%"
+
+    #connect to the db
+    conn = sqlite3.connect("task_list.db")
+    cursor = conn.cursor()
+
+    try:
+        #execute the query passing the needed parameters
+        cursor.execute(sql, (text, ) )
+        #commit all pending executed queries in the connection
+        conn.commit()
+    except Exception,e:
+        print str(e)
+        # if something goes wrong: rollback
+        conn.rollback()
+
+    #close the connection
+    conn.close()
diff --git a/db_interaction.pyc b/db_interaction.pyc
diff --git a/static/rooster.jpg b/static/rooster.jpg
diff --git a/task_list.db b/task_list.db
diff --git a/templates/delete_task.html b/templates/delete_task.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Delete tasks</title>
+</head>
+<body>
+    <p>Here you can delete all the existing tasks that contain a provided string</p>
+    <p>Existing tasks: </p>
+    <ul>
+        {% for task in tasks_list %}
+            <li>{{ task }}</li>
+        {% endfor %}
+    </ul>
+
+    {% if substring_for_delete!="" %}
+        <p><b style="color:green;">Removal successfully performed!</b></p>
+
+    {% else %}
+        <form action="{{ url_for('delete_task') }}" method="post">
+            <p>
+                <label>Type the substring you want to use to remove all tasks that contain it:  <input type="text" name="substring_for_delete"></label>
+                <input type="submit" value="Enter">
+            </p>
+        </form>
+    {% endif %}
+
+<p><a href="{{ url_for('index') }}">Come back home</a></p>
+</body>
+</html>
diff --git a/templates/index.html b/templates/index.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Welcome to the Todo List Manager</title>
+</head>
+<body>
+<h1>Welcome to the Todo List Manager</h1>
+<p>Select the action you want to perform from the following menu:</p>
+<ul>
+    <li>
+        <a href="{{ url_for('insert_task') }}">insert a new task</a>
+    </li>
+    <li>
+        <a href="{{ url_for('show_tasks') }}">show all existing tasks sorted in alphabetic order</a>
+    </li>
+    <li>
+        <a href="{{ url_for('delete_task') }}">remove all the existing tasks that contain a provided string</a>
+    </li>
+</ul>
+
+</body>
+</html>
diff --git a/templates/insert_task.html b/templates/insert_task.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Login page</title>
+</head>
+<body>
+    <p>Here you can insert a new task</p>
+
+    {% if string_for_insertion!="" %}
+        <p><b style="color:green;">Insertion successfully performed!</b></p>
+
+    {% else %}
+        <form action="{{ url_for('insert_task') }}" method="post">
+            <p>
+                <label>Type the new task:  <input type="text" name="string_for_insertion"></label>
+                <label>Is it urgent?  <input type="checkbox" name="urgent_for_insertion"></label>
+                <input type="submit" value="Enter">
+            </p>
+        </form>
+    {% endif %}
+
+
+<p><a href="{{ url_for('index') }}">Come back home</a></p>
+</body>
+</html>
diff --git a/templates/show_tasks.html b/templates/show_tasks.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Show tasks</title>
+</head>
+<body>
+<h1>Existing tasks</h1>
+     <p>Here you can see all existing tasks</p>
+<ul>
+    {% for task in tasks_list %}
+        <li>{{ task }}</li>
+    {% endfor %}
+</ul>
+
+<p><a href="{{ url_for('index') }}">Come back home</a></p>
+
+</body>
+</html>
diff --git a/todo_list_flask.py b/todo_list_flask.py
@@ -0,0 +1,71 @@
+'''
+Created on Apr 11, 2016
+Copyright (c) 2015-2016 Teodoro Montanaro
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License
+@author: tmontanaro
+'''
+
+
+from flask import Flask, url_for, render_template, request, redirect
+import db_interaction
+
+
+app = Flask(__name__)
+
+@app.route('/')
+def hello_world():
+    # if no address is given, redirect to the index page
+    return redirect(url_for('index'))
+
+@app.route('/index.html')
+def index():
+    return render_template('index.html')
+
+
+@app.route('/insert_task.html', methods=['GET', 'POST'])
+def insert_task():
+    if request.method == 'POST':
+        if ('string_for_insertion' in request.form and request.form['string_for_insertion']!=''):
+            string_for_insertion = request.form['string_for_insertion']
+            if ('urgent_for_insertion' in request.form and request.form['urgent_for_insertion'] == 'on'):
+                urgent_for_insertion = 1
+            else:
+                urgent_for_insertion = 0
+            db_interaction.db_insert_task(string_for_insertion, urgent_for_insertion)
+        else:
+            string_for_insertion = ""
+    else:
+        string_for_insertion = ""
+    return render_template('insert_task.html', string_for_insertion = string_for_insertion)
+
+@app.route('/show_tasks.html')
+def show_tasks():
+    tasks_list = db_interaction.get_sorted_tasks_list()
+    return render_template('show_tasks.html', tasks_list=tasks_list)
+
+@app.route('/delete_task.html', methods=['GET', 'POST'])
+def delete_task():
+    if request.method == 'POST':
+        if 'substring_for_delete' in request.form:
+            substring_for_delete = request.form['substring_for_delete']
+            db_interaction.db_remove_task(substring_for_delete)
+        else:
+            substring_for_delete = ""
+    else:
+        substring_for_delete = ""
+    tasks_list = db_interaction.get_sorted_tasks_list()
+    return render_template('delete_task.html', substring_for_delete = substring_for_delete, tasks_list=tasks_list)
+
+
+if __name__ == '__main__':
+    app.run(debug=True)