💫 Create Python app

Author: devenes

phonebook-app.py

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+# Import Flask modules
+from flask import Flask, request, render_template
+from flaskext.mysql import MySQL
+
+# Create an object named app
+app = Flask(__name__)
+
+# Configure mysql database
+app.config['MYSQL_DATABASE_HOST'] = 'database'
+app.config['MYSQL_DATABASE_USER'] = 'admin'
+app.config['MYSQL_DATABASE_PASSWORD'] = 'Devenes_123'
+app.config['MYSQL_DATABASE_DB'] = 'phonebook_db'
+app.config['MYSQL_DATABASE_PORT'] = 3306
+mysql = MySQL()
+mysql.init_app(app)
+connection = mysql.connect()
+connection.autocommit(True)
+cursor = connection.cursor()
+
+
+# Write a function named `find_persons` which finds persons' record using the keyword from the phonebook table in the db,
+# and returns result as list of dictionary
+# `[{'id': 1, 'name':'XXXX', 'number': 'XXXXXX'}]`.
+def find_persons(keyword):
+    query = f"""
+    SELECT * FROM phonebook WHERE name like '%{keyword.strip().lower()}%';
+    """
+    cursor.execute(query)
+    result = cursor.fetchall()
+    persons = [{'id': row[0], 'name':row[1].strip().title(), 'number':row[2]}
+               for row in result]
+    if len(persons) == 0:
+        persons = [{'name': 'No Result', 'number': 'No Result'}]
+    return persons
+
+
+# Write a function named `insert_person` which inserts person into the phonebook table in the db,
+# and returns text info about result of the operation
+def insert_person(name, number):
+    query = f"""
+    SELECT * FROM phonebook WHERE name like '{name.strip().lower()}';
+    """
+    cursor.execute(query)
+    row = cursor.fetchone()
+    if row is not None:
+        return f'Person with name {row[1].title()} already exits.'
+
+    insert = f"""
+    INSERT INTO phonebook (name, number)
+    VALUES ('{name.strip().lower()}', '{number}');
+    """
+    cursor.execute(insert)
+    result = cursor.fetchall()
+    return f'Person {name.strip().title()} added to Phonebook successfully'
+
+
+# Write a function named `update_person` which updates the person's record in the phonebook table,
+# and returns text info about result of the operation
+def update_person(name, number):
+    query = f"""
+    SELECT * FROM phonebook WHERE name like '{name.strip().lower()}';
+    """
+    cursor.execute(query)
+    row = cursor.fetchone()
+    if row is None:
+        return f'Person with name {name.strip().title()} does not exist.'
+
+    update = f"""
+    UPDATE phonebook
+    SET name='{row[1]}', number = '{number}'
+    WHERE id= {row[0]};
+    """
+    cursor.execute(update)
+
+    return f'Phone record of {name.strip().title()} is updated successfully'
+
+
+# Write a function named `delete_person` which deletes person record from the phonebook table in the db,
+# and returns returns text info about result of the operation
+def delete_person(name):
+    query = f"""
+    SELECT * FROM phonebook WHERE name like '{name.strip().lower()}';
+    """
+    cursor.execute(query)
+    row = cursor.fetchone()
+    if row is None:
+        return f'Person with name {name.strip().title()} does not exist, no need to delete.'
+
+    delete = f"""
+    DELETE FROM phonebook
+    WHERE id= {row[0]};
+    """
+    cursor.execute(delete)
+    return f'Phone record of {name.strip().title()} is deleted from the phonebook successfully'
+
+
+# Write a function named `find_records` which finds phone records by keyword using `GET` and `POST` methods,
+# using template files named `index.html` given under `templates` folder
+# and assign to the static route of ('/')
+@app.route('/', methods=['GET', 'POST'])
+def find_records():
+    if request.method == 'POST':
+        keyword = request.form['username']
+        persons = find_persons(keyword)
+        return render_template('index.html', persons=persons, keyword=keyword, show_result=True, developer_name='Devenes')
+    else:
+        return render_template('index.html', show_result=False, developer_name='Devenes')
+
+
+# Write a function named `add_record` which inserts new record to the database using `GET` and `POST` methods,
+# using template files named `add-update.html` given under `templates` folder
+# and assign to the static route of ('add')
+@app.route('/add', methods=['GET', 'POST'])
+def add_record():
+    if request.method == 'POST':
+        name = request.form['username']
+        if name is None or name.strip() == "":
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Name can not be empty', show_result=False, action_name='save', developer_name='Devenes')
+        elif name.isdecimal():
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Name of person should be text', show_result=False, action_name='save', developer_name='Devenes')
+
+        phone_number = request.form['phonenumber']
+        if phone_number is None or phone_number.strip() == "":
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Phone number can not be empty', show_result=False, action_name='save', developer_name='Devenes')
+        elif not phone_number.isdecimal():
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Phone number should be in numeric format', show_result=False, action_name='save', developer_name='Devenes')
+
+        result = insert_person(name, phone_number)
+        return render_template('add-update.html', show_result=True, result=result, not_valid=False, action_name='save', developer_name='Devenes')
+    else:
+        return render_template('add-update.html', show_result=False, not_valid=False, action_name='save', developer_name='Devenes')
+
+
+# Write a function named `update_record` which updates the record in the db using `GET` and `POST` methods,
+# using template files named `add-update.html` given under `templates` folder
+# and assign to the static route of ('update')
+@app.route('/update', methods=['GET', 'POST'])
+def update_record():
+    if request.method == 'POST':
+        name = request.form['username']
+        if name is None or name.strip() == "":
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Name can not be empty', show_result=False, action_name='update', developer_name='Devenes')
+        phone_number = request.form['phonenumber']
+        if phone_number is None or phone_number.strip() == "":
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Phone number can not be empty', show_result=False, action_name='update', developer_name='Devenes')
+        elif not phone_number.isdecimal():
+            return render_template('add-update.html', not_valid=True, message='Invalid input: Phone number should be in numeric format', show_result=False, action_name='update', developer_name='Devenes')
+
+        result = update_person(name, phone_number)
+        return render_template('add-update.html', show_result=True, result=result, not_valid=False, action_name='update', developer_name='Devenes')
+    else:
+        return render_template('add-update.html', show_result=False, not_valid=False, action_name='update', developer_name='Devenes')
+
+
+# Write a function named `delete_record` which updates the record in the db using `GET` and `POST` methods,
+# using template files named `delete.html` given under `templates` folder
+# and assign to the static route of ('delete')
+@app.route('/delete', methods=['GET', 'POST'])
+def delete_record():
+    if request.method == 'POST':
+        name = request.form['username']
+        if name is None or name.strip() == "":
+            return render_template('delete.html', not_valid=True, message='Invalid input: Name can not be empty', show_result=False, developer_name='Devenes')
+        result = delete_person(name)
+        return render_template('delete.html', show_result=True, result=result, not_valid=False, developer_name='Devenes')
+    else:
+        return render_template('delete.html', show_result=False, not_valid=False, developer_name='Devenes')
+
+
+# Add a statement to run the Flask application which can be reached from any host on port 80.
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=80)