def read_file():
    try:
        with open('text.txt') as f:
            return f.readlines()
    except FileNotFoundError:
        return 'Source file missing or corrupted.'

def write_file(contents: str):
    with open('text.txt', 'a') as f:
        f.write(contents)

@app.route('/update', methods=['POST'])
def update():
    contents = request.form['input']
    write_file(contents)
    write_file(' - ')
    write_file(getdate())
    write_file('n')
    return redirect('/editor')

@app.route('/editor')
def editor():
    contents = read_file()
    date = getdate()
    return render_template('editor.html',
                           contents = contents,
                           title='Editor',
                           date = date)