class Calendar:
printer = None
url = 'GOOGLE_CALENDAR_URL'
def __enter__(self):
return self
def __exit__(self, *_):
pass
def start(self):
""" La méthode qui s'occupe de tout gérer. """
events = self.get_events()
if events:
if not self.set_printer():
return 1
self.print_data(events)
return 0
def set_printer(self):
""" Connection to the printer. """
self.printer = ThermalPrinter()
return self.printer.status()['paper']
def get_events(self):
""" Retrieve events of the day. """
now = utc.localize(datetime.utcnow())
events = icalevents.events(url=self.url, end=now + timedelta(days=1))
data = []
for event in events:
data.append((event.start.strftime('%H:%M'),
event.end.strftime('%H:%M'), event.summary))
return sorted(set(data), key=lambda x: x[0])
def print_data(self, events):
""" Just print. """
def header():
""" Print the header. """
self.printer.codepage(CodePage.ISO_8859_1)
self.printer.feed()
self.printer.image(Image.open('agenda.png'))
self.printer.feed()
def line(evt, first_line=False, last_line=False):
""" Impression d'un événement. """
start, end, sumary = evt
hour = '{} - {}'.format(start, end)
if start == end:
hour = 'Whole day'
if first_line:
self.printer.out(b'\xd5',
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(b'\xcd' * (self.printer.max_column - 2),
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(b'\xb8', codepage=CodePage.CP437)
self.printer.out(b'\xb3', line_feed=False, codepage=CodePage.CP437)
self.printer.out(' {0: <{1}} '.format(hour,
self.printer.max_column - 4),
line_feed=False,
codepage=CodePage.ISO_8859_1)
self.printer.out(b'\xb3', codepage=CodePage.CP437)
for line_ in wrap(sumary, self.printer.max_column - 4):
self.printer.out(b'\xb3',
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(' {0: <{1}} '.format(
line_, self.printer.max_column - 4),
line_feed=False,
codepage=CodePage.ISO_8859_1)
self.printer.out(b'\xb3', codepage=CodePage.CP437)
if not last_line:
self.printer.out(b'\xc3',
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(b'\xc4' * (self.printer.max_column - 2),
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(b'\xb4', codepage=CodePage.CP437)
else:
self.printer.out(b'\xd4',
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(b'\xcd' * (self.printer.max_column - 2),
line_feed=False,
codepage=CodePage.CP437)
self.printer.out(b'\xbe', codepage=CodePage.CP437)
def footer():
""" Printed the footer. """
self.printer.feed()
self.printer.out('Have a nice day :)',
justify='C',
codepage=CodePage.ISO_8859_1)
self.printer.feed(4)
header()
if events:
first, last = events[0], events[-1]
for event in events:
line(event, first_line=event is first, last_line=event is last)
footer()
return self.printer.status()['paper']
class PrinterWrapper:
def __init__(self, print_welcome=True):
self.printer = ThermalPrinter("/dev/serial0",
9600,
heat_time=60,
heat_interval=15)
if check_printer_status(self.printer):
if print_welcome:
self.print_boot_image()
self.printer.sleep()
def print_boot_image(self):
self.printer.image(Image.open(image_path), True)
self.printer.feed(3)
# function also wraps by words
# look at string, count characters
def print_line(self, text, formatting=None):
if formatting is None:
formatting = {
'justify': 'C',
'size': 'L',
'bold': False,
'upside_down': False,
'underline': 0
}
if check_printer_status(self.printer):
max_col = (self.printer.max_column /
(2 if formatting['size'] == 'L' else 1)) - 1
print("Max col", self.printer.max_column)
text = textwrap.fill(text, max_col)
self.printer.wake()
self.printer.out(text,
justify=formatting['justify'],
size=formatting['size'],
bold=formatting['bold'],
upside_down=formatting['upside_down'],
underline=formatting['underline'])
self.printer.feed(1)
self.printer.sleep()
else:
self.printer.sleep()
raise RuntimeError("Printer is out of paper")
def print_image(self, image_data, is_data_uri=True):
if is_data_uri:
image = get_image_from_data_uri(data_uri=image_data)
else:
image = image_data
self.printer.wake()
self.printer.image(image)
self.printer.sleep()
def print_signature(self, sig):
self.printer.wake()
date_string = get_date_string()
# padding to right-justify the timestamp (date_sting)
space_padding = ' ' * (self.printer.max_column - 1 -
(len(date_string) + len(sig)))
self.printer.out('', line_feed=True)
self.printer.out(f'{sig}{space_padding}{date_string}'.strip(),
justify='L',
size='S',
underline=False)
self.printer.feed(3)
self.printer.sleep()
def get_status(self):
try:
return self.printer.status()
except:
return {}
