pos-printer-server/print_log.py

#!/bin/env python3
from escpos.printer import Usb
import getopt
import sys
import datetime

TEXT_LIMIT=256

class PrintOptions:
    title = None
    text = None
    verbose = False
    image = None

def get_printer():
    return Usb(0x0525, 0xa700) # <-- change based on your printer vendor and product ID

def do_print(options):
    p = get_printer()
    p.set(align='center')
    p.text(str(datetime.datetime.now().strftime("%H:%M:%S")))
    p.text('         ')
    p.text(str(datetime.date.today()))
    p.text('\n')
    if (options.title):
        p.set(align='center', text_type='B') # center bold
        p.text(options.title + '\n')
    p.set()
    if len(options.text) > TEXT_LIMIT:
        p.text(options.text[:TEXT_LIMIT] + '[...]\n(truncated)')
    else:
        p.text(options.text + '\n')
    if options.image != None:
        p.image(options.image)
    p.cut()

def do_print_image(path):
    p = get_printer()
    p.image(path)
    p.cut()

def usage():
    print(f'usage: {sys.argv[0]} [OPTIONS] TEXT...')
    print(f'  OPTIONS')
    print(f'    -v ... verbose')
    print(f'    -h ... help')
    print(f'    -t --title=X ... title to prepend')
    print(f'    -i --image=X ... image path')
    print(f'  TEXT is taken as the rest of argumenats if present,')
    print(f'    otherwise from STDIN (terminated by Ctrl+D).')

def main():
    try:
        opts, args = getopt.getopt(sys.argv[1:], "ht:i:v", ["help", "title=", "image="])
    except getopt.GetoptError as err:
        print(err)
        usage()
        sys.exit(2)
    title = None
    verbose = False
    image = None
    for o, a in opts:
        if o == "-v":
            verbose = True
        elif o in ("-h", "--help"):
            usage()
            sys.exit()
        elif o in ("-i", "--image"):
            image = a
        elif o in ("-t", "--title"):
            title = a
        else:
            assert False, "unhandled option"
    options = PrintOptions()
    options.title = title
    options.verbose = verbose
    options.text = " ".join(args)
    options.image = image
    if len(options.text) <= 0:
        for line in sys.stdin:
            options.text = options.text + line
    do_print(options)

if __name__ == "__main__":
    main()