648 lines
19 KiB
Python
648 lines
19 KiB
Python
#!/usr/bin/env python
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# PYTHON_ARGCOMPLETE_OK
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"""CLI.
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This module acts as a command line interface for python-escpos. It mirrors
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closely the available ESCPOS commands while adding a couple extra ones for convenience.
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It requires you to have a configuration file. See documentation for details.
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"""
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import argparse
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import platform
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from typing import Any, Dict, List
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try:
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import argcomplete
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except ImportError:
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# this CLI works nevertheless without argcomplete
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pass # noqa
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import sys
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import six
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from . import config
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from . import printer as escpos_printer_module
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from . import version
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# Must be defined before it's used in DEMO_FUNCTIONS
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def str_to_bool(string):
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"""Convert string to bool.
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Used as a type in argparse so that we get back a proper
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bool instead of always True.
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"""
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return string.lower() in ("y", "yes", "1", "true")
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# A list of functions that work better with a newline to be sent after them.
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REQUIRES_NEWLINE = ("qr", "barcode", "text", "block_text")
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# Used in demo method
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# Key: The name of escpos function and the argument passed on the CLI. Some
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# manual translation is done in the case of barcodes_a -> barcode.
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# Value: A list of dictionaries to pass to the escpos function as arguments.
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DEMO_FUNCTIONS = {
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"text": [
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{
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"txt": "Hello, World!\n",
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}
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],
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"qr": [
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{"content": "This tests a QR code"},
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{"content": "https://en.wikipedia.org/"},
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],
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"barcodes_a": [
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{"bc": "UPC-A", "code": "13243546576"},
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{"bc": "UPC-E", "code": "132435"},
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{"bc": "EAN13", "code": "4006381333931"},
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{"bc": "EAN8", "code": "1324354"},
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{"bc": "CODE39", "code": "TEST"},
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{"bc": "ITF", "code": "55867492279103"},
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{"bc": "NW7", "code": "A00000000A"},
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],
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"barcodes_b": [
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{"bc": "UPC-A", "code": "13243546576", "function_type": "B"},
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{"bc": "UPC-E", "code": "132435", "function_type": "B"},
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{"bc": "EAN13", "code": "4006381333931", "function_type": "B"},
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{"bc": "EAN8", "code": "1324354", "function_type": "B"},
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{"bc": "CODE39", "code": "TEST", "function_type": "B"},
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{"bc": "ITF", "code": "55867492279103", "function_type": "B"},
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{"bc": "NW7", "code": "A00000000A", "function_type": "B"},
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{"bc": "CODE93", "code": "A00000000A", "function_type": "B"},
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{"bc": "CODE93", "code": "1324354657687", "function_type": "B"},
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{"bc": "CODE128A", "code": "TEST", "function_type": "B"},
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{"bc": "CODE128B", "code": "TEST", "function_type": "B"},
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{"bc": "CODE128C", "code": "TEST", "function_type": "B"},
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{"bc": "GS1-128", "code": "00123456780000000001", "function_type": "B"},
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{
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"bc": "GS1 DataBar Omnidirectional",
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"code": "0000000000000",
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"function_type": "B",
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},
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{"bc": "GS1 DataBar Truncated", "code": "0000000000000", "function_type": "B"},
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{"bc": "GS1 DataBar Limited", "code": "0000000000000", "function_type": "B"},
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{"bc": "GS1 DataBar Expanded", "code": "00AAAAAAA", "function_type": "B"},
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],
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}
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# Used to build the CLI
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# A list of dictionaries. Each dict is a CLI argument.
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# Keys:
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# parser: A dict of args for command_parsers.add_parser
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# defaults: A dict of args for subparser.set_defaults
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# arguments: A list of dicts of args for subparser.add_argument
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ESCPOS_COMMANDS: List[Dict[str, Any]] = [
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{
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"parser": {
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"name": "qr",
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"help": "Print a QR code",
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},
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"defaults": {
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"func": "qr",
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},
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"arguments": [
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{
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"option_strings": ("--content",),
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"help": "Text to print as a qr code",
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"required": True,
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},
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{
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"option_strings": ("--size",),
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"help": "QR code size (1-16) [default:3]",
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"required": False,
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"type": int,
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},
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],
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},
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{
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"parser": {
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"name": "barcode",
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"help": "Print a barcode",
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},
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"defaults": {
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"func": "barcode",
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},
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"arguments": [
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{
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"option_strings": ("--code",),
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"help": "Barcode data to print",
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"required": True,
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},
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{
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"option_strings": ("--bc",),
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"help": "Barcode format",
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"required": True,
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},
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{
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"option_strings": ("--height",),
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"help": "Barcode height in px",
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"type": int,
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},
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{
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"option_strings": ("--width",),
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"help": "Barcode width",
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"type": int,
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},
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{
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"option_strings": ("--pos",),
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"help": "Label position",
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"choices": ["BELOW", "ABOVE", "BOTH", "OFF"],
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},
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{
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"option_strings": ("--font",),
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"help": "Label font",
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"choices": ["A", "B"],
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},
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{
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"option_strings": ("--align_ct",),
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"help": "Align barcode center",
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"type": str_to_bool,
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},
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{
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"option_strings": ("--function_type",),
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"help": "ESCPOS function type",
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"choices": ["A", "B"],
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},
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{
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"option_strings": ("--force_software",),
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"help": "Force render and print barcode as an image",
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"choices": ["graphics", "bitImageColumn", "bitImageRaster"],
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},
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],
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},
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{
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"parser": {
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"name": "text",
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"help": "Print plain text",
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},
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"defaults": {
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"func": "text",
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},
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"arguments": [
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{
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"option_strings": ("--txt",),
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"help": "Plain text to print",
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"required": True,
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}
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],
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},
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{
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"parser": {
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"name": "block_text",
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"help": "Print wrapped text",
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},
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"defaults": {
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"func": "block_text",
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},
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"arguments": [
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{
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"option_strings": ("--txt",),
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"help": "block_text to print",
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"required": True,
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},
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{
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"option_strings": ("--columns",),
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"help": "Number of columns",
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"type": int,
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},
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],
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},
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{
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"parser": {
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"name": "cut",
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"help": "Cut the paper",
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},
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"defaults": {
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"func": "cut",
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},
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"arguments": [
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{
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"option_strings": ("--mode",),
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"help": "Type of cut",
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"choices": ["FULL", "PART"],
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},
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],
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},
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{
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"parser": {
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"name": "cashdraw",
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"help": "Kick the cash drawer",
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},
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"defaults": {
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"func": "cashdraw",
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},
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"arguments": [
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{
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"option_strings": ("--pin",),
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"help": "Which PIN to kick",
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"choices": [2, 5],
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},
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],
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},
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{
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"parser": {
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"name": "image",
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"help": "Print an image",
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},
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"defaults": {
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"func": "image",
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},
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"arguments": [
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{
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"option_strings": ("--img_source",),
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"help": "Path to image",
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"required": True,
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},
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{
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"option_strings": ("--impl",),
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"help": "Implementation to use",
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"choices": ["bitImageRaster", "bitImageColumn", "graphics"],
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},
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{
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"option_strings": ("--high_density_horizontal",),
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"help": "Image density (horizontal)",
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"type": str_to_bool,
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},
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{
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"option_strings": ("--high_density_vertical",),
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"help": "Image density (vertical)",
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"type": str_to_bool,
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},
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],
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},
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{
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"parser": {
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"name": "fullimage",
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"help": "Print a fullimage",
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},
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"defaults": {
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"func": "fullimage",
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},
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"arguments": [
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{
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"option_strings": ("--img",),
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"help": "Path to img",
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"required": True,
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},
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{
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"option_strings": ("--max_height",),
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"help": "Max height of image in px",
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"type": int,
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},
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{
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"option_strings": ("--width",),
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"help": "Max width of image in px",
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"type": int,
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},
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{
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"option_strings": ("--histeq",),
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"help": "Equalize the histogram",
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"type": str_to_bool,
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},
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{
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"option_strings": ("--bandsize",),
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"help": "Size of bands to divide into when printing",
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"type": int,
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},
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],
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},
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{
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"parser": {
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"name": "charcode",
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"help": "Set character code table",
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},
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"defaults": {
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"func": "charcode",
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},
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"arguments": [
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{
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"option_strings": ("--code",),
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"help": "Character code",
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"required": True,
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},
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],
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},
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{
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"parser": {
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"name": "set",
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"help": "Set text properties",
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},
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"defaults": {
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"func": "set",
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},
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"arguments": [
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{
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"option_strings": ("--align",),
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"help": "Horizontal alignment",
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"choices": ["left", "center", "right"],
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},
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{
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"option_strings": ("--font",),
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"help": "Font choice",
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"choices": ["left", "center", "right"],
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},
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{
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"option_strings": ("--text_type",),
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"help": "Text properties",
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"choices": ["B", "U", "U2", "BU", "BU2", "NORMAL"],
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},
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{
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"option_strings": ("--width",),
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"help": "Width multiplier",
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"type": int,
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},
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{
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"option_strings": ("--height",),
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"help": "Height multiplier",
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"type": int,
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},
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{
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"option_strings": ("--density",),
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"help": "Print density",
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"type": int,
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},
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{
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"option_strings": ("--invert",),
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"help": "White on black printing",
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"type": str_to_bool,
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},
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{
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"option_strings": ("--smooth",),
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"help": "Text smoothing. Effective on >: 4x4 text",
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"type": str_to_bool,
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},
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{
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"option_strings": ("--flip",),
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"help": "Text smoothing. Effective on >: 4x4 text",
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"type": str_to_bool,
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},
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],
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},
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{
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"parser": {
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"name": "hw",
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"help": "Hardware operations",
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},
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"defaults": {
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"func": "hw",
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},
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"arguments": [
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{
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"option_strings": ("--hw",),
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"help": "Operation",
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"choices": ["INIT", "SELECT", "RESET"],
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"required": True,
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},
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],
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},
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{
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"parser": {
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"name": "control",
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"help": "Control sequences",
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},
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"defaults": {
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"func": "control",
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},
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"arguments": [
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{
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"option_strings": ("--ctl",),
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"help": "Control sequence",
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"choices": ["LF", "FF", "CR", "HT", "VT"],
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"required": True,
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},
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{
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"option_strings": ("--pos",),
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"help": "Horizontal tab position (1-4)",
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"type": int,
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},
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],
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},
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{
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"parser": {
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"name": "panel_buttons",
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"help": "Controls panel buttons",
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},
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"defaults": {
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"func": "panel_buttons",
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},
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"arguments": [
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{
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"option_strings": ("--enable",),
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"help": "Feed button enabled",
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"type": str_to_bool,
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"required": True,
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},
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],
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},
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{
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"parser": {
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"name": "raw",
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"help": "Raw data",
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},
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"defaults": {
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"func": "_raw",
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},
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"arguments": [
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{
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"option_strings": ("--msg",),
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"help": "Raw data to send",
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"required": True,
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},
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],
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},
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]
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def print_extended_information() -> None:
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"""Print diagnostic information for bug reports."""
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print(f"* python-escpos version: `{version.version}`")
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print(
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f"* python version: `{platform.python_implementation()} v{platform.python_version()}`"
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)
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print(f"* platform: `{platform.platform()}`")
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print(
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f"* printer driver `USB` is usable: `{escpos_printer_module.Usb.is_usable()}`"
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)
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print(
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f"* printer driver `File` is usable: `{escpos_printer_module.File.is_usable()}`"
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)
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print(
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f"* printer driver `Network` is usable: `{escpos_printer_module.Network.is_usable()}`"
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)
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print(
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f"* printer driver `Serial` is usable: `{escpos_printer_module.Serial.is_usable()}`"
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)
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print(f"* printer driver `LP` is usable: `{escpos_printer_module.LP.is_usable()}`")
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print(
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f"* printer driver `Dummy` is usable: `{escpos_printer_module.Dummy.is_usable()}`"
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)
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print(
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f"* printer driver `CupsPrinter` is usable: `{escpos_printer_module.CupsPrinter.is_usable()}`"
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)
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print(
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f"* printer driver `Win32Raw` is usable: `{escpos_printer_module.Win32Raw.is_usable()}`"
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)
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def generate_parser() -> argparse.ArgumentParser:
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"""Generate an argparse parser."""
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parser = argparse.ArgumentParser(
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description="CLI for python-escpos",
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epilog="Printer configuration is defined in the python-escpos config"
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"file. See documentation for details.",
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)
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parser.register("type", "bool", str_to_bool)
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# Allow config file location to be passed
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parser.add_argument(
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"-c",
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"--config",
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help="Alternate path to the configuration file",
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)
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# Everything interesting runs off of a subparser so we can use the format
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# cli [subparser] -args
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command_subparsers = parser.add_subparsers(
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title="ESCPOS Command",
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dest="parser",
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)
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# fix inconsistencies in the behaviour of some versions of argparse
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command_subparsers.required = False # force 'required' testing
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# Build the ESCPOS command arguments
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for command in ESCPOS_COMMANDS:
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parser_command = command_subparsers.add_parser(**command["parser"])
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parser_command.set_defaults(**command["defaults"])
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for argument in command["arguments"]:
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option_strings = argument.pop("option_strings")
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parser_command.add_argument(*option_strings, **argument)
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# Build any custom arguments
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parser_command_demo = command_subparsers.add_parser(
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"demo", help="Demonstrates various functions"
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)
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parser_command_demo.set_defaults(func="demo")
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demo_group = parser_command_demo.add_mutually_exclusive_group()
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demo_group.add_argument(
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"--barcodes-a",
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help="Print demo barcodes for function type A",
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action="store_true",
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)
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demo_group.add_argument(
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"--barcodes-b",
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help="Print demo barcodes for function type B",
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action="store_true",
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)
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demo_group.add_argument(
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"--qr",
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help="Print some demo QR codes",
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action="store_true",
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)
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demo_group.add_argument(
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"--text",
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help="Print some demo text",
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action="store_true",
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)
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parser_command_version = command_subparsers.add_parser(
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"version", help="Print the version information of python-escpos"
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)
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parser_command_version.set_defaults(version=True)
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parser_command_version_extended = command_subparsers.add_parser(
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"version_extended",
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help="Print the extended version information of python-escpos (for bug reports)",
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)
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parser_command_version_extended.set_defaults(version_extended=True)
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return parser
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def main():
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"""Handle main entry point of CLI script.
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Handles loading of configuration and creating and processing of command
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line arguments. Called when run from a CLI.
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"""
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parser = generate_parser()
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# hook in argcomplete
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if "argcomplete" in globals():
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argcomplete.autocomplete(parser)
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# Get only arguments actually passed
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args_dict = vars(parser.parse_args())
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if not args_dict:
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parser.print_help()
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sys.exit()
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command_arguments = dict(
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[k, v] for k, v in six.iteritems(args_dict) if v is not None
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)
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# If version should be printed, do this, then exit
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print_version = command_arguments.pop("version", None)
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if print_version:
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print(version.version)
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sys.exit()
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print_version_extended = command_arguments.pop("version_extended", None)
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if print_version_extended:
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print_extended_information()
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sys.exit()
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# If there was a config path passed, grab it
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config_path = command_arguments.pop("config", None)
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# Load the configuration and defined printer
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saved_config = config.Config()
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saved_config.load(config_path)
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printer = saved_config.printer()
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if not printer:
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raise Exception("No printers loaded from config")
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target_command = command_arguments.pop("func")
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# remove helper-argument 'parser' from dict
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command_arguments.pop("parser", None)
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if hasattr(printer, target_command):
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# print command with args
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getattr(printer, target_command)(**command_arguments)
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if target_command in REQUIRES_NEWLINE:
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printer.text("\n")
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else:
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command_arguments["printer"] = printer
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globals()[target_command](**command_arguments)
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def demo(printer, **kwargs):
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"""Print demos.
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|
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|
Called when CLI is passed `demo`. This function
|
|
uses the DEMO_FUNCTIONS dictionary.
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:param printer: A printer from escpos.printer
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|
:param kwargs: A dict with a key for each function you want to test. It's
|
|
in this format since it usually comes from argparse.
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"""
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for demo_choice in kwargs.keys():
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command = getattr(
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printer,
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demo_choice.replace("barcodes_a", "barcode").replace(
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"barcodes_b", "barcode"
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),
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)
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for params in DEMO_FUNCTIONS[demo_choice]:
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command(**params)
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printer.cut()
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if __name__ == "__main__":
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main()
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