#!/usr/bin/env python3
# SPDX-FileCopyrightText: © 2019 The freestyle-hid Authors
# SPDX-License-Identifier: Apache-2.0
"""CLI tool to send messages through FreeStyle HID protocol."""
import logging
import pathlib
import sys
from typing import Optional
import click
import click_log
import freestyle_hid
logger = logging.getLogger()
click_log.basic_config(logger)
@click.command()
@click_log.simple_verbosity_option(logger, "--vlog")
@click.option(
"--text-command-type",
"-c",
type=int,
default=0x60,
help="Message type for text commands sent to the device.",
)
@click.option(
"--text-reply-type",
"-r",
type=int,
default=0x60,
help="Message type for text replies received from the device.",
)
@click.option(
"--product-id",
"-p",
type=int,
help="Optional product ID (in alternative to the device path)",
)
@click.option(
"--encoding",
"-e",
type=str,
help="Encoding to use to decode commands returned by the meter",
default="ascii",
)
@click.option(
"--encrypted-protocol / --no-encrypted-protocol",
default=False,
help=(
"Whether to use the encrypted protocol to communicate to the device."
" This is necessary to talk to Libre2 glucometers."
),
)
@click.argument(
"device-path",
type=click.Path(exists=True, dir_okay=False, writable=True, allow_dash=False),
callback=lambda ctx, param, value: pathlib.Path(value) if value else None,
required=False,
)
def main(
*,
text_command_type: int,
text_reply_type: int,
product_id: Optional[int],
device_path: Optional[pathlib.Path],
encoding: str,
encrypted_protocol: bool,
):
if not product_id and not device_path:
raise click.UsageError(
"One of --product-id or DEVICE_PATH need to be provided."
)
session = freestyle_hid.Session(
product_id,
device_path,
text_command_type,
text_reply_type,
encoding=encoding,
encrypted=encrypted_protocol,
)
session.connect()
while True:
if sys.stdin.isatty():
command = input(">>> ")
else:
command = input()
print(f">>> {command}")
try:
print(session.send_text_command(bytes(command, "ascii")))
except freestyle_hid.CommandError as error:
print(f"! {error!r}")
if __name__ == "__main__":
main()
