#!/usr/bin/env python3
# Illustrates how to test irkerd.
#
# First argument must be a channel URL. If it does not begin with "irc", 
# the base URL for freenode is prepended.
#
# Second argument must be a payload string.  Standard C-style escapes 
# such as \n and \t are decoded.
#
# SPDX-License-Identifier: BSD-2-Clause
import json
import socket
import sys
import fileinput

DEFAULT_SERVER = ("localhost", 6659)

def connect(server = DEFAULT_SERVER):
    return socket.create_connection(server)

def send(s, target, message):
    data = {"to": target, "privmsg" : message}
    dump = json.dumps(data)
    if not isinstance(dump, bytes):
        dump = dump.encode('ascii')
    s.sendall(dump)

def irk(target, message, server = DEFAULT_SERVER):
    s = connect(server)
    if "irc:" not in target and "ircs:" not in target:
        target = "irc://chat.freenode.net/{0}".format(target)
    if message == '-':
        for line in fileinput.input('-'):
            send(s, target, line.rstrip('\n'))
    else:
        send(s, target, message)
    s.close()

def main():
    if len(sys.argv) < 2:
        sys.stderr.write("irk: a URL argument is required\n")
        sys.exit(1)
    target = sys.argv[1]
    message = " ".join(sys.argv[2:])
    # Allows pretty formatting of irker messages
    if str == bytes:
        message = message.decode('string_escape')

    # The actual IRC limit is 512. Avoid any off-by-ones
    chunksize = 511
    try:
        while message[:chunksize]:
            irk(target, message[:chunksize])
            message = message[chunksize:]
    except socket.error as e:
        sys.stderr.write("irk: write to server failed: %r\n" % e)
        sys.exit(1)

if __name__ == '__main__':
    main()

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