bot.sh


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214

#!/usr/bin/env dash
#
# Copyright (C) 2024 Maria Lisina
# Copyright (C) 2024 Danil Lisin
# SPDX-License-Identifier: Apache-2.0
#
# Run this software with `env -i` to avoid variable conflict

set -e
umask 77

version="2.0"
dir="${0%/*}"
cache="${dir}/cache/${$}"
config="${dir}/config"
modules="${dir}/modules"
submodules="${dir}/submodules"
units="${dir}/units"
offset=-1

if [ -n "${1}" ]
then
    while getopts hla:s:i:e: options
    do
        case "${options}" in
            (h)
                help=0
            ;;
            (l)
                local=0
            ;;
            (a)
                address="${OPTARG}"
            ;;
            (s)
                size=${OPTARG}
            ;;
            (i)
                internal="${OPTARG}"
            ;;
            (e)
                external="${OPTARG}"
            ;;
            (*)
                echo "See '${0} -h'"
                exit 1
            ;;
        esac
    done

    shift $((OPTIND - 1))
else
    help=0
fi

if [ -n "${help}" ]
then
    echo "Sekoohaka Bot v${version}" \
        "\n\nUsage: ${0} [options] [token]" \
        "\n\nOptions:" \
        "\n  -h\t\tShow help information" \
        "\n  -l\t\tSame as -a localhost:8081 -s 20971520" \
        "\n  -a <addr>\tTelegram Bot API address, default: api.telegram.org" \
        "\n  -s <size>\tMax file size allowed to send with URL, default: 10485760" \
        "\n  -i <addr>\tInternal proxy address to interact with Telegram Bot API" \
        "\n  -e <addr>\tExternal proxy address to interact with anything else"
    exit 0
fi

for required in busybox curl jq recode
do
    if ! command -v ${required} > /dev/null
    then
        missing="${missing} ${required}"
    fi
done

if [ -n "${missing}" ]
then
    echo "Missing dependencies:${missing}" \
        "\nFor more information follow: https://command-not-found.com/"
    exit 1
fi

for function in base64 bc cat cut date find grep ls mkdir rm sed seq sha1sum sleep stat tr
do
    if busybox ${function} --help > /dev/null 2>&1
    then
        alias ${function}="busybox ${function}"
    else
        missing="${missing} ${function}"
    fi
done

if [ -n "${missing}" ]
then
    echo "Missing BusyBox functions:${missing}" \
        "\nUpdate your BusyBox or get a version with all the required functions"
    exit 1
fi

if [ -n "${local}" ]
then
    address="${address:-127.0.0.1:8081}"
    size=${size:-20971520}
fi

if [ -z "${address}" ]
then
    address="https://api.telegram.org"
fi

if [ -n "${size}" ]
then
    if ! test ${size} -gt 0 > /dev/null 2>&1
    then
        echo "Illegal file size"
        exit 1
    fi
else
    size=10485760
fi

if [ -n "${1}" ]
then
    token="${1}"
    shift
fi

if [ -n "${1}" ]
then
    echo "Unrecognized action ${1}. See '${0} -h'"
    exit 1
fi

until [ -n "${token}" ]
do
    read -p "Telegram Bot API Token: " -r token
done

alias parameter="cut -d ' ' -f"
alias enhash="sha1sum | parameter 1"
alias htmlescape="sed -e 's/</\&#60;/g' -e 's/>/\&#62;/g'"
alias urlencode="jq -Rr @uri"

for ascii in $(seq 33 126)
do
    ascii_table="${ascii_table} $(printf "%b" "\0$(printf "%o" ${ascii})")"
done

rm -fr "${cache}"
mkdir -p "${cache}"
mkdir -p "${config}"

echo "PID: ${$}"

curl --get \
    --max-time 10 \
    --output "${cache}/getMe.json" \
    --proxy "${internal}" \
    --show-error \
    --silent \
    "${address}/bot${token}/getMe"

if ! jq -e '.' "${cache}/getMe.json" > /dev/null
then
    cat "${cache}/getMe.json"
    exit 1
fi

username="$(jq -r '.result.username' "${cache}/getMe.json")"

if [ "${username}" = "null" ]
then
    echo "Failed to authorize the bot"
    exit 1
fi

echo "Bot: ${username}"

while trap 'wait && exit 0' INT TERM
do
    if ! curl --data "offset=${offset}" \
        --get \
        --output "${cache}/getUpdates.json" \
        --proxy "${internal}" \
        --silent \
        "${address}/bot${token}/getUpdates"
    then
        continue
    fi

    if ! update_id="$(jq -r '.result.[0].update_id' "${cache}/getUpdates.json")"
    then
        continue
    fi

    if [ "${update_id}" != "null" ]
    then
        update="${cache}/${update_id}.json"

        if ! jq '.result.[0]' "${cache}/getUpdates.json" > "${update}"
        then
            continue
        fi

        for module in "${modules}"/*
        do
            . "${module}" &
        done

        offset=$((update_id + 1))
    fi
done