2023-03-21 16:37:41 -03:00
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#!/bin/bash
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# this is just a library
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# you will need to provide the following in the implementation:
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# 1. the api url with it's corresponding token as
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# api_url="api.telegram.org/bot[insert your api token]/"
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# pay attention to the trailing forward slash
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# 2. the bot id as
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# bot_id="[insert your bot_id]"
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# 3. the following files to read and write from
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# updates.txt
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# sentmessages.txt
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# callbacks.txt
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# pay attention to the trailing forward slash
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# 4. (optional) a directory for the bot's files as
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# bot_tmpdir="/some/path/"
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# pay attention to the trailing forward slash
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# IMPORTANT: this library is not asynchronous, only one message
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# is read at a time and is done so in order
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# IMPORTANT: this library uses the getUpdates method with
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# tcp_keepalive,NOT webhooks
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calc_offset() {
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local current="$(bc -l <<< "$(tail -n 1 "${bot_tmpdir}updates.txt" | \
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grep -om1 "\"update_id\":[0-9]\+" | \
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grep -om1 "[0-9]\+") + 1" 2>/dev/null)"
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[ ! -z "${current}" ] && printf "%d" "${current}"
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}
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getupd() {
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local offset="$(calc_offset)"
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local update="$(curl -sX GET --keepalive-time 300 "${api_url}getUpdates" -d "offset=${offset}" \
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-d "limit=1" -d "timeout=300"\
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| sed 's/{"ok":true,"result":\[\]}\|^{"ok":false.*\|^{"ok":true,"result":\[{\?//g;:a;N;$!ba;s/\n//g;s/}\]}$//g;')"
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printf "%s" ${update}
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[ ! -z "${update}" ] && printf "%s\n" "${update}" >> "${bot_tmpdir}updates.txt"
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}
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getmsg_id() {
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2023-03-21 20:41:56 -03:00
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tail -n1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-22 11:41:33 -03:00
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"\"message\":{\"message_id\":[0-9]\+\|^\"message_id\":[0-9]\+" | grep -om1 "[0-9]\+"
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2023-03-21 16:37:41 -03:00
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}
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getusr_id() {
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2023-03-21 20:41:56 -03:00
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tail -n1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-21 16:37:41 -03:00
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"\"from\":{\"id\":[0-9]\+" | grep -om1 "[0-9]\+"
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}
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getchat_id() {
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2023-03-21 20:41:56 -03:00
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tail -n1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-21 16:37:41 -03:00
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"\"chat\":{\"id\":-\?[0-9]\+" | grep -om1 "\-\?[0-9]\+"
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}
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utf-16-surrogate-pair-decode() {
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# shamelessly stolen from stackoverflow
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local out="$1"
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local remain=""
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local regexp='(.*)\\u[dD]([0-9a-fA-F]{3})\\u[dD]([0-9a-fA-F]{3})(.*)'
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while [[ "${out}" =~ $regexp ]] ; do
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# match 2 \udxxx hex values, calculate new U, then split and replace
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local W1="$(( ( 0xd${BASH_REMATCH[2]} & 0x3ff) <<10 ))"
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local W2="$(( 0xd${BASH_REMATCH[3]} & 0x3ff ))"
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U="$(( ( W1 | W2 ) + 0x10000 ))"
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remain="$(printf '\\U%8.8x' "${U}")${BASH_REMATCH[4]}${remain}"
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out="${BASH_REMATCH[1]}"
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done
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echo -e "${out}${remain}"
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}
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gettext() {
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2023-03-21 20:41:56 -03:00
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local text="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-22 08:14:48 -03:00
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'{\?\("text"\|"caption"\):"\(\\"\|[^"]*\)*"\(,\|}\)' | grep -v "^{" | tail -n1)"
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2023-03-21 16:37:41 -03:00
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grep "^\"text\"" <<< "${text}" >/dev/null && utf-16-surrogate-pair-decode "${text:8:-2}"\
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|| {
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grep "^\"caption\"" <<< "${text}" >/dev/null && utf-16-surrogate-pair-decode "${text:11:-2}"
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}
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}
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getusr_name(){
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2023-03-21 20:41:56 -03:00
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local user_name="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-21 16:37:41 -03:00
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'"first_name":"\(\\"\|[^"]*\)*",\("username"\|"language_code"\)' | head -n1)"
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grep "\"username\"$" <<< "${user_name}" >/dev/null && utf-16-surrogate-pair-decode "${user_name:14:-12}"\
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|| {
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grep "\"language_code\"$" <<< "${user_name}" >/dev/null && utf-16-surrogate-pair-decode "${user_name:14:-17}"
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}
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}
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getusrname(){
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2023-03-21 20:41:56 -03:00
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local username="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-22 11:41:33 -03:00
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'"username":"\(\\"\|[^"]*\)*"\(,"language_code"\|},"chat"\)' | head -n1)"
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grep "\"language_code\"$" <<< "${username}" >/dev/null && utf-16-surrogate-pair-decode "${user_name:12:-17}"\
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|| {
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grep "},\"chat\"$" <<< "${username}" >/dev/null && utf-16-surrogate-pair-decode "${username:12:-9}"
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}
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2023-03-21 16:37:41 -03:00
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}
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getchat_title(){
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2023-03-21 20:41:56 -03:00
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local chat_title="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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2023-03-21 16:37:41 -03:00
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'"title":"\(\\"\|[^"]*\)*","type":"group"' | head -n1)"
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[ ! -z "${chat_title}" ] && utf-16-surrogate-pair-decode "${chat_title:9:-16}"\
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|| getusr_name
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}
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get_cbks() {
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2023-03-21 20:41:56 -03:00
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local callbacks="$(tail -n 1 "${bot_tmpdir}${1}"\
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2023-03-21 16:37:41 -03:00
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| grep "\"callback_query\"" | grep "\"callback_data\":\"recheck\"")"
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[ ! -z "${callbacks}" ] && is_callback=0 && printf "%s\n" "${callbacks}"\
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>> "${bot_tmpdir}callbacks.txt"
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}
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sendmsg() {
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sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${1}" \
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-d "text=${2}" \
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-d 'reply_markup={"inline_keyboard":[[{"text":"check again","callback_data":"recheck"}]]}')" \
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&& [ ! -z "${sentmsg}" ] && printf "%s\n" "${sentmsg}"\
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| sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g'\
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>> "${bot_tmpdir}sentmsgs.txt"
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}
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replymsg() {
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sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${curmsg[chat_id]}" -d "reply_to_message_id=${curmsg[message_id]}" \
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-d "text=${curmsg[text]}" \
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&& [ ! -z "${sentmsg}" ] && printf "%s\n" "${sentmsg}"\
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| sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g'\
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>> "${bot_tmpdir}sentmsgs.txt"
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}
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# TODO
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#editmsg() {
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# curl -sX GET "${api_url}editMessageText" -d "chat_id=${1}" -d "message_id=${2}" \
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# -d "text=${3}"
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#}
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#
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#delmsg() {
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# curl -sX GET "${api_url}deleteMessage" -d "chat_id=${1}"\
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# -d "message_id=${2}"
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#}
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getmsg_content(){
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local -n _REF="${1}"
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2023-03-21 20:41:56 -03:00
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_REF[user_id]="$(getusr_id "${2}")"
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_REF[user_name]="$(getusr_name "${2}")"
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_REF[username]="$(getusrname "${2}")"
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_REF[chat_id]="$(getchat_id "${2}")"
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_REF[chat_title]="$(getchat_title "${2}")"
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_REF[msg_id]="$(getmsg_id "${2}")"
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_REF[text]="$(gettext "${2}")"
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2023-03-21 16:37:41 -03:00
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}
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