224 lines
8.7 KiB
Bash
Executable File
224 lines
8.7 KiB
Bash
Executable File
#!/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 following files to read and write from
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# updates.txt
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# sentmsgs.txt
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# delmsgs.txt
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# 3. (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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# attempts to grab the last update's update_id and prints it to stdout
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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" "${current}"
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}
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# captures output of calc_offset to use as offset and fetches a single update with that offset
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# uses tcp_keepalive method for 300 seconds, but telegram only keeps the connection open for 60 seconds
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# prints result of fetching update if not empty and formats it for better use with the other functions
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getupd() {
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local offset="$(calc_offset)"
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local update="$(curl -sX GET --keepalive-time 300 "${api_url}getUpdates" -d "offset=${offset}" \
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-d "limit=1" -d "timeout=300")"
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update="$(sed 's/{"ok":true,"result":\[\]}\|^{"ok":false.*\|^{"ok":true,"result":\[{\?//g;:a;N;$!ba;s/\n//g;s/}\]}$//g;' <<< "${update}")"
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[ ! -z "${update}" ] && printf "%s\n" "${update}" >> "${bot_tmpdir}updates.txt"
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}
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# when another comment refers to "getX functions", the following are what is being refered to
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# $1 is the filename of a file with telegram JSON responses to the getupd function
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# if ${bot_tmpdir} is set, it will be appended before the filename
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getmsg_id() {
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tail -n1 "${bot_tmpdir}${1}" | grep -om1\
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"\"message\":{\"message_id\":[0-9]\+\|^\"message_id\":[0-9]\+" | grep -om1 "[0-9]\+"
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}
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getusr_id() {
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tail -n1 "${bot_tmpdir}${1}" | grep -om1\
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"\"from\":{\"id\":[0-9]\+" | grep -om1 "[0-9]\+"
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}
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getchat_id() {
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tail -n1 "${bot_tmpdir}${1}" | grep -om1\
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"\"chat\":{\"id\":-\?[0-9]\+" | grep -om1 "\-\?[0-9]\+"
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}
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# makes decoding emojis possible, important for sending them too
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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}${remain}"
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}
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gettext() {
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local text="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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'{\?\("text"\|"caption"\):"\(\\"\|[^"]*\)*"\(,\|}\)' | grep -v "^{" | tail -n1)"
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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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local user_name="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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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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local username="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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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 "${username:12:-17}"\
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|| {
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grep "},\"chat\"$" <<< "${username}" >/dev/null && utf-16-surrogate-pair-decode "${username:12:-9}"
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}
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}
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getchat_title(){
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local chat_title="$(tail -n 1 "${bot_tmpdir}${1}" | grep -om1\
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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 "${1}"
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}
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getcbk_data() {
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local callbacks="$(tail -n 1 "${bot_tmpdir}${1}"\
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| grep "\"callback_query\"" | grep -om1 '"data":"\(\\"\|[^"]*\)*"}')"
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[ ! -z "${callbacks}" ] && utf-16-surrogate-pair-decode "${callbacks:8:-2}"
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}
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gettimestamp() {
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local timestamp="$(tail -n 1 "${bot_tmpdir}${1}"\
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| grep "\"date\"" | grep -om1 "\"date\":[0-9]\+,")"
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[ ! -z "${timestamp}" ] && date "+%D %H:%M" -d "@${timestamp:7:-1}"
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}
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# $1 is name of a bash array with the number of columns in every row such as ( 1 1 3 ) for a 3 row keyboard in which the first and second row have 1 column, and the third has 3
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# $2 is name of a bash array with as many text entries as there are columns, they are added left to right, up to down, to the rows/columns configuration passed as first arg
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# $3 is name of a bash array with as many data entries as there are columns, they are added left to right, up to down, to the rows/columns configuration passed as first arg
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mkinline_kbd(){
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local -n rows="${1}"
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local -n text="${2}"
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local -n data="${3}"
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local kbd="{\"inline_keyboard\":[]}"
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local unit="\"text\":\"\",\"callback_data\":\"\""
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local rowformat="[]"
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local colformat="{}"
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local rowfirstpass=1
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local colfirstpass=1
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for (( i=0; i<"${#rows[@]}"; i++ )); do
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[ "${rowfirstpass}" -eq 1 ] && {
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kbd="$(sed "s/]}$/${rowformat}]}/" <<< "${kbd}")"
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rowfirstpass=0
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} || kbd="$(sed "s/]}$/,${rowformat}]}/" <<< "${kbd}")"
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for (( j=0; j<"${rows[${i}]}"; j++)); do
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[ "${colfirstpass}" -eq 1 ] && {
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kbd="$(sed "s/]]}$/${colformat}]]}/" <<< "${kbd}")"
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colfirstpass=0
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} || kbd="$(sed "s/]]}$/,${colformat}]]}/" <<< "${kbd}")"
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kbd="$(sed "s/}]]}$/${unit}}]]}/" <<< "${kbd}")"
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done
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colfirstpass=1
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done
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for i in "${text[@]}"; do
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kbd="$(sed "s/\"text\":\"\"/\"text\":\"${i}\"/" <<< "${kbd}")"
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done
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for i in "${data[@]}"; do
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kbd="$(sed "s/\"callback_data\":\"\"/\"callback_data\":\"${i}\"/" <<< "${kbd}")"
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done
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sed "s/ /+/g;:a;N;$!ba;s/\n/%0A/g" <<< "${kbd}"
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}
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# $1 is target chat_id
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# $2 is text
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# $3 is inline keyboard (optional)
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sendmsg() {
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local sentmsg
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[ -z "${3}" ] && sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${1}" \
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-d "text=${2}")" \
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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=${3}")"
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sentmsg="$(sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g' <<< "${sentmsg}")"
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[ ! -z "${sentmsg}" ] && printf "%s\n" "${sentmsg}" >> "${bot_tmpdir}sentmsgs.txt"
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}
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# $1 is target chat_id
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# $2 is target msg_id
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# $3 is text
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# $4 is inline keyboard (optional)
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replymsg() {
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local sentmsg
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[ -z "${4}" ] &&\
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sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${1}" -d "reply_to_message_id=${2}"\
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-d "text=${3}")" ||
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sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${1}" -d "reply_to_message_id=${2}"\
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-d "text=${3}" -d "reply_markup=${4}")"
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sentmsg="$(sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g' <<< "${sentmsg}")"
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[ ! -z "${sentmsg}" ] && printf "%s\n" "${sentmsg}" >> "${bot_tmpdir}sentmsgs.txt"
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}
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# $1 is target chat_id
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# $2 is target msg_id
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# $3 is text
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# $4 is inline keyboard (optional)
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editmsg() {
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local editmsg
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[ -z "${4}" ] && editmsg="$(curl -sX GET "${api_url}editMessageText" -d "chat_id=${1}" -d "message_id=${2}" \
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-d "text=${3}")" || editmsg="$(curl -sX GET "${api_url}editMessageText" -d "chat_id=${1}" -d "message_id=${2}" \
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-d "text=${3}" -d "reply_markup=${4}")"
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editmsg="$(sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g' <<< "${editmsg}")"
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[ ! -z "${editmsg}" ] && printf "%s\n" "${editmsg}" >> "${bot_tmpdir}sentmsgs.txt"
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}
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# $1 is target chat_id
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# $2 is target msg_id
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delmsg() {
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local delmsg
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delmsg="$(curl -sX GET "${api_url}deleteMessage" -d "chat_id=${1}"\
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-d "message_id=${2}")"
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[ ! -z "${delmsg}" ] && printf "deleted message %s from chat %s\n" "${2}" "${1}" >> "${bot_tmpdir}delmsgs.txt"
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}
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# $1 is the name of a bash associative array to be filled with the message contents
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# $2 is the filename to be passed to the getX functions
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getmsg_content(){
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local -n _REF="${1}"
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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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_REF[callback]="$(getcbk_data "${2}")"
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_REF[timestamp]="$(gettimestamp "${2}")"
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}
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