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