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#!rsc by RouterOS
# RouterOS script: telegram-chat
# Copyright (c) 2023 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# use Telegram to chat with your Router and send commands
# https://git.eworm.de/cgit/routeros-scripts/about/doc/telegram-chat.md
:local 0 "telegram-chat";
:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global Identity;
:global TelegramChatActive;
:global TelegramChatGroups;
:global TelegramChatId;
:global TelegramChatIdsTrusted;
:global TelegramChatOffset;
:global TelegramTokenId;
:global CertificateAvailable;
:global EscapeForRegEx;
:global GetRandom20CharAlNum;
:global IfThenElse;
:global LogPrintExit2;
:global MkDir;
:global ScriptLock;
:global SendTelegram2;
:global SymbolForNotification;
:global ValidateSyntax;
:global WaitForFile;
:global WaitFullyConnected;
$ScriptLock $0;
$WaitFullyConnected;
:if ([ :typeof $TelegramChatOffset ] != "num") do={
:set TelegramChatOffset 0;
}
:if ([ $CertificateAvailable "Go Daddy Secure Certificate Authority - G2" ] = false) do={
$LogPrintExit2 warning $0 ("Downloading required certificate failed.") true;
}
:local JsonGetKey do={
:local Array [ :toarray $1 ];
:local Key [ :tostr $2 ];
:for I from=0 to=([ :len $Array ] - 1) do={
:if (($Array->$I) = $Key) do={
:if ($Array->($I + 1) = ":") do={
:return ($Array->($I + 2));
}
:return [ :pick ($Array->($I + 1)) 1 [ :len ($Array->($I + 1)) ] ];
}
}
:return false;
}
:local Data;
:do {
:set Data ([ /tool/fetch check-certificate=yes-without-crl output=user \
("https://api.telegram.org/bot" . $TelegramTokenId . "/getUpdates?offset=" . \
$TelegramChatOffset . "&allowed_updates=%5B%22message%22%5D") as-value ]->"data");
:set Data [ :pick $Data ([ :find $Data "[" ] + 1) ([ :len $Data ] - 2) ];
} on-error={
$LogPrintExit2 info $0 ("Failed getting updates from Telegram.") true;
}
:foreach Update in=[ :toarray $Data ] do={
:local UpdateID [ $JsonGetKey $Update "update_id" ];
:if ($UpdateID >= $TelegramChatOffset) do={
:set TelegramChatOffset ($UpdateID + 1);
:local Trusted false;
:local Message [ $JsonGetKey $Update "message" ];
:local From [ $JsonGetKey $Message "from" ];
:local FromID [ $JsonGetKey $From "id" ];
:local FromUserName [ $JsonGetKey $From "username" ];
:foreach IdsTrusted in=($TelegramChatId, $TelegramChatIdsTrusted) do={
:if ($FromID = $IdsTrusted || $FromUserName = $IdsTrusted) do={
:set Trusted true;
}
}
:if ($Trusted = true) do={
:local Text [ $JsonGetKey $Message "text" ];
:if ([ :pick $Text 0 1 ] = "!") do={
:if ($Text ~ ("^! *(" . [ $EscapeForRegEx $Identity ] . "|@" . $TelegramChatGroups . ")\$")) do={
:set TelegramChatActive true;
} else={
:set TelegramChatActive false;
}
$LogPrintExit2 info $0 ("Now " . [ $IfThenElse $TelegramChatActive "active" "passive" ] . "!") false;
} else={
:if ($TelegramChatActive = true && [ :len $Text ] > 0) do={
:if ([ $ValidateSyntax $Text ] = true) do={
:local File ("tmpfs/telegram-chat/" . [ $GetRandom20CharAlNum 6 ]);
$MkDir "tmpfs/telegram-chat";
$LogPrintExit2 info $0 ("Running command: " . $Text) false;
:exec script=($Text . "; :execute script=\":put\" file=" . $File . ".done") file=$File;
:if ([ $WaitForFile ($File . ".done.txt") 200 ] = false) do={
$LogPrintExit2 warning $0 ("Command did not finish, possibly still running.") false;
}
:local Content [ /file/get ($File . ".txt") content ];
$SendTelegram2 ({ origin=$0; silent=false; \
subject=([ $SymbolForNotification "speech-balloon" ] . "Telegram Chat"); \
message=("Command:\n" . $Text . "\n\nOutput:\n" . $Content) });
/file/remove "tmpfs/telegram-chat";
} else={
$LogPrintExit2 warning $0 ("The command failed syntax validation: " . $Text) false;
}
}
}
} else={
$LogPrintExit2 warning $0 ("Received a message from untrusted contact '" . $FromUserName . "' (ID " . $FromID . ")!") false;
}
}
}
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