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#!rsc by RouterOS
# RouterOS script: telegram-chat
# Copyright (c) 2023-2024 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# requires RouterOS, version=7.13
#
# use Telegram to chat with your Router and send commands
# https://git.eworm.de/cgit/routeros-scripts/about/doc/telegram-chat.md
:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:do {
:local ScriptName [ :jobname ];
:global Identity;
:global TelegramChatActive;
:global TelegramChatGroups;
:global TelegramChatId;
:global TelegramChatIdsTrusted;
:global TelegramChatOffset;
:global TelegramChatRunTime;
:global TelegramMessageIDs;
:global TelegramRandomDelay;
:global TelegramTokenId;
:global CertificateAvailable;
:global EitherOr;
:global EscapeForRegEx;
:global GetRandom20CharAlNum;
:global IfThenElse;
:global LogPrint;
:global MAX;
:global MIN;
:global MkDir;
:global RandomDelay;
:global ScriptLock;
:global SendTelegram2;
:global SymbolForNotification;
:global ValidateSyntax;
:global WaitForFile;
:global WaitFullyConnected;
:if ([ $ScriptLock $ScriptName ] = false) do={
:error false;
}
$WaitFullyConnected;
:if ([ :typeof $TelegramChatOffset ] != "array") do={
:set TelegramChatOffset { 0; 0; 0 };
}
:if ([ :typeof $TelegramRandomDelay ] != "num") do={
:set TelegramRandomDelay 0;
}
:if ([ $CertificateAvailable "Go Daddy Secure Certificate Authority - G2" ] = false) do={
$LogPrint warning $ScriptName ("Downloading required certificate failed.");
:error false;
}
$RandomDelay $TelegramRandomDelay;
:local Data false;
:for I from=1 to=4 do={
:if ($Data = false) do={
:do {
:set Data ([ /tool/fetch check-certificate=yes-without-crl output=user \
("https://api.telegram.org/bot" . $TelegramTokenId . "/getUpdates?offset=" . \
$TelegramChatOffset->0 . "&allowed_updates=%5B%22message%22%5D") as-value ]->"data");
:set TelegramRandomDelay [ $MAX 0 ($TelegramRandomDelay - 1) ];
} on-error={
:if ($I < 4) do={
$LogPrint debug $ScriptName ("Fetch failed, " . $I . ". try.");
:set TelegramRandomDelay [ $MIN 15 ($TelegramRandomDelay + 5) ];
:delay (($I * $I) . "s");
}
}
}
}
:if ($Data = false) do={
$LogPrint warning $ScriptName ("Failed getting updates.");
:error false;
}
:local JSON [ :deserialize from=json value=$Data ];
:local UpdateID 0;
:local Uptime [ /system/resource/get uptime ];
:foreach Update in=($JSON->"result") do={
:set UpdateID ($Update->"update_id");
:local Message ($Update->"message");
:local IsReply [ :len ($Message->"reply_to_message") ];
:local IsMyReply ($TelegramMessageIDs->[ :tostr ($Message->"reply_to_message"->"message_id") ]);
:if (($IsMyReply = 1 || $TelegramChatOffset->0 > 0 || $Uptime > 5m) && $UpdateID >= $TelegramChatOffset->2) do={
:local Trusted false;
:local Chat ($Message->"chat");
:local From ($Message->"from");
:local Command [ :tostr ($Message->"text") ];
:foreach IdsTrusted in=($TelegramChatId, $TelegramChatIdsTrusted) do={
:if ($From->"id" = $IdsTrusted || $From->"username" = $IdsTrusted) do={
:set Trusted true;
}
}
:if ($Trusted = true) do={
:local Done false;
:if ($Command = "?") do={
$LogPrint info $ScriptName ("Sending notice for update " . $UpdateID . ".");
$SendTelegram2 ({ origin=$ScriptName; chatid=($Chat->"id"); silent=true; replyto=($Message->"message_id"); \
subject=([ $SymbolForNotification "speech-balloon" ] . "Telegram Chat"); \
message=("Online" . [ $IfThenElse $TelegramChatActive " (and active!)" ] . ", awaiting your commands!") });
:set Done true;
}
:if ($Done = false && [ :pick ($Command) 0 1 ] = "!") do={
:if ($Command ~ ("^! *(" . [ $EscapeForRegEx $Identity ] . "|@" . $TelegramChatGroups . ")\$")) do={
:set TelegramChatActive true;
} else={
:set TelegramChatActive false;
}
$LogPrint info $ScriptName ("Now " . [ $IfThenElse $TelegramChatActive "active" "passive" ] . \
" from update " . $UpdateID . "!");
:set Done true;
}
:if ($Done = false && ($IsMyReply = 1 || ($IsReply = 0 && $TelegramChatActive = true)) && [ :len ($Command) ] > 0) do={
:if ([ $ValidateSyntax ($Command) ] = true) do={
:local State "";
:local File ("tmpfs/telegram-chat/" . [ $GetRandom20CharAlNum 6 ]);
:if ([ $MkDir "tmpfs/telegram-chat" ] = false) do={
$LogPrint error $ScriptName ("Failed creating directory!");
:error false;
}
$LogPrint info $ScriptName ("Running command from update " . $UpdateID . ": " . $Command);
:execute script=(":do {\n" . $Command . "\n} on-error={ /file/add name=\"" . $File . ".failed\" };" . \
"/file/add name=\"" . $File . ".done\"") file=($File . "\00");
:if ([ $WaitForFile ($File . ".done") [ $EitherOr $TelegramChatRunTime 20s ] ] = false) do={
:set State ([ $SymbolForNotification "warning-sign" ] . "The command did not finish, still running in background.\n\n");
}
:if ([ :len [ /file/find where name=($File . ".failed") ] ] > 0) do={
:set State ([ $SymbolForNotification "cross-mark" ] . "The command failed with an error!\n\n");
}
:local Content ([ /file/read chunk-size=32768 file=$File as-value ]->"data");
$SendTelegram2 ({ origin=$ScriptName; chatid=($Chat->"id"); silent=true; replyto=($Message->"message_id"); \
subject=([ $SymbolForNotification "speech-balloon" ] . "Telegram Chat"); \
message=([ $SymbolForNotification "gear" ] . "Command:\n" . $Command . "\n\n" . \
$State . [ $IfThenElse ([ :len $Content ] > 0) \
([ $SymbolForNotification "memo" ] . "Output:\n" . $Content) \
([ $SymbolForNotification "memo" ] . "No output.") ]) });
/file/remove "tmpfs/telegram-chat";
} else={
$LogPrint info $ScriptName ("The command from update " . $UpdateID . " failed syntax validation!");
$SendTelegram2 ({ origin=$ScriptName; chatid=($Chat->"id"); silent=false; replyto=($Message->"message_id"); \
subject=([ $SymbolForNotification "speech-balloon" ] . "Telegram Chat"); \
message=([ $SymbolForNotification "gear" ] . "Command:\n" . $Command . "\n\n" . \
[ $SymbolForNotification "cross-mark" ] . "The command failed syntax validation!") });
}
}
} else={
:local MessageText ("Received a message from untrusted contact " . \
[ $IfThenElse ([ :len ($From->"username") ] = 0) "without username" ("'" . $From->"username" . "'") ] . \
" (ID " . $From->"id" . ") in update " . $UpdateID . "!");
:if ($Command ~ ("^! *" . [ $EscapeForRegEx $Identity ] . "\$")) do={
$LogPrint warning $ScriptName $MessageText;
$SendTelegram2 ({ origin=$ScriptName; chatid=($Chat->"id"); silent=false; replyto=($Message->"message_id"); \
subject=([ $SymbolForNotification "speech-balloon" ] . "Telegram Chat"); \
message=("You are not trusted.") });
} else={
$LogPrint info $ScriptName $MessageText;
}
}
} else={
$LogPrint debug $ScriptName ("Already handled update " . $UpdateID . ".");
}
}
:set TelegramChatOffset ([ :pick $TelegramChatOffset 1 3 ], \
[ $IfThenElse ($UpdateID >= $TelegramChatOffset->2) ($UpdateID + 1) ($TelegramChatOffset->2) ]);
} on-error={ }
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