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#!rsc
# RouterOS script: script-updates
# Copyright (c) 2013-2019 Christian Hesse <mail@eworm.de>
#
# update installed scripts from file or url

:global ExpectedConfigVersion;
:global GlobalConfigVersion;
:global Identity;
:global IDonate;
:global SentConfigChangesNotification;
:global ScriptUpdatesFetch;
:global ScriptUpdatesBaseUrl;
:global ScriptUpdatesUrlSuffix;
:global ScriptUpdatesIgnore;
:global ScriptUpdatesConfigChangesIgnore;

:global SendNotification;

:foreach Script in=[ / system script find ] do={
  :local Ignore 0;
  :local ScriptVal [ / system script get $Script ];
  :local ScriptFile [ / file find where name=("script-updates/" . $ScriptVal->"name") ];
  :local SourceNew;
  :if ([ :len $ScriptFile ] > 0) do={
    :set SourceNew [ / file get $ScriptFile content ];
    / file remove $ScriptFile;
  }

  :foreach Scheduler in=[ / system scheduler find where on-event~("\\b" . $ScriptVal->"name" . "\\b") ] do={
    :local SchedulerVal [ / system scheduler get $Scheduler ];
    :if ($ScriptVal->"policy" != $SchedulerVal->"policy") do={
      :log warning ("Policies differ for script " . $ScriptVal->"name" . \
        " and its scheduler " . $SchedulerVal->"name" . "!");
    }
  }

  :if ([ :len $SourceNew ] = 0 && $ScriptUpdatesFetch = true) do={
    :foreach IgnoreLoop in=$ScriptUpdatesIgnore do={
      :if ($IgnoreLoop = $ScriptVal->"name") do={ :set Ignore 1; }
    }

    :if ($Ignore = 0) do={
      :log debug ("Fetching script from url: " . $ScriptVal->"name");
      :do {
        :local Result [ / tool fetch check-certificate=yes-without-crl \
            ($ScriptUpdatesBaseUrl . $ScriptVal->"name" . $ScriptUpdatesUrlSuffix) \
            output=user as-value ];
        :if ($Result->"status" = "finished") do={
          :set SourceNew ($Result->"data");
        }
      } on-error={
        :log info ("Failed fetching " . $ScriptVal->"name");
      }
    }
  }

  :if ([ :len $SourceNew ] > 0) do={
    :if ([ :pick $SourceNew 0 5 ] = "#!rsc") do={
      :if ($SourceNew != $ScriptVal->"source") do={
        :local DontRequirePermissions \
            ($SourceNew~"\n# requires: dont-require-permissions=yes\n");
        :log info ("Updating script: " . $ScriptVal->"name");
        / system script set owner=($ScriptVal->"name") source=$SourceNew \
            dont-require-permissions=$DontRequirePermissions $Script;
        :if ($ScriptVal->"name" = "global-config" && \
             [ / system script print count-only where name="global-config-overlay" ] > 0) do={
          / system script { run global-config; run global-config-overlay; }
        }
        :if ($ScriptVal->"name" = "global-functions") do={
          / system script run global-functions;
        }
      } else={
        :log debug ("Script " .  $ScriptVal->"name" . " did not change.");
      }
    } else={
      :log warning ("Looks like new script " . $ScriptVal->"name" . " is not valid. Ignoring!");
    }
  } else={
    :log debug ("No update for script " . $ScriptVal->"name" . ".");
  }
}

:if ($ScriptUpdatesConfigChangesIgnore!=true && \
     $SentConfigChangesNotification!=$ExpectedConfigVersion && \
     $GlobalConfigVersion < $ExpectedConfigVersion) do={
  :global GlobalConfigChanges;
  :local ChangeLogCode;
  :local ConfigScript "global-config";
  :if ([ /system script print count-only where name="global-config-overlay" ] > 0) do={
    :set ConfigScript "global-config-overlay";
  }
  :local NotificationMessage ("Current configuration on " . $Identity . \
      " is out of date. Please update " . $ConfigScript . ", then increase " . \
      "variable GlobalConfigVersion (currently " . $GlobalConfigVersion . \
      ") to " . $ExpectedConfigVersion . " and re-run " . $ConfigScript . ".");

  :log debug ("Fetching changelog.");
  :do {
    :local Result [ / tool fetch check-certificate=yes-without-crl \
        ($ScriptUpdatesBaseUrl . "global-config.changes" . $ScriptUpdatesUrlSuffix) \
        output=user as-value ];
    :if ($Result->"status" = "finished") do={
      :set ChangeLogCode ($Result->"data");
    }
    :set NotificationMessage ($NotificationMessage . "\n\nChanges:");
    [ :parse $ChangeLogCode ];
    :for I from=($GlobalConfigVersion + 1) to=$ExpectedConfigVersion do={
      :set NotificationMessage ($NotificationMessage . \
          "\n * " . $GlobalConfigChanges->[ :tostr $I ]);
    }
    :set GlobalConfigChanges;
  } on-error={
    :log info ("Failed fetching changes!");
    :set NotificationMessage ($NotificationMessage . \
        "\n\nChanges are not available.");
  }

  :if ($IDonate != true) do={
    :set NotificationMessage ($NotificationMessage . \
      "\n\n==== donation hint ====\n" . \
      "This project is developed in private spare time and usage is " . \
      "free of charge for you. If you like the scripts and think this is " . \
      "of value for you or your business please consider a donation:\n" . \
      "https://git.eworm.de/cgit/routeros-scripts/about/#donate");
  }

  $SendNotification "Configuration warning!" $NotificationMessage;
  :set SentConfigChangesNotification $ExpectedConfigVersion;
}