#!/usr/bin/perl

#############################################################################
# $Id$
#############################################################################
# Log: CloudFlare updater script (cfddns)
# Revision 2.0  2021/05/08
# Written by Asif Bacchus
#############################################################################


use strict;

### Get Logwatch detail level
my $detailLevel = $ENV{'LOGWATCH_DETAIL_LEVEL'} || 0;


### Declare variables
my $summaryErr;
my $summaryFailedUpdate;
my $summaryInvalidHost;
my $summaryUpdated;
my $summaryUpToDate;

my %reportHash = ();
my $key;


### Minimal detail level: provide summary data only
if ($detailLevel == 0) {
    ### process logfile and summarize message types
    while (defined(my $ThisLine = <STDIN>)) {
        if ($ThisLine =~ /ERROR: Unable to update IP address/) {
            $summaryFailedUpdate++;
        }
        elsif ($ThisLine =~ /ERROR: /) {
            $summaryErr++;
        }
        elsif ($ThisLine =~ /WARNING: Cannot find existing record/) {
            $summaryInvalidHost++;
        }
        elsif ($ThisLine =~ /SUCCESS: /) {
            $summaryUpdated++;
        }
        elsif ($ThisLine =~ /already up-to-date/) {
            $summaryUpToDate++;
        }
    }

    ### fill hash table with headings and summary counts
    if ($summaryUpdated > 0) {
        $reportHash{"Entries successfully updated"} = $summaryUpdated;
    }
    if ($summaryUpToDate > 0) {
        $reportHash{"Entries already up-to-date"} = $summaryUpToDate;
    }
    if ($summaryInvalidHost > 0) {
        $reportHash{"Undefined hosts"} = $summaryInvalidHost;
    }
    if ($summaryFailedUpdate > 0) {
        $reportHash{"Hosts failed to update"} = $summaryFailedUpdate;
    }
    if ($summaryErr > 0) {
        $reportHash{"Other errors"} = $summaryErr;
    }

    ### print hash table
    foreach $key (sort keys %reportHash) {
        print "$key: $reportHash{$key}\n";
    }
}
### Levels 1-4 provide the actual error, status and success messages instead of
### a summary count
elsif ($detailLevel >= 1 && $detailLevel <= 4) {
    while (defined(my $ThisLine = <STDIN>)) {
        if ($ThisLine =~ /ERROR: /) {
            print $ThisLine;
        }
        elsif ($ThisLine =~ /WARNING: Cannot find existing/) {
            print $ThisLine;
        }
        elsif ($ThisLine =~ /SUCCESS: /) {
            print $ThisLine;
        }
    }
}
### Any level 5 or above will echo the entire log. The log itself is purposefully terse
### so while this level of detail is likely rarely needed, it is still not an overwhelming
### level of detail.
### Generally, however, using this level of detail should only be done if you cannot view
### the actual log file directly for whatever reason. The actual log file is colour-coded
### for easier debugging.
elsif ($detailLevel > 5) {
    while (defined(my $ThisLine = <STDIN>)) {
        print $ThisLine;
    }
}



### Exit gracefully
exit (0);

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