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#!/usr/bonsaitools/bin/perl -w
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): Gervase Markham <gerv@gerv.net>
#
# Generates mostfreq list from data collected by collectstats.pl.


use diagnostics;
use strict;
use CGI "param";
use AnyDBM_File;
require "globals.pl";
require "CGI.pl";

ConnectToDatabase(1);
GetVersionTable();

my %dbmcount;
my %count;
my $dobefore = 0;
my $before = "";
my %before;

# Get params from URL

my $changedsince = 7;     # default one week
my $maxrows = 100;        # arbitrary limit on max number of rows
my $sortby = "dup_count"; # default to sorting by dup count

if (defined(param("sortby")))
{
  $sortby = param("sortby");
}

# Check for changedsince param, and see if it's a positive integer
if (defined(param("changedsince")) && param("changedsince") =~ /^\d{1,4}$/) 
{
  $changedsince = param("changedsince");
}

# check for max rows param, and see if it's a positive integer
if (defined(param("maxrows")) && param("maxrows") =~ /^\d{1,4}$/)
{
  $maxrows = param("maxrows");
}

# Start the page
print "Content-type: text/html\n";
print "\n";
PutHeader("Most Frequently Reported Bugs");

# Open today's record of dupes
my $today = &days_ago(0);

if (<data/duplicates/dupes$today*>)
{
  dbmopen(%dbmcount, "data/duplicates/dupes$today", 0644) || 
                            &die_politely("Can't open today's dupes file: $!");
}
else
{
  # Try yesterday's, then (in case today's hasn't been created yet)
  $today = &days_ago(1);
  if (<data/duplicates/dupes$today*>)
  {
    dbmopen(%dbmcount, "data/duplicates/dupes$today", 0644) || 
                        &die_politely("Can't open yesterday's dupes file: $!");
  }
  else
  {
    &die_politely("There are no duplicate statistics for today or yesterday.");
  }
}

# Copy hash (so we don't mess up the on-disk file when we remove entries)
%count = %dbmcount;
my $key;
my $value;
my $threshold = Param("mostfreqthreshold");

# Remove all those dupes under the threshold (for performance reasons)
while (($key, $value) = each %count)
{
  if ($value < $threshold)
  {
    delete $count{$key};
  } 
}

# Try and open the database from "changedsince" days ago
$before = &days_ago($changedsince);    

if (<data/duplicates/dupes$before*>) 
{
  dbmopen(%before, "data/duplicates/dupes$before", 0644) && ($dobefore = 1);
}

print Param("mostfreqhtml");

print "
<table BORDER>
<tr BGCOLOR=\"#CCCCCC\">

<td><center><b>
<a href=\"duplicates.cgi?sortby=bug_no&maxrows=$maxrows&changedsince=$changedsince\">Bug #</a>
</b></center></td>
<td><center><b>
<a href=\"duplicates.cgi?sortby=dup_count&maxrows=$maxrows&changedsince=$changedsince\">Dupe<br>Count</a>
</b></center></td>\n";

my %delta;

if ($dobefore) 
{
  print "<td><center><b>
  <a href=\"duplicates.cgi?sortby=delta&maxrows=$maxrows&changedsince=$changedsince\">Change in
  last<br>$changedsince day(s)</a></b></center></td>";

  # Calculate the deltas if we are doing a "before"
  foreach (keys(%count))
  {
    $delta{$_} = $count{$_} - $before{$_};
  }
}

print "
<td><center><b>Component</b></center></td>
<td><center><b>Severity</b></center></td>
<td><center><b>Op Sys</b></center></td>
<td><center><b>Target<br>Milestone</b></center></td>
<td><center><b>Summary</b></center></td>
</tr>\n\n";

# Sort, if required
my @sortedcount;

if    ($sortby eq "delta")
{
  @sortedcount = sort by_delta keys(%count);
}
elsif ($sortby eq "bug_no")
{
  @sortedcount = sort by_bug_no keys(%count);
}
elsif ($sortby eq "dup_count")
{
  @sortedcount = sort by_dup_count keys(%count);
}

my $i = 0;

foreach (@sortedcount)
{
  my $id = $_;
  SendSQL("SELECT component, bug_severity, op_sys, target_milestone, short_desc, groupset " .
                 " FROM bugs WHERE bug_id = $id");
  my ($component, $severity, $op_sys, $milestone, $summary, $groupset) = FetchSQLData();
        next unless $groupset == 0;
        $summary = html_quote($summary);
  print "<tr>";
  print '<td><center><A HREF="show_bug.cgi?id=' . $id . '">';
  print $id . "</A></center></td>";
  print "<td><center>$count{$id}</center></td>";
  if ($dobefore) 
  {
    print "<td><center>$delta{$id}</center></td>";
  }
  print "<td>$component</td>\n    ";
  print "<td><center>$severity</center></td>";
  print "<td><center>$op_sys</center></td>";
  print "<td><center>$milestone</center></td>";
  print "<td>$summary</td>";
  print "</tr>\n";
  
  $i++;
  if ($i == $maxrows)
  {
    last;
  }
}

print "</table><br><br>";
PutFooter();


sub by_bug_no 
{
  return ($a <=> $b);
}

sub by_dup_count 
{
  return -($count{$a} <=> $count{$b});
}

sub by_delta 
{
  return -($delta{$a} <=> $delta{$b});
}

sub days_ago 
{
  my ($dom, $mon, $year) = (localtime(time - ($_[0]*24*60*60)))[3, 4, 5];
  return sprintf "%04d-%02d-%02d", 1900 + $year, ++$mon, $dom;
}

sub die_politely {
  my $msg = shift;

  print <<FIN;
<p>
<table border=1 cellpadding=10>
<tr>
<td align=center>
<font color=blue>$msg</font>
</td>
</tr>
</table>
<p>
FIN
    
  PutFooter();
  exit;
}