#!/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): Terry Weissman <terry@mozilla.org>
#                 Dan Mosedale <dmose@mozilla.org>

use diagnostics;
use strict;

require "CGI.pl";

# Shut up misguided -w warnings about "used only once":

use vars %::versions,
    %::components,
    %::COOKIE;

confirm_login();

print "Content-type: text/html\n\n";

PutHeader ("Bug processed");

GetVersionTable();

if ( Param("strictvaluechecks") ) {
    CheckFormFieldDefined(\%::FORM, 'product');
    CheckFormFieldDefined(\%::FORM, 'version');
    CheckFormFieldDefined(\%::FORM, 'component');
}

if ($::FORM{'product'} ne $::dontchange) {
    if ( Param("strictvaluechecks") ) {
        CheckFormField(\%::FORM, 'product', \@::legal_product);
    }
    my $prod = $::FORM{'product'};

    # note that when this script is called from buglist.cgi (rather
    # than show_bug.cgi), it's possible that the product will be changed
    # but that the version and/or component will be set to 
    # "--dont_change--" but still happen to be correct.  in this case,
    # the if statement will incorrectly trigger anyway.  this is a 
    # pretty weird case, and not terribly unreasonable behavior, but 
    # worthy of a comment, perhaps.
    #
    my $vok = lsearch($::versions{$prod}, $::FORM{'version'}) >= 0;
    my $cok = lsearch($::components{$prod}, $::FORM{'component'}) >= 0;
    if (!$vok || !$cok) {
        print "<H1>Changing product means changing version and component.</H1>\n";
        print "You have chosen a new product, and now the version and/or\n";
        print "component fields are not correct.  (Or, possibly, the bug did\n";
        print "not have a valid component or version field in the first place.)\n";
        print "Anyway, please set the version and component now.<p>\n";
        print "<form>\n";
        print "<table>\n";
        print "<tr>\n";
        print "<td align=right><b>Product:</b></td>\n";
        print "<td>$prod</td>\n";
        print "</tr><tr>\n";
        print "<td align=right><b>Version:</b></td>\n";
        print "<td>" . Version_element($::FORM{'version'}, $prod) . "</td>\n";
        print "</tr><tr>\n";
        print "<td align=right><b>Component:</b></td>\n";
        print "<td>" . Component_element($::FORM{'component'}, $prod) . "</td>\n";
        print "</tr>\n";
        print "</table>\n";
        foreach my $i (keys %::FORM) {
            if ($i ne 'version' && $i ne 'component') {
                print "<input type=hidden name=$i value=\"" .
                value_quote($::FORM{$i}) . "\">\n";
            }
        }
        print "<input type=submit value=Commit>\n";
        print "</form>\n";
        print "</hr>\n";
        print "<a href=query.cgi>Cancel all this and go to the query page.</a>\n";
        exit;
    }
}


my @idlist;
if (defined $::FORM{'id'}) {

    # since this means that we were called from show_bug.cgi, now is a good
    # time to do a whole bunch of error checking that can't easily happen when
    # we've been called from buglist.cgi, because buglist.cgi only tweaks
    # values that have been changed instead of submitting all the new values.
    # (XXX those error checks need to happen too, but implementing them 
    # is more work in the current architecture of this script...)
    #
    if ( Param('strictvaluechecks') ) { 
        CheckFormField(\%::FORM, 'rep_platform', \@::legal_platform);
        CheckFormField(\%::FORM, 'priority', \@::legal_priority);
        CheckFormField(\%::FORM, 'bug_severity', \@::legal_severity);
        CheckFormField(\%::FORM, 'component', 
                       \@{$::components{$::FORM{'product'}}});
        CheckFormFieldDefined(\%::FORM, 'bug_file_loc');
        CheckFormFieldDefined(\%::FORM, 'short_desc');
        CheckFormField(\%::FORM, 'product', \@::legal_product);
        CheckFormField(\%::FORM, 'version', 
                       \@{$::versions{$::FORM{'product'}}});
        CheckFormField(\%::FORM, 'op_sys', \@::legal_opsys);
        CheckFormFieldDefined(\%::FORM, 'longdesclength');
        CheckPosInt($::FORM{'id'});
    }
    push @idlist, $::FORM{'id'};
} else {
    foreach my $i (keys %::FORM) {
        if ($i =~ /^id_/) {
            if ( Param('strictvaluechecks') ) { 
                CheckPosInt(substr($i, 3));
            }
            push @idlist, substr($i, 3);
        }
    }
}

if (!defined $::FORM{'who'}) {
    $::FORM{'who'} = $::COOKIE{'Bugzilla_login'};
}

# the common updates to all bugs in @idlist start here
#
print "<TITLE>Update Bug " . join(" ", @idlist) . "</TITLE>\n";
if (defined $::FORM{'id'}) {
    navigation_header();
}
print "<HR>\n";
$::query = "update bugs\nset";
$::comma = "";
umask(0);

sub DoComma {
    $::query .= "$::comma\n    ";
    $::comma = ",";
}

sub ChangeStatus {
    my ($str) = (@_);
    if ($str ne $::dontchange) {
        DoComma();
        $::query .= "bug_status = '$str'";
    }
}

sub ChangeResolution {
    my ($str) = (@_);
    if ($str ne $::dontchange) {
        DoComma();
        $::query .= "resolution = '$str'";
    }
}


my $foundbit = 0;
foreach my $b (grep(/^bit-\d*$/, keys %::FORM)) {
    if (!$foundbit) {
        $foundbit = 1;
        DoComma();
        $::query .= "groupset = 0";
    }
    if ($::FORM{$b}) {
        my $v = substr($b, 4);
        $::query .= "+ $v";     # Carefully written so that the math is
                                # done by MySQL, which can handle 64-bit math,
                                # and not by Perl, which I *think* can not.
    }
}

foreach my $field ("rep_platform", "priority", "bug_severity",          
                   "summary", "component", "bug_file_loc", "short_desc",
                   "product", "version", "op_sys",
                   "target_milestone", "status_whiteboard") {
    if (defined $::FORM{$field}) {
        if ($::FORM{$field} ne $::dontchange) {
            DoComma();
            $::query .= "$field = " . SqlQuote(trim($::FORM{$field}));
        }
    }
}


if (defined $::FORM{'qa_contact'}) {
    my $name = trim($::FORM{'qa_contact'});
    if ($name ne $::dontchange) {
        my $id = 0;
        if ($name ne "") {
            $id = DBNameToIdAndCheck($name);
        }
        DoComma();
        $::query .= "qa_contact = $id";
    }
}


ConnectToDatabase();

if ( Param('strictvaluechecks') ) {
    CheckFormFieldDefined(\%::FORM, 'knob');
}
SWITCH: for ($::FORM{'knob'}) {
    /^none$/ && do {
        last SWITCH;
    };
    /^accept$/ && do {
        ChangeStatus('ASSIGNED');
        last SWITCH;
    };
    /^clearresolution$/ && do {
        ChangeResolution('');
        last SWITCH;
    };
    /^resolve$/ && do {
        ChangeStatus('RESOLVED');
        ChangeResolution($::FORM{'resolution'});
        last SWITCH;
    };
    /^reassign$/ && do {
        ChangeStatus('NEW');
        DoComma();
        if ( Param("strictvaluechecks") ) {
          if ( !defined$::FORM{'assigned_to'} ||
               trim($::FORM{'assigned_to'}) eq "") {
            print "You cannot reassign to a bug to noone.  Unless you intentionally cleared out the \"Reassign bug to\" field, ";
            print Param("browserbugmessage");
            exit 0;
          }
        }
        my $newid = DBNameToIdAndCheck($::FORM{'assigned_to'});
        $::query .= "assigned_to = $newid";
        last SWITCH;
    };
    /^reassignbycomponent$/ && do {
        if ($::FORM{'component'} eq $::dontchange) {
            print "You must specify a component whose owner should get\n";
            print "assigned these bugs.\n";
            exit 0
        }
        ChangeStatus('NEW');
        SendSQL("select initialowner from components where program=" .
                SqlQuote($::FORM{'product'}) . " and value=" .
                SqlQuote($::FORM{'component'}));
        my $newname = FetchOneColumn();
        my $newid = DBNameToIdAndCheck($newname, 1);
        DoComma();
        $::query .= "assigned_to = $newid";
        last SWITCH;
    };   
    /^reopen$/ && do {
        ChangeStatus('REOPENED');
        last SWITCH;
    };
    /^verify$/ && do {
        ChangeStatus('VERIFIED');
        last SWITCH;
    };
    /^close$/ && do {
        ChangeStatus('CLOSED');
        last SWITCH;
    };
    /^duplicate$/ && do {
        ChangeStatus('RESOLVED');
        ChangeResolution('DUPLICATE');
        if ( Param('strictvaluechecks') ) {
            CheckFormFieldDefined(\%::FORM,'dup_id');
        }
        my $num = trim($::FORM{'dup_id'});
        if ($num !~ /^[0-9]*$/) {
            print "You must specify a bug number of which this bug is a\n";
            print "duplicate.  The bug has not been changed.\n";
            exit;
        }
        if (defined($::FORM{'id'}) && $::FORM{'dup_id'} == $::FORM{'id'}) {
            print "Nice try, $::FORM{'who'}.  But it doesn't really make sense to mark a\n";
            print "bug as a duplicate of itself, does it?\n";
            exit;
        }
        AppendComment($::FORM{'dup_id'}, $::FORM{'who'}, "*** Bug $::FORM{'id'} has been marked as a duplicate of this bug. ***");
        if ( Param('strictvaluechecks') ) {
          CheckFormFieldDefined(\%::FORM,'comment');
        }
        $::FORM{'comment'} .= "\n\n*** This bug has been marked as a duplicate of $::FORM{'dup_id'} ***";

        print "<TABLE BORDER=1><TD><H2>Notation added to bug $::FORM{'dup_id'}</H2>\n";
        system("./processmail $::FORM{'dup_id'} $::FORM{'who'}");
        print "<TD><A HREF=\"show_bug.cgi?id=$::FORM{'dup_id'}\">Go To BUG# $::FORM{'dup_id'}</A></TABLE>\n";

        last SWITCH;
    };
    # default
    print "Unknown action $::FORM{'knob'}!\n";
    exit;
}


if ($#idlist < 0) {
    print "You apparently didn't choose any bugs to modify.\n";
    print "<p>Click <b>Back</b> and try again.\n";
    exit;
}

if ($::comma eq "") {
    if (!defined $::FORM{'comment'} || $::FORM{'comment'} =~ /^\s*$/) {
        print "Um, you apparently did not change anything on the selected\n";
        print "bugs. <p>Click <b>Back</b> and try again.\n";
        exit
    }
}

my $basequery = $::query;
my $delta_ts;


sub SnapShotBug {
    my ($id) = (@_);
    SendSQL("select delta_ts, " . join(',', @::log_columns) .
            " from bugs where bug_id = $id");
    my @row = FetchSQLData();
    $delta_ts = shift @row;

    return @row;
}


sub SnapShotDeps {
    my ($i, $target, $me) = (@_);
    SendSQL("select $target from dependencies where $me = $i order by $target");
    my @list;
    while (MoreSQLData()) {
        push(@list, FetchOneColumn());
    }
    return join(',', @list);
}


my $whoid = DBNameToIdAndCheck($::FORM{'who'});
my $timestamp;

sub LogDependencyActivity {
    my ($i, $oldstr, $target, $me) = (@_);
    my $newstr = SnapShotDeps($i, $target, $me);
    if ($oldstr ne $newstr) {
        SendSQL("insert into bugs_activity (bug_id,who,bug_when,field,oldvalue,newvalue) values ($i,$whoid,$timestamp,'$target','$oldstr','$newstr')");
        return 1;
    }
    return 0;
}

# this loop iterates once for each bug to be processed (eg when this script
# is called by  with multiple bugs selected from buglist.cgi instead of
# show_bug.cgi).
#
foreach my $id (@idlist) {
    my %dependencychanged;
    SendSQL("lock tables bugs write, bugs_activity write, cc write, profiles write, dependencies write, votes write");
    my @oldvalues = SnapShotBug($id);

    if (defined $::FORM{'delta_ts'} && $::FORM{'delta_ts'} ne $delta_ts) {
        print "
<H1>Mid-air collision detected!</H1>
Someone else has made changes to this bug at the same time you were trying to.
The changes made were:
<p>
";
        DumpBugActivity($id, $delta_ts);
        my $longdesc = GetLongDescription($id);
        my $longchanged = 0;

        if (length($longdesc) > $::FORM{'longdesclength'}) {
            $longchanged = 1;
            print "<P>Added text to the long description:<blockquote><pre>";
            print html_quote(substr($longdesc, $::FORM{'longdesclength'}));
            print "</pre></blockquote>\n";
        }
        SendSQL("unlock tables");
        print "You have the following choices: <ul>\n";
        $::FORM{'delta_ts'} = $delta_ts;
        print "<li><form method=post>";
        foreach my $i (keys %::FORM) {
            my $value = value_quote($::FORM{$i});
            print qq{<input type=hidden name="$i" value="$value">\n};
        }
        print qq{<input type=submit value="Submit my changes anyway">\n};
        print " This will cause all of the above changes to be overwritten";
        if ($longchanged) {
            print ", except for the changes to the description";
        }
        print qq{.</form>\n<li><a href="show_bug.cgi?id=$id">Throw away my changes, and go revisit bug $id</a></ul>\n};
        navigation_header();
        exit;
    }
        
    my %deps;
    if (defined $::FORM{'dependson'}) {
        my $me = "blocked";
        my $target = "dependson";
        for (1..2) {
            $deps{$target} = [];
            my %seen;
            foreach my $i (split('[\s,]+', $::FORM{$target})) {
                if ($i eq "") {
                    next;

                }
                SendSQL("select bug_id from bugs where bug_id = " .
                        SqlQuote($i));
                my $comp = FetchOneColumn();
                if ($comp ne $i) {
                    print "<H1>$i is not a legal bug number</H1>\n";
                    print "<p>Click <b>Back</b> and try again.\n";
                    exit;
                }
                if (!exists $seen{$i}) {
                    push(@{$deps{$target}}, $i);
                    $seen{$i} = 1;
                }
            }
            my @stack = @{$deps{$target}};
            while (@stack) {
                my $i = shift @stack;
                SendSQL("select $target from dependencies where $me = $i");
                while (MoreSQLData()) {
                    my $t = FetchOneColumn();
                    if ($t == $id) {
                        print "<H1>Dependency loop detected!</H1>\n";
                        print "The change you are making to dependencies\n";
                        print "has caused a circular dependency chain.\n";
                        print "<p>Click <b>Back</b> and try again.\n";
                        exit;
                    }
                    if (!exists $seen{$t}) {
                        push @stack, $t;
                        $seen{$t} = 1;
                    }
                }
            }
                        

            my $tmp = $me;
            $me = $target;
            $target = $tmp;
        }
    }

    my $query = "$basequery\nwhere bug_id = $id";
    
# print "<PRE>$query</PRE>\n";

    if ($::comma ne "") {
        SendSQL($query);
    }
    
    if (defined $::FORM{'comment'}) {
        AppendComment($id, $::FORM{'who'}, $::FORM{'comment'});
    }
    
    if (defined $::FORM{'cc'} && ShowCcList($id) ne $::FORM{'cc'}) {
        my %ccids;
        foreach my $person (split(/[ ,]/, $::FORM{'cc'})) {
            if ($person ne "") {
                my $cid = DBNameToIdAndCheck($person);
                $ccids{$cid} = 1;
            }
        }
        
        SendSQL("delete from cc where bug_id = $id");
        foreach my $ccid (keys %ccids) {
            SendSQL("insert into cc (bug_id, who) values ($id, $ccid)");
        }
    }

    SendSQL("select delta_ts from bugs where bug_id = $id");
    $timestamp = FetchOneColumn();

    if (defined $::FORM{'dependson'}) {
        my $me = "blocked";
        my $target = "dependson";
        for (1..2) {
            SendSQL("select $target from dependencies where $me = $id order by $target");
            my %snapshot;
            my @oldlist;
            while (MoreSQLData()) {
                push(@oldlist, FetchOneColumn());
            }
            my @newlist = sort {$a <=> $b} @{$deps{$target}};
            @dependencychanged{@oldlist} = 1;
            @dependencychanged{@newlist} = 1;

            while (0 < @oldlist || 0 < @newlist) {
                if (@oldlist == 0 || (@newlist > 0 &&
                                      $oldlist[0] > $newlist[0])) {
                    $snapshot{$newlist[0]} = SnapShotDeps($newlist[0], $me,
                                                          $target);
                    shift @newlist;
                } elsif (@newlist == 0 || (@oldlist > 0 &&
                                           $newlist[0] > $oldlist[0])) {
                    $snapshot{$oldlist[0]} = SnapShotDeps($oldlist[0], $me,
                                                          $target);
                    shift @oldlist;
                } else {
                    if ($oldlist[0] != $newlist[0]) {
                        die "Error in list comparing code";
                    }
                    shift @oldlist;
                    shift @newlist;
                }
            }
            my @keys = keys(%snapshot);
            if (@keys) {
                my $oldsnap = SnapShotDeps($id, $target, $me);
                SendSQL("delete from dependencies where $me = $id");
                foreach my $i (@{$deps{$target}}) {
                    SendSQL("insert into dependencies ($me, $target) values ($id, $i)");
                }
                foreach my $k (@keys) {
                    LogDependencyActivity($k, $snapshot{$k}, $me, $target);
                }
                LogDependencyActivity($id, $oldsnap, $target, $me);
            }

            my $tmp = $me;
            $me = $target;
            $target = $tmp;
        }
    }


    # get a snapshot of the newly set values out of the database, 
    # and then generate any necessary bug activity entries by seeing 
    # what has changed since before we wrote out the new values.
    #
    my @newvalues = SnapShotBug($id);
    foreach my $col (@::log_columns) {
        my $old = shift @oldvalues;
        my $new = shift @newvalues;
        if (!defined $old) {
            $old = "";
        }
        if (!defined $new) {
            $new = "";
        }
        if ($old ne $new) {
            if ($col eq 'assigned_to' || $col eq 'qa_contact') {
                $old = DBID_to_name($old) if $old != 0;
                $new = DBID_to_name($new) if $new != 0;
            }
            if ($col eq 'product') {
                RemoveVotes($id,
                            "This bug has been moved to a different product");
            }
            $col = SqlQuote($col);
            $old = SqlQuote($old);
            $new = SqlQuote($new);
            my $q = "insert into bugs_activity (bug_id,who,bug_when,field,oldvalue,newvalue) values ($id,$whoid,$timestamp,$col,$old,$new)";
            # puts "<pre>$q</pre>"
            SendSQL($q);
        }
    }
    
    print "<TABLE BORDER=1><TD><H2>Changes to bug $id submitted</H2>\n";
    SendSQL("unlock tables");
    system("./processmail $id $::FORM{'who'}");
    print "<TD><A HREF=\"show_bug.cgi?id=$id\">Back To BUG# $id</A></TABLE>\n";

    foreach my $k (keys(%dependencychanged)) {
        print "<TABLE BORDER=1><TD><H2>Checking for dependency changes on bug $k</H2>\n";
        system("./processmail $k $::FORM{'who'}");
        print "<TD><A HREF=\"show_bug.cgi?id=$k\">Go To BUG# $k</A></TABLE>\n";
    }

}

if (defined $::next_bug) {
    print("<P>The next bug in your list is:\n");
    $::FORM{'id'} = $::next_bug;
    print "<HR>\n";

    navigation_header();
    do "bug_form.pl";
} else {
    navigation_header();
}