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#!/usr/bin/perl -T
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

use 5.10.1;
use strict;
use warnings;

use lib qw(. lib);

use Bugzilla;
use Bugzilla::Constants;
use Bugzilla::Bug;
use Bugzilla::User;
use Bugzilla::Util;
use Bugzilla::Error;
use Bugzilla::Flag;
use Bugzilla::Status;
use Bugzilla::Token;

use List::MoreUtils qw(firstidx);
use Storable qw(dclone);

my $user = Bugzilla->login(LOGIN_REQUIRED);

my $cgi = Bugzilla->cgi;
my $dbh = Bugzilla->dbh;
my $template = Bugzilla->template;
my $vars = {};

######################################################################
# Subroutines
######################################################################

# Tells us whether or not a field should be changed by process_bug.
sub should_set {
    # check_defined is used for fields where there's another field
    # whose name starts with "defined_" and then the field name--it's used
    # to know when we did things like empty a multi-select or deselect
    # a checkbox.
    my ($field, $check_defined) = @_;
    my $cgi = Bugzilla->cgi;
    if ( defined $cgi->param($field) 
         || ($check_defined && defined $cgi->param("defined_$field")) )
    {
        return 1;
    }
    return 0;
}

######################################################################
# Begin Data/Security Validation
######################################################################

# Create a list of objects for all bugs being modified in this request.
my @bug_objects;
if (defined $cgi->param('id')) {
  my $bug = Bugzilla::Bug->check_for_edit(scalar $cgi->param('id'));
  $cgi->param('id', $bug->id);
  push(@bug_objects, $bug);
} else {
    foreach my $i ($cgi->param()) {
        if ($i =~ /^id_([1-9][0-9]*)/) {
            my $id = $1;
            push(@bug_objects, Bugzilla::Bug->check_for_edit($id));
        }
    }
}

# Make sure there are bugs to process.
scalar(@bug_objects) || ThrowUserError("no_bugs_chosen", {action => 'modify'});

my $first_bug = $bug_objects[0]; # Used when we're only updating a single bug.

# Delete any parameter set to 'dontchange'.
if (defined $cgi->param('dontchange')) {
    foreach my $name ($cgi->param) {
        next if $name eq 'dontchange'; # But don't delete dontchange itself!
        # Skip ones we've already deleted (such as "defined_$name").
        next if !defined $cgi->param($name);
        if ($cgi->param($name) eq $cgi->param('dontchange')) {
            $cgi->delete($name);
            $cgi->delete("defined_$name");
        }
    }
}

# do a match on the fields if applicable
Bugzilla::User::match_field({
    'qa_contact'                => { 'type' => 'single' },
    'newcc'                     => { 'type' => 'multi'  },
    'masscc'                    => { 'type' => 'multi'  },
    'assigned_to'               => { 'type' => 'single' },
});

print $cgi->header() unless Bugzilla->usage_mode == USAGE_MODE_EMAIL;

# Check for a mid-air collision. Currently this only works when updating
# an individual bug.
my $delta_ts = $cgi->param('delta_ts') || '';

if ($delta_ts) {
    my $delta_ts_z = datetime_from($delta_ts)
      or ThrowCodeError('invalid_timestamp', { timestamp => $delta_ts });

    my $first_delta_tz_z =  datetime_from($first_bug->delta_ts);

    if ($first_delta_tz_z ne $delta_ts_z) {
        ($vars->{'operations'}) = $first_bug->get_activity(undef, $delta_ts);

        # Always sort midair collision comments oldest to newest,
        # regardless of the user's personal preference.
        my $comments = $first_bug->comments({ order => 'oldest_to_newest',
                                              after => $delta_ts });

        # Show midair if previous changes made other than CC
        # and/or one or more comments were made
        my $do_midair = scalar @$comments ? 1 : 0;

        if (!$do_midair) {
            foreach my $operation (@{ $vars->{'operations'} }) {
                foreach my $change (@{ $operation->{'changes'} }) {
                    if ($change->{'fieldname'} ne 'cc') {
                        $do_midair = 1;
                        last;
                    }
                }
                last if $do_midair;
            }
        }

        if ($do_midair) {
            $vars->{'title_tag'} = "mid_air";
            $vars->{'comments'} = $comments;
            $vars->{'bug'} = $first_bug;
            # The token contains the old delta_ts. We need a new one.
            $cgi->param('token', issue_hash_token([$first_bug->id, $first_bug->delta_ts]));

            # Warn the user about the mid-air collision and ask them what to do.
            $template->process("bug/process/midair.html.tmpl", $vars)
                || ThrowTemplateError($template->error());
            exit;
        }
    }
}

# We couldn't do this check earlier as we first had to validate bug IDs
# and display the mid-air collision page if delta_ts changed.
# If we do a mass-change, we use session tokens.
my $token = $cgi->param('token');

if ($cgi->param('id')) {
    check_hash_token($token, [$first_bug->id, $delta_ts || $first_bug->delta_ts]);
}
else {
    check_token_data($token, 'buglist_mass_change', 'query.cgi');
}

######################################################################
# End Data/Security Validation
######################################################################

$vars->{'title_tag'} = "bug_processed";

my $action;
if (defined $cgi->param('id')) {
    $action = $user->setting('post_bug_submit_action');

    if ($action eq 'next_bug') {
        my $bug_list_obj = $user->recent_search_for($first_bug);
        my @bug_list = $bug_list_obj ? @{$bug_list_obj->bug_list} : ();
        my $cur = firstidx { $_ eq $cgi->param('id') } @bug_list;
        if ($cur >= 0 && $cur < $#bug_list) {
            my $next_bug_id = $bug_list[$cur + 1];
            detaint_natural($next_bug_id);
            if ($next_bug_id and $user->can_see_bug($next_bug_id)) {
                # We create an object here so that $bug->send_changes can use it
                # when displaying the header.
                $vars->{'bug'} = new Bugzilla::Bug($next_bug_id);
            }
        }
    }
    # Include both action = 'same_bug' and 'nothing'.
    else {
        $vars->{'bug'} = $first_bug;
    }
}
else {
    # param('id') is not defined when changing multiple bugs at once.
    $action = 'nothing';
}

# Component, target_milestone, and version are in here just in case
# the 'product' field wasn't defined in the CGI. It doesn't hurt to set
# them twice.
my @set_fields = qw(op_sys rep_platform priority bug_severity
                    component target_milestone version
                    bug_file_loc status_whiteboard short_desc
                    deadline remaining_time estimated_time
                    work_time set_default_assignee set_default_qa_contact
                    cclist_accessible reporter_accessible
                    product confirm_product_change
                    bug_status resolution dup_id bug_ignored);
push(@set_fields, 'assigned_to') if !$cgi->param('set_default_assignee');
push(@set_fields, 'qa_contact')  if !$cgi->param('set_default_qa_contact');
my %field_translation = (
    bug_severity => 'severity',
    rep_platform => 'platform',
    short_desc   => 'summary',
    bug_file_loc => 'url',
    set_default_assignee   => 'reset_assigned_to',
    set_default_qa_contact => 'reset_qa_contact',
    confirm_product_change => 'product_change_confirmed',
);

my %set_all_fields = ( other_bugs => \@bug_objects );
foreach my $field_name (@set_fields) {
    if (should_set($field_name, 1)) {
        my $param_name = $field_translation{$field_name} || $field_name;
        $set_all_fields{$param_name} = $cgi->param($field_name);
    }
}

if (should_set('keywords')) {
    my $action = $cgi->param('keywordaction') || '';
    # Backward-compatibility for Bugzilla 3.x and older.
    $action = 'remove' if $action eq 'delete';
    $action = 'set'    if $action eq 'makeexact';
    $set_all_fields{keywords}->{$action} = $cgi->param('keywords');
}
if (should_set('comment')) {
    $set_all_fields{comment} = {
        body        => scalar $cgi->param('comment'),
        is_private  => scalar $cgi->param('comment_is_private'),
    };
}
if (should_set('see_also')) {
    $set_all_fields{'see_also'}->{add} = 
        [split(/[\s]+/, $cgi->param('see_also'))];
}
if (should_set('remove_see_also')) {
    $set_all_fields{'see_also'}->{remove} = [$cgi->param('remove_see_also')];
}
foreach my $dep_field (qw(dependson blocked)) {
    if (should_set($dep_field)) {
        if (my $dep_action = $cgi->param("${dep_field}_action")) {
            $set_all_fields{$dep_field}->{$dep_action} =
                [split(/[\s,]+/, $cgi->param($dep_field))];
        }
        else {
            $set_all_fields{$dep_field}->{set} = $cgi->param($dep_field);
        }
    }
}
# Formulate the CC data into two arrays of users involved in this CC change.
if (defined $cgi->param('newcc')
    or defined $cgi->param('addselfcc')
    or defined $cgi->param('removecc')
    or defined $cgi->param('masscc')) 
{
    my (@cc_add, @cc_remove);
    # If masscc is defined, then we came from buglist and need to either add or
    # remove cc's... otherwise, we came from show_bug and may need to do both.
    if (defined $cgi->param('masscc')) {
        if ($cgi->param('ccaction') eq 'add') {
            @cc_add = $cgi->param('masscc');
        } elsif ($cgi->param('ccaction') eq 'remove') {
            @cc_remove = $cgi->param('masscc');
        }
    } else {
        @cc_add = $cgi->param('newcc');
        push(@cc_add, $user) if $cgi->param('addselfcc');

        # We came from show_bug which uses a select box to determine what cc's
        # need to be removed...
        if ($cgi->param('removecc') && $cgi->param('cc')) {
            @cc_remove = $cgi->param('cc');
        }
    }

    $set_all_fields{cc} = { add => \@cc_add, remove => \@cc_remove };
}

# Fields that can only be set on one bug at a time.
if (defined $cgi->param('id')) {
    # Since aliases are unique (like bug numbers), they can only be changed
    # for one bug at a time.
    if (defined $cgi->param('newalias') || defined $cgi->param('removealias')) {
        my @alias_add = split /[, ]+/, $cgi->param('newalias');

        # We came from bug_form which uses a select box to determine what
        # aliases need to be removed...
        my @alias_remove = ();
        if ($cgi->param('removealias') && $cgi->param('alias')) {
            @alias_remove = $cgi->param('alias');
        }

        $set_all_fields{alias} = { add => \@alias_add, remove => \@alias_remove };
    }
}

my %is_private;
foreach my $field (grep(/^defined_isprivate/, $cgi->param())) {
    if ($field =~ /(\d+)$/) {
        my $comment_id = $1;
        $is_private{$comment_id} = $cgi->param("isprivate_$comment_id");
    }
}
$set_all_fields{comment_is_private} = \%is_private;

my @check_groups = $cgi->param('defined_groups');
my @set_groups = $cgi->param('groups');
my ($removed_groups) = diff_arrays(\@check_groups, \@set_groups);
$set_all_fields{groups} = { add => \@set_groups, remove => $removed_groups };

my @custom_fields = Bugzilla->active_custom_fields;
foreach my $field (@custom_fields) {
    my $fname = $field->name;
    if (should_set($fname, 1)) {
        $set_all_fields{$fname} = [$cgi->param($fname)];
    }
}

# We are going to alter the list of removed groups, so we keep a copy here.
my @unchecked_groups = @$removed_groups;
foreach my $b (@bug_objects) {
    # Don't blindly ask to remove unchecked groups available in the UI.
    # A group can be already unchecked, and the user didn't try to remove it.
    # In this case, we don't want remove_group() to complain.
    my @remove_groups;
    foreach my $g (@{$b->groups_in}) {
        push(@remove_groups, $g->name) if grep { $_ eq $g->name } @unchecked_groups;
    }
    local $set_all_fields{groups}->{remove} = \@remove_groups;
    $b->set_all(\%set_all_fields);
}

if (defined $cgi->param('id')) {
    # Flags should be set AFTER the bug has been moved into another
    # product/component. The structure of flags code doesn't currently
    # allow them to be set using set_all.
    my ($flags, $new_flags) = Bugzilla::Flag->extract_flags_from_cgi(
        $first_bug, undef, $vars);
    $first_bug->set_flags($flags, $new_flags);

    # Tags can only be set to one bug at once.
    if (should_set('tag')) {
        my @new_tags = grep { trim($_) } split(/,/, $cgi->param('tag'));
        my ($tags_removed, $tags_added) = diff_arrays($first_bug->tags, \@new_tags);
        $first_bug->remove_tag($_) foreach @$tags_removed;
        $first_bug->add_tag($_) foreach @$tags_added;
    }
}
else {
    # Update flags on multiple bugs. The cgi params are slightly different
    # than on a single bug, so we need to call a different sub. We also
    # need to call this per bug, since we might be updating a flag in one
    # bug, but adding it to a second bug
    foreach my $b (@bug_objects) {
        my ($flags, $new_flags)
            = Bugzilla::Flag->multi_extract_flags_from_cgi($b, $vars);
        $b->set_flags($flags, $new_flags);
    }
}

##############################
# Do Actual Database Updates #
##############################
foreach my $bug (@bug_objects) {
    my $changes = $bug->update();

    if ($changes->{'bug_status'}) {
        my $new_status = $changes->{'bug_status'}->[1];
        # We may have zeroed the remaining time, if we moved into a closed
        # status, so we should inform the user about that.
        if (!is_open_state($new_status) && $changes->{'remaining_time'}) {
            $vars->{'message'} = "remaining_time_zeroed"
              if $user->is_timetracker;
        }
    }

    $bug->send_changes($changes, $vars);
}

# Delete the session token used for the mass-change.
delete_token($token) unless $cgi->param('id');

if (Bugzilla->usage_mode == USAGE_MODE_EMAIL) {
    # Do nothing.
}
elsif ($action eq 'next_bug' or $action eq 'same_bug') {
    my $bug = $vars->{'bug'};
    if ($bug and $user->can_see_bug($bug)) {
        if ($action eq 'same_bug') {
            # $bug->update() does not update the internal structure of
            # the bug sufficiently to display the bug with the new values.
            # (That is, if we just passed in the old Bug object, we'd get
            # a lot of old values displayed.)
            $bug = new Bugzilla::Bug($bug->id);
            $vars->{'bug'} = $bug;
        }
        $vars->{'bugs'} = [$bug];
        if ($action eq 'next_bug') {
            $vars->{'nextbug'} = $bug->id;
        }
        # For performance reasons, preload visibility of dependencies
        # and duplicates related to this bug.
        Bugzilla::Bug->preload([$bug]);

        $template->process("bug/show.html.tmpl", $vars)
          || ThrowTemplateError($template->error());
        exit;
    }
} elsif ($action ne 'nothing') {
    ThrowCodeError("invalid_post_bug_submit_action");
}

# End the response page.
unless (Bugzilla->usage_mode == USAGE_MODE_EMAIL) {
    $template->process("bug/navigate.html.tmpl", $vars)
        || ThrowTemplateError($template->error());
    $template->process("global/footer.html.tmpl", $vars)
        || ThrowTemplateError($template->error());
}

1;