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# 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.
package Bugzilla::WebService::Util;
use 5.10.1;
use strict;
use warnings;
use Bugzilla::Flag;
use Bugzilla::FlagType;
use Bugzilla::Error;
use Storable qw(dclone);
use List::MoreUtils qw(any none);
use parent qw(Exporter);
# We have to "require", not "use" this, because otherwise it tries to
# use features of Test::More during import().
require Test::Taint;
our @EXPORT_OK = qw(
extract_flags
filter
filter_wants
taint_data
validate
translate
params_to_objects
fix_credentials
);
sub extract_flags {
my ($flags, $bug, $attachment) = @_;
my (@new_flags, @old_flags);
my $flag_types = $attachment ? $attachment->flag_types : $bug->flag_types;
my $current_flags = $attachment ? $attachment->flags : $bug->flags;
# Copy the user provided $flags as we may call extract_flags more than
# once when editing multiple bugs or attachments.
my $flags_copy = dclone($flags);
foreach my $flag (@$flags_copy) {
my $id = $flag->{id};
my $type_id = $flag->{type_id};
my $new = delete $flag->{new};
my $name = delete $flag->{name};
if ($id) {
my $flag_obj = grep($id == $_->id, @$current_flags);
$flag_obj || ThrowUserError('object_does_not_exist',
{ class => 'Bugzilla::Flag', id => $id });
}
elsif ($type_id) {
my $type_obj = grep($type_id == $_->id, @$flag_types);
$type_obj || ThrowUserError('object_does_not_exist',
{ class => 'Bugzilla::FlagType', id => $type_id });
if (!$new) {
my @flag_matches = grep($type_id == $_->type->id, @$current_flags);
@flag_matches > 1 && ThrowUserError('flag_not_unique',
{ value => $type_id });
if (!@flag_matches) {
delete $flag->{id};
}
else {
delete $flag->{type_id};
$flag->{id} = $flag_matches[0]->id;
}
}
}
elsif ($name) {
my @type_matches = grep($name eq $_->name, @$flag_types);
@type_matches > 1 && ThrowUserError('flag_type_not_unique',
{ value => $name });
@type_matches || ThrowUserError('object_does_not_exist',
{ class => 'Bugzilla::FlagType', name => $name });
if ($new) {
delete $flag->{id};
$flag->{type_id} = $type_matches[0]->id;
}
else {
my @flag_matches = grep($name eq $_->type->name, @$current_flags);
@flag_matches > 1 && ThrowUserError('flag_not_unique', { value => $name });
if (@flag_matches) {
$flag->{id} = $flag_matches[0]->id;
}
else {
delete $flag->{id};
$flag->{type_id} = $type_matches[0]->id;
}
}
}
if ($flag->{id}) {
push(@old_flags, $flag);
}
else {
push(@new_flags, $flag);
}
}
return (\@old_flags, \@new_flags);
}
sub filter($$;$$) {
my ($params, $hash, $types, $prefix) = @_;
my %newhash = %$hash;
foreach my $key (keys %$hash) {
delete $newhash{$key} if !filter_wants($params, $key, $types, $prefix);
}
return \%newhash;
}
sub filter_wants($$;$$) {
my ($params, $field, $types, $prefix) = @_;
# Since this is operation is resource intensive, we will cache the results
# This assumes that $params->{*_fields} doesn't change between calls
my $cache = Bugzilla->request_cache->{filter_wants} ||= {};
$field = "${prefix}.${field}" if $prefix;
if (exists $cache->{$field}) {
return $cache->{$field};
}
# Mimic old behavior if no types provided
my %field_types = map { $_ => 1 } (ref $types ? @$types : ($types || 'default'));
my %include = map { $_ => 1 } @{ $params->{'include_fields'} || [] };
my %exclude = map { $_ => 1 } @{ $params->{'exclude_fields'} || [] };
my %include_types;
my %exclude_types;
# Only return default fields if nothing is specified
$include_types{default} = 1 if !%include;
# Look for any field types requested
foreach my $key (keys %include) {
next if $key !~ /^_(.*)$/;
$include_types{$1} = 1;
delete $include{$key};
}
foreach my $key (keys %exclude) {
next if $key !~ /^_(.*)$/;
$exclude_types{$1} = 1;
delete $exclude{$key};
}
# Explicit inclusion/exclusion
return $cache->{$field} = 0 if $exclude{$field};
return $cache->{$field} = 1 if $include{$field};
# If the user has asked to include all or exclude all
return $cache->{$field} = 0 if $exclude_types{'all'};
return $cache->{$field} = 1 if $include_types{'all'};
# If the user has not asked for any fields specifically or if the user has asked
# for one or more of the field's types (and not excluded them)
foreach my $type (keys %field_types) {
return $cache->{$field} = 0 if $exclude_types{$type};
return $cache->{$field} = 1 if $include_types{$type};
}
my $wants = 0;
if ($prefix) {
# Include the field if the parent is include (and this one is not excluded)
$wants = 1 if $include{$prefix};
}
else {
# We want to include this if one of the sub keys is included
my $key = $field . '.';
my $len = length($key);
$wants = 1 if grep { substr($_, 0, $len) eq $key } keys %include;
}
return $cache->{$field} = $wants;
}
sub taint_data {
my @params = @_;
return if !@params;
# Though this is a private function, it hasn't changed since 2004 and
# should be safe to use, and prevents us from having to write it ourselves
# or require another module to do it.
Test::Taint::_deeply_traverse(\&_delete_bad_keys, \@params);
Test::Taint::taint_deeply(\@params);
}
sub _delete_bad_keys {
foreach my $item (@_) {
next if ref $item ne 'HASH';
foreach my $key (keys %$item) {
# Making something a hash key always untaints it, in Perl.
# However, we need to validate our argument names in some way.
# We know that all hash keys passed in to the WebService will
# match \w+, contain '.' or '-', so we delete any key that
# doesn't match that.
if ($key !~ /^[\w\.\-]+$/) {
delete $item->{$key};
}
}
}
return @_;
}
sub validate {
my ($self, $params, @keys) = @_;
# If $params is defined but not a reference, then we weren't
# sent any parameters at all, and we're getting @keys where
# $params should be.
return ($self, undef) if (defined $params and !ref $params);
my @id_params = qw(ids comment_ids);
# If @keys is not empty then we convert any named
# parameters that have scalar values to arrayrefs
# that match.
foreach my $key (@keys) {
if (exists $params->{$key}) {
$params->{$key} = [ $params->{$key} ] unless ref $params->{$key};
if (any { $key eq $_ } @id_params) {
my $ids = $params->{$key};
ThrowCodeError('param_scalar_array_required', { param => $key })
unless ref($ids) eq 'ARRAY' && none { ref $_ } @$ids;
}
}
}
return ($self, $params);
}
sub translate {
my ($params, $mapped) = @_;
my %changes;
while (my ($key,$value) = each (%$params)) {
my $new_field = $mapped->{$key} || $key;
$changes{$new_field} = $value;
}
return \%changes;
}
sub params_to_objects {
my ($params, $class) = @_;
my (@objects, @objects_by_ids);
@objects = map { $class->check($_) }
@{ $params->{names} } if $params->{names};
@objects_by_ids = map { $class->check({ id => $_ }) }
@{ $params->{ids} } if $params->{ids};
push(@objects, @objects_by_ids);
my %seen;
@objects = grep { !$seen{$_->id}++ } @objects;
return \@objects;
}
sub fix_credentials {
my ($params) = @_;
# Allow user to pass in login=foo&password=bar as a convenience
# even if not calling GET /login. We also do not delete them as
# GET /login requires "login" and "password".
if (exists $params->{'login'} && exists $params->{'password'}) {
$params->{'Bugzilla_login'} = delete $params->{'login'};
$params->{'Bugzilla_password'} = delete $params->{'password'};
}
# Allow user to pass api_key=12345678 as a convenience which becomes
# "Bugzilla_api_key" which is what the auth code looks for.
if (exists $params->{api_key}) {
$params->{Bugzilla_api_key} = delete $params->{api_key};
}
# Allow user to pass token=12345678 as a convenience which becomes
# "Bugzilla_token" which is what the auth code looks for.
if (exists $params->{'token'}) {
$params->{'Bugzilla_token'} = delete $params->{'token'};
}
# Allow extensions to modify the credential data before login
Bugzilla::Hook::process('webservice_fix_credentials', { params => $params });
}
__END__
=head1 NAME
Bugzilla::WebService::Util - Utility functions used inside of the WebService
code. These are B<not> functions that can be called via the WebService.
=head1 DESCRIPTION
This is somewhat like L<Bugzilla::Util>, but these functions are only used
internally in the WebService code.
=head1 SYNOPSIS
filter({ include_fields => ['id', 'name'],
exclude_fields => ['name'] }, $hash);
my $wants = filter_wants $params, 'field_name';
validate(@_, 'ids');
=head1 METHODS
=head2 filter
This helps implement the C<include_fields> and C<exclude_fields> arguments
of WebService methods. Given a hash (the second argument to this subroutine),
this will remove any keys that are I<not> in C<include_fields> and then remove
any keys that I<are> in C<exclude_fields>.
An optional third option can be passed that prefixes the field name to allow
filtering of data two or more levels deep.
For example, if you want to filter out the C<id> key/value in components returned
by Product.get, you would use the value C<component.id> in your C<exclude_fields>
list.
=head2 filter_wants
Returns C<1> if a filter would preserve the specified field when passing
a hash to L</filter>, C<0> otherwise.
=head2 validate
This helps in the validation of parameters passed into the WebService
methods. Currently it converts listed parameters into an array reference
if the client only passed a single scalar value. It modifies the parameters
hash in place so other parameters should be unaltered.
=head2 translate
WebService methods frequently take parameters with different names than
the ones that we use internally in Bugzilla. This function takes a hashref
that has field names for keys and returns a hashref with those keys renamed
according to the mapping passed in with the second parameter (which is also
a hashref).
=head2 params_to_objects
Creates objects of the type passed in as the second parameter, using the
parameters passed to a WebService method (the first parameter to this function).
Helps make life simpler for WebService methods that internally create objects
via both "ids" and "names" fields. Also de-duplicates objects that were loaded
by both "ids" and "names". Returns an arrayref of objects.
=head2 fix_credentials
Allows for certain parameters related to authentication such as Bugzilla_login,
Bugzilla_password, and Bugzilla_token to have shorter named equivalents passed in.
This function converts the shorter versions to their respective internal names.
=head2 extract_flags
Subroutine that takes a list of hashes that are potential flag changes for
both bugs and attachments. Then breaks the list down into two separate lists
based on if the change is to add a new flag or to update an existing flag.
=head1 B<Methods in need of POD>
=over
=item taint_data
=back