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#!/usr/bin/perl -w
# 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.

=head1 NAME

bz_webservice_demo.pl - Show how to talk to Bugzilla via XMLRPC

=head1 SYNOPSIS

C<bz_webservice_demo.pl [options]>

C<bz_webservice_demo.pl --help> for detailed help

=cut

use strict;
use lib qw(lib);
use Getopt::Long;
use Pod::Usage;
use File::Basename qw(dirname);
use File::Spec;
use XMLRPC::Lite;

# If you want, say “use Bugzilla::WebService::Constants” here to get access
# to Bugzilla's web service error code constants.
# If you do this, remember to issue a “use lib” pointing to your Bugzilla
# installation directory, too.

my $help;
my $Bugzilla_uri;
my $Bugzilla_login;
my $Bugzilla_password;
my $Bugzilla_restrict;
my $Bugzilla_token;
my $bug_id;
my $product_name;
my $create_file_name;
my $legal_field_values;
my $add_comment;
my $private;
my $work_time;
my $fetch_extension_info = 0;
my $debug;

GetOptions('help|h|?'       => \$help,
           'uri=s'          => \$Bugzilla_uri,
           'login:s'        => \$Bugzilla_login,
           'password=s'     => \$Bugzilla_password,
           'restrictlogin!' => \$Bugzilla_restrict,
           'bug_id:s'       => \$bug_id,
           'product_name:s' => \$product_name,
           'create:s'       => \$create_file_name,
           'field:s'        => \$legal_field_values,
           'comment:s'      => \$add_comment,
           'private:i'      => \$private,
           'worktime:f'     => \$work_time,
           'extension_info' => \$fetch_extension_info,
           'debug'          => \$debug
          ) or pod2usage({'-verbose' => 0, '-exitval' => 1});

=head1 OPTIONS

=over

=item --help, -h, -?

Print a short help message and exit.

=item --uri

URI to Bugzilla's C<xmlrpc.cgi> script, along the lines of
C<http://your.bugzilla.installation/path/to/bugzilla/xmlrpc.cgi>.

=item --login

Bugzilla login name. Specify this together with B<--password> in order to log in.

Specify this without a value in order to log out.

=item --password

Bugzilla password. Specify this together with B<--login> in order to log in.

=item --restrictlogin

Gives access to Bugzilla's "Bugzilla_restrictlogin" option.
Specify this option while logging in to restrict the login token to be
only valid from the IP address which called
Don't specify this option to do the same thing as unchecking the box.

See Bugzilla's restrictlogin parameter for details.

=item --bug_id

Pass a bug ID to have C<bz_webservice_demo.pl> do some bug-related test calls.

=item --product_name

Pass a product name to have C<bz_webservice_demo.pl> do some product-related
test calls.

=item --create

Specify a file that contains settings for the creating of a new bug.

=item --field

Pass a field name to get legal values for this field. It must be either a
global select field (such as bug_status, resolution, rep_platform, op_sys,
priority, bug_severity) or a custom select field.

=item --comment

A comment to add to a bug identified by B<--bug_id>. You must also pass a B<--login>
and B<--password> to log in to Bugzilla.

=item --private

An optional non-zero value to specify B<--comment> as private.

=item --worktime

An optional double precision number specifying the work time for B<--comment>.

=item --extension_info

If specified on the command line, the script returns the information about the
extensions that are installed.

=item --debug

Enable tracing at the debug level of XMLRPC requests and responses.

=back

=head1 DESCRIPTION

=cut

pod2usage({'-verbose' => 1, '-exitval' => 0}) if $help;
_syntaxhelp('URI unspecified') unless $Bugzilla_uri;

# We will use this variable for SOAP call results.
my $soapresult;

# We will use this variable for function call results.
my $result;

=head2 Initialization

Using the XMLRPC::Lite class, you set up a proxy, as shown in this script.
Bugzilla's XMLRPC URI ends in C<xmlrpc.cgi>, so your URI looks along the lines
of C<http://your.bugzilla.installation/path/to/bugzilla/xmlrpc.cgi>.

=cut

my $proxy = XMLRPC::Lite->proxy($Bugzilla_uri);

=head2 Debugging

Enable tracing at the debug level of XMLRPC requests and responses if requested.

=cut

if ($debug) {
   $proxy->import(+trace => 'debug');
}

=head2 Checking Bugzilla's version

To make sure the Bugzilla you're connecting to supports the methods you wish to
call, you may want to compare the result of C<Bugzilla.version> to the
minimum required version your application needs.

=cut

$soapresult = $proxy->call('Bugzilla.version');
_die_on_fault($soapresult);
print 'Connecting to a Bugzilla of version ' . $soapresult->result()->{version} . ".\n";

=head2 Checking Bugzilla's timezone

To make sure that you understand the dates and times that Bugzilla returns to you, you may want to call C<Bugzilla.timezone>.

=cut

$soapresult = $proxy->call('Bugzilla.timezone');
_die_on_fault($soapresult);
print 'Bugzilla\'s timezone is ' . $soapresult->result()->{timezone} . ".\n";

=head2 Logging In and Out

=head3 Using Bugzilla's Environment Authentication

Use a
C<http://login:password@your.bugzilla.installation/path/to/bugzilla/xmlrpc.cgi>
style URI.
You don't log out if you're using this kind of authentication.

=head3 Using Bugzilla's CGI Variable Authentication

Use the C<User.login> and C<User.logout> calls to log in and out, as shown
in this script.

The C<Bugzilla_restrictlogin> parameter is optional.
If omitted, Bugzilla's defaults apply (as specified by its C<restrictlogin>
parameter).

=cut

if (defined($Bugzilla_login)) {
    if ($Bugzilla_login ne '') {
        # Log in.
        $soapresult = $proxy->call('User.login',
                                   { login => $Bugzilla_login,
                                     password => $Bugzilla_password,
                                     restrict_login => $Bugzilla_restrict } );
        $Bugzilla_token = $soapresult->result->{token};
        _die_on_fault($soapresult);
        print "Login successful.\n";
    }
    else {
        # Log out.
        $soapresult = $proxy->call('User.logout');
        _die_on_fault($soapresult);
        print "Logout successful.\n";
    }
}

=head2 Getting Extension Information

Returns all the information any extensions have decided to provide to the webservice.

=cut

if ($fetch_extension_info) {
    $soapresult = $proxy->call('Bugzilla.extensions', {token => $Bugzilla_token});
    _die_on_fault($soapresult);
    my $extensions = $soapresult->result()->{extensions};
    foreach my $extensionname (keys(%$extensions)) {
        print "Extension '$extensionname' information\n";
        my $extension = $extensions->{$extensionname};
        foreach my $data (keys(%$extension)) {
            print '  ' . $data . ' => ' . $extension->{$data} . "\n";
        }
    }
}

=head2 Retrieving Bug Information

Call C<Bug.get> with the ID of the bug you want to know more of.
The call will return a C<Bugzilla::Bug> object.

Note: You can also use "Bug.get_bugs" for compatibility with Bugzilla 3.0 API.

=cut

if ($bug_id) {
    $soapresult = $proxy->call('Bug.get', { ids => [$bug_id], token => $Bugzilla_token});
    _die_on_fault($soapresult);
    $result = $soapresult->result;
    my $bug = $result->{bugs}->[0];
    foreach my $field (keys(%$bug)) {
        my $value = $bug->{$field};
        if (ref($value) eq 'HASH') {
            foreach (keys %$value) {
                print "$_: " . $value->{$_} . "\n";
            }
        }
        else {
            print "$field: $value\n";
        }
    }
}

=head2 Retrieving Product Information

Call C<Product.get> with the name of the product you want to know more of.
The call will return a C<Bugzilla::Product> object.

=cut

if ($product_name) {
    $soapresult = $proxy->call('Product.get', {'names' => [$product_name], token => $Bugzilla_token});
    _die_on_fault($soapresult);
    $result = $soapresult->result()->{'products'}->[0];

    # Iterate all entries, the values may be scalars or array refs with hash refs.
    foreach my $key (sort(keys %$result)) {
      my $value = $result->{$key};

      if (ref($value)) {
        my $counter = 0;
        foreach my $hash (@$value) {
          while (my ($innerKey, $innerValue) = each %$hash) {
            print "$key.$counter.$innerKey: $innerValue\n";
          }
          ++$counter;
        }
      }
      else {
        print "$key: $value\n"
      }
    }
}

=head2 Creating A Bug

Call C<Bug.create> with the settings read from the file indicated on
the command line. The file must contain a valid anonymous hash to use
as argument for the call to C<Bug.create>.
The call will return a hash with a bug id for the newly created bug.

=cut

if ($create_file_name) {
    my $bug_fields = do "$create_file_name";
    $bug_fields->{Bugzilla_token} = $Bugzilla_token;
    $soapresult = $proxy->call('Bug.create', \%$bug_fields);
    _die_on_fault($soapresult);
    $result = $soapresult->result;

    if (ref($result) eq 'HASH') {
        foreach (keys(%$result)) {
            print "$_: $$result{$_}\n";
        }
    }
    else {
        print "$result\n";
    }

}

=head2 Getting Legal Field Values

Call C<Bug.legal_values> with the name of the field (including custom
select fields). The call will return a reference to an array with the
list of legal values for this field.

=cut

if ($legal_field_values) {
    $soapresult = $proxy->call('Bug.legal_values', {field => $legal_field_values, token => $Bugzilla_token} );
    _die_on_fault($soapresult);
    $result = $soapresult->result;

    print join("\n", @{$result->{values}}) . "\n";
}

=head2 Adding a comment to a bug

Call C<Bug.add_comment> with the bug id, the comment text, and optionally the number
of hours you worked on the bug, and a boolean indicating if the comment is private
or not.

=cut

if ($add_comment) {
    if ($bug_id) {
        $soapresult = $proxy->call('Bug.add_comment', {id => $bug_id,
            comment => $add_comment, private => $private, work_time => $work_time, token => $Bugzilla_token});
        _die_on_fault($soapresult);
        print "Comment added.\n";
    }
    else {
        print "A --bug_id must be supplied to add a comment.";
    }
}

=head1 NOTES

=head2 Character Set Encoding

Make sure that your application either uses the same character set
encoding as Bugzilla does, or that it converts correspondingly when using the
web service API.
By default, Bugzilla uses UTF-8 as its character set encoding.

=head2 Format For Create File

The create format file is a piece of Perl code, that should look something like
this:

    {
        product     => "TestProduct", 
        component   => "TestComponent",
        summary     => "TestBug - created from bz_webservice_demo.pl",
        version     => "unspecified",
        description => "This is a description of the bug... hohoho",
        op_sys      => "All",
        platform    => "All",	
        priority    => "P4",
        severity    => "normal"
    };

=head1 SEE ALSO

There are code comments in C<bz_webservice_demo.pl> which might be of further
help to you.

=cut

sub _die_on_fault {
    my $soapresult = shift;

    if ($soapresult->fault) {
        my ($package, $filename, $line) = caller;
        die $soapresult->faultcode . ' ' . $soapresult->faultstring .
            " in SOAP call near $filename line $line.\n";
    }
}

sub _syntaxhelp {
    my $msg = shift;

    print "Error: $msg\n";
    pod2usage({'-verbose' => 0, '-exitval' => 1});
}