#!/usr/bin/perl -w

# $Id: cpandb 45 2014-12-09 07:52:52Z stro $

use strict;
use warnings;
use CPAN::SQLite;
use CPAN::SQLite::Util qw(%chaps);
use Getopt::Long;
my ($CPAN, $setup, $help, $reindex, $index, $query,
    $db_name, $db_dir, $module, $dist, $cpanid, $update);

my $rc = GetOptions('CPAN=s' => \$CPAN,
                    'db_name=s' => \$db_name,
                    'db_dir=s' => \$db_dir,
                    'setup' => \$setup,
                    'update' => \$update,
                    'help' => \$help,
                    'module=s' => \$module,
                    'dist=s' => \$dist,
                    'cpanid=s' => \$cpanid,
                    'reindex=s' => \$reindex);

$query = ($module or $dist or $cpanid);
$index = ($update or $reindex or $setup);

if ($help or not $rc or not ($index or $query)) {
    print <<"END";

Setup, maintain, and search the CPAN::SQLite database
Usage:
   $^X $0 --setup
   $^X $0 --update
   $^X $0 --reindex dist_name

   $^X $0 --module  Mod::Name
   $^X $0 --dist  Distname
   $^X $0 --cpanid  CPANID

   $^X $0 --help
END
    exit(1);
}

if (defined $setup and defined $reindex) {
  die "Must reindex on an existing database";
}

if ($index) {
  my $obj = CPAN::SQLite->new(CPAN => $CPAN,
                              setup => $setup,
                              db_name => $db_name,
                              db_dir => $db_dir,
                              reindex => $reindex,
                             );
  $obj->index();
}
else {

  my $max_results = 100;
  my $obj = CPAN::SQLite->new(CPAN => $CPAN,
                              db_name => $db_name,
                              db_dir => $db_dir,
                              max_results => $max_results);
  my $results;

  RESULTS : {
    $module and do {
      $obj->query(mode => 'module', name => $module);
      $results = $obj->{results};
      if (not $results) {
        print qq{\nNo module by name of "$module" was found.\n};
        print qq{Error: $obj->{error}\n} if $obj->{error};
      }
      else {
        my $abs = $results->{mod_abs} || '';
        my $dslip = '';
        if (my $dslip_info = $results->{dslip_info}) {
          foreach my $entry (@$dslip_info) {
            $dslip .= "  $entry->{desc}: $entry->{what}\n";
          }
        }
        my $chapter_desc = $results->{chapter_desc} || '';
        print << "EOI";

Module: $results->{mod_name}
Abstract: $abs
Version: $results->{mod_vers}
Chapter: $chapter_desc
Distribution: $results->{dist_name}
CPAN author: $results->{cpanid}
CPAN file: $results->{dist_file}
Download: $results->{download}
dslip info:
$dslip
EOI
      }
      last RESULTS;
    };
    $dist and do {
      $obj->query(mode => 'dist', name => $dist);
      $results = $obj->{results};
      if (not $results) {
        print qq{\nNo distribution by name of "$dist" was found.\n};
        print qq{Error: $obj->{error}\n} if $obj->{error};
      }
      else {
        my $abs = $results->{dist_abs} || '';
        my $dslip = '';
        if (my $dslip_info = $results->{dslip_info}) {
          foreach my $entry (@$dslip_info) {
            $dslip .= "  $entry->{desc}: $entry->{what}\n";
          }
        }
        print << "EOI";

Distribution: $results->{dist_name}
Abstract: $abs
Version: $results->{dist_vers}
CPAN author: $results->{cpanid}
CPAN file: $results->{dist_file}
Download: $results->{download}
dslip info:
$dslip
EOI
      }
      my $mods = $results->{mods};
      if ($mods and (ref($mods) eq 'ARRAY')) {
        print qq{\nProvided modules:\n};
        foreach my $item(@$mods) {
          my $abs = $item->{mod_abs} || '';
          print qq{  $item->{mod_name}: $abs\n};
        }
      }
      last RESULTS;
    };
    $cpanid and do {
      $obj->query(mode => 'author', name => $cpanid);
      $results = $obj->{results};
      if (not $results) {
        print qq{\nNo cpanid by name of "$cpanid" was found.\n};
        print qq{Error: $obj->{error}\n} if $obj->{error};
      }
      else {
        print << "EOI";

CPANID: $results->{cpanid}
Full Name: $results->{fullname}
email: $results->{email}
EOI
      }
      my $dists = $results->{dists};
      if ($dists and (ref($dists) eq 'ARRAY')) {
        print qq{\nAvailable distributions:\n};
        foreach my $item(@$dists) {
          my $abs = $item->{dist_abs} || '';
          print qq{  $item->{dist_file}: $abs\n};
        }
      }
      last RESULTS;
    };
  }
}

__END__

=head1 NAME

cpandb - interface to C<CPAN::SQLite>

=head1 VERSION

version 0.211

=head1 DESCRIPTION

This script is an interface to the routines of
L<CPAN::SQLite> for setting up, maintaining and
searching a C<DBD::SQLite> database
of CPAN. Available options can be grouped into
three categories.

=head2 Common options

These are options which are common to both setting up
and maintaining the database or performing queries on it.
These are

=over 3

=item * C<--CPAN  '/path/to/CPAN'>

This specifies the path to where the index files are
to be stored. This could be a local CPAN mirror,
defined here by the presence of a F<MIRRORED.BY> file beneath
this directory, or a local directory in which to store
these files from a remote CPAN mirror. In the latter case,
the index files are fetched from a remote CPAN mirror,
using the same list that C<CPAN.pm> uses, if this is
configured, and are updated if they are more than one
day old.

If the C<CPAN> option is not given, it will default
to C<cpan_home> of L<CPAN::>, if this is configured,
with the sources being found under C<keep_source_where>.
A fatal error results if such a directory isn't found.
Updates to these index files are assumed here to be
handled by C<CPAN.pm>.

=item * C<--db_name  'cpan-sqlite'>

This is the name of the database that C<DBD::SQLite>
will use. If not given, this defaults to C<cpandb-sqlite>.

=item * C<--db_dir  '/path/to/db/dir'>

This specifies the path to where the database file is
found. If not given, it defaults to the
C<cpan_home> directory of C<CPAN.pm>, if present, or to
the directory in which the script was invoked.

=back

=head2 Indexing options

These are options which are used for setting up and
maintaining the database. These include

=over 3

=item * C<--setup>

This specifies that the database is to be created and
populated from the CPAN indices; any existing database
will be overwritten.

=item * C<--update>

This is used to update an existing database,
which must have first been created with the C<setup>
option.

=item * C<--reindex 'dist_name'>

This specifies that the CPAN distribution C<dist_name>
is to be reindexed.

=back

=head2 Querying options

These options are used to query the database. Available
options are

=over 3

=item * C<--module Mod::Name>

This provides information on the specified module name.

=item * C<--dist Dist-Name>

This provides information on the specified distribution name.

=item * C<--cpanid CPANID>

This provides information on the specified CPAN author id

=back

All search terms are assumed to be exact matches in a
case-insensitive manner.

=head1 SEE ALSO

L<CPAN::SQLite>.

=cut