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

#
# dlese-parserecord.pl - Parse DLESE Metadata
# This program reads a file dlese-identifiers.xml then requests each record and stores in a sub-directory called dlese
#
# Written by Andy Dong <adong@smete.org> 11/01/2001
#

use strict;
use Getopt::Std;
use Time::HiRes qw(usleep ualarm gettimeofday tv_interval);

use HTTP::Request;
use LWP::UserAgent;

use XML::Element;
use XML::Parser;
use XML::TreeBuilder;

require OAIvocabulary_v2;
require OAIcataloging_v2;

# -u flag specifies [u]pdate database; otherwise output to STDOUT

my $usage = << "EOT";
Usage: dlese-parserecord.pl -u

    -u (U)pdate the database

    Without -u it simply prints to STDOUT
EOT

my %args;
getopts('u', \%args) || die $usage;

my $inserted = 0;
my $updated = 0;          

my $useDatabase = 1 if ($args{'u'});
my $dbh;

my $t0 = [gettimeofday];

# Database Configuration
if ( $useDatabase ) {
	print "Updating the database\n";
	my $DBI_DSN='dbi:ODBC:mel.odbc';
	my $DBI_USER='autocataloger';
	my $DBI_PWD='regolatacotua';
	$dbh= DBI->connect($DBI_DSN, $DBI_USER, $DBI_PWD, { RaiseError => 1, AutoCommit => 0 }) || die "Unable to connect to database $DBI_DSN as $DBI_USER\n";;
}

# First parse the dlese-identifiers.xml file to get the list of available records
my $tree = XML::TreeBuilder->new();
$tree->parse_file('dlese-identifiers.xml');
my @identifiers = $tree->find_by_tag_name('identifier');

# Now go grab them and save them to a file
foreach my $identifier (@identifiers) {
	my $record = $identifier->as_text();

	my $getrecord_tree = XML::TreeBuilder->new();
	$getrecord_tree->parse_file("dlese/$record");

	my $metadata = $getrecord_tree->find_by_tag_name('metadata');

	# <general>
	my $general_element = $metadata->find_by_tag_name('general');
	my $title_element = $general_element->find_by_tag_name('title');
	my $title = $title_element->find_by_tag_name('langstring')->as_text();
	# Note: DLESE appears to use general.extension.topic for keywords not general.keywords
	my @keywords_list = ();
	my @keywords_element = $general_element->find_by_tag_name('topic');
	foreach my $topics (@keywords_element) {
		push(@keywords_list,$topics->find_by_tag_name('langstring')->as_text());
	}
	my $keywords = join(',',@keywords_list);
	my $description_element = $general_element->find_by_tag_name('description');
	my $description = $description_element->find_by_tag_name('langstring')->as_text();
	my $language = $general_element->find_by_tag_name('language')->as_text();

	# <metametadata>
	my $metametadata_element = $metadata->find_by_tag_name('metametadata');
	my $catalog_entry_element = $metametadata_element->find_by_tag_name('accession')->as_text();
	my ($pub_year,$pub_month,$pub_day) = ( $catalog_entry_element =~ /^(\d{4})-(\d{2})-(\d{2})$/ );

	# <technical>
	my $technical_element = $metadata->find_by_tag_name('technical');
	my $location = $technical_element->find_by_tag_name('location')->as_text;
	my $format_element = $technical_element->find_by_tag_name('format');
	my $format = $format_element->find_by_tag_name('langstring')->as_text;
	if ( $format eq 'text/html' ) {
		$format = 65;	# text/html
	} else {
		$format = 0;	# unknown
	}
	my $platform = "5";	# HTML Browser (not specified but construed from metadata)

	# <lifecycle>
	my $lifecycle_element=$metadata->find_by_tag_name('lifecycle');
	my $version= $lifecycle_element->find_by_tag_name('version');
	my $version_string = $version->find_by_tag_name('langstring')->as_text();
	my @contributor_element = $lifecycle_element->find_by_tag_name('contribute');

	my @author_reg_key = ();
	my @contact_reg_key = ();
	my @publisher_reg_key = ();
	my @other_reg_key = ();
	my $reg_key;
	foreach my $contributor_item (@contributor_element) {
		my $role_element = $contributor_item->find_by_tag_name('role');
		my $role = $role_element->find_by_tag_name('langstring')->as_text();
		my $role_id;
		if ( $role eq "Author" ) {
			$role_id = 8;
		} elsif ( $role eq "Publisher" ) {
			$role_id = 9;
		} elsif ( $role eq "Contact" ) {
			$role_id = 11;
		} else {
			$role_id = 4;
		}
		my $centity = $contributor_item->find_by_tag_name('centity');
		my $role_extension = $centity->find_by_tag_name('extension');
		my $person_first_name = $role_extension->find_by_tag_name('firstname')->as_text();
		my $person_last_name = $role_extension->find_by_tag_name('lastname')->as_text();
		my $person_middle_name = $role_extension->find_by_tag_name('mi')->as_text();
		my $person_title = $role_extension->find_by_tag_name('nametitle')->as_text();
		my $person_company = $role_extension->find_by_tag_name('org')->as_text();
		my $entity_email_address = $role_extension->find_by_tag_name('email')->as_text();
		my $entity_address = $role_extension->find_by_tag_name('adr')->as_text();
		my $entity_city = $role_extension->find_by_tag_name('city')->as_text();
		my $entity_state = $role_extension->find_by_tag_name('state')->as_text();
		my $entity_postal_code = $role_extension->find_by_tag_name('zip')->as_text();
		my $entity_home_page_url = $role_extension->find_by_tag_name('url')->as_text();
		my $entity_phone = $role_extension->find_by_tag_name('tel')->as_text();
		my $entity_fax = $role_extension->find_by_tag_name('fax')->as_text();
		my $entity_country = $role_extension->find_by_tag_name('country')->as_text();

		# if there is no $person_first_name, then this is an organization
		my $object_type;
		if ( not $person_first_name ) {
			$object_type = 'organization';
		} else {
			$object_type = 'person';
		}
		if ( $useDatabase ) {
			# DLESE
			my $collection_reg_key = '{CA001C50-77CA-43DC-A761-95207D386EDD}';
			# Andy Dong
			my $submitter_key = '{710FE693-46E9-4002-BA94-1BE2E6218CD6}'; # Andy Dong
			# Does this entity exist
			if ( $object_type eq 'organization' ) {
				if ( ! ($reg_key = OAIc_orgexists($dbh,$person_company)) ) {
					my $success = OAIc_insert_org($dbh,$collection_reg_key,$submitter_key,$entity_email_address,$person_company,$entity_address,$entity_city,$entity_state,$entity_postal_code,$entity_home_page_url,$entity_phone,$entity_fax,$entity_country);
		                	$reg_key = OAIc_orgexists($dbh,$person_company);
					printf("Inserted new organization %s\n", $reg_key);
				}
			} else {
				if ( ! ($reg_key = OAIc_personexists($dbh,$entity_email_address)) ) {
					my $success = OAIc_insert_person_full($dbh,$collection_reg_key,$submitter_key,$person_last_name,$person_first_name,$entity_email_address,$person_company,$person_middle_name,$person_title,$entity_address,$entity_city,$entity_state,$entity_postal_code,$entity_home_page_url,$entity_phone,$entity_fax,$entity_country);
			                $reg_key = OAIc_personexists($dbh,$entity_email_address);
					printf("Inserted new person %s\n", $reg_key);
				}
			} 
			# Push author, contact and publisher id into array for insert/update into the database
			if ( $role_id == 8 ) {
				push(@author_reg_key,$reg_key);
			} elsif ( $role_id == 9 ) {
				push(@publisher_reg_key,$reg_key);
			} elsif ( $role_id == 11 ) {
				push(@contact_reg_key,$reg_key);
			} else {
				push(@other_reg_key,$reg_key);
			}
		} else {
		printf("Author/Publisher/Contact Information (%d): %s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n", $role_id, $person_first_name, $person_last_name, $person_middle_name, $person_title, $person_company, $entity_email_address, $entity_address, $entity_city, $entity_state, $entity_postal_code, $entity_home_page_url, $entity_phone, $entity_fax, $entity_country);
		printf("This is a(n) %s.\n", $object_type);
		}
	}

	# <educational>
	my $educational_element = $metadata->find_by_tag_name('educational');
	my @learning_context_element = $educational_element->find_by_tag_name('learningcontext');
	my @learning_context_list = ();
	foreach my $learning_context_item (@learning_context_element) {
		push(@learning_context_list,OAIv_findLContext($learning_context_item->find_by_tag_name('langstring')->as_text()));
	}
	my $learning_context;
	if (@learning_context_list) {
		$learning_context = join(';',@learning_context_list);
	}
	my @intendedenduserrole_element = $educational_element->find_by_tag_name('intendedenduserrole');
	my $intendedenduserrole_id = 0;
	foreach my $intendedenduserrole_item (@intendedenduserrole_element) {
		my $intendedenduserrole = $intendedenduserrole_item->find_by_tag_name('langstring')->as_text();
		if ($intendedenduserrole eq 'Learner') {
			$intendedenduserrole_id = 2;
		} elsif ($intendedenduserrole eq 'Teacher') {
			$intendedenduserrole_id = 1;
		}
	}

	# <rights>
	my $rights_element = $metadata->find_by_tag_name('rights');
	my $cost_element = $rights_element->find_by_tag_name('cost');
	my $cost = $cost_element->find_by_tag_name('langstring')->as_text();
	# This is version.purchase_license_type_id
	if ( $cost eq 'No') {
		$cost= 1;
	} else {
		$cost = 3;
	}
	my $rights_description_element = $rights_element->find_by_tag_name('description');
	my $rights_description = $rights_description_element->find_by_tag_name('langstring')->as_text();

	if ( $useDatabase ) {
		# General configuration information for DLESE
		my $image = "http://www.smete.org/images/affiliation/dlese.gif";
		my $submitter_key = '{710FE693-46E9-4002-BA94-1BE2E6218CD6}'; # Andy Dong
		my $collection = 'Digital Library for Earth System Education';
		my $collection_reg_key = '{CA001C50-77CA-43DC-A761-95207D386EDD}';
		my $publisher = 'Digital Library for Earth System Education';
		push(@publisher_reg_key,'{CA001C50-77CA-43DC-A761-95207D386EDD}');
        	if ( my $general_key = OAIc_loexists($dbh,$title) ) {
#		my $success = OAIc_update_lo_dlese($dbh, $general_key, $title, $language, $description, $image, $pub_month, $pub_year, $keywords, $submitter_key, $publisher, $collection, $format, $platform, $location, $learning_context, $intendedenduserrole_id, $collection_reg_key, $rights_description, $cost);
		my $success = OAIc_update_lo_dlese($dbh, $general_key, $learning_context, $intendedenduserrole_id, $rights_description, $cost);
                $updated = $updated + 1;
		} else { 
		printf("Inserting new record for %s\n",$title);
		my $success = OAIc_insert_lo_dlese($dbh, $title, $language, $description, $image, $pub_month, $pub_year, $keywords, $submitter_key, $publisher, $collection, $format, $platform, $location, $learning_context, $intendedenduserrole_id, $collection_reg_key, $rights_description, $cost);
		my $id = OAIc_loexists($dbh,$title);
		# INSERT INTO [needs_3_1]..learning_object_contributor
		# Add author contribution (ct_key=8)                  
			foreach my $author (@author_reg_key) { 
			printf("Adding author contribution for %s\n", $author);
			my $rc = $dbh->do(q{INSERT INTO learning_object_contributor (learning_object_id, entity_id, role_id) VALUES (?,?,8)}, undef, $id,$author);
			}
		# Add publisher contribution (ct_key=9)
			foreach my $publisher_id (@publisher_reg_key) {
			printf("Adding publisher contribution for %s\n", $publisher_id);
			my $rc = $dbh->do(q{INSERT INTO learning_object_contributor (learning_object_id, entity_id, role_id) VALUES (?,?,9)}, undef, $id,$publisher_id);
			}
		# Add contact contribution (ct_key=11)
			foreach my $contact (@contact_reg_key) {
			printf("Adding contact contribution for %s\n", $contact);
			my $rc = $dbh->do(q{INSERT INTO learning_object_contributor (learning_object_id, entity_id, role_id) VALUES (?,?,11)}, undef, $id, $contact);
			}
		# Add other contribution (ct_key=4)
			foreach my $other (@other_reg_key) {
			printf("Adding other contribution for %s\n", $other);
			my $rc = $dbh->do(q{INSERT INTO learning_object_contributor (learning_object_id, entity_id, role_id) VALUES (?,?,4)}, undef, $id, $other);
			}
		# Add collection contribution (ct_key=12)
			my $rc = $dbh->do(q{INSERT INTO learning_object_contributor (learning_object_id, entity_id, role_id) VALUES (?,?,12)}, undef, $id, $collection_reg_key);
			if (!$rc) {
			$dbh->rollback;
			$dbh->disconnect;
			die "Unable to insert new record into learning_object_contributor: $dbh->errstr\n";
		}
                $inserted = $inserted + 1;
		}
		$dbh->commit;
		$getrecord_tree->delete;
	} else {
	# Print parsed data
	printf("Title: %s\tKeywords: %s\tDescription: %s\n", $title,$keywords,$description);
	printf("Publication %d-%d\n", $pub_month, $pub_year);
	printf("Format: %s\tPlatform: %s\tLocation: %s\n", $format, $platform, $location);
	printf("Learning Context: %s\tIntended End User Role: %d\n", $learning_context,$intendedenduserrole_id);
	printf("Cost: %s\tCopyright: %s\n", $cost, substr($rights_description,0,1024));
	$getrecord_tree->delete;
	}

}

$tree->delete;

if ( $useDatabase ) {               
	$dbh->disconnect();
}

printf("Inserted %d records and Updated %d records in %f seconds.\n", $inserted, $updated, tv_interval($t0));

exit 0;