=head1 java-lib.pl

Functions for managing Oracle JDK installations.

  foreign_require("tomcat", "tomcat-lib.pl");
  @sites = tomcat::list_tomcat_websites()

=cut

BEGIN { push(@INC, ".."); };
use warnings;
use WebminCore;

foreign_require('software', 'software-lib.pl');

sub search_pkg{
  my $pattern = $_[0];

  my @avail = ();
  if (defined(&software::update_system_search)) {
  	# Call the search function
    @avail = &software::update_system_search($pattern);
  } else {
  	# Scan through list manually
  	@avail = &software::update_system_available();
  	@avail = grep { $_->{'name'} =~ /\Q$pattern\E/i } @avail;
  }
  return sort @avail;
}

sub get_openjdk_patterns(){
	my %osinfo = &detect_operating_system();

	my %rv;
	if(	($osinfo{'real_os_type'} =~ /centos/i) or	#CentOS
			($osinfo{'real_os_type'} =~ /fedora/i)	or  #Fedora
			($osinfo{'real_os_type'} =~ /scientific/i)	){

		$rv{'search'}  = 'openjdk';
		$rv{'version'} = '^java-([0-9\.]+)-openjdk$';

	}elsif( $osinfo{'os_type'} =~ /debian/i){	#ubuntu
		$rv{'search'}  = 'openjdk-[0-9]+-jdk$';
		$rv{'version'} = 'openjdk-([0-9]+)-jdk';
	}
	return %rv;
}

sub get_openjdk_versions(){
	my $cache_file = "$module_config_directory/openjdk_version_cache";
	my %openjdk_versions;

	if(-f $cache_file){
		read_file_cached($cache_file, \%openjdk_versions);

		if($openjdk_versions{'updated'} >= (time() - 86400)){	#if last update was less than a day ago
			delete $openjdk_versions{'updated'};	#remove the cache mtime key
			return %openjdk_versions;
		}
	}

	my %patterns = get_openjdk_patterns();
	my @avail = search_pkg($patterns{'search'});
	foreach $a (@avail) {
		if($a->{'name'} =~ /$patterns{'version'}/){
			$openjdk_versions{$1} = $a->{'name'};
		}
	}

	#cache the results
	$openjdk_versions{'updated'} = time();
	&write_file($cache_file, \%openjdk_versions);
	delete $openjdk_versions{'updated'};	#remove the cache mtime key

	return %openjdk_versions;
}

sub get_latest_jdk_version(){

	my %java_tar_gz;
	my $cache_file = "$module_config_directory/oracle_version_cache";
  if(-f $cache_file){
  	read_file_cached($cache_file, \%java_tar_gz);
		if($java_tar_gz{'updated'} >= (time() - 86400)){        #if last update was less than a day ago
    	delete $java_tar_gz{'updated'}; #remove the cache mtime key
      return %java_tar_gz;
    }
  }

#	my $error;
#	my $url = 'https://www.oracle.com/java/technologies/downloads/';
#	$tmpfile = &transname("javase.html");
#	&error_setup(&text('install_err3', $url));
#	&http_download("www.oracle.com", 443, "/java/technologies/downloads/", $tmpfile, \$error,
#					undef, 1, undef, 0, 0, 1);

#	open($fh, '<', $tmpfile) or die "open:$!";
#	while(my $line = <$fh>){
#		#https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.tar.gz
#		if($line =~ /(https:\/\/download.oracle.com\/java\/([0-9]+)\/latest\/jdk-[0-9]+_linux-x64_bin.tar.gz)/){
#		#if($line =~ /"filepath":"(https:\/\/download.oracle.com\/otn-pub\/java\/jdk\/([a-z0-9-\.+]+)\/[a-z0-9]+\/jdk-[a-z0-9-\.]+_linux-x64_bin.tar.gz)/){
#			$java_tar_gz{$2} = $1;
#			#last;
#		}
#	}
#	close $fh;

	#cache the results
	$java_tar_gz{'updated'} = time();
  &write_file($cache_file, \%java_tar_gz);
  delete $java_tar_gz{'updated'}; #remove the cache mtime key

	return %java_tar_gz;
}

sub get_installed_jdk_versions(){
	my @jdks = get_installed_oracle_jdk_versions();

	push(@jdks, get_installed_openjdk_versions());
	return @jdks;
}

sub get_installed_openjdk_versions{

	my @pkgs = ();
	my %patterns = get_openjdk_patterns();

	my $cmd_out='';
	my $cmd_err='';
	if(has_command('rpm')){
		local $out = &execute_command("rpm -qa --queryformat \"%{NAME}\n\" \"*$patterns['search']*\"", undef, \$cmd_out, \$cmd_err, 0, 0);

		my @lines = split /\n/, $cmd_out;
		foreach my $line (@lines){
			if($line =~ /^(java-[0-9\.]+-openjdk).*/i){	#package pgdg96-centos is not installed
				push(@pkgs, $1);
			}
		}
	}elsif(has_command('dpkg')){
		local $out = &execute_command("dpkg -l \"*openjdk*\"", undef, \$cmd_out, \$cmd_err, 0, 0);

		my %all_pkgs;
		my @lines = split /\n/, $cmd_out;
		foreach my $line (@lines){
			if($line =~ /^(..)\s+(openjdk-[0-9\.]*)-.*:.*/i){
				my $pkg = $2;
				if($1 =~ /[uirph]i/){
					$all_pkgs{$pkg} = 1;
				}
			}
		}
		@pkgs = keys %all_pkgs;
	}else{
		my @dirs;
	    opendir(DIR, '/usr/java/') or return @dirs;
	    @dirs
	        = grep {
		    /^jdk-[0-9\.]+/
	          && -d "/usr/java/$_"
		} readdir(DIR);
	  closedir(DIR);
	}

	return sort @pkgs;
}

sub get_installed_oracle_jdk_versions{
	my @dirs;
    opendir(DIR, '/usr/java/') or return @dirs;
    @dirs
        = grep {
	    /^jdk[0-9\.\-_]+/
          && -d "/usr/java/$_"
	} readdir(DIR);
  closedir(DIR);

  return sort @dirs;
}

sub is_default_jdk{
	my $jdk_dir = $_[0];

	my %os_env;
	if(-f '/etc/profile.d/jdk.sh'){
		read_env_file('/etc/profile.d/jdk.sh', \%os_env);
	}elsif(-f '/etc/environment'){
		read_env_file('/etc/environment', \%os_env);
	}

	if($os_env{'JAVA_HOME'} eq $jdk_dir){
		return 1;
	}else{
		return 0;
	}
}

sub get_java_version(){
	local %version;
	local $out = &backquote_command('java \-version 2>&1');

	#Oracle Java <= 8
	if ($out =~ /Java\(TM\)\sSE\sRuntime\sEnvironment\s\(build\s([0-9]\.([0-9]+)\.[0-9]_([0-9]+)\-([a-z0-9]+))\)/) {
		$version{'full'} 		= $1;
		$version{'major'} 	= $2;
		$version{'release'} = $3;
		$version{'build'} 	= $4;
		$version{'vendor'}  = 'oracle';

	#Oracle Java >=12 - Java(TM) SE Runtime Environment (build 12.0.1+12)
	}elsif ($out =~ /Java\(TM\)\sSE\sRuntime\sEnvironment\s\(build\s((\d+)\.\d+\.\d+\+(\d+))\)/) {
		$version{'full'} 		= $1;
		$version{'major'} 	= $2;
		$version{'release'} = 0;
		$version{'build'} 	= $3;
		$version{'vendor'}  = 'oracle';

  #			OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-2ubuntu218.04)
  #     OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1~18.04-b09)
  }elsif ($out =~ /Runtime\sEnvironment\s\(build\s((\d+)\.(\d+)\.\d+[\+_](\d+))/) {
    if($2 eq '1'){  #1.8.x
      $version{'major'} 	= $3;
      $version{'release'} = $4;
      $version{'build'} 	= $5;
    }else{  #11.0.x
      $version{'major'} 	= $2;
    	$version{'release'} = $3;
    	$version{'build'} 	= $4;
    }
  	$version{'full'} 		= $1;

  	$version{'vendor'}  = 'openjdk';
	}else {
		$version{'major'} 	= 0;
		$version{'full'} 		= $out;
		$version{'release'} = 0;
		$version{'build'} 	= 0;
	}
	return %version;
}

sub get_java_home(){
	my $java_path = &resolve_links('/usr/bin/java');
	$java_path =~ s/\/bin\/java//;
	return $java_path;
}

sub set_default_java{
	my $jdk_dir = $_[0];

	my $alt_cmd = "";
	if(has_command('alternatives')){        #CentOS
			$alt_cmd = 'alternatives';
	}elsif(has_command('update-alternatives')){     #ubuntu
			$alt_cmd = 'update-alternatives';
	}else{
			print "Warning: No alternatives command found<br>";
	}

	if($alt_cmd ne ""){
		print "Updating Java using $alt_cmd<br>";
		my @jdk_progs = ('java', 'jar', 'javac');
		foreach my $prog (@jdk_progs){

			$cmd_out='';
			$cmd_err='';
			local $out = &execute_command("$alt_cmd --install /usr/bin/$prog $prog $jdk_dir/bin/$prog 1", undef, \$cmd_out, \$cmd_err, 0, 0);
			      $out.= &execute_command("$alt_cmd --set $prog $jdk_dir/bin/$prog", undef, \$cmd_out, \$cmd_err, 0, 0);

			if($cmd_err){
				$cmd_err = s/\n/<br>/g;
				&error("Error: $alt_cmd: $cmd_err");
			}else{
				$cmd_out = s/\n/<br>/g;
				print &html_escape($cmd_out);
			}
		}
	}

	print "<hr>Setting Java environment variables...<br>";
	my %os_env;
	$os_env{'J2SDKDIR'}  = $jdk_dir;
	$os_env{'JAVA_HOME'} = $jdk_dir;
	$os_env{'DERBY_HOME'}= "$jdk_dir/db";
	$os_env{'J2REDIR'}	 = "$jdk_dir/jre";

	if(-e '/etc/profile.d/'){
		$os_env{'PATH'}		 = "\$PATH:$jdk_dir/bin:$jdk_dir/db/bin:$jdk_dir/jre/bin";
		write_env_file('/etc/profile.d/jdk.sh', \%os_env, 1);
	}elsif(-e '/etc/environment'){
		read_env_file('/etc/environment', \%os_env);
		$os_env{'PATH'}		 = "$os_env{'PATH'}:$jdk_dir/bin:$jdk_dir/db/bin:$jdk_dir/jre/bin";
		write_env_file('/etc/environment', \%os_env, 0);
	}
}

sub unset_default_java{
	my $jdk_dir = $_[0];
	print "Removing Java environment variables ...<br>";
	if(-f '/etc/profile.d/jdk.sh'){
		unlink_file('/etc/profile.d/jdk.sh');
	}elsif(-f '/etc/environment'){
		my %os_env;
		read_env_file('/etc/environment', \%os_env);
		delete $os_env{'J2SDKDIR'};
		delete $os_env{'JAVA_HOME'};
		delete $os_env{'DERBY_HOME'};
		delete $os_env{'J2REDIR'};
		write_env_file('/etc/environment', \%os_env, 0);
	}

	my $alt_cmd = "";
	if(has_command('alternatives')){        #CentOS
			$alt_cmd = 'alternatives';
	}elsif(has_command('update-alternatives')){     #ubuntu
			$alt_cmd = 'update-alternatives';
	}else{
			print "Warning: No alternatives command found<br>";
	}

	if($alt_cmd ne ""){
		print "Removing Java using $alt_cmd<br>";
		my @jdk_progs = ('java', 'jar', 'javac');
		foreach my $prog (@jdk_progs){

			$cmd_out='';
			$cmd_err='';
			local $out = &execute_command("$alt_cmd --remove $prog $jdk_dir/bin/$prog", undef, \$cmd_out, \$cmd_err, 0, 0);
			if($cmd_err){
				&error("Error: $alt_cmd: $cmd_err");
			}else{
				$cmd_out = s/\r\n/<br>/g;
				print &html_escape($cmd_out);
			}
		}
	}
}

sub get_jdk_dir_by_name{
	my $jdk_name = $_[0];
	my $jdk_dir = '';

	if($jdk_name =~ /.*openjdk.*/){

		my $jdk_ver = (split /-/, $jdk_name)[1];	#get version from name
		my @known_dirs = ('java-'.$jdk_ver.'-openjdk', 'java-'.$jdk_ver.'-openjdk-amd64', 'jre-'.$jdk_ver.'-openjdk');

		foreach $jvm_name (@known_dirs){
			if(-d '/usr/lib/jvm/'.$jvm_name){
				$jdk_dir = '/usr/lib/jvm/'.$jvm_name;
				last;
			}
		}

	}else{
		$jdk_dir = '/usr/java/'.$jdk_name;
	}
	return $jdk_dir;
}

1;