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#
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# ScramProjectDB.pm - Keep a track of available projects
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#
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# Originally Written by Christopher Williams
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#
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# Description
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# -----------
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# Stores project area information
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#
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# Interface
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# ---------
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# new(dbfile) : A new dbobject object
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# file() : return the db file
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# getarea(name,version) : return the object matching the name version
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# addarea(ConfigArea) : add a project - return 0 for success 1 for abort
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# list() : list local areas (retunns $name,$version pairs)
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# listall() : list local and linked areas
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# listlinks() : Show a list of links
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# removearea(name,version) : remove the named project
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# link(dblocation) : link with specified db
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# unlink(dblocation) : remove link with a specified db
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package Scram::ScramProjectDB;
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use Utilities::Verbose;
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require 5.004;
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@ISA=qw(Utilities::Verbose);
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sub new {
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my $class=shift;
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my $self={};
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bless $self, $class;
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$self->{dbfile}=shift;
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$self->_readdbfile($self->{dbfile});
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$self->{projectobjects}={};
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return $self;
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}
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sub file {
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my $self=shift;
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return $self->{dbfile};
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}
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sub getarea {
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my $self=shift;
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my $name=shift;
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my $version=shift;
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my $area=undef;
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my $index=$self->_findlocal($name,$version);
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if ( $index != -1 ) {
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my $location=$self->{projects}[$index][3];
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if ( defined $self->{projectobjects}{$location} ) {
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$area=$self->{projectobjects}{$location};
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}
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else {
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$area=Configuration::ConfigArea->new();
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$self->verbose("Attempt to ressurect $name $version from $location");
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if ( $area->bootstrapfromlocation($location) == 1 ) {
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undef $area;
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$self->verbose("attempt unsuccessful");
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}
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else {
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$self->verbose("area found");
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$self->{projectobjects}{$location}=$area;
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}
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}
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}
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else {
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# -- search in linked databases
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foreach $db ( @{$self->{linkeddbs}} ) {
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$self->verbose("Searching in $db->file() for $name $version");
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$area=$db->getarea($name,$version);
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last if (defined $area);
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}
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}
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if ( ! defined $area ) {
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$self->verbose("Area $name $version not found");
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}
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return $area;
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}
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sub addarea {
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my $self=shift;
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my $name=shift;
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my $version=shift;
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my $area=shift;
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my $rv=1;
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#my $type="_location"; not ready for this yet
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my $type="file";
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my $url=$area->location()."/.SCRAM/InstallFile";
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# -- check for duplicates
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for ( my $index=0; $index<=$#{$self->{projects}}; $index++ ) {
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if ( $self->{projects}[$index][0] eq $name ) {
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if ( $self->{projects}[$index][1] eq $version ) {
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print "$name $version alreay exists. Overwrite (y/n)\n";
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if ( ! (<STDIN>=~/y/i ) ) {
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print "Aborting install ...\n";
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return 1;
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}
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else {
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$rv=0;
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$self->{projects}[$index]=[ ($name,$version,$type,$url) ];
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}
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}
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else {
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print "Related Project : $name ".$self->{projects}[$index][1]."\n";
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}
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}
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}
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if ( $rv ) {
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# -- add to our list and save
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push @{$self->{projects}}, [ ($name,$version,$type,$url) ];
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}
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$self->_save();
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return 0;
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}
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sub listlinks {
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my $self=shift;
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my @dbfile=();
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foreach $db ( @{$self->{linkeddbs}} ) {
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push @dbfile, $db->file();
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}
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return @dbfile;
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}
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sub list {
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my $self=shift;
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return @{$self->{projects}};
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}
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sub listall {
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my $self=shift;
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my @list=$self->list();
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foreach $db ( @{$self->{linkeddbs}} ) {
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$self->verbose("Adding list from $db");
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push @list, $db->listall();
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}
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return @list;
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}
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sub removearea {
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my $self=shift;
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my $name=shift;
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my $version=shift;
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print "Not yet implemented\n";
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}
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sub link {
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my $self=shift;
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my $dbfile=shift;
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my $newdb=Scram::ScramProjectDB->new($dbfile);
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push @{$self->{linkeddbs}},$newdb;
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$self->_save();
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}
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sub unlink {
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my $self=shift;
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my $file=shift;
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my $db;
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for (my $i=0; $i<=$#{$self->{linkeddbs}}; $i++ ) {
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$db=${$self->{linkeddbs}}[$i];
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if ( $db->file() eq $file ) {
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$self->verbose("Removing link $file");
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splice (@{$self->{linkeddbs}},$i,1);
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$self->_save();
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}
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}
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}
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# -- Support Routines
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#
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# Search through the project list until we get a match
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sub _findlocal {
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my $self=shift;
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my $name=shift;
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my $version=shift;
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my $found=-1;
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for (my $i=0; $i<=$#{$self->{projects}}; $i++ ) {
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if ( ( $self->{projects}[$i][0] eq $name) &&
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( $self->{projects}[$i][1] eq $version) ) {
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$found=$i;
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last;
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}
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}
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return $found;
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}
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sub _save {
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my $self=shift;
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use FileHandle;
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my $fh=FileHandle->new();
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my $filename=$self->{dbfile};
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open ( $fh, ">$filename" );
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# print current links
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foreach $db ( @{$self->{linkeddbs}} ) {
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print $fh "\!DB ".$db->file()."\n";
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}
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# save project info
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my $temp;
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foreach $elem ( @{$self->{projects}} ) {
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$temp=join ":", @{$elem};
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print $fh $temp."\n";
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}
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undef $fh;
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}
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sub _readdbfile {
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my $self=shift;
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my $file=shift;
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use FileHandle;
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my $fh=FileHandle->new();
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$self->verbose("Initialising db from $file");
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open ( $fh, "<$file" );
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my @vars;
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my $newdb;
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while ( $map=<$fh> ) {
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chomp $map;
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if ( $map=~/^\!DB (.*)/ ) { # Check for other DB files
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my $db=$1;
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if ( -f $db ) {
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$self->verbose("Getting Linked DB $db");
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$newdb=Scram::ScramProjectDB->new($db);
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push @{$self->{linkeddbs}},$newdb;
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}
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next;
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}
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@vars = split ":", $map;
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$self->verbose("registering project $map");
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push @{$self->{projects}}, [ @vars ];
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}
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undef $fh;
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}
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