handle some cases for existing scoped relationships etc.

[scpubgit/stemmatology.git] / lib / Text / Tradition / Collation / RelationshipStore.pm

diff --git a/lib/Text/Tradition/Collation/RelationshipStore.pm b/lib/Text/Tradition/Collation/RelationshipStore.pm
index 3328b96..0f48552 100644 (file)
--- a/lib/Text/Tradition/Collation/RelationshipStore.pm
+++ b/lib/Text/Tradition/Collation/RelationshipStore.pm
@@ -86,24 +86,9 @@ has 'graph' => (
        relationships => 'edges',
        add_reading => 'add_vertex',
        delete_reading => 'delete_vertex',
-       delete_relationship => 'delete_edge',
     },
        );
        
-around 'delete_relationship' => sub {
-       my $orig = shift;
-       my $self = shift;
-       my @vector;
-       if( @_ == 1 && ref( $_[0] ) eq 'ARRAY' ) {
-               # Dereference the edge arrayref that was passed.
-               my $edge = shift;
-               @vector = @$edge;
-       } else {
-               @vector = @_;
-       }
-       return $self->$orig( @vector );
-};
-       
 =head2 get_relationship
 
 Return the relationship object, if any, that exists between two readings.
@@ -123,7 +108,7 @@ sub get_relationship {
        my $relationship;
        if( $self->graph->has_edge_attribute( @vector, 'object' ) ) {
                $relationship = $self->graph->get_edge_attribute( @vector, 'object' );
-       }
+       } 
        return $relationship;
 }
 
@@ -133,11 +118,6 @@ sub _set_relationship {
        $self->graph->set_edge_attribute( @vector, 'object', $relationship );
 }
 
-sub _remove_relationship {
-       my( $self, @vector ) = @_;
-       $self->graph->delete_edge( @vector );
-}
-       
 =head2 create
 
 Create a new relationship with the given options and return it.
@@ -228,25 +208,41 @@ add_relationship.
 sub add_relationship {
        my( $self, $source, $source_rdg, $target, $target_rdg, $options ) = @_;
 
-       # Check the options
-       $options->{'scope'} = 'local' unless $options->{'scope'};
-       
-       my( $is_valid, $reason ) = 
-               $self->relationship_valid( $source, $target, $options->{'type'} );
-    unless( $is_valid ) {
-        throw( "Invalid relationship: $reason" );
+       my $relationship;
+       my $thispaironly;
+       if( ref( $options ) eq 'Text::Tradition::Collation::Relationship' ) {
+               $relationship = $options;
+               $thispaironly = 1;  # If existing rel, set only where asked.
+       } else {
+               # Check the options
+               $options->{'scope'} = 'local' unless $options->{'scope'};
+               
+               my( $is_valid, $reason ) = 
+                       $self->relationship_valid( $source, $target, $options->{'type'} );
+               unless( $is_valid ) {
+                       throw( "Invalid relationship: $reason" );
+               }
+               
+               # Try to create the relationship object.
+               $options->{'reading_a'} = $source_rdg->text;
+               $options->{'reading_b'} = $target_rdg->text;
+               $options->{'orig_a'} = $source;
+               $options->{'orig_b'} = $target;
+               $relationship = $self->create( $options );  # Will throw on error
     }
-    
-    # Try to create the relationship object.
-    $options->{'reading_a'} = $source_rdg->text;
-    $options->{'reading_b'} = $target_rdg->text;
-    $options->{'orig_a'} = $source;
-    $options->{'orig_b'} = $target;
-    my $relationship = $self->create( $options );  # Will throw on error
+
 
        # Find all the pairs for which we need to set the relationship.
        my @vectors = ( [ $source, $target ] ); 
-    if( $relationship->colocated && $relationship->nonlocal ) {
+    if( $relationship->colocated && $relationship->nonlocal && !$thispaironly ) {
+       # Is there a relationship with this a & b already?
+       my $otherrel = $self->scoped_relationship( $relationship->reading_a, 
+               $relationship->reading_b );
+       if( $otherrel && $otherrel->type eq $relationship->type 
+               && $otherrel->scope eq $relationship->scope ) {
+               warn "Applying existing scoped relationship";
+               $relationship = $otherrel;
+       }
        my $c = $self->collation;
        # Set the same relationship everywhere we can, throughout the graph.
        my @identical_readings = grep { $_->text eq $relationship->reading_a }
@@ -271,8 +267,9 @@ sub add_relationship {
     my @pairs_set;
     foreach my $v ( @vectors ) {
                my $rel = $self->get_relationship( @$v );
-       if( $rel ) {
+       if( $rel && $rel ne $relationship ) {
                if( $rel->nonlocal ) {
+                       $DB::single = 1;
                        throw( "Found conflicting relationship at @$v" );
                } else {
                        warn "Not overriding local relationship set at @$v";
@@ -311,6 +308,11 @@ sub del_relationship {
        return @vectors;
 }
 
+sub _remove_relationship {
+       my( $self, @vector ) = @_;
+       $self->graph->delete_edge( @vector );
+}
+       
 =head2 relationship_valid( $source, $target, $type )
 
 Checks whether a relationship of type $type may exist between the readings given