use Benchmark;
use Encode qw/ encode_utf8 /;
use Exporter 'import';
+use Graph;
use JSON qw/ encode_json decode_json /;
use LWP::UserAgent;
use Text::Tradition;
=item * merge_types - Specify a list of relationship types, where related readings
should be treated as identical for the purposes of analysis.
+=item * exclude_type1 - Exclude those ranks whose groupings have only type-1 variants.
+
=back
=begin testing
);
my $data = run_analysis( $tradition );
+my $c = $tradition->collation;
foreach my $row ( @{$data->{'variants'}} ) {
# Account for rows that used to be "not useful"
unless( exists $expected_genealogical{$row->{'id'}} ) {
}
is( $row->{'genealogical'}, $expected_genealogical{$row->{'id'}},
"Got correct genealogical flag for row " . $row->{'id'} );
+ # Check that we have the right row with the right groups
+ my $rank = $row->{'id'};
+ foreach my $rdghash ( @{$row->{'readings'}} ) {
+ # Skip 'readings' that aren't really
+ next unless $c->reading( $rdghash->{'readingid'} );
+ # Check the rank
+ is( $c->reading( $rdghash->{'readingid'} )->rank, $rank,
+ "Got correct reading rank" );
+ # Check the witnesses
+ my @realwits = sort $c->reading_witnesses( $rdghash->{'readingid'} );
+ my @sgrp = sort @{$rdghash->{'group'}};
+ is_deeply( \@sgrp, \@realwits, "Reading analyzed with correct groups" );
+ }
}
-is( $data->{'conflict_count'}, 34, "Got right conflict count" );
is( $data->{'variant_count'}, 58, "Got right total variant number" );
+# TODO Make something meaningful of conflict count, maybe test other bits
=end testing
my $c = $tradition->collation;
my $stemma_id = $opts{'stemma_id'} || 0;
- my @ranks = @{$opts{'ranks'}} if ref( $opts{'ranks'} ) eq 'ARRAY';
- my @collapse = @{$opts{'merge_types'}} if ref( $opts{'merge_types'} ) eq 'ARRAY';
+ my @ranks = ref( $opts{'ranks'} ) eq 'ARRAY' ? @{$opts{'ranks'}} : ();
+ my @collapse = ref( $opts{'merge_types'} ) eq 'ARRAY' ? @{$opts{'merge_types'}} : ();
# Get the stemma
my $stemma = $tradition->stemma( $stemma_id );
+
# Figure out which witnesses we are working with
my @lacunose = $stemma->hypotheticals;
my @tradition_wits = map { $_->sigil } $tradition->witnesses;
- map { push( @tradition_wits, $_->sigil."_ac" ) if $_->is_layered }
+ map { push( @tradition_wits, $_->sigil.$c->ac_label ) if $_->is_layered }
$tradition->witnesses;
push( @lacunose, _symmdiff( [ $stemma->witnesses ], \@tradition_wits ) );
# Group the variants to send to the solver
my @groups;
+ my @use_ranks;
my %lacunae;
foreach my $rank ( @ranks ) {
my $missing = [ @lacunose ];
- push( @groups, group_variants( $tradition, $rank, $missing, \@collapse ) );
+ my $rankgroup = group_variants( $tradition, $rank, $missing, \@collapse );
+ if( $opts{'exclude_type1'} ) {
+ # Check to see whether this is a "useful" group.
+ my( $rdgs, $grps ) = _useful_variant( $rankgroup,
+ $stemma->graph, $c->ac_label );
+ next unless @$rdgs;
+ }
+ push( @use_ranks, $rank );
+ push( @groups, $rankgroup );
$lacunae{$rank} = $missing;
}
-
# Parse the answer
- my $answer = solve_variants( $stemma->editable( ' ' ), @groups );
+ my $answer = solve_variants( $stemma, @groups );
# Do further analysis on the answer
my $conflict_count = 0;
- foreach my $idx ( 0 .. $#ranks ) {
+ my $aclabel = $c->ac_label;
+ foreach my $idx ( 0 .. $#use_ranks ) {
my $location = $answer->{'variants'}->[$idx];
# Add the rank back in
- $location->{'id'} = $ranks[$idx];
- # Add the lacunae back in
- $location->{'missing'} = $lacunae{$ranks[$idx]};
+ $location->{'id'} = $use_ranks[$idx];
+ # Note what our lacunae are
+ my %lmiss;
+ map { $lmiss{$_} = 1 } @{$lacunae{$use_ranks[$idx]}};
+ # Run through the reading groups and add as 'lacunae' any redundant
+ # a.c. witnesses (yes, we have to do this before the analysis, thus
+ # identical loops before and after. Boo.)
+ # TODO Consider making these callbacks to analyze_location
+ foreach my $rdghash ( @{$location->{'readings'}} ) {
+ my %rwits;
+ map { $rwits{$_} = 1 } @{$rdghash->{'group'}};
+ foreach my $rw ( keys %rwits ) {
+ if( $rw =~ /^(.*)\Q$aclabel\E$/ ) {
+ if( exists $rwits{$1} ) {
+ $lmiss{$rw} = 1;
+ delete $rwits{$rw};
+ }
+ }
+ }
+ $rdghash->{'group'} = [ keys %rwits ];
+ }
+ $location->{'missing'} = [ keys %lmiss ];
+
# Run the extra analysis we need.
analyze_location( $tradition, $stemma->graph, $location );
- # Add the reading text back in
+
+ # Do the final post-analysis tidying up of the data.
foreach my $rdghash ( @{$location->{'readings'}} ) {
$conflict_count++
if exists $rdghash->{'conflict'} && $rdghash->{'conflict'};
+ # Add the reading text back in
my $rdg = $c->reading( $rdghash->{'readingid'} );
$rdghash->{'text'} = $rdg ? $rdg->text : $rdghash->{'readingid'};
+ # Remove lacunose witnesses from this reading's list now that the
+ # analysis is done
+ my @realgroup;
+ map { push( @realgroup, $_ ) unless $lmiss{$_} } @{$rdghash->{'group'}};
+ $rdghash->{'group'} = \@realgroup;
+ # TODO Record hypotheticals used to create group, if we end up
+ # needing it
}
}
$answer->{'conflict_count'} = $conflict_count;
be a reference to an array, to which the sigla of lacunose witnesses at this
rank will be appended.
-Returns two ordered lists $readings, $groups, where $readings->[$n] is attested
-by the witnesses listed in $groups->[$n].
+Returns a hash $group_readings where $rdg is attested by the witnesses listed
+in $group_readings->{$rdg}.
=cut
sub group_variants {
my( $tradition, $rank, $lacunose, $collapse ) = @_;
my $c = $tradition->collation;
- my $aclabel = $c->ac_label;
+ my $aclabel = $c->ac_label;
# Get the alignment table readings
my %readings_at_rank;
+ my %is_lacunose; # lookup table for $lacunose
+ map { $is_lacunose{$_} = 1 } @$lacunose;
my @gap_wits;
- foreach my $tablewit ( @{$tradition->collation->alignment_table->{'alignment'}} ) {
+ foreach my $tablewit ( @{$c->alignment_table->{'alignment'}} ) {
my $rdg = $tablewit->{'tokens'}->[$rank-1];
my $wit = $tablewit->{'witness'};
- $wit =~ s/^(.*)\Q$aclabel\E$/${1}_ac/;
+ # Exclude the witness if it is "lacunose" which if we got here
+ # means "not in the stemma".
+ next if $is_lacunose{$wit};
if( $rdg && $rdg->{'t'}->is_lacuna ) {
- _add_to_witlist( $wit, $lacunose, '_ac' );
+ _add_to_witlist( $wit, $lacunose, $aclabel );
} elsif( $rdg ) {
$readings_at_rank{$rdg->{'t'}->text} = $rdg->{'t'};
} else {
- _add_to_witlist( $wit, \@gap_wits, '_ac' );
+ _add_to_witlist( $wit, \@gap_wits, $aclabel );
}
}
# Group the readings, collapsing groups by relationship if needed
my %grouped_readings;
- foreach my $rdg ( sort { $b->witnesses <=> $a->witnesses } values %readings_at_rank ) {
+ foreach my $rdg ( sort { $b->witnesses <=> $a->witnesses }
+ values %readings_at_rank ) {
# Skip readings that have been collapsed into others.
next if exists $grouped_readings{$rdg->id} && !$grouped_readings{$rdg->id};
my @wits = $rdg->witnesses;
- map { s/\Q$aclabel\E$/_ac/ } @wits;
if( $collapse ) {
my $filter = sub { my $r = $_[0]; grep { $_ eq $r->type } @$collapse; };
foreach my $other ( $rdg->related_readings( $filter ) ) {
my @otherwits = $other->witnesses;
- map { s/\Q$aclabel\E$/_ac/ } @otherwits;
push( @wits, @otherwits );
$grouped_readings{$other->id} = 0;
}
}
- $grouped_readings{$rdg->id} = \@wits;
+ my @use_wits = grep { !$is_lacunose{$_} } @wits;
+ $grouped_readings{$rdg->id} = \@use_wits;
}
$grouped_readings{'(omitted)'} = \@gap_wits if @gap_wits;
# Get rid of our collapsed readings
=cut
sub solve_variants {
- my( $graph, @groups ) = @_;
+ my( $stemma, @groups ) = @_;
# Make the json with stemma + groups
- my $jsonstruct = { 'graph' => $graph, 'groupings' => [] };
+ my $groupings = [];
foreach my $ghash ( @groups ) {
my @grouping;
foreach my $k ( sort keys %$ghash ) {
push( @grouping, $ghash->{$k} );
}
- push( @{$jsonstruct->{'groupings'}}, \@grouping );
+ push( @$groupings, \@grouping );
}
- my $json = encode_json( $jsonstruct );
+ ## Witness map is a HACK to get around limitations in node names from IDP
+ my $witness_map = {};
+ my $json = encode_json( _safe_wit_strings( $stemma, $groupings, $witness_map ) );
# Send it off and get the result
my $solver_url = 'http://byzantini.st/cgi-bin/graphcalc.cgi';
'Content' => $json );
my $answer;
+ my $used_idp;
if( $resp->is_success ) {
- $answer = decode_json( $resp->content );
+ $answer = _desanitize_names( decode_json( $resp->content ), $witness_map );
+ $used_idp = 1;
} else {
# Fall back to the old method.
warn "IDP solver returned " . $resp->status_line . " / " . $resp->content
. "; falling back to perl method";
- $answer = perl_solver( $graph, @groups );
+ $answer = perl_solver( $stemma, @$groupings );
}
# Fold the result back into what we know about the groups.
my $genealogical = 0;
foreach my $idx ( 0 .. $#groups ) {
my( $calc_groups, $result ) = @{$answer->[$idx]};
- $genealogical++ if $result;
+ if( $result ) {
+ $genealogical++;
+ # Prune the calculated groups, in case the IDP solver failed to.
+ if( $used_idp ) {
+ my @pruned_groups;
+ foreach my $cg ( @$calc_groups ) {
+ my @pg = _prune_group( $cg, $stemma );
+ push( @pruned_groups, \@pg );
+ }
+ $calc_groups = \@pruned_groups;
+ }
+ }
my $input_group = $groups[$idx];
foreach my $k ( sort keys %$input_group ) {
my $cg = shift @$calc_groups;
'genealogical' => $result,
'readings' => [],
};
- foreach my $k ( keys %$input_group ) {
+ foreach my $k ( sort { @{$input_group->{$b}} <=> @{$input_group->{$a}} }
+ keys %$input_group ) {
push( @{$vstruct->{'readings'}},
{ 'readingid' => $k, 'group' => $input_group->{$k}} );
}
'genealogical_count' => $genealogical };
}
+#### HACKERY to cope with IDP's limited idea of what a node name looks like ###
+
+sub _safe_wit_strings {
+ my( $stemma, $groupings, $witness_map ) = @_;
+ my $safegraph = Graph->new();
+ # Convert the graph to a safe representation and store the conversion.
+ foreach my $n ( $stemma->graph->vertices ) {
+ my $sn = _safe_witstr( $n );
+ warn "Ambiguous stringification $sn for $n and " . $witness_map->{$sn}
+ if exists $witness_map->{$sn};
+ $witness_map->{$sn} = $n;
+ $safegraph->add_vertex( $sn );
+ $safegraph->set_vertex_attributes( $sn,
+ $stemma->graph->get_vertex_attributes( $n ) );
+ }
+ foreach my $e ( $stemma->graph->edges ) {
+ my @safe_e = ( _safe_witstr( $e->[0] ), _safe_witstr( $e->[1] ) );
+ $safegraph->add_edge( @safe_e );
+ }
+ my $safe_stemma = Text::Tradition::Stemma->new(
+ 'collation' => $stemma->collation, 'graph' => $safegraph );
+
+ # Now convert the witness groupings to a safe representation.
+ my $safe_groupings = [];
+ foreach my $grouping ( @$groupings ) {
+ my $safe_grouping = [];
+ foreach my $group ( @$grouping ) {
+ my $safe_group = [];
+ foreach my $n ( @$group ) {
+ my $sn = _safe_witstr( $n );
+ warn "Ambiguous stringification $sn for $n and " . $witness_map->{$sn}
+ if exists $witness_map->{$sn} && $witness_map->{$sn} ne $n;
+ $witness_map->{$sn} = $n;
+ push( @$safe_group, $sn );
+ }
+ push( @$safe_grouping, $safe_group );
+ }
+ push( @$safe_groupings, $safe_grouping );
+ }
+
+ # Return it all in the struct we expect. We have stored the reductions
+ # in the $witness_map that we were passed.
+ return { 'graph' => $safe_stemma->editable( ' ' ), 'groupings' => $safe_groupings };
+}
+
+sub _safe_witstr {
+ my $witstr = shift;
+ $witstr =~ s/\s+/_/g;
+ $witstr =~ s/[^\w\d-]//g;
+ return $witstr;
+}
+
+sub _desanitize_names {
+ my( $jsonstruct, $witness_map ) = @_;
+ my $result = [];
+ foreach my $grouping ( @$jsonstruct ) {
+ my $real_grouping = [];
+ foreach my $element ( @$grouping ) {
+ if( ref( $element ) eq 'ARRAY' ) {
+ # it's the groupset.
+ my $real_groupset = [];
+ foreach my $group ( @$element ) {
+ my $real_group = [];
+ foreach my $n ( @$group ) {
+ my $rn = $witness_map->{$n};
+ push( @$real_group, $rn );
+ }
+ push( @$real_groupset, $real_group );
+ }
+ push( @$real_grouping, $real_groupset );
+ } else {
+ # It is the boolean, not actually a group.
+ push( @$real_grouping, $element );
+ }
+ }
+ push( @$result, $real_grouping );
+ }
+ return $result;
+}
+
+### END HACKERY ###
+
=head2 analyze_location ( $tradition, $graph, $location_hash )
Given the tradition, its stemma graph, and the solution from the graph solver,
=cut
sub perl_solver {
- my( $graph, @groups ) = @_;
-
- warn "Not implemented yet";
- return [];
+ my( $stemma, @groups ) = @_;
+ my $graph = $stemma->graph;
+ my @answer;
+ foreach my $g ( @groups ) {
+ push( @answer, _solve_variant_location( $graph, $g ) );
+ }
+ return \@answer;
}
+sub _solve_variant_location {
+ my( $graph, $groups ) = @_;
# Now do the work.
-# my $contig = {};
-# my $subgraph = {};
-# my $is_conflicted;
-# my $conflict = {};
-# my %reading_roots;
-# my $variant_row = { 'id' => $rank, 'readings' => [] };
-# # Mark each ms as in its own group, first.
-# foreach my $g ( @$groups ) {
-# my $gst = wit_stringify( $g );
-# map { $contig->{$_} = $gst } @$g;
-# }
-# # Now for each unmarked node in the graph, initialize an array
-# # for possible group memberships. We will use this later to
-# # resolve potential conflicts.
-# map { $contig->{$_} = [] unless $contig->{$_} } $graph->vertices;
-# foreach my $g ( sort { scalar @$b <=> scalar @$a } @$groups ) {
-# my $gst = wit_stringify( $g ); # This is the group name
-# # Copy the graph, and delete all non-members from the new graph.
-# my $part = $graph->copy;
-# my @group_roots;
-# $part->delete_vertices(
-# grep { !ref( $contig->{$_} ) && $contig->{$_} ne $gst } $graph->vertices );
-#
-# # Now look to see if our group is connected.
-# if( $undirected ) { # For use with distance trees etc.
-# # Find all vertices reachable from the first (arbitrary) group
-# # member. If we are genealogical this should include them all.
-# my $reachable = {};
-# map { $reachable->{$_} = 1 } $part->all_reachable( $g->[0] );
-# # TODO This is a terrible way to do distance trees, since all
-# # non-leaf nodes are included in every graph part now. We may
-# # have to go back to SPDP.
-# } else {
-# if( @$g > 1 ) {
-# # We have to take directionality into account.
-# # How many root nodes do we have?
-# my @roots = grep { ref( $contig->{$_} ) || $contig->{$_} eq $gst }
-# $part->predecessorless_vertices;
-# # Assuming that @$g > 1, find the first root node that has at
-# # least one successor belonging to our group. If this reading
-# # is genealogical, there should be only one, but we will check
-# # that implicitly later.
-# foreach my $root ( @roots ) {
-# # Prune the tree to get rid of extraneous hypotheticals.
-# $root = _prune_subtree( $part, $root, $contig );
-# next unless $root;
-# # Save this root for our group.
-# push( @group_roots, $root );
-# # Get all the successor nodes of our root.
-# }
-# } else {
-# # Dispense with the trivial case of one reading.
-# my $wit = pop @$g;
-# @group_roots = ( $wit );
-# foreach my $v ( $part->vertices ) {
-# $part->delete_vertex( $v ) unless $v eq $wit;
-# }
-# }
-# }
-#
-# map { $reading_roots{$_} = 1 } @group_roots;
-# if( @group_roots > 1 ) {
-# $conflict->{$group_readings->{$gst}} = 1;
-# $is_conflicted = 1;
-# }
-# # Paint the 'hypotheticals' with our group.
-# foreach my $wit ( $part->vertices ) {
-# if( ref( $contig->{$wit} ) ) {
-# push( @{$contig->{$wit}}, $gst );
-# } elsif( $contig->{$wit} ne $gst ) {
-# warn "How did we get here?";
-# }
-# }
-#
-#
-# # Start to write the reading, and save the group subgraph.
-# my $reading = { 'readingid' => $group_readings->{$gst},
-# 'missing' => wit_stringify( \@lacunose ),
-# 'group' => $gst }; # This will change if we find no conflict
-# # Save the relevant subgraph.
-# $subgraph->{$gst} = $part;
-# push( @{$variant_row->{'readings'}}, $reading );
-# }
-#
-# # For each of our hypothetical readings, flatten its 'contig' array if
-# # the array contains zero or one group. If we have any unflattened arrays,
-# # we may need to run the resolution process. If the reading is already known
-# # to have a conflict, flatten the 'contig' array to nothing; we won't resolve
-# # it.
-# my @resolve;
-# foreach my $wit ( keys %$contig ) {
-# next unless ref( $contig->{$wit} );
-# if( @{$contig->{$wit}} > 1 ) {
-# if( $is_conflicted ) {
-# $contig->{$wit} = ''; # We aren't going to decide.
-# } else {
-# push( @resolve, $wit );
-# }
-# } else {
-# my $gst = pop @{$contig->{$wit}};
-# $contig->{$wit} = $gst || '';
-# }
-# }
-#
-# if( @resolve ) {
-# my $still_contig = {};
-# foreach my $h ( @resolve ) {
-# # For each of the hypothetical readings with more than one possibility,
-# # try deleting it from each of its member subgraphs in turn, and see
-# # if that breaks the contiguous grouping.
-# # TODO This can still break in a corner case where group A can use
-# # either vertex 1 or 2, and group B can use either vertex 2 or 1.
-# # Revisit this if necessary; it could get brute-force nasty.
-# foreach my $gst ( @{$contig->{$h}} ) {
-# my $gpart = $subgraph->{$gst}->copy();
-# # If we have come this far, there is only one root and everything
-# # is reachable from it.
-# my( $root ) = $gpart->predecessorless_vertices;
-# my $reachable = {};
-# map { $reachable->{$_} = 1 } $gpart->vertices;
-#
-# # Try deleting the hypothetical node.
-# $gpart->delete_vertex( $h );
-# if( $h eq $root ) {
-# # See if we still have a single root.
-# my @roots = $gpart->predecessorless_vertices;
-# warn "This shouldn't have happened" unless @roots;
-# if( @roots > 1 ) {
-# # $h is needed by this group.
-# if( exists( $still_contig->{$h} ) ) {
-# # Conflict!
-# $conflict->{$group_readings->{$gst}} = 1;
-# $still_contig->{$h} = '';
-# } else {
-# $still_contig->{$h} = $gst;
-# }
-# }
-# } else {
-# # $h is somewhere in the middle. See if everything
-# # else can still be reached from the root.
-# my %still_reachable = ( $root => 1 );
-# map { $still_reachable{$_} = 1 }
-# $gpart->all_successors( $root );
-# foreach my $v ( keys %$reachable ) {
-# next if $v eq $h;
-# if( !$still_reachable{$v}
-# && ( $contig->{$v} eq $gst
-# || ( exists $still_contig->{$v}
-# && $still_contig->{$v} eq $gst ) ) ) {
-# # We need $h.
-# if( exists $still_contig->{$h} ) {
-# # Conflict!
-# $conflict->{$group_readings->{$gst}} = 1;
-# $still_contig->{$h} = '';
-# } else {
-# $still_contig->{$h} = $gst;
-# }
-# last;
-# } # else we don't need $h in this group.
-# } # end foreach $v
-# } # endif $h eq $root
-# } # end foreach $gst
-# } # end foreach $h
-#
-# # Now we have some hypothetical vertices in $still_contig that are the
-# # "real" group memberships. Replace these in $contig.
-# foreach my $v ( keys %$contig ) {
-# next unless ref $contig->{$v};
-# $contig->{$v} = $still_contig->{$v};
-# }
-# } # end if @resolve
-#
-#
-# $variant_row->{'genealogical'} = !( keys %$conflict );
-# return $variant_row;
-# }
+ my $contig = {};
+ my $subgraph = {};
+ my $is_conflicted;
+ my $conflict = {};
+
+ # Mark each ms as in its own group, first.
+ foreach my $g ( @$groups ) {
+ my $gst = wit_stringify( $g );
+ map { $contig->{$_} = $gst } @$g;
+ }
+
+ # Now for each unmarked node in the graph, initialize an array
+ # for possible group memberships. We will use this later to
+ # resolve potential conflicts.
+ map { $contig->{$_} = [] unless $contig->{$_} } $graph->vertices;
+ foreach my $g ( sort { scalar @$b <=> scalar @$a } @$groups ) {
+ my $gst = wit_stringify( $g ); # This is the group name
+ # Copy the graph, and delete all non-members from the new graph.
+ my $part = $graph->copy;
+ my @group_roots;
+ $part->delete_vertices(
+ grep { !ref( $contig->{$_} ) && $contig->{$_} ne $gst } $graph->vertices );
+
+ # Now look to see if our group is connected.
+ if( @$g > 1 ) {
+ # We have to take directionality into account.
+ # How many root nodes do we have?
+ my @roots = grep { ref( $contig->{$_} ) || $contig->{$_} eq $gst }
+ $part->predecessorless_vertices;
+ # Assuming that @$g > 1, find the first root node that has at
+ # least one successor belonging to our group. If this reading
+ # is genealogical, there should be only one, but we will check
+ # that implicitly later.
+ foreach my $root ( @roots ) {
+ # Prune the tree to get rid of extraneous hypotheticals.
+ $root = _prune_subtree( $part, $root, $contig );
+ next unless $root;
+ # Save this root for our group.
+ push( @group_roots, $root );
+ # Get all the successor nodes of our root.
+ }
+ } else {
+ # Dispense with the trivial case of one reading.
+ my $wit = $g->[0];
+ @group_roots = ( $wit );
+ foreach my $v ( $part->vertices ) {
+ $part->delete_vertex( $v ) unless $v eq $wit;
+ }
+ }
+
+ if( @group_roots > 1 ) {
+ $conflict->{$gst} = 1;
+ $is_conflicted = 1;
+ }
+ # Paint the 'hypotheticals' with our group.
+ foreach my $wit ( $part->vertices ) {
+ if( ref( $contig->{$wit} ) ) {
+ push( @{$contig->{$wit}}, $gst );
+ } elsif( $contig->{$wit} ne $gst ) {
+ warn "How did we get here?";
+ }
+ }
+
+
+ # Save the relevant subgraph.
+ $subgraph->{$gst} = $part;
+ }
+
+ # For each of our hypothetical readings, flatten its 'contig' array if
+ # the array contains zero or one group. If we have any unflattened arrays,
+ # we may need to run the resolution process. If the reading is already known
+ # to have a conflict, flatten the 'contig' array to nothing; we won't resolve
+ # it.
+ my @resolve;
+ foreach my $wit ( keys %$contig ) {
+ next unless ref( $contig->{$wit} );
+ if( @{$contig->{$wit}} > 1 ) {
+ if( $is_conflicted ) {
+ $contig->{$wit} = ''; # We aren't going to decide.
+ } else {
+ push( @resolve, $wit );
+ }
+ } else {
+ my $gst = pop @{$contig->{$wit}};
+ $contig->{$wit} = $gst || '';
+ }
+ }
+
+ if( @resolve ) {
+ my $still_contig = {};
+ foreach my $h ( @resolve ) {
+ # For each of the hypothetical readings with more than one possibility,
+ # try deleting it from each of its member subgraphs in turn, and see
+ # if that breaks the contiguous grouping.
+ # TODO This can still break in a corner case where group A can use
+ # either vertex 1 or 2, and group B can use either vertex 2 or 1.
+ # Revisit this if necessary; it could get brute-force nasty.
+ foreach my $gst ( @{$contig->{$h}} ) {
+ my $gpart = $subgraph->{$gst}->copy();
+ # If we have come this far, there is only one root and everything
+ # is reachable from it.
+ my( $root ) = $gpart->predecessorless_vertices;
+ my $reachable = {};
+ map { $reachable->{$_} = 1 } $gpart->vertices;
+
+ # Try deleting the hypothetical node.
+ $gpart->delete_vertex( $h );
+ if( $h eq $root ) {
+ # See if we still have a single root.
+ my @roots = $gpart->predecessorless_vertices;
+ warn "This shouldn't have happened" unless @roots;
+ if( @roots > 1 ) {
+ # $h is needed by this group.
+ if( exists( $still_contig->{$h} ) ) {
+ # Conflict!
+ $conflict->{$gst} = 1;
+ $still_contig->{$h} = '';
+ } else {
+ $still_contig->{$h} = $gst;
+ }
+ }
+ } else {
+ # $h is somewhere in the middle. See if everything
+ # else can still be reached from the root.
+ my %still_reachable = ( $root => 1 );
+ map { $still_reachable{$_} = 1 }
+ $gpart->all_successors( $root );
+ foreach my $v ( keys %$reachable ) {
+ next if $v eq $h;
+ if( !$still_reachable{$v}
+ && ( $contig->{$v} eq $gst
+ || ( exists $still_contig->{$v}
+ && $still_contig->{$v} eq $gst ) ) ) {
+ # We need $h.
+ if( exists $still_contig->{$h} ) {
+ # Conflict!
+ $conflict->{$gst} = 1;
+ $still_contig->{$h} = '';
+ } else {
+ $still_contig->{$h} = $gst;
+ }
+ last;
+ } # else we don't need $h in this group.
+ } # end foreach $v
+ } # endif $h eq $root
+ } # end foreach $gst
+ } # end foreach $h
+
+ # Now we have some hypothetical vertices in $still_contig that are the
+ # "real" group memberships. Replace these in $contig.
+ foreach my $v ( keys %$contig ) {
+ next unless ref $contig->{$v};
+ $contig->{$v} = $still_contig->{$v};
+ }
+ } # end if @resolve
+
+ my $is_genealogical = keys %$conflict ? JSON::false : JSON::true;
+ my $variant_row = [ [], $is_genealogical ];
+ # Fill in the groupings from $contig.
+ foreach my $g ( @$groups ) {
+ my $gst = wit_stringify( $g );
+ my @realgroup = grep { $contig->{$_} eq $gst } keys %$contig;
+ push( @{$variant_row->[0]}, \@realgroup );
+ }
+ return $variant_row;
+}
+
+sub _prune_group {
+ my( $group, $stemma ) = @_;
+ # Get these into a form prune_subtree will recognize. Make a "contighash"
+ my $hypohash = {};
+ map { $hypohash->{$_} = 1 } @$group;
+ # ...with reference values for hypotheticals.
+ map { $hypohash->{$_} = [] } $stemma->hypotheticals;
+ # Make our subgraph
+ my $subgraph = $stemma->graph->copy;
+ map { $subgraph->delete_vertex( $_ ) unless exists $hypohash->{$_} }
+ $subgraph->vertices;
+ # ...and find the root.
+ my( $root ) = $subgraph->predecessorless_vertices;
+ # Now prune and return the remaining vertices.
+ _prune_subtree( $subgraph, $root, $hypohash );
+ return $subgraph->vertices;
+}
sub _prune_subtree {
my( $tree, $root, $contighash ) = @_;