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

package Text::Tradition;

use Module::Load;
use Moose;
use Text::Tradition::Collation;
use Text::Tradition::Stemma;
use Text::Tradition::Witness;

use vars qw( $VERSION );
$VERSION = "0.1";

has 'collation' => (
    is => 'ro',
    isa => 'Text::Tradition::Collation',
    writer => '_save_collation',
    );

has 'witness_hash' => (
    traits => ['Hash'],
    isa => 'HashRef[Text::Tradition::Witness]',
    handles => {
        witness     => 'get',
        add_witness => 'set',
        del_witness => 'delete',
        has_witness => 'exists',
        witnesses   => 'values',
    },
    default => sub { {} },
    );

has 'name' => (
    is => 'rw',
    isa => 'Str',
    default => 'Tradition',
    );
    
has 'stemma' => (
	is => 'ro',
	isa => 'Text::Tradition::Stemma',
	writer => '_add_stemma',
	);
  
# Create the witness before trying to add it
around 'add_witness' => sub {
    my $orig = shift;
    my $self = shift;
    # TODO allow add of a Witness object?
    my $new_wit = Text::Tradition::Witness->new( @_ );
    $self->$orig( $new_wit->sigil => $new_wit );
    return $new_wit;
};

# Allow deletion of witness by object as well as by sigil
around 'del_witness' => sub {
    my $orig = shift;
    my $self = shift;
    my @key_args;
    foreach my $arg ( @_ ) {
        push( @key_args, 
              ref( $arg ) eq 'Text::Tradition::Witness' ? $arg->sigil : $arg );
    }
    return $self->$orig( @key_args );
};

# Don't allow an empty hash value
around 'witness' => sub {
    my( $orig, $self, $arg ) = @_;
    return unless $self->has_witness( $arg );
    return $self->$orig( $arg );
};

=head1 NAME

Text::Tradition - a software model for a set of collated texts

=head1 SYNOPSIS

  use Text::Tradition;
  my $t = Text::Tradition->new( 
    'name' => 'this is a text',
    'input' => 'TEI',
    'file' => '/path/to/tei_parallel_seg_file.xml' );

  my @text_wits = $t->witnesses();
  my $manuscript_a = $t->witness( 'A' );
  my $new_ms = $t->add_witness( 'sigil' => 'B' );
  
  my $text_path_svg = $t->collation->as_svg();
  ## See Text::Tradition::Collation for more on text collation itself
    
=head1 DESCRIPTION

Text::Tradition is a library for representation and analysis of collated
texts, particularly medieval ones.  A 'tradition' refers to the aggregation
of surviving versions of a text, generally preserved in multiple
manuscripts (or 'witnesses').  A Tradition object thus has one more more
Witnesses, as well as a Collation that represents the unity of all versions
of the text.

=head1 METHODS

=head2 new

Creates and returns a new text tradition object.  The following options are
accepted.

General options:

=over 4

=item B<name> - The name of the text.

=back

Initialization based on a collation file:

=over 4

=item B<input> - The input format of the collation file.  Can be one of the
following:

=over 4

=item * Self - a GraphML format produced by this module

=item * CollateX - a GraphML format produced by CollateX

=item * CTE - a TEI XML format produced by Classical Text Editor

=item * KUL - a specific CSV format for variants, not documented here

=item * TEI - a TEI parallel segmentation format file

=item * Tabular - a comma- or tab-separated collation.  Takes an additional
option, 'sep_char', which defaults to the tab character.

=back

=item B<file> - The name of the file that contains the data.  One of 'file'
or 'string' should be specified.

=item B<string> - A text string that contains the data.  One of 'file' or
'string' should be specified.

=item B<base> - The name of a text file that contains the base text, to be
used with input formats that require it (currently only KUL).

=back

Initialization based on a list of witnesses [NOT YET IMPLEMENTED]:

=over 4

=item B<witnesses> - A reference to an array of Text::Tradition::Witness
objects that carry the text to be collated.

=item B<collator> - A reference to a collation program that will accept
Witness objects.

=back

=head2 B<witnesses>

Return the Text::Tradition::Witness objects associated with this tradition,
as an array.

=head2 B<witness>( $sigil )

Returns the Text::Tradition::Witness object whose sigil is $sigil, or undef
if there is no such object within the tradition.

=head2 B<add_witness>( %opts )

Instantiate a new witness with the given options (see documentation for
Text::Tradition::Witness) and add it to the tradition.

=head2 B<del_witness>( $sigil )

Delete the witness with the given sigil from the tradition.  Returns the
witness object for the deleted witness.

=begin testing

use_ok( 'Text::Tradition', "can use module" );

my $t = Text::Tradition->new( 'name' => 'empty' );
is( ref( $t ), 'Text::Tradition', "initialized an empty Tradition object" );
is( $t->name, 'empty', "object has the right name" );
is( scalar $t->witnesses, 0, "object has no witnesses" );

my $simple = 't/data/simple.txt';
my $s = Text::Tradition->new( 
    'name'  => 'inline', 
    'input' => 'Tabular',
    'file'  => $simple,
    );
is( ref( $s ), 'Text::Tradition', "initialized a Tradition object" );
is( $s->name, 'inline', "object has the right name" );
is( scalar $s->witnesses, 3, "object has three witnesses" );

my $wit_a = $s->witness('A');
is( ref( $wit_a ), 'Text::Tradition::Witness', "Found a witness A" );
if( $wit_a ) {
    is( $wit_a->sigil, 'A', "Witness A has the right sigil" );
}
is( $s->witness('X'), undef, "There is no witness X" );
ok( !exists $s->{'witnesses'}->{'X'}, "Witness key X not created" );

my $wit_d = $s->add_witness( 'sigil' => 'D' );
is( ref( $wit_d ), 'Text::Tradition::Witness', "new witness created" );
is( $wit_d->sigil, 'D', "witness has correct sigil" );
is( scalar $s->witnesses, 4, "object now has four witnesses" );

my $del = $s->del_witness( 'D' );
is( $del, $wit_d, "Deleted correct witness" );
is( scalar $s->witnesses, 3, "object has three witnesses again" );

# TODO test initialization by witness list when we have it

=end testing

=cut
    

sub BUILD {
    my( $self, $init_args ) = @_;

    if( exists $init_args->{'witnesses'} ) {
        # We got passed an uncollated list of witnesses.  Make a
        # witness object for each witness, and then send them to the
        # collator.
        my $autosigil = 0;
        foreach my $wit ( %{$init_args->{'witnesses'}} ) {
            # Each item in the list is either a string or an arrayref.
            # If it's a string, it is a filename; if it's an arrayref,
            # it is a tuple of 'sigil, file'.  Handle either case.
            my $args;
            if( ref( $wit ) eq 'ARRAY' ) {
                $args = { 'sigil' => $wit->[0],
                          'file' => $wit->[1] };
            } else {
                $args = { 'sigil' => chr( $autosigil+65 ),
                          'file' => $wit };
                $autosigil++;
            }
            $self->witnesses->add_witness( $args );
            # TODO Now how to collate these?
        }
    } else {
        # Else we need to parse some collation data.  Make a Collation object
        my $collation = Text::Tradition::Collation->new( %$init_args,
                                                        'tradition' => $self );
        $self->_save_collation( $collation );

        # Call the appropriate parser on the given data
        my @format_standalone = qw/ Self CollateText CollateX CTE TEI Tabular /;
        my @format_basetext = qw/ KUL /;
        my $use_base;
        my $format = $init_args->{'input'};
        if( $format && !( grep { $_ eq $format } @format_standalone )
            && !( grep { $_ eq $format } @format_basetext ) ) {
            warn "Unrecognized input format $format; not parsing";
            return;
        }
        if( $format && grep { $_ eq $format } @format_basetext ) {
            $use_base = 1;
            if( !exists $init_args->{'base'} ) {
                warn "Cannot make a collation from $format without a base text";
                return;
            }
        }

        # Now do the parsing. 
        if( $format ) {
            if( $use_base ) { 
                $format = 'BaseText';   # Use the BaseText module for parsing,
                                        # but retain the original input arg.
            }
            my $mod = "Text::Tradition::Parser::$format";
            load( $mod );
            $mod->can('parse')->( $self, $init_args );
        }
    }
}

=head2 add_stemma( $dotfile )

Initializes a Text::Tradition::Stemma object from the given dotfile,
and associates it with the tradition.

=begin testing

use Text::Tradition;

my $t = Text::Tradition->new( 
    'name'  => 'simple test', 
    'input' => 'Tabular',
    'file'  => 't/data/simple.txt',
    );

my $s;
ok( $s = $t->add_stemma( 't/data/simple.dot' ), "Added a simple stemma" );
is( ref( $s ), 'Text::Tradition::Stemma', "Got a stemma object returned" );
is( $t->stemma, $s, "Stemma is the right one" );

=end testing

=cut

sub add_stemma {
	my( $self, $dot ) = @_;
	open my $stemma_fh, '<', $dot or warn "Could not open file $dot";
	my $stemma = Text::Tradition::Stemma->new( 
		'collation' => $self->collation,
		'dot' => $stemma_fh );
	$self->_add_stemma( $stemma ) if $stemma;
	return $stemma;
}

no Moose;
__PACKAGE__->meta->make_immutable;


=head1 BUGS / TODO

=over

=item * Allow tradition to be initialized via passing to a collator.

=back

=head1 LICENSE

This package is free software and is provided "as is" without express
or implied warranty.  You can redistribute it and/or modify it under
the same terms as Perl itself.

=head1 AUTHOR

Tara L Andrews E<lt>aurum@cpan.orgE<gt>
Commit	Line	Data
dd3b58b0	1	package Text::Tradition;
dd3b58b0	2
4a8828f0	3	use Module::Load;
dd3b58b0	4	use Moose;
8e1394aa	5	use Text::Tradition::Collation;
56cf65bd	6	use Text::Tradition::Stemma;
8e1394aa	7	use Text::Tradition::Witness;
dd3b58b0	8
331c2dbf	9	use vars qw( $VERSION );
	10	$VERSION = "0.1";
	11
dd3b58b0	12	has 'collation' => (
8e1394aa	13	is => 'ro',
	14	isa => 'Text::Tradition::Collation',
	15	writer => '_save_collation',
	16	);
dd3b58b0	17
3b853983	18	has 'witness_hash' => (
	19	traits => ['Hash'],
	20	isa => 'HashRef[Text::Tradition::Witness]',
8e1394aa	21	handles => {
3b853983	22	witness => 'get',
	23	add_witness => 'set',
	24	del_witness => 'delete',
	25	has_witness => 'exists',
	26	witnesses => 'values',
8e1394aa	27	},
3b853983	28	default => sub { {} },
8e1394aa	29	);
c5104dc0	30
df6d9812	31	has 'name' => (
	32	is => 'rw',
	33	isa => 'Str',
	34	default => 'Tradition',
	35	);
56cf65bd	36
	37	has 'stemma' => (
	38	is => 'ro',
	39	isa => 'Text::Tradition::Stemma',
	40	writer => '_add_stemma',
	41	);
3b853983	42
3b853983	43	# Create the witness before trying to add it
910a0a6d	44	around 'add_witness' => sub {
	45	my $orig = shift;
	46	my $self = shift;
331c2dbf	47	# TODO allow add of a Witness object?
910a0a6d	48	my $new_wit = Text::Tradition::Witness->new( @_ );
3b853983	49	$self->$orig( $new_wit->sigil => $new_wit );
910a0a6d	50	return $new_wit;
910a0a6d	51	};
331c2dbf	52
3b853983	53	# Allow deletion of witness by object as well as by sigil
	54	around 'del_witness' => sub {
	55	my $orig = shift;
	56	my $self = shift;
	57	my @key_args;
	58	foreach my $arg ( @_ ) {
	59	push( @key_args,
	60	ref( $arg ) eq 'Text::Tradition::Witness' ? $arg->sigil : $arg );
	61	}
	62	return $self->$orig( @key_args );
	63	};
	64
	65	# Don't allow an empty hash value
	66	around 'witness' => sub {
	67	my( $orig, $self, $arg ) = @_;
	68	return unless $self->has_witness( $arg );
	69	return $self->$orig( $arg );
	70	};
	71
331c2dbf	72	=head1 NAME
	73
	74	Text::Tradition - a software model for a set of collated texts
	75
	76	=head1 SYNOPSIS
	77
	78	use Text::Tradition;
	79	my $t = Text::Tradition->new(
	80	'name' => 'this is a text',
	81	'input' => 'TEI',
	82	'file' => '/path/to/tei_parallel_seg_file.xml' );
	83
	84	my @text_wits = $t->witnesses();
	85	my $manuscript_a = $t->witness( 'A' );
	86	my $new_ms = $t->add_witness( 'sigil' => 'B' );
	87
	88	my $text_path_svg = $t->collation->as_svg();
	89	## See Text::Tradition::Collation for more on text collation itself
	90
	91	=head1 DESCRIPTION
	92
	93	Text::Tradition is a library for representation and analysis of collated
	94	texts, particularly medieval ones. A 'tradition' refers to the aggregation
	95	of surviving versions of a text, generally preserved in multiple
	96	manuscripts (or 'witnesses'). A Tradition object thus has one more more
	97	Witnesses, as well as a Collation that represents the unity of all versions
	98	of the text.
	99
	100	=head1 METHODS
	101
	102	=head2 new
	103
	104	Creates and returns a new text tradition object. The following options are
	105	accepted.
	106
	107	General options:
	108
	109	=over 4
	110
	111	=item B<name> - The name of the text.
	112
	113	=back
	114
	115	Initialization based on a collation file:
	116
	117	=over 4
	118
	119	=item B<input> - The input format of the collation file. Can be one of the
	120	following:
	121
	122	=over 4
	123
	124	=item * Self - a GraphML format produced by this module
	125
	126	=item * CollateX - a GraphML format produced by CollateX
	127
	128	=item * CTE - a TEI XML format produced by Classical Text Editor
	129
	130	=item * KUL - a specific CSV format for variants, not documented here
	131
	132	=item * TEI - a TEI parallel segmentation format file
	133
	134	=item * Tabular - a comma- or tab-separated collation. Takes an additional
	135	option, 'sep_char', which defaults to the tab character.
136
137	=back
138
139	=item B<file> - The name of the file that contains the data. One of 'file'
140	or 'string' should be specified.
141
142	=item B<string> - A text string that contains the data. One of 'file' or
143	'string' should be specified.
144
145	=item B<base> - The name of a text file that contains the base text, to be
146	used with input formats that require it (currently only KUL).
147
148	=back
149
150	Initialization based on a list of witnesses [NOT YET IMPLEMENTED]:
151
152	=over 4
153
154	=item B<witnesses> - A reference to an array of Text::Tradition::Witness
155	objects that carry the text to be collated.
156
157	=item B<collator> - A reference to a collation program that will accept
158	Witness objects.
159
160	=back
161
162	=head2 B<witnesses>
163
164	Return the Text::Tradition::Witness objects associated with this tradition,
165	as an array.
166
044d1e45	167	=head2 B<witness>( $sigil )
	168
	169	Returns the Text::Tradition::Witness object whose sigil is $sigil, or undef
	170	if there is no such object within the tradition.
	171
331c2dbf	172	=head2 B<add_witness>( %opts )
	173
	174	Instantiate a new witness with the given options (see documentation for
	175	Text::Tradition::Witness) and add it to the tradition.
	176
044d1e45	177	=head2 B<del_witness>( $sigil )
	178
	179	Delete the witness with the given sigil from the tradition. Returns the
	180	witness object for the deleted witness.
	181
331c2dbf	182	=begin testing
	183
	184	use_ok( 'Text::Tradition', "can use module" );
	185
	186	my $t = Text::Tradition->new( 'name' => 'empty' );
	187	is( ref( $t ), 'Text::Tradition', "initialized an empty Tradition object" );
	188	is( $t->name, 'empty', "object has the right name" );
	189	is( scalar $t->witnesses, 0, "object has no witnesses" );
	190
	191	my $simple = 't/data/simple.txt';
	192	my $s = Text::Tradition->new(
	193	'name' => 'inline',
	194	'input' => 'Tabular',
	195	'file' => $simple,
	196	);
	197	is( ref( $s ), 'Text::Tradition', "initialized a Tradition object" );
	198	is( $s->name, 'inline', "object has the right name" );
	199	is( scalar $s->witnesses, 3, "object has three witnesses" );
	200
044d1e45	201	my $wit_a = $s->witness('A');
	202	is( ref( $wit_a ), 'Text::Tradition::Witness', "Found a witness A" );
	203	if( $wit_a ) {
	204	is( $wit_a->sigil, 'A', "Witness A has the right sigil" );
	205	}
	206	is( $s->witness('X'), undef, "There is no witness X" );
	207	ok( !exists $s->{'witnesses'}->{'X'}, "Witness key X not created" );
	208
	209	my $wit_d = $s->add_witness( 'sigil' => 'D' );
	210	is( ref( $wit_d ), 'Text::Tradition::Witness', "new witness created" );
	211	is( $wit_d->sigil, 'D', "witness has correct sigil" );
331c2dbf	212	is( scalar $s->witnesses, 4, "object now has four witnesses" );
331c2dbf	213
3b853983	214	my $del = $s->del_witness( 'D' );
044d1e45	215	is( $del, $wit_d, "Deleted correct witness" );
3b853983	216	is( scalar $s->witnesses, 3, "object has three witnesses again" );
3b853983	217
331c2dbf	218	# TODO test initialization by witness list when we have it
	219
	220	=end testing
	221
	222	=cut
910a0a6d	223
df6d9812	224
8e1394aa	225	sub BUILD {
8e1394aa	226	my( $self, $init_args ) = @_;
c5104dc0	227
8e1394aa	228	if( exists $init_args->{'witnesses'} ) {
910a0a6d	229	# We got passed an uncollated list of witnesses. Make a
	230	# witness object for each witness, and then send them to the
	231	# collator.
	232	my $autosigil = 0;
	233	foreach my $wit ( %{$init_args->{'witnesses'}} ) {
	234	# Each item in the list is either a string or an arrayref.
	235	# If it's a string, it is a filename; if it's an arrayref,
	236	# it is a tuple of 'sigil, file'. Handle either case.
	237	my $args;
	238	if( ref( $wit ) eq 'ARRAY' ) {
	239	$args = { 'sigil' => $wit->[0],
	240	'file' => $wit->[1] };
	241	} else {
	242	$args = { 'sigil' => chr( $autosigil+65 ),
	243	'file' => $wit };
	244	$autosigil++;
	245	}
	246	$self->witnesses->add_witness( $args );
	247	# TODO Now how to collate these?
	248	}
c5104dc0	249	} else {
910a0a6d	250	# Else we need to parse some collation data. Make a Collation object
	251	my $collation = Text::Tradition::Collation->new( %$init_args,
	252	'tradition' => $self );
	253	$self->_save_collation( $collation );
4a8828f0	254
910a0a6d	255	# Call the appropriate parser on the given data
fa954f4c	256	my @format_standalone = qw/ Self CollateText CollateX CTE TEI Tabular /;
dfc37e38	257	my @format_basetext = qw/ KUL /;
	258	my $use_base;
	259	my $format = $init_args->{'input'};
dfc37e38	260	if( $format && !( grep { $_ eq $format } @format_standalone )
	261	&& !( grep { $_ eq $format } @format_basetext ) ) {
	262	warn "Unrecognized input format $format; not parsing";
910a0a6d	263	return;
910a0a6d	264	}
dfc37e38	265	if( $format && grep { $_ eq $format } @format_basetext ) {
	266	$use_base = 1;
	267	if( !exists $init_args->{'base'} ) {
	268	warn "Cannot make a collation from $format without a base text";
	269	return;
	270	}
	271	}
4a8828f0	272
910a0a6d	273	# Now do the parsing.
910a0a6d	274	if( $format ) {
dfc37e38	275	if( $use_base ) {
	276	$format = 'BaseText'; # Use the BaseText module for parsing,
	277	# but retain the original input arg.
910a0a6d	278	}
	279	my $mod = "Text::Tradition::Parser::$format";
	280	load( $mod );
dfc37e38	281	$mod->can('parse')->( $self, $init_args );
910a0a6d	282	}
c5104dc0	283	}
8e1394aa	284	}
c5104dc0	285
56cf65bd	286	=head2 add_stemma( $dotfile )
	287
	288	Initializes a Text::Tradition::Stemma object from the given dotfile,
	289	and associates it with the tradition.
	290
	291	=begin testing
	292
	293	use Text::Tradition;
	294
	295	my $t = Text::Tradition->new(
	296	'name' => 'simple test',
	297	'input' => 'Tabular',
	298	'file' => 't/data/simple.txt',
	299	);
	300
	301	my $s;
	302	ok( $s = $t->add_stemma( 't/data/simple.dot' ), "Added a simple stemma" );
	303	is( ref( $s ), 'Text::Tradition::Stemma', "Got a stemma object returned" );
	304	is( $t->stemma, $s, "Stemma is the right one" );
	305
	306	=end testing
	307
	308	=cut
	309
	310	sub add_stemma {
	311	my( $self, $dot ) = @_;
	312	open my $stemma_fh, '<', $dot or warn "Could not open file $dot";
	313	my $stemma = Text::Tradition::Stemma->new(
	314	'collation' => $self->collation,
	315	'dot' => $stemma_fh );
	316	$self->_add_stemma( $stemma ) if $stemma;
	317	return $stemma;
	318	}
	319
dd3b58b0	320	no Moose;
dd3b58b0	321	__PACKAGE__->meta->make_immutable;
331c2dbf	322
	323
	324	=head1 BUGS / TODO
	325
	326	=over
	327
	328	=item * Allow tradition to be initialized via passing to a collator.
	329
	330	=back
	331
	332	=head1 LICENSE
	333
	334	This package is free software and is provided "as is" without express
	335	or implied warranty. You can redistribute it and/or modify it under
	336	the same terms as Perl itself.
	337
	338	=head1 AUTHOR
	339
	340	Tara L Andrews E<lt>aurum@cpan.orgE<gt>