remove 'meaning' relationship from interface too
[scpubgit/stemmatology.git] / stemmaweb / lib / stemmaweb / Controller / Relation.pm
1 package stemmaweb::Controller::Relation;
2 use Moose;
3 use namespace::autoclean;
4 use TryCatch;
5
6 BEGIN { extends 'Catalyst::Controller' }
7
8
9 =head1 NAME
10
11 stemmaweb::Controller::Relation - Controller for the relationship mapper
12
13 =head1 DESCRIPTION
14
15 The reading relationship mapper with draggable nodes.
16
17 =head1 METHODS
18
19 =head2 index
20
21  GET relation/$textid
22  
23 Renders the application for the text identified by $textid.
24
25 =cut
26
27 sub index :Path :Args(0) {
28         my( $self, $c ) = @_;
29         $c->stash->{'template'} = 'relate.tt';
30 }
31
32 =head2 help
33
34  GET relation/help
35
36 Returns the help window HTML.
37
38 =cut
39
40 sub help :Local :Args(0) {
41         my( $self, $c ) = @_;
42         $c->stash->{'template'} = 'relatehelp.tt';
43 }
44
45 =head2 definitions
46
47  GET relation/definitions
48  
49 Returns a data structure giving the valid types and scopes for a relationship.
50
51 =cut
52
53 sub definitions :Local :Args(0) {
54         my( $self, $c ) = @_;
55         my $valid_relationships = [ qw/ spelling orthographic grammatical lexical transposition / ];
56         my $valid_scopes = [ qw/ local global / ];
57         $c->stash->{'result'} = { 'types' => $valid_relationships, 'scopes' => $valid_scopes };
58         $c->forward('View::JSON');
59 }
60
61 =head2 text
62
63  GET relation/$textid/
64  
65  Runs the relationship mapper for the specified text ID.
66  
67 =cut
68
69 sub text :Chained('/') :PathPart('relation') :CaptureArgs(1) {
70         my( $self, $c, $textid ) = @_;
71         # If the tradition has more than 500 ranks or so, split it up.
72         my $tradition = $c->model('Directory')->tradition( $textid );
73         my $length = $tradition->collation->end->rank;
74         if( $length > 700 ) {
75                 # Segment the tradition in order not to overload the browser.
76                 # Split it up into units of 500 ranks, but have each segment show
77                 # 550 ranks so that overlap works.
78                 my @divs;
79                 my $r = 0;
80                 while( $r + 50 < $length ) {
81                         push( @divs, $r );
82                         $r += 500;
83                 }
84                 $c->stash->{'textsegments'} = [];
85                 foreach my $i ( 0..$#divs ) {
86                         my $seg = { 'start' => $divs[$i] };
87                         $seg->{'display'} = "Segment " . ($i+1);
88                         push( @{$c->stash->{'textsegments'}}, $seg );
89                 }
90         }
91         $DB::single = 1;
92         $c->stash->{'textid'} = $textid;
93         $c->stash->{'tradition'} = $tradition;
94 }
95
96 sub main :Chained('text') :PathPart('') :Args(0) {
97         my( $self, $c ) = @_;
98         my $startseg = $c->req->param('start');
99         my $tradition = delete $c->stash->{'tradition'};
100         my $collation = $tradition->collation;
101         my $svgopts;
102         if( $startseg ) {
103                 # Only render the subgraph from startseg to +550 or end,
104                 # whichever is less.
105                 $svgopts = { 'from' => $startseg };
106                 $svgopts->{'to'} = $startseg + 550
107                         if $startseg + 550 < $collation->end->rank;
108         } elsif( exists $c->stash->{'textsegments'} ) {
109                 # This is the unqualified load of a long tradition. We implicitly start 
110                 # at zero, but go only as far as 550.
111                 $startseg = 0;
112                 $svgopts = { 'to' => 550 };
113         }
114         my $svg_str = $collation->as_svg( $svgopts );
115         $svg_str =~ s/\n//gs;
116         $c->stash->{'startseg'} = $startseg if defined $startseg;
117         $c->stash->{'svg_string'} = $svg_str;
118         $c->stash->{'text_title'} = $tradition->name;
119         $c->stash->{'template'} = 'relate.tt';
120 }
121
122 =head2 relationships
123
124  GET relation/$textid/relationships
125
126 Returns the list of relationships defined for this text.
127
128  POST relation/$textid/relationships { request }
129  
130 Attempts to define the requested relationship within the text. Returns 200 on
131 success or 403 on error.
132
133  DELETE relation/$textid/relationships { request }
134  
135
136 =cut
137
138 sub relationships :Chained('text') :PathPart :Args(0) {
139         my( $self, $c ) = @_;
140         my $tradition = delete $c->stash->{'tradition'};
141         my $collation = $tradition->collation;
142         my $m = $c->model('Directory');
143         if( $c->request->method eq 'GET' ) {
144                 my @pairs = $collation->relationships; # returns the edges
145                 my @all_relations;
146                 foreach my $p ( @pairs ) {
147                         my $relobj = $collation->relations->get_relationship( @$p );
148                         next if $relobj->type eq 'collated'; # Don't show these
149                         my $relhash = { source => $p->[0], target => $p->[1], 
150                                   type => $relobj->type, scope => $relobj->scope };
151                         $relhash->{'note'} = $relobj->annotation if $relobj->has_annotation;
152                         push( @all_relations, $relhash );
153                 }
154                 $c->stash->{'result'} = \@all_relations;
155         } elsif( $c->request->method eq 'POST' ) {
156                 my $node = $c->request->param('source_id');
157                 my $target = $c->request->param('target_id');
158                 my $relation = $c->request->param('rel_type');
159                 my $note = $c->request->param('note');
160                 my $scope = $c->request->param('scope');
161         
162                 my $opts = { 'type' => $relation,
163                                          'scope' => $scope };
164                 $opts->{'annotation'} = $note if $note;
165                 
166                 try {
167                         my @vectors = $collation->add_relationship( $node, $target, $opts );
168                         $c->stash->{'result'} = \@vectors;
169                         $m->save( $tradition );
170                 } catch( Text::Tradition::Error $e ) {
171                         $c->response->status( '403' );
172                         $c->stash->{'result'} = { 'error' => $e->message };
173                 }
174         } elsif( $c->request->method eq 'DELETE' ) {
175                 my $node = $c->request->param('source_id');
176                 my $target = $c->request->param('target_id');
177         
178                 try {
179                         my @vectors = $collation->del_relationship( $node, $target );
180                         $m->save( $tradition );
181                         $c->stash->{'result'} = \@vectors;
182                 } catch( Text::Tradition::Error $e ) {
183                         $c->response->status( '403' );
184                         $c->stash->{'result'} = { 'error' => $e->message };
185                 }       
186         }
187         $c->forward('View::JSON');
188 }               
189                 
190
191 =head2 end
192
193 Attempt to render a view, if needed.
194
195 =cut
196
197 sub end : ActionClass('RenderView') {}
198
199 =head1 AUTHOR
200
201 Tara L Andrews
202
203 =head1 LICENSE
204
205 This library is free software. You can redistribute it and/or modify
206 it under the same terms as Perl itself.
207
208 =cut
209
210 __PACKAGE__->meta->make_immutable;
211
212 1;