Feature request: What depends on this?, fixes metacpan#111

lib/MetaCPAN/Web/Controller/Activity.pm

@@ -18,6 +18,9 @@ sub index : Path {
     if ( my $distribution = $req->parameters->{distribution} ) {
         push( @$q, { term => { distribution => $distribution } } );
     }
+    if ( my $requires = $req->parameters->{requires} ) {
+        push( @$q, { term => { "release.dependency.module" => $requires } } );
+    }
 
     my $cv = AE::cv;
     my $start

lib/MetaCPAN/Web/Controller/Requires.pm

@@ -0,0 +1,18 @@
+package MetaCPAN::Web::Controller::Requires;
+
+use Moose;
+use namespace::autoclean;
+
+BEGIN { extends 'MetaCPAN::Web::Controller' }
+
+sub index : Chained('/') : PathPart('requires') : CaptureArgs(0) {
+}
+
+sub module : Chained('index') : PathPart : Args(1) {
+    my ( $self, $c, $module ) = @_;
+    my $cv = AE::cv;
+    my $data = $c->model('API::Module')->requires($module, $c->req->page)->recv;
+    $c->stash({%{$data}, module => $module, template => 'requires.html'});
+}
+
+1;

lib/MetaCPAN/Web/Model/API/Module.pm

@@ -135,7 +135,8 @@ sub search_distribution {
             my @ids = map { $_->{fields}->{id} } @{ $data->{hits}->{hits} };
             my $descriptions = $self->search_descriptions(@ids);
             my $ratings      = $self->model('Rating')->get(@distributions);
-            my $favorites    = $self->model('Favorite')->get($user, @distributions);
+            my $favorites
+                = $self->model('Favorite')->get( $user, @distributions );
             return $ratings & $favorites & $descriptions;
         }
         )->(
@@ -190,8 +191,9 @@ sub search_collapsed {
         }
 
         @distributions = splice( @distributions, $from, 20 );
-        my $ratings   = $self->model('Rating')->get(@distributions);
-        my $favorites = $self->model('Favorite')->get($user, @distributions);
+        my $ratings = $self->model('Rating')->get(@distributions);
+        my $favorites
+            = $self->model('Favorite')->get( $user, @distributions );
         my $results
             = $self->model('Module')
             ->search( $query,
@@ -461,6 +463,43 @@ sub _search_in_distributions {
             }
         } };
 }
-__PACKAGE__->meta->make_immutable;
 
-1;
+sub requires {
+    my ( $self, $module, $page ) = @_;
+    my $cv = $self->cv;
+    $self->request(
+        '/release/_search',
+        {   query => {
+                filtered => {
+                    query  => { "match_all" => {} },
+                    filter => {
+                        and => [
+                            { term => { 'release.status'     => 'latest' } },
+                            { term => { 'release.authorized' => \1 } },
+                            {   term => {
+                                    "release.dependency.module" => $module
+                                }
+                            }
+                        ]
+                    }
+                }
+            },
+            size => 50,
+            from => $page * 50 - 50,
+            sort => [{date => 'desc'}],
+        }
+        )->(
+        sub {
+            my $data = shift->recv;
+            $cv->send(
+                {   data  => [map { $_->{_source} } @{$data->{hits}->{hits}}],
+                    total => $data->{hits}->{total},
+                    took  => $data->{took}
+                }
+            );
+        }
+        );
+    return $cv;
+}
+
+__PACKAGE__->meta->make_immutable;

root/author.html

@@ -78,5 +78,5 @@
 </div>
 
 <div class="content">
-<% INCLUDE inc/release-table.html releases = aggregated,  header = 1 %>
+<% INCLUDE inc/release-table.html releases = aggregated, header = 1, tablesorter = 1 %>
 </div>

root/inc/release-table.html

@@ -1,4 +1,4 @@
-<table class="release-table author-table tablesorter">
+<table class="release-table author-table<% IF tablesorter %> tablesorter<% END %>">
 <%- IF header %>
     <thead>
     <tr>

root/module.html

@@ -38,6 +38,7 @@
       <input type="text" name="q">
       <input type="submit" style="display: none"></form></li>
     <li><a href="#" onclick="return toggleTOC()">Toggle Table of Contents</a></li>
+    <li><a href="/requires/module/<% module.distribution.replace('-', '::') %>">Dependants</a></li>
     <li><a href="http://explorer.metacpan.org/?url=/module/<% module.author %>/<% module.release %>/<% module.path %>">MetaCPAN Explorer</a></li>
   </ul>
   <hr>

root/release.html

@@ -28,6 +28,7 @@
       <input type="hidden" name="q" value="distribution:<% release.distribution %>">
       <input type="text" name="q">
       <input type="submit" style="display: none"></form></li>
+    <li><a href="/requires/module/<% release.distribution.replace('-', '::') %>">Dependants</a></li>
     <li><a href="http://explorer.metacpan.org/?url=/release/<% release.author %>/<% release.name %>">MetaCPAN Explorer</a></li>
   </ul>
   <hr>

root/requires.html

@@ -0,0 +1,20 @@
+<%- title = "Distributions depending on " _ module %>
+<div class="search-bar">
+  <% INCLUDE inc/activity.html query = "requires=" _ module %>
+  <hr>
+  <strong>Index</strong>
+  <ul>
+    <a href=""><li>Latest</li></a>
+    <a href=""><li>CPAN</li></a>
+    <a href=""><li>BackPAN</li></a>
+  </ul>
+</div>
+
+<div class="content">
+<% IF data.size > 0 %>
+<% INCLUDE inc/release-table.html releases = data, header = 1 %>
+<% INCLUDE inc/pager.html size = 50 %>
+<% ELSE %>
+<big><strong>No depedants for <% module %> could be found</strong></big>
+<% END %>
+</div>

root/static/css/style.css

@@ -643,6 +643,11 @@ div.qtip-github table th {
     padding: 2px;
 }
 
+.release-table th {
+    text-align: left;
+    font-weight: bold;
+}
+
 .release-table .name {
     width: 266px;
 }

root/static/js/cpan.js

@@ -74,7 +74,7 @@ $(document).ready(function() {
     $('#signin-button').mouseenter(function(){$('#signin').show()});
     $('#signin').mouseleave(function(){$('#signin').hide()});
 
-    $('.author-table').tablesorter({widgets: ['zebra'],textExtraction: function(node){
+    $('.tablesorter').tablesorter({widgets: ['zebra'],textExtraction: function(node){
         if(node.getAttribute('class') == 'date') {
             var date = new Date(node.firstChild.getAttribute('sort'));
             return date.getTime();