From 971155a2f06266ffb5fa1234d4901a174dac5a3a Mon Sep 17 00:00:00 2001
From: mguetlein <martin.guetlein@gmail.com>
Date: Fri, 3 Sep 2010 17:33:34 +0200
Subject: add metadata functionality

---
 application.rb | 35 ++++++++++++++++++++++++++++++-----
 1 file changed, 30 insertions(+), 5 deletions(-)

diff --git a/application.rb b/application.rb
index 7494748..fea6755 100755
--- a/application.rb
+++ b/application.rb
@@ -36,7 +36,11 @@ get '/?' do
   Dataset.all(params).collect{|d| d.uri}.join("\n") + "\n"
 end
 
-get '/:id' do
+# provides dataset in various formats
+#
+# only_metadata=true => compounds and features are removed
+#
+def get_dataset( params, request, response, only_metadata=false )
   accept = request.env['HTTP_ACCEPT']
   accept = 'application/rdf+xml' if accept == '*/*' or accept == '' or accept.nil?
   # workaround for browser links
@@ -59,14 +63,27 @@ get '/:id' do
     halt 404, "Dataset #{params[:id]} not found."
   end
   halt 404, "Dataset #{params[:id]} not found." if dataset.nil? # not sure how an empty cataset can be returned, but if this happens stale processes keep runing at 100% cpo
+  
+  if only_metadata # remove compounds and feature data from yaml
+    d = YAML.load(dataset.yaml)
+    def d.to_yaml_properties
+      super - [ "@compounds", "@features", "@data"]
+    end
+    dataset.yaml = d.to_yaml
+  end
+  
   case accept
   when /rdf/ # redland sends text/rdf instead of application/rdf+xml
     response['Content-Type'] = 'application/rdf+xml'
-    unless dataset.owl # lazy owl creation
-      dataset.owl = dataset.to_owl
-      dataset.save
+    if only_metadata
+      dataset.to_owl
+    else
+      unless dataset.owl # lazy owl creation
+        dataset.owl = dataset.to_owl
+        dataset.save
+      end
+      dataset.owl
     end
-    dataset.owl
   when /yaml/
     response['Content-Type'] = 'application/x-yaml'
     dataset.yaml
@@ -104,6 +121,14 @@ get '/:id' do
   end
 end
 
+get '/:id' do
+  get_dataset(params, request, response)
+end
+
+get '/:id/metadata/?' do
+  get_dataset(params, request, response, true)
+end
+
 get '/:id/features/:feature_id/?' do
   OpenTox::Dataset.find(url_for("/#{params[:id]}", :full)).feature(params[:feature_id])
 end
-- 
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