Allow links with only the diaspora ID to link to a profile

closes #8000

Changelog.md

@@ -6,6 +6,7 @@
 
 ## Features
 * Add a manifest.json file as a first step to make diaspora* a Progressive Web App [#7998](https://github.com/diaspora/diaspora/pull/7998)
+* Allow `web+diaspora://` links to link to a profile with only the diaspora ID [#8000](https://github.com/diaspora/diaspora/pull/8000)
 
 # 0.7.10.0
 

app/services/diaspora_link_service.rb

@@ -12,6 +12,8 @@ class DiasporaLinkService
   def find_or_fetch_entity
     if type && guid
       entity_finder.find || fetch_entity
+    elsif author
+      find_or_fetch_person
     end
   end
 
@@ -30,6 +32,12 @@ class DiasporaLinkService
     @entity_finder ||= Diaspora::EntityFinder.new(type, guid)
   end
 
+  def find_or_fetch_person
+    Person.find_or_fetch_by_identifier(author)
+  rescue DiasporaFederation::Discovery::DiscoveryError
+    nil
+  end
+
   def normalize
     link.gsub!(%r{^web\+diaspora://}, "diaspora://") ||
       link.gsub!(%r{^//}, "diaspora://") ||
@@ -42,6 +50,8 @@ class DiasporaLinkService
     match = DiasporaFederation::Federation::DiasporaUrlParser::DIASPORA_URL_REGEX.match(link)
     if match
       @author, @type, @guid = match.captures
+    else
+      @author = %r{^diaspora://(#{Validation::Rule::DiasporaId::DIASPORA_ID_REGEX})$}u.match(link)&.captures&.first
     end
   end
 end

spec/services/diaspora_link_service_spec.rb

@@ -52,5 +52,21 @@ describe DiasporaLinkService do
         expect(service.find_or_fetch_entity).to be_nil
       end
     end
+
+    context "with only a diaspora ID" do
+      let(:person) { FactoryGirl.create(:person) }
+      let(:link) { "diaspora://#{person.diaspora_handle}" }
+
+      it "returns the person" do
+        expect(service.find_or_fetch_entity).to eq(person)
+      end
+
+      it "returns nil when person is non fetchable" do
+        expect(Person).to receive(:find_or_fetch_by_identifier)
+          .with(person.diaspora_handle).and_raise(DiasporaFederation::Discovery::DiscoveryError)
+
+        expect(service.find_or_fetch_entity).to be_nil
+      end
+    end
   end
 end