fix friendica parsing with acct URIs in aliases

lib/diaspora_federation/discovery/web_finger.rb

@@ -220,11 +220,14 @@ module DiasporaFederation
       end
       private_class_method :parse_link
 
+      # this method is used to parse the alias_url from the XML.
+      # * redmatrix has sometimes no alias, return nil
+      # * old pods had quotes around the alias url, this can be removed later
+      # * friendica has two aliases and the first is with "acct:": return only an URL starting with http (or https)
       def self.parse_alias(aliases)
         return nil unless aliases
-        alias_string = aliases.first
-        # Old pods had quotes around alias. Remove this, when all pods use this gem for generation
-        alias_string.gsub(/\A"|"\Z/, "")
+        # TODO: Old pods had quotes around alias. Remove the +map+ in next line, when all pods use this gem
+        aliases.map {|a| a.gsub(/\A"|"\Z/, "") }.find {|a| a.start_with?("http") }
       end
       private_class_method :parse_alias
     end

spec/lib/diaspora_federation/discovery/web_finger_spec.rb

@@ -96,7 +96,67 @@ XML
         expect(wf.public_key).to eq(person.serialized_public_key)
       end
 
-      it "reads redmatrix XML" do
+      it "reads friendica XML (two aliases, first with acct)" do
+        friendica_xml = <<-XML
+<?xml version="1.0" encoding="UTF-8"?>
+<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
+
+    <Subject>#{acct}</Subject>
+    <Alias>#{acct}</Alias>
+    <Alias>#{person.alias_url}</Alias>
+
+    <Link rel="http://purl.org/macgirvin/dfrn/1.0"
+          href="#{person.profile_url}" />
+    <Link rel="http://schemas.google.com/g/2010#updates-from"
+          type="application/atom+xml"
+          href="#{person.atom_url}" />
+    <Link rel="http://webfinger.net/rel/profile-page"
+          type="text/html"
+          href="#{person.profile_url}" />
+    <Link rel="http://microformats.org/profile/hcard"
+          type="text/html"
+          href="#{person.hcard_url}" />
+    <Link rel="http://portablecontacts.net/spec/1.0"
+          href="https://pod.example.tld/poco/trouble" />
+    <Link rel="http://webfinger.net/rel/avatar"
+          type="image/jpeg"
+          href="http://localhost:3000/assets/user/default.png" />
+    <Link rel="http://joindiaspora.com/seed_location" type="text/html" href="#{person.url}" />
+    <Link rel="http://joindiaspora.com/guid" type="text/html" href="#{person.guid}" />
+    <Link rel="diaspora-public-key" type="RSA" href="#{public_key_base64}" />
+
+    <Link rel="salmon"
+          href="#{person.salmon_url}" />
+    <Link rel="http://salmon-protocol.org/ns/salmon-replies"
+          href="https://pod.example.tld/salmon/trouble" />
+    <Link rel="http://salmon-protocol.org/ns/salmon-mention"
+          href="https://pod.example.tld/salmon/trouble/mention" />
+    <Link rel="http://ostatus.org/schema/1.0/subscribe"
+          template="https://pod.example.tld/follow?url={uri}" />
+    <Link rel="magic-public-key"
+          href="data:application/magic-public-key,RSA.abcdef1234567890" />
+
+    <Property xmlns:mk="http://salmon-protocol.org/ns/magic-key"
+          type="http://salmon-protocol.org/ns/magic-key"
+          mk:key_id="1">RSA.abcdef1234567890</Property>
+
+</XRD>
+        XML
+
+        wf = Discovery::WebFinger.from_xml(friendica_xml)
+        expect(wf.acct_uri).to eq(acct)
+        expect(wf.alias_url).to eq(person.alias_url)
+        expect(wf.hcard_url).to eq(person.hcard_url)
+        expect(wf.seed_url).to eq(person.url)
+        expect(wf.profile_url).to eq(person.profile_url)
+        expect(wf.atom_url).to eq(person.atom_url)
+        expect(wf.salmon_url).to eq(person.salmon_url)
+
+        expect(wf.guid).to eq(person.guid)
+        expect(wf.public_key).to eq(person.serialized_public_key)
+      end
+
+      it "reads redmatrix XML (no alias)" do
         redmatrix_xml = <<-XML
 <?xml version="1.0" encoding="UTF-8"?>
 <XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">