From 7764f6fc28610799b09ea62e48189aa51e341e41 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Florian=20M=2E=20Sch=C3=A4fer?= <florian@schaeferban.de>
Date: Sun, 20 Jul 2014 07:33:59 +0200
Subject: [PATCH] Added wikidata links to the browse helper

Analogous to wikipedia tags this links any wikidata tag with its item
page on wikidata.

For now it's restricted to the plain wikidata=* tag (namespaces like
operator:wikidata=* and similar are not yet supported) and only accepts
the values with the format Q<number>.
---
 app/helpers/browse_helper.rb | 12 ++++++++++++
 config/locales/en.yml        |  1 +
 2 files changed, 13 insertions(+)

diff --git a/app/helpers/browse_helper.rb b/app/helpers/browse_helper.rb
index e70ec204e..3574d454a 100644
--- a/app/helpers/browse_helper.rb
+++ b/app/helpers/browse_helper.rb
@@ -61,6 +61,8 @@ module BrowseHelper
   def format_value(key, value)
     if wp = wikipedia_link(key, value)
       link_to h(wp[:title]), wp[:url], :title => t('browse.tag_details.wikipedia_link', :page => wp[:title])
+    elsif wdt = wikidata_link(key, value)
+      link_to h(wdt[:title]), wdt[:url], :title => t('browse.tag_details.wikidata_link', :page => wdt[:title])
     elsif url = wiki_link("tag", "#{key}=#{value}")
       link_to h(value), url, :title => t('browse.tag_details.wiki_link.tag', :key => key, :value => value)
     elsif url = telephone_link(key, value)
@@ -149,6 +151,16 @@ private
     }
   end
 
+  def wikidata_link(key, value)
+    if key == "wikidata" and value =~ /^[Qq][1-9][0-9]*$/
+      return {
+        :url => "//www.wikidata.org/wiki/#{value}?uselang=#{I18n.locale}",
+        :title => value
+      }
+    end
+    return nil
+  end
+
   def telephone_link(key, value)
     # does it look like a phone number? eg "+1 (234) 567-8901 " ?
     return nil unless value =~ /^\s*\+[\d\s\(\)\/\.-]{6,25}\s*$/
diff --git a/config/locales/en.yml b/config/locales/en.yml
index fe5f58d51..1518349f3 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -180,6 +180,7 @@ en:
       wiki_link:
         key: "The wiki description page for the %{key} tag"
         tag: "The wiki description page for the %{key}=%{value} tag"
+      wikidata_link: "The %{page} item on Wikidata"
       wikipedia_link: "The %{page} article on Wikipedia"
       telephone_link: "Call %{phone_number}"
     note:
-- 
2.43.2