display some info if newer revision is available, basic list of published revisions (w.i.p.).

related to #45

src/main/java/info/textgrid/rep/browse/BrowseController.java

@@ -3,11 +3,14 @@ package info.textgrid.rep.browse;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
+import java.math.BigInteger;
 import java.net.URLEncoder;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.Locale;
+import java.util.TreeMap;
 import javax.ws.rs.client.ClientBuilder;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -20,6 +23,7 @@ import org.springframework.web.bind.annotation.RequestParam;
 import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
 import info.textgrid.clients.tgcrud.CrudClientException;
 import info.textgrid.namespaces.middleware.tgsearch.ResultType;
+import info.textgrid.namespaces.middleware.tgsearch.Revisions;
 import info.textgrid.rep.i18n.I18N;
 import info.textgrid.rep.i18n.I18NProvider;
 import info.textgrid.rep.markdown.MarkdownUtils;
@@ -112,6 +116,9 @@ public class BrowseController {
       handleMarkdown(model, id);
     }
 
+    // add revisions info
+    listRevisions(model, id, metadata);
+
     return "browse";
   }
 
@@ -278,6 +285,25 @@ public class BrowseController {
     model.addAttribute("htmlContent", content);
   }
 
+  private void listRevisions(Model model, String id, ResultType metadata) {
+    Revisions revisions = tgsearchClientService.listRevisions(id);
+    int displayRev = metadata.getObject().getGeneric().getGenerated().getRevision();
+
+    BigInteger latestRev = Collections.max(revisions.getRevision());
+    if(BigInteger.valueOf(displayRev).compareTo(latestRev) < 0) {
+      model.addAttribute("higherRevisionAvailable", true);
+    }
+
+    if(revisions.getRevision().size() > 0) {
+      TreeMap revmap = new TreeMap<BigInteger, String>();
+      String baseUri = id.substring(0,  id.indexOf("."));
+      for(BigInteger rev : revisions.getRevision()) {
+        revmap.put(rev, baseUri + "." + rev);
+      }
+      model.addAttribute("revisions", revmap);
+    }
+  }
+
 
   private boolean hasIiifManifest(String id) {
 

src/main/java/info/textgrid/rep/service/TgsearchClientService.java

@@ -11,6 +11,7 @@ import info.textgrid.clients.SearchClient;
 import info.textgrid.namespaces.middleware.tgsearch.FacetResponse;
 import info.textgrid.namespaces.middleware.tgsearch.Response;
 import info.textgrid.namespaces.middleware.tgsearch.ResultType;
+import info.textgrid.namespaces.middleware.tgsearch.Revisions;
 
 @Service
 public class TgsearchClientService {
@@ -95,4 +96,8 @@ public class TgsearchClientService {
 
   }
 
+  public Revisions listRevisions(String id) {
+    return searchClient.infoQuery().listRevisions(id);
+  }
+
 }

src/main/resources/i18n/Language_de.properties

@@ -86,6 +86,7 @@ collection-citation-heading=Zitationsvorschlag für diese Kollektion
 aggregation-citation-heading=Zitationsvorschlag für diese Aggregation
 work-citation-heading=Zitationsvorschlag für dieses Werk
 item-citation-heading=Zitationsvorschlag für dieses Objekt
+revisions=Revisionen
 
 #usersettings.jsp
 usersettings=Persönliche Einstellungen

src/main/resources/i18n/Language_en.properties

@@ -86,6 +86,7 @@ collection-citation-heading=Citation Suggestion for this Collection
 aggregation-citation-heading=Citation Suggestion for this Aggregation
 work-citation-heading=Citation Suggestion for this Work
 item-citation-heading=Citation Suggestion for this Object
+revisions=Revisions
 
 #usersettings.jsp
 usersettings=Personal Settings

src/main/webapp/WEB-INF/jsp/browse.jsp

@@ -36,6 +36,20 @@
 
     <aside class="tgrep sidebar">
 
+      <c:if test="${higherRevisionAvailable}">
+        <section class="tgrep sidebar_panel">
+         There is a higher revision available!
+        </section>
+      </c:if>
+      <c:if test="${revisions.size() > 0}">
+        <section class="tgrep sidebar_panel">
+          <h3 class="tgrep sidebar_subheading">${i18n['revisions']}</h3>
+          <c:forEach items="${revisions}" var="rev">
+            <a href="/browse/${rev.value}">${rev.key}</a>
+          </c:forEach>
+        </section>
+      </c:if>
+
       <section class="tgrep sidebar_panel">
         <h3 class="tgrep sidebar_subheading">${i18n['metadata']}</h3>
         <!-- TODO: each for agent, pid, etc -->