Dynamically load the default dashboard

Instead of trying to include the default id in the /projects/ output,
always redirect to /projects/{project},dashboards/default. This will
RPC to the server for the definition of the inherited dashboard, if
any exists. If none is found the server will return 404 and the query
project:{project} will be used instead.

Change-Id: Ibaa9f1fd02b716c9201dd353e757a668ef2b01fb

gerrit-common/src/main/java/com/google/gerrit/common/PageLinks.java

@@ -19,7 +19,6 @@ import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.Change.Status;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.Project;
-import com.google.gwt.http.client.URL;
 import com.google.gwtorm.client.KeyUtil;
 
 public class PageLinks {
@@ -78,9 +77,8 @@ public class PageLinks {
     return "/q/" + KeyUtil.encode(query) + "," + page;
   }
 
-  public static String toProjectDashboard(Project.NameKey projectName,
-      String dashboardId) {
-    return PROJECTS + projectName.get() + DASHBOARDS + dashboardId;
+  public static String toProjectDashboard(Project.NameKey name, String id) {
+    return PROJECTS + name.get() + DASHBOARDS + id;
   }
 
   public static String projectQuery(Project.NameKey proj) {

gerrit-gwtui/src/main/java/com/google/gerrit/client/Dispatcher.java

@@ -88,6 +88,7 @@ import com.google.gwt.core.client.GWT;
 import com.google.gwt.core.client.RunAsyncCallback;
 import com.google.gwt.http.client.URL;
 import com.google.gwt.user.client.Window;
+import com.google.gwtjsonrpc.client.RemoteJsonException;
 import com.google.gwtorm.client.KeyUtil;
 
 public class Dispatcher {
@@ -401,12 +402,7 @@ public class Dispatcher {
       rest = rest.substring(c);
       if (matchPrefix(DASHBOARDS, rest)) {
         final String dashboardId = skip(rest);
-        c = dashboardId.indexOf(":");
-        if (0 <= c) {
-          final String ref = URL.decodePathSegment(dashboardId.substring(0, c));
-          final String path = URL.decodePathSegment(dashboardId.substring(c + 1));
-          DashboardList.get(new Project.NameKey(project), ref + ":" + path,
-              new GerritCallback<DashboardInfo>() {
+        GerritCallback<DashboardInfo> cb = new GerritCallback<DashboardInfo>() {
           @Override
           public void onSuccess(DashboardInfo result) {
             if (matchPrefix("/dashboard/", result.url())) {
@@ -414,7 +410,28 @@ public class Dispatcher {
               Gerrit.display(token, new CustomDashboardScreen(rest.substring(1)));
             }
           }
-              });
+
+          @Override
+          public void onFailure(Throwable caught) {
+            if ("default".equals(dashboardId)
+                && caught instanceof RemoteJsonException
+                && ((RemoteJsonException) caught).getCode() == 404) {
+              Gerrit.display(PageLinks.toChangeQuery(
+                  PageLinks.projectQuery(new Project.NameKey(project))));
+            } else {
+              super.onFailure(caught);
+            }
+          }
+        };
+        if ("default".equals(dashboardId)) {
+          DashboardList.getDefault(new Project.NameKey(project), cb);
+          return;
+        }
+        c = dashboardId.indexOf(":");
+        if (0 <= c) {
+          final String ref = URL.decodePathSegment(dashboardId.substring(0, c));
+          final String path = URL.decodePathSegment(dashboardId.substring(c + 1));
+          DashboardList.get(new Project.NameKey(project), ref + ":" + path, cb);
           return;
         }
       }

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ProjectListScreen.java

@@ -98,14 +98,8 @@ public class ProjectListScreen extends Screen {
 
       private Widget createSearchLink(final ProjectInfo projectInfo) {
         Image image = new Image(Gerrit.RESOURCES.queryProjectLink());
-        InlineHyperlink h;
-        if (projectInfo.defaultDashboard() != null) {
-          h = new InlineHyperlink(" ", PageLinks.toProjectDashboard(
-                  projectInfo.name_key(), projectInfo.defaultDashboard()));
-        } else {
-          h = new InlineHyperlink(" ", PageLinks.toChangeQuery(PageLinks
-                  .projectQuery(projectInfo.name_key())));
-        }
+        InlineHyperlink h = new InlineHyperlink(" ",
+            PageLinks.toProjectDashboard(projectInfo.name_key(), "default"));
         h.setTitle(Util.C.projectListQueryLink());
         DOM.insertBefore(h.getElement(), image.getElement(),
             DOM.getFirstChild(h.getElement()));

gerrit-gwtui/src/main/java/com/google/gerrit/client/dashboards/DashboardList.java

@@ -29,7 +29,7 @@ public class DashboardList extends NativeList<DashboardInfo> {
       .get(callback);
   }
 
-  public static void defaultDashboard(Project.NameKey project,
+  public static void getDefault(Project.NameKey project,
       AsyncCallback<DashboardInfo> callback) {
     new RestApi(base(project) + "default")
       .addParameterTrue("inherited")

gerrit-gwtui/src/main/java/com/google/gerrit/client/projects/ProjectInfo.java

@@ -27,7 +27,6 @@ public class ProjectInfo
 
   public final native String name() /*-{ return this.name; }-*/;
   public final native String description() /*-{ return this.description; }-*/;
-  public final native String defaultDashboard() /*-{ return this.default_dashboard; }-*/;
 
   @Override
   public final String getDisplayString() {

gerrit-server/src/main/java/com/google/gerrit/server/project/DashboardsCollection.java

@@ -163,7 +163,7 @@ class DashboardsCollection implements
     return query.replace("${project}", project);
   }
 
-  public static String defaultOf(Project proj) {
+  private static String defaultOf(Project proj) {
     final String defaultId = Objects.firstNonNull(
         proj.getLocalDefaultDashboard(),
         Strings.nullToEmpty(proj.getDefaultDashboard()));

gerrit-server/src/main/java/com/google/gerrit/server/project/ListProjects.java

@@ -284,8 +284,6 @@ public class ListProjects implements RestReadView<TopLevelResource> {
           if (showDescription) {
             info.description = Strings.emptyToNull(e.getProject().getDescription());
           }
-          info.defaultDashboard =
-              Strings.emptyToNull(DashboardsCollection.defaultOf(e.getProject()));
 
           try {
             if (showBranch != null) {
@@ -453,7 +451,6 @@ public class ListProjects implements RestReadView<TopLevelResource> {
     String id;
     String parent;
     String description;
-    String defaultDashboard;
     Map<String, String> branches;
 
     void setName(String name) {