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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.ui.impl;
import org.onosproject.rest.AbstractInjectionResource;
import org.onosproject.ui.UiExtension;
import org.onosproject.ui.UiExtensionService;
import org.onosproject.ui.UiView;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.SequenceInputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import static com.google.common.collect.ImmutableList.of;
import static com.google.common.io.ByteStreams.toByteArray;
/**
* Resource for serving the dynamically composed nav.html.
*/
@Path("/")
public class MainNavResource extends AbstractInjectionResource {
private static final String NAV_HTML = "nav.html";
private static final String INJECT_VIEW_ITEMS_START =
"<!-- {INJECTED-VIEW-NAV-START} -->";
private static final String INJECT_VIEW_ITEMS_END =
"<!-- {INJECTED-VIEW-NAV-END} -->";
private static final String HDR_FORMAT =
"<div class=\"nav-hdr\">%s</div>\n";
private static final String NAV_FORMAT =
"<a ng-click=\"navCtrl.hideNav()\" href=\"#/%s\">%s %s</a>\n";
private static final String BLANK_GLYPH = "unknown";
@GET
@Produces(MediaType.TEXT_HTML)
public Response getNavigation() throws IOException {
UiExtensionService service = get(UiExtensionService.class);
InputStream navTemplate =
getClass().getClassLoader().getResourceAsStream(NAV_HTML);
String html = new String(toByteArray(navTemplate));
int p1s = split(html, 0, INJECT_VIEW_ITEMS_START);
int p1e = split(html, 0, INJECT_VIEW_ITEMS_END);
int p2s = split(html, p1e, null);
StreamEnumeration streams =
new StreamEnumeration(of(stream(html, 0, p1s),
includeNavItems(service),
stream(html, p1e, p2s)));
return Response.ok(new SequenceInputStream(streams)).build();
}
// Produces an input stream of nav item injections from all extensions.
private InputStream includeNavItems(UiExtensionService service) {
List<UiExtension> extensions = service.getExtensions();
StringBuilder sb = new StringBuilder("\n");
for (UiView.Category cat : UiView.Category.values()) {
if (cat == UiView.Category.HIDDEN) {
continue;
}
List<UiView> catViews = getViewsForCat(extensions, cat);
if (!catViews.isEmpty()) {
addCatHeader(sb, cat);
addCatItems(sb, catViews);
}
}
return new ByteArrayInputStream(sb.toString().getBytes());
}
private List<UiView> getViewsForCat(List<UiExtension> extensions,
UiView.Category cat) {
List<UiView> views = new ArrayList<>();
for (UiExtension extension : extensions) {
views.addAll(extension.views().stream().filter(
view -> cat.equals(view.category())
).collect(Collectors.toList()));
}
return views;
}
private void addCatHeader(StringBuilder sb, UiView.Category cat) {
sb.append(String.format(HDR_FORMAT, cat.label()));
}
private void addCatItems(StringBuilder sb, List<UiView> catViews) {
for (UiView view : catViews) {
sb.append(String.format(NAV_FORMAT, view.id(), icon(view), view.label()));
}
}
private String icon(UiView view) {
String gid = view.iconId() == null ? BLANK_GLYPH : view.iconId();
return "<div icon icon-id=\"" + gid + "\"></div>";
}
}
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