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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.Response;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.SequenceInputStream;
import static com.google.common.collect.ImmutableList.of;
import static com.google.common.io.ByteStreams.toByteArray;
import static org.onosproject.ui.impl.MainViewResource.SCRIPT;
/**
* Resource for serving the dynamically composed onos.js.
*/
@Path("/")
public class MainModuleResource extends AbstractInjectionResource {
private static final String MAIN_JS = "onos.js";
private static final String INJECT_VIEW_IDS_START = "// {INJECTED-VIEW-IDS-START}";
private static final String INJECT_VIEW_IDS_END = "// {INJECTED-VIEW-IDS-END}";
@GET
@Produces(SCRIPT)
public Response getMainModule() throws IOException {
UiExtensionService service = get(UiExtensionService.class);
InputStream jsTemplate = getClass().getClassLoader().getResourceAsStream(MAIN_JS);
String js = new String(toByteArray(jsTemplate));
int p1s = split(js, 0, INJECT_VIEW_IDS_START);
int p1e = split(js, 0, INJECT_VIEW_IDS_END);
int p2s = split(js, p1e, null);
StreamEnumeration streams =
new StreamEnumeration(of(stream(js, 0, p1s),
includeViewIds(service),
stream(js, p1e, p2s)));
return Response.ok(new SequenceInputStream(streams)).build();
}
// Produces an input stream including view id injections from all extensions.
private InputStream includeViewIds(UiExtensionService service) {
StringBuilder sb = new StringBuilder("\n");
for (UiExtension extension : service.getExtensions()) {
for (UiView view : extension.views()) {
sb.append(" '").append(view.id()).append("',");
}
}
return new ByteArrayInputStream(sb.toString().getBytes());
}
}
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