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/*
* Copyright 2014 Jesse Morgan
*/
package com.p4square.grow.frontend;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import org.restlet.Context;
import org.restlet.Restlet;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.p4square.grow.config.Config;
import com.p4square.grow.frontend.JsonRequestProvider;
import com.p4square.grow.model.Message;
import com.p4square.grow.model.MessageThread;
import com.p4square.grow.provider.JsonEncodedProvider;
import com.p4square.grow.provider.Provider;
/**
* Fetch feed data for a topic.
*/
public class FeedData {
/**
* Allowed Topics.
*/
public static final HashSet<String> TOPICS = new HashSet(Arrays.asList("seeker", "believer",
"disciple", "teacher", "leader"));
private final Config mConfig;
private final String mBackendURI;
// TODO: Elegantly merge the List and individual providers.
private final JsonRequestProvider<List<MessageThread>> mThreadsProvider;
private final JsonRequestProvider<MessageThread> mThreadProvider;
private final JsonRequestProvider<List<Message>> mMessagesProvider;
private final JsonRequestProvider<Message> mMessageProvider;
public FeedData(final Context context, final Config config) {
mConfig = config;
mBackendURI = mConfig.getString("backendUri", "riap://component/backend") + "/feed";
Restlet clientDispatcher = context.getClientDispatcher();
TypeFactory factory = JsonEncodedProvider.MAPPER.getTypeFactory();
JavaType threadType = factory.constructCollectionType(List.class, MessageThread.class);
mThreadsProvider = new JsonRequestProvider<List<MessageThread>>(clientDispatcher, threadType);
mThreadProvider = new JsonRequestProvider<MessageThread>(clientDispatcher, MessageThread.class);
JavaType messageType = factory.constructCollectionType(List.class, Message.class);
mMessagesProvider = new JsonRequestProvider<List<Message>>(clientDispatcher, messageType);
mMessageProvider = new JsonRequestProvider<Message>(clientDispatcher, Message.class);
}
/**
* Get the threads for a topic.
*
* @param topic The topic to request threads for.
* @param limit The maximum number of threads.
* @return A list of MessageThread objects.
*/
public List<MessageThread> getThreads(final String topic, final int limit) throws IOException {
return mThreadsProvider.get(makeUrl(limit, topic));
}
public List<Message> getMessages(final String topic, final String threadId) throws IOException {
return mMessagesProvider.get(makeUrl(topic, threadId));
}
public void createThread(final String topic, final Message message) throws IOException {
MessageThread thread = new MessageThread();
thread.setMessage(message);
mThreadProvider.post(makeUrl(topic), thread);
}
public void createResponse(final String topic, final String thread, final Message message)
throws IOException {
mMessageProvider.post(makeUrl(topic, thread), message);
}
private String makeUrl(String... parts) {
String url = mBackendURI;
for (String part : parts) {
url += "/" + part;
}
return url;
}
private String makeUrl(int limit, String... parts) {
return makeUrl(parts) + "?limit=" + limit;
}
}
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