Adding VideosResource to return JSON blobs of video data for the training page.

1 files changed, 120 insertions, 0 deletions

diff --git a/src/com/p4square/grow/frontend/VideosResource.java b/src/com/p4square/grow/frontend/VideosResource.java
new file mode 100644
index 0000000..fed315b
--- /dev/null
+++ b/src/com/p4square/grow/frontend/VideosResource.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2013 Jesse Morgan
+ */
+
+package com.p4square.grow.frontend;
+
+import java.util.Map;
+
+import freemarker.template.Template;
+
+import org.restlet.data.Form;
+import org.restlet.data.MediaType;
+import org.restlet.data.Status;
+import org.restlet.ext.jackson.JacksonRepresentation;
+import org.restlet.representation.Representation;
+import org.restlet.resource.ServerResource;
+
+import org.apache.log4j.Logger;
+
+import net.jesterpm.fmfacade.json.JsonRequestClient;
+import net.jesterpm.fmfacade.json.JsonResponse;
+
+import com.p4square.grow.config.Config;
+
+/**
+ * VideosResource returns JSON blobs with video information and records watched
+ * videos.
+ *
+ * @author Jesse Morgan <jesse@jesterpm.net>
+ */
+public class VideosResource extends ServerResource {
+    private static Logger cLog = Logger.getLogger(VideosResource.class);
+
+    private Config mConfig;
+    private JsonRequestClient mJsonClient;
+
+    // Fields pertaining to this request.
+    private String mChapter;
+    private String mVideoId;
+    private String mUserId;
+
+    @Override
+    public void doInit() {
+        super.doInit();
+
+        GrowFrontend growFrontend = (GrowFrontend) getApplication();
+        mConfig = growFrontend.getConfig();
+
+        mJsonClient = new JsonRequestClient(getContext().getClientDispatcher());
+
+        mChapter = getAttribute("chapter");
+        mVideoId = getAttribute("videoId");
+        mUserId = getRequest().getClientInfo().getUser().getIdentifier();
+    }
+
+    /**
+     * Fetch a video record from the backend.
+     */
+    @Override
+    protected Representation get() {
+        try {
+            JsonResponse response = backendGet("/training/" + mChapter + "/videos/" + mVideoId);
+
+            if (response.getStatus().isSuccess()) {
+                return new JacksonRepresentation<Map>(response.getMap()); 
+
+            } else {
+                setStatus(response.getStatus());
+                return null;
+            }
+
+        } catch (Exception e) {
+            cLog.fatal("Could not render page: " + e.getMessage(), e);
+            setStatus(Status.SERVER_ERROR_INTERNAL);
+            return null;
+        }
+    }
+
+    /**
+     * Mark a video as completed.
+     */
+    @Override
+    protected Representation post(Representation entity) {
+        return null;
+    }
+
+    /**
+     * @return The backend endpoint URI
+     */
+    private String getBackendEndpoint() {
+        return mConfig.getString("backendUri", "riap://component/backend");
+    }
+
+    /**
+     * Helper method to send a GET to the backend.
+     */
+    private JsonResponse backendGet(final String uri) {
+        cLog.debug("Sending backend GET " + uri);
+
+        final JsonResponse response = mJsonClient.get(getBackendEndpoint() + uri);
+        final Status status = response.getStatus();
+        if (!status.isSuccess() && !Status.CLIENT_ERROR_NOT_FOUND.equals(status)) {
+            cLog.warn("Error making backend request for '" + uri + "'. status = " + response.getStatus().toString());
+        }
+
+        return response;
+    }
+
+    private JsonResponse backendPut(final String uri, final Map data) {
+        cLog.debug("Sending backend PUT " + uri);
+
+        final JsonResponse response = mJsonClient.put(getBackendEndpoint() + uri, data);
+        final Status status = response.getStatus();
+        if (!status.isSuccess() && !Status.CLIENT_ERROR_NOT_FOUND.equals(status)) {
+            cLog.warn("Error making backend request for '" + uri + "'. status = " + response.getStatus().toString());
+        }
+
+        return response;
+    }
+}