/*
* Sone - GetPostAjaxPage.java - Copyright © 2010–2013 David Roden
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.pterodactylus.sone.web.ajax;
import java.io.StringWriter;
import static com.fasterxml.jackson.databind.node.JsonNodeFactory.instance;
import com.google.common.base.Optional;
import net.pterodactylus.sone.data.Post;
import net.pterodactylus.sone.data.Sone;
import net.pterodactylus.sone.web.WebInterface;
import net.pterodactylus.sone.web.page.FreenetRequest;
import net.pterodactylus.util.io.Closer;
import net.pterodactylus.util.template.Template;
import net.pterodactylus.util.template.TemplateContext;
import net.pterodactylus.util.template.TemplateException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
/**
* This AJAX handler retrieves information and rendered representation of a
* {@link Post}.
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
public class GetPostAjaxPage extends JsonPage {
/** The template to render for posts. */
private final Template postTemplate;
/**
* Creates a new “get post” AJAX handler.
*
* @param webInterface
* The Sone web interface
* @param postTemplate
* The template to render for posts
*/
public GetPostAjaxPage(WebInterface webInterface, Template postTemplate) {
super("getPost.ajax", webInterface);
this.postTemplate = postTemplate;
}
/**
* {@inheritDoc}
*/
@Override
protected JsonReturnObject createJsonObject(FreenetRequest request) {
String postId = request.getHttpRequest().getParam("post");
Optional<Post> post = webInterface.getCore().getPost(postId);
if (!post.isPresent()) {
return createErrorJsonObject("invalid-post-id");
}
return createSuccessJsonObject().put("post", createJsonPost(request, post.get(), getCurrentSone(request.getToadletContext())));
}
/**
* {@inheritDoc}
*/
@Override
protected boolean needsFormPassword() {
return false;
}
//
// PRIVATE METHODS
//
/**
* Creates a JSON object from the given post. The JSON object will only
* contain the ID of the post, its time, and its rendered HTML code.
*
* @param request
* The request being processed
* @param post
* The post to create a JSON object from
* @param currentSone
* The currently logged in Sone (to store in the template)
* @return The JSON representation of the post
*/
private JsonNode createJsonPost(FreenetRequest request, Post post, Sone currentSone) {
ObjectNode jsonPost = new ObjectNode(instance);
jsonPost.put("id", post.getId());
jsonPost.put("sone", post.getSone().getId());
jsonPost.put("recipient", post.getRecipientId().orNull());
jsonPost.put("time", post.getTime());
StringWriter stringWriter = new StringWriter();
TemplateContext templateContext = webInterface.getTemplateContextFactory().createTemplateContext();
templateContext.set("core", webInterface.getCore());
templateContext.set("request", request);
templateContext.set("post", post);
templateContext.set("currentSone", currentSone);
templateContext.set("localSones", webInterface.getCore().getLocalSones());
try {
postTemplate.render(templateContext, stringWriter);
} catch (TemplateException te1) {
/* TODO - shouldn’t happen. */
} finally {
Closer.close(stringWriter);
}
jsonPost.put("html", stringWriter.toString());
return jsonPost;
}
}