001/*
002 * (C) Copyright 2006-2008 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Alexandre Russel
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.platform.annotations.gwt.client.annotea;
023
024import org.nuxeo.ecm.platform.annotations.gwt.client.configuration.WebConfiguration;
025import org.nuxeo.ecm.platform.annotations.gwt.client.controler.AnnotationController;
026import org.nuxeo.ecm.platform.annotations.gwt.client.model.Annotation;
027
028import com.allen_sauer.gwt.log.client.Log;
029import com.google.gwt.core.client.GWT;
030import com.google.gwt.http.client.Request;
031import com.google.gwt.http.client.RequestBuilder;
032import com.google.gwt.http.client.RequestCallback;
033import com.google.gwt.http.client.RequestException;
034import com.google.gwt.http.client.Response;
035import com.google.gwt.http.client.URL;
036import com.google.gwt.user.client.Window;
037
038/**
039 * @author Alexandre Russel
040 */
041public class AnnoteaClient {
042
043    private static AnnoteaResponseManager responseManager;
044
045    private static WebConfiguration webConfiguration;
046
047    private RequestBuilder postRequest;
048
049    private static AnnotationController controller;
050
051    public AnnoteaClient(AnnotationController annotationController) {
052        controller = annotationController;
053        responseManager = new AnnoteaResponseManager(annotationController);
054        webConfiguration = annotationController.getWebConfiguration();
055    }
056
057    public void submitAnnotation(Annotation newAnnotation) {
058        AnnotationXmlGenerator xmlGenerator = new AnnotationXmlGenerator(webConfiguration, newAnnotation);
059        String request = xmlGenerator.generateXml();
060        postRequest = new RequestBuilder(RequestBuilder.POST, URL.encode(controller.getAnnoteaServerUrl()));
061        try {
062            postRequest.sendRequest(request, new RequestCallback() {
063                public void onError(Request request, Throwable exception) {
064                    Window.alert("Error while sending data to annotea server: " + exception.toString());
065                }
066
067                public void onResponseReceived(Request request, Response response) {
068                    responseManager.processSubmitAnnotationResponse(response.getText());
069                    getAnnotationList(controller.getDocumentUrl());
070                    controller.reloadAnnotations();
071                }
072            });
073        } catch (RequestException e) {
074            GWT.log("Error while sending new annotation", e);
075            Log.debug("Error while sending new annotation", e);
076        }
077    }
078
079    public void getAnnotationList(String annotates) {
080        getAnnotationList(annotates, false);
081    }
082
083    public void getAnnotationList(String annotates, final boolean forceDecorate) {
084        if (annotates.contains("?")) {
085            annotates = annotates.substring(0, annotates.indexOf('?'));
086        }
087        String url = controller.getAnnoteaServerUrl() + "?w3c_annotates=" + annotates;
088        RequestBuilder getRequest = new RequestBuilder(RequestBuilder.GET, URL.encode(url));
089        try {
090            getRequest.sendRequest(null, new RequestCallback() {
091                public void onError(Request request, Throwable exception) {
092                }
093
094                public void onResponseReceived(Request request, Response response) {
095                    responseManager.processAnnotationListResponse(response.getText());
096                    if (forceDecorate) {
097                        // Force all the annotations to be redecorated
098                        controller.updateAnnotations(true);
099                    }
100                }
101            });
102        } catch (RequestException e) {
103            GWT.log("Error while requesting annotations: " + url, e);
104            Log.debug("Error while requesting annotations: " + url, e);
105            Window.alert(e.toString());
106        }
107    }
108
109    public void deleteAnnotation(String annotates, final Annotation annotation) {
110        if (annotates.contains("?")) {
111            annotates = annotates.substring(0, annotates.indexOf('?'));
112        }
113
114        String url = controller.getAnnoteaServerUrl() + "/" + annotation.getUUID();
115        url += "?document_url=" + annotates;
116        RequestBuilder req = new RequestBuilder("DELETE", url) {
117            // nothing to override... used to make a *real* HTTP DELETE request
118        };
119
120        try {
121            req.sendRequest(null, new RequestCallback() {
122                public void onError(Request arg0, Throwable arg1) {
123                }
124
125                public void onResponseReceived(Request arg0, Response arg1) {
126                    getAnnotationList(Window.Location.getHref(), true);
127                    controller.reloadAnnotations();
128                }
129            });
130        } catch (RequestException e) {
131            GWT.log("Error while deleting an annotation: " + url, e);
132            Log.debug("Error while deleting an annotation: " + url, e);
133        }
134    }
135
136}