/**
* Copyright 2010 Google Inc.
*
* 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.waveprotocol.wave.model.gadget;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.AUTHOR_ATTRIBUTE;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.CATEGORY_TAGNAME;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.KEY_ATTRIBUTE;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.PREFS_ATTRIBUTE;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.PREF_TAGNAME;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.STATE_ATTRIBUTE;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.STATE_TAGNAME;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.TAGNAME;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.TITLE_ATTRIBUTE;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.TITLE_TAGNAME;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.URL_ATTRIBUTE;
import static org.waveprotocol.wave.model.gadget.GadgetConstants.VALUE_ATTRIBUTE;
import org.waveprotocol.wave.model.document.util.XmlStringBuilder;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Static methods to produce Wave Gadget XML elements.
*
*/
public final class GadgetXmlUtil {
private GadgetXmlUtil() {} // Non-instantiable.
/**
* Returns initialized XML string builder for the gadget.
*
* @param url that points to the XML definition of this gadget.
* @return content XML string for the gadget.
*/
public static XmlStringBuilder constructXml(String url, String author) {
return constructXml(url, "", author);
}
/**
* Returns initialized XML string builder for the gadget with initial prefs.
*
* @param url that points to the XML definition of this gadget.
* @param prefs initial gadget preferences as escaped JSON string.
* @return content XML string for the gadget.
*/
public static XmlStringBuilder constructXml(String url, String prefs, String author) {
return constructXml(url, prefs, author, null, null);
}
/**
* Returns initialized XML string builder for the gadget with initial prefs.
*
* @param url that points to the XML definition of this gadget.
* @param prefs initial gadget preferences as escaped JSON string.
* @param categories array of category names for the gadget (e.g. ["game",
* "chess"]).
* @param state the initial gadget state.
* @return content XML string for the gadget.
*/
public static XmlStringBuilder constructXml(String url, String prefs, String author,
@Nullable String[] categories, @Nullable Map<String, String> state) {
final XmlStringBuilder builder = XmlStringBuilder.createEmpty();
if (categories != null) {
for (int i = 0; i < categories.length; ++i) {
builder.append(
XmlStringBuilder.createText("").wrap(
CATEGORY_TAGNAME, KEY_ATTRIBUTE, categories[i]));
}
}
if (state != null) {
for (Map.Entry<String, String> entry : state.entrySet()) {
builder.append(
GadgetXmlUtil.constructStateXml(entry.getKey(), entry.getValue()));
}
}
builder.wrap(
TAGNAME,
URL_ATTRIBUTE, url,
TITLE_ATTRIBUTE, "",
PREFS_ATTRIBUTE, prefs != null ? prefs : "",
STATE_ATTRIBUTE, "",
// TODO(user): Implement finer author management for gadgets.
AUTHOR_ATTRIBUTE, author);
return builder;
}
/**
* Returns initialized XML string builder for a gadget categories element.
*
* @param categories the categories.
* @return XML builder for the name element.
*/
public static XmlStringBuilder constructCategoriesXml(String categories) {
return XmlStringBuilder.createText("")
.wrap(CATEGORY_TAGNAME, KEY_ATTRIBUTE, categories);
}
/**
* Returns initialized XML string builder for a gadget title element.
*
* @param title the title value
* @return XML builder for the title element
*/
public static XmlStringBuilder constructTitleXml(String title) {
return XmlStringBuilder.createText("").wrap(TITLE_TAGNAME, VALUE_ATTRIBUTE, title);
}
/**
* Returns initialized XML string builder for a gadget element.
*
* @param tag element tag
* @param key the key
* @param value the value
* @return XML string builder for the state element
*/
public static XmlStringBuilder constructElementXml(String tag, String key, String value) {
return XmlStringBuilder.createText("").wrap(tag, KEY_ATTRIBUTE, key, VALUE_ATTRIBUTE, value);
}
/**
* Returns initialized XML string builder for a gadget state element.
*
* @param key the key
* @param value the value
* @return XML string builder for the state element
*/
public static XmlStringBuilder constructStateXml(String key, String value) {
return XmlStringBuilder.createText("").wrap(
STATE_TAGNAME, KEY_ATTRIBUTE, key, VALUE_ATTRIBUTE, value);
}
/**
* Returns initialized XML string builder for a gadget user pref element.
*
* @param key the key
* @param value the value
* @return XML string builder for the state element
*/
public static XmlStringBuilder constructPrefXml(String key, String value) {
return XmlStringBuilder.createText("").wrap(
PREF_TAGNAME, KEY_ATTRIBUTE, key, VALUE_ATTRIBUTE, value);
}
}