/**
* Copyright (c) 2014-2017 by the respective copyright holders.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.eclipse.smarthome.extensionservice.marketplace.automation.internal;
import java.io.IOException;
import java.net.URL;
import org.apache.commons.io.IOUtils;
import org.eclipse.smarthome.automation.template.RuleTemplateProvider;
import org.eclipse.smarthome.core.storage.Storage;
import org.eclipse.smarthome.extensionservice.marketplace.MarketplaceExtension;
import org.eclipse.smarthome.extensionservice.marketplace.MarketplaceExtensionHandler;
import org.eclipse.smarthome.extensionservice.marketplace.MarketplaceHandlerException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A {@link MarketplaceExtensionHandler} implementation, which handles rule templates as JSON files and installs
* them by adding them to a {@link Storage}. The templates are then served from this storage through a dedicated
* {@link RuleTemplateProvider}.
*
* @author Kai Kreuzer - Initial contribution and API
*
*/
public class AutomationExtensionHandler implements MarketplaceExtensionHandler {
private final Logger logger = LoggerFactory.getLogger(AutomationExtensionHandler.class);
private MarketplaceRuleTemplateProvider marketplaceRuleTemplateProvider;
protected void setMarketplaceRuleTemplateProvider(MarketplaceRuleTemplateProvider marketplaceRuleTemplateProvider) {
this.marketplaceRuleTemplateProvider = marketplaceRuleTemplateProvider;
}
protected void unsetMarketplaceRuleTemplateProvider(
MarketplaceRuleTemplateProvider marketplaceRuleTemplateProvider) {
this.marketplaceRuleTemplateProvider = null;
}
@Override
public boolean supports(MarketplaceExtension ext) {
// we support only rule templates in JSON format so far
return ext.getType().equals(MarketplaceExtension.EXT_TYPE_RULE_TEMPLATE)
&& ext.getPackageFormat().equals(MarketplaceExtension.EXT_FORMAT_JSON);
}
@Override
public boolean isInstalled(MarketplaceExtension ext) {
return marketplaceRuleTemplateProvider.get(ext.getId()) != null;
}
@Override
public void install(MarketplaceExtension ext) throws MarketplaceHandlerException {
String url = ext.getDownloadUrl();
try {
String template = getTemplate(url);
marketplaceRuleTemplateProvider.addTemplateAsJSON(ext.getId(), template);
} catch (IOException e) {
logger.error("Rule template from marketplace cannot be downloaded: {}", e.getMessage());
throw new MarketplaceHandlerException("Template cannot be downloaded.");
} catch (Exception e) {
logger.error("Rule template from marketplace is invalid: {}", e.getMessage());
throw new MarketplaceHandlerException("Template is not valid.");
}
}
@Override
public void uninstall(MarketplaceExtension ext) throws MarketplaceHandlerException {
marketplaceRuleTemplateProvider.remove(ext.getId());
}
private String getTemplate(String urlString) throws IOException {
URL url = new URL(urlString);
return IOUtils.toString(url);
}
}