/*
* Copyright 2014 Google Inc. All rights reserved.
*
* 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 com.google.samples.apps.iosched.server.schedule.model.validator;
import com.google.gson.JsonPrimitive;
import java.text.MessageFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class GPlusURLConverter extends Converter {
private static Pattern[] plusRecognizedPatterns = {
Pattern.compile("(\\+[\\w]{2,})"), // +VanityUrl
Pattern.compile("([\\d]{20,})"), // /8759384579284782342/ (G+ ID)
};
private static final Pattern acceptableUrlPattern = Pattern.compile("https?:\\/\\/.+");
private static final MessageFormat plusFormat = new MessageFormat("https://plus.google.com/{0}");
@Override
public JsonPrimitive convert(JsonPrimitive value) {
if (value == null) {
return null;
}
String str = value.getAsString();
if (str.isEmpty()) {
return value;
}
for (Pattern p: plusRecognizedPatterns) {
Matcher m = p.matcher(str);
if (m.find()) {
return new JsonPrimitive(plusFormat.format(new String[]{m.group(1)}));
}
}
// If URL starts with http/https:
if (acceptableUrlPattern.matcher(str).matches()) {
return value;
}
// Otherwise, just add https://:
str = "https://" + str;
return new JsonPrimitive(str);
}
}