/*
* 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.iosched.model.validator;
import com.google.gson.JsonPrimitive;
import java.text.MessageFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class YoutubeURLConverter extends Converter {
private boolean acceptsNull;
private static Pattern[] patterns = {
Pattern.compile("youtube\\.com\\/watch\\?v=([^&?/]+)"),
Pattern.compile("youtube\\.com\\/embed\\/([^&?/]+)"),
Pattern.compile("youtube\\.com\\/v\\/([^&?/]+)"),
Pattern.compile("youtu\\.be\\/([^&?/]+)"),
Pattern.compile("^([A-Za-z0-9_-]{11})$")
};
private static final MessageFormat outFormat = new MessageFormat("https://youtu.be/{0}");
public YoutubeURLConverter(boolean acceptsNull) {
this.acceptsNull = acceptsNull;
}
@Override
public JsonPrimitive convert(JsonPrimitive value) {
if (value == null) {
if (acceptsNull) {
return null;
} else {
throw new ConverterException(value, this);
}
}
String str = value.getAsString();
if (acceptsNull && str.isEmpty()) {
return value;
}
for (Pattern p: patterns) {
Matcher m = p.matcher(str);
if (m.find()) {
return new JsonPrimitive(outFormat.format(new String[]{m.group(1)}));
}
}
throw new ConverterException(value, this);
}
}