com.google.iosched.model.validator.GPlusURLConverter.java Source code

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Here is the source code for com.google.iosched.model.validator.GPlusURLConverter.java

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/*
 * 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 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);
    }
}