com.silverpeas.gallery.constant.StreamingProvider.java Source code

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Here is the source code for com.silverpeas.gallery.constant.StreamingProvider.java

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/*
 * Copyright (C) 2000 - 2014 Silverpeas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception. You should have recieved a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.silverpeas.gallery.constant;

import com.silverpeas.util.StringUtil;
import org.apache.commons.collections.set.UnmodifiableSet;
import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonValue;

import java.util.ArrayList;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author: Yohann Chastagnier
 */
public enum StreamingProvider {
    unknown(null), youtube("(?i)(\\?|&)v=([a-z0-9]+)", "youtu"), vimeo("(?i)(/|=)([0-9]+)");

    public static final Set<StreamingProvider> ALL_VALIDS;

    private final Pattern isExtractorPattern;
    private final List<String> regexpDetectionParts;

    static {
        Set<StreamingProvider> allValids = EnumSet.allOf(StreamingProvider.class);
        allValids.remove(unknown);
        //noinspection unchecked
        ALL_VALIDS = UnmodifiableSet.decorate(allValids);
    }

    StreamingProvider(final String idExtractorPattern, final String... regexpDetectionParts) {
        if (StringUtil.isDefined(idExtractorPattern)) {
            isExtractorPattern = Pattern.compile(idExtractorPattern);
        } else {
            isExtractorPattern = null;
        }
        this.regexpDetectionParts = new ArrayList<String>();
        this.regexpDetectionParts.add(name());
        Collections.addAll(this.regexpDetectionParts, regexpDetectionParts);
    }

    /**
     * Retrieves from the specified string the streaming provider.
     * @param provider the exact string of the provider (it is not case sensitive)
     * @return the streaming provider found if any, {@link #unknown} otherwise.
     */
    @JsonCreator
    public static StreamingProvider from(String provider) {
        try {
            return valueOf(provider.toLowerCase());
        } catch (Exception e) {
            return unknown;
        }
    }

    /**
     * Retrieves from the specified string the streaming provider.
     * @param streamingUrl the exact string of the provider (it is not case sensitive)
     * @return the streaming provider found if any, {@link #unknown} otherwise.
     */
    public static StreamingProvider fromUrl(String streamingUrl) {
        if (StringUtil.isDefined(streamingUrl)) {
            for (StreamingProvider streamingProvider : ALL_VALIDS) {
                for (String name : streamingProvider.getRegexpDetectionParts()) {
                    if (Pattern.compile(name).matcher(streamingUrl.toLowerCase()).find()) {
                        return streamingProvider;
                    }
                }
            }
        }
        return unknown;
    }

    @JsonValue
    public String getName() {
        return name();
    }

    /**
     * Gets the regexp detection parts
     * @return
     */
    public List<String> getRegexpDetectionParts() {
        return regexpDetectionParts;
    }

    /**
     * Indicates if the provider is an unknown one.
     * @return true if unknown, false otherwise.
     */
    public boolean isUnknown() {
        return this == unknown;
    }

    /**
     * Gets the identifier of the stream from an url.
     * @param url
     * @return
     */
    public String extractStreamingId(String url) {
        Matcher matcher = isExtractorPattern.matcher(url);
        if (matcher.find()) {
            return matcher.group(2);
        }
        return "";
    }
}