# MediaMimeType.java

    /*
     * Copyright (C) 2000 - 2024 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:
     * "https://www.silverpeas.org/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 <https://www.gnu.org/licenses/>.
     */

    package org.silverpeas.components.gallery.constant;

    import org.silverpeas.core.util.StringUtil;
    import org.silverpeas.core.util.file.FileUtil;

    import javax.activation.MimeType;
    import javax.activation.MimeTypeParseException;
    import java.io.File;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.EnumSet;
    import java.util.List;
    import java.util.Set;

    /**
     * Enumeration for all supported media types in the gallery component.
     */
    public enum MediaMimeType {
      BMP, GIF, PNG, JPG("jpeg", "pjpeg"), TIFF("tif"),
      MOV, MP4, FLV,
      MP3,
      ERROR;

      @SuppressWarnings("unchecked")
      public static final Set<MediaMimeType> PHOTOS =
          Collections.unmodifiableSet(EnumSet.of(BMP, GIF, PNG, JPG, TIFF));
      @SuppressWarnings("unchecked")
      public static final Set<MediaMimeType> VIDEOS =
          Collections.unmodifiableSet(EnumSet.of(MOV, MP4, FLV));
      @SuppressWarnings("unchecked")
      public static final Set<MediaMimeType> SOUNDS = Collections.unmodifiableSet(EnumSet.of(MP3));

      private static final Set<MediaMimeType> ALL_VALIDS = EnumSet.allOf(MediaMimeType.class);

      static {
        ALL_VALIDS.remove(ERROR);
      }

      private final String mimeType;
      private final List<String> extensions;

      MediaMimeType(String... otherExtensions) {
        String identifiedMimeType;
        try {
          identifiedMimeType = ("ERROR".equals(this.name()) ? "" :
              new MimeType(FileUtil.getMimeType("file." + this.name().toLowerCase()))).toString();
        } catch (MimeTypeParseException e) {
          identifiedMimeType = javax.ws.rs.core.MediaType.APPLICATION_OCTET_STREAM;
        }
        mimeType = identifiedMimeType;
        extensions = new ArrayList<>();
        extensions.add(name().toLowerCase());
        Collections.addAll(extensions, otherExtensions);
      }

      /**
       * Finds from the given file the corresponding {@link MediaMimeType}
       * @param file
       * @return {@link MediaMimeType}
       */
      public static MediaMimeType fromFile(File file) {
        return fromMimeType(file != null ? FileUtil.getMimeType(file.getPath()) : "");
      }

      /**
       * Gets the corresponding {@link MediaMimeType} of specified one as string.
       * @param mimeType
       * @return {@link MediaMimeType}
       */
      public static MediaMimeType fromMimeType(String mimeType) {
        if (StringUtil.isDefined(mimeType)) {
          // This test is to keep compatibility with existent galleries.
          // With IE7 uploading, it was possible to obtain this mime-type...
          if ("image/pjpeg".equals(mimeType)) {
            return JPG;
          }
          if ("video/m4v".equals(mimeType.replace("/x-", "/"))) {
            return MP4;
          }
          for (MediaMimeType mediaMimeType : ALL_VALIDS) {
            if (mediaMimeType.mimeType.equals(mimeType) ||
                mediaMimeType.mimeType.equals(mimeType.replace("x-ms-", ""))) {
              return mediaMimeType;
            }
          }
        }
        return ERROR;
      }

      /**
       * Gets the name (useful for JSTL use)
       * @return
       */
      public String getName() {
        return name();
      }

      /**
       * Gets the mime type as string.
       * @return
       */
      public String getMimeType() {
        return mimeType;
      }

      /**
       * Gets supported extensions.
       * @return
       */
      public List<String> getExtensions() {
        return extensions;
      }

      /**
       * Indicates if the mime type is one of handled media types.
       * @return true if it is a handled one, false otherwise.
       */
      public boolean isSupportedMediaType() {
        return ALL_VALIDS.contains(this);
      }

      /**
       * Indicates if the mime type is one of handled photo types.
       * @return true if it is a handled one, false otherwise.
       */
      public boolean isSupportedPhotoType() {
        return PHOTOS.contains(this);
      }

      /**
       * Indicates if the mime type is one of handled photo types.
       * @return true if it is a handled one, false otherwise.
       */
      public boolean isSupportedVideoType() {
        return VIDEOS.contains(this);
      }

      /**
       * Indicates if the mime type is one of handled photo types.
       * @return true if it is a handled one, false otherwise.
       */
      public boolean isSupportedSoundType() {
        return SOUNDS.contains(this);
      }

      /**
       * Indicates if the mime type is a photo one and if it is readable by ImageIo.
       * @return true if it is a photo media type that is readable by ImageIo
       * @see http://docs.oracle.com/javase/6/docs/api/javax/imageio/package-summary.html
       */
      @SuppressWarnings("JavadocReference")
      public boolean isReadablePhoto() {
        return this == GIF || this == JPG || this == PNG || this == BMP;
      }

      /**
       * Indicates if the mime type is one of photo and if it is previewable.
       * @return true if the mime type is one of a photo and if it is previewable, false otherwise.
       */
      public boolean isPreviewablePhoto() {
        return isReadablePhoto();
      }

      /**
       * Indicates if from the mime type can be read IPTC metadata.
       * @return true if IPTC can be read, false otherwise.
       */
      public boolean isIPTCCompliant() {
        return this == GIF || this == JPG || this == TIFF;
      }

      /**
       * Gets the supported mime types according to the given media type.
       * @param mediaType the aimed media type.
       * @return a set of media mime types.
       */
      public static Set<MediaMimeType> getSupportedMimeTypes(MediaType mediaType) {
        final Set<MediaMimeType> supportedMimeTypes;
        switch (mediaType) {
          case Photo:
            supportedMimeTypes = MediaMimeType.PHOTOS;
            break;
          case Video:
            supportedMimeTypes = MediaMimeType.VIDEOS;
            break;
          case Sound:
            supportedMimeTypes = MediaMimeType.SOUNDS;
            break;
          default:
            supportedMimeTypes =  EnumSet.noneOf(MediaMimeType.class);
        }
        return supportedMimeTypes;
      }
    }