/*
    * Copyright 2017 LINE Corporation
    *
    * LINE Corporation licenses this file to you 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:
    *
    *   https://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.linecorp.centraldogma.common;
  
  import static java.util.Objects.requireNonNull;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.google.common.base.Ascii;
  
  /**
   * The type of an {@link Entry}.
   */
  public enum EntryType {
      /**
       * A UTF-8 encoded JSON file.
       */
      JSON(JsonNode.class),
      /**
       * A UTF-8 encoded text file.
       */
      TEXT(String.class),
      /**
       * A directory.
       */
      DIRECTORY(Void.class);
  
      /**
       * Guesses the {@link EntryType} from the specified {@code path}.
       */
      public static EntryType guessFromPath(String path) {
          requireNonNull(path, "path");
          if (path.isEmpty()) {
              throw new IllegalArgumentException("empty path");
          }
  
          if (path.charAt(path.length() - 1) == '/') {
              return DIRECTORY;
          }
  
          if (Ascii.toLowerCase(path).endsWith(".json")) {
              return JSON;
          }
  
          return TEXT;
      }
  
      private final Class<?> type;
  
      EntryType(Class<?> type) {
          this.type = type;
      }
  
      /**
       * Returns the type of the content returned by {@link Entry#content()}.
       */
      public Class<?> type() {
          return type;
      }
  }