content: /*
   * Copyright 2024-2025 the original author or authors.
   *
   * 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
   *
   *      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.alibaba.cloud.ai.graph.utils;
  
  import org.springframework.util.StringUtils;
  
  import java.util.Map;
  import java.util.Optional;
  import java.util.UUID;
  import java.util.concurrent.ConcurrentHashMap;
  
  public class InMemoryFileStorage {
  
  	private static final Map<String, FileRecord> CACHE = new ConcurrentHashMap<>();
  
  	public static class FileRecord {
  
  		private final String id;
  
  		private final String fileKey;
  
  		private final String name;
  
  		private final String mimetype;
  
  		private final long size;
  
  		private final byte[] content;
  
  		public FileRecord(String id, String fileKey, String name, String mimetype, long size, byte[] content) {
  			this.id = id;
  			this.fileKey = fileKey;
  			this.name = name;
  			this.mimetype = mimetype;
  			this.size = size;
  			this.content = content;
  		}
  
  		public String getId() {
  			return id;
  		}
  
  		public String getFileKey() {
  			return fileKey;
  		}
  
  		public String getName() {
  			return name;
  		}
  
  		public String getMimetype() {
  			return mimetype;
  		}
  
  		public long getSize() {
  			return size;
  		}
  
  		public byte[] getContent() {
  			return content;
  		}
  
  	}
  
  	public static FileRecord save(byte[] content, String mimetype, String originalFilename) {
  		String id = UUID.randomUUID().toString();
  		String extension = Optional.of(org.springframework.http.MediaType.parseMediaType(mimetype).getSubtype())
  			.orElse("bin");
  		String filename = StringUtils.hasText(originalFilename) ? originalFilename : id + "." + extension;
  		String key = String.format("inmem://%s", id);
  		FileRecord record = new FileRecord(id, key, filename, mimetype, content.length, content);
  		CACHE.put(id, record);
  		return record;
  	}
  
  	public static FileRecord get(String id) {
  		return CACHE.get(id);
  	}
  
  	public static void remove(String id) {
  		CACHE.remove(id);
  	}
  
  	public static void clear() {
  		CACHE.clear();
  	}
  
  }
  