/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/*
Copyright (c) 2002-2018 ymnk, JCraft,Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright 
     notice, this list of conditions and the following disclaimer in 
     the documentation and/or other materials provided with the distribution.

  3. The names of the authors may not be used to endorse or promote products
     derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.jcraft.jsch;

import java.text.SimpleDateFormat;
import java.util.Date;

/*
  uint32   flags
  uint64   size           present only if flag SSH_FILEXFER_ATTR_SIZE
  uint32   uid            present only if flag SSH_FILEXFER_ATTR_UIDGID
  uint32   gid            present only if flag SSH_FILEXFER_ATTR_UIDGID
  uint32   permissions    present only if flag SSH_FILEXFER_ATTR_PERMISSIONS
  uint32   atime          present only if flag SSH_FILEXFER_ACMODTIME
  uint32   mtime          present only if flag SSH_FILEXFER_ACMODTIME
  uint32   extended_count present only if flag SSH_FILEXFER_ATTR_EXTENDED
  string   extended_type
  string   extended_data
    ...      more extended data (extended_type - extended_data pairs),
             so that number of pairs equals extended_count
*/
public class SftpATTRS {

  static final int S_ISUID = 04000; // set user ID on execution
  static final int S_ISGID = 02000; // set group ID on execution
  static final int S_ISVTX = 01000; // sticky bit   ****** NOT DOCUMENTED *****

  static final int S_IRUSR = 00400; // read by owner
  static final int S_IWUSR = 00200; // write by owner
  static final int S_IXUSR = 00100; // execute/search by owner
  static final int S_IREAD = 00400; // read by owner
  static final int S_IWRITE= 00200; // write by owner
  static final int S_IEXEC = 00100; // execute/search by owner

  static final int S_IRGRP = 00040; // read by group
  static final int S_IWGRP = 00020; // write by group
  static final int S_IXGRP = 00010; // execute/search by group

  static final int S_IROTH = 00004; // read by others
  static final int S_IWOTH = 00002; // write by others
  static final int S_IXOTH = 00001; // execute/search by others

  private static final int pmask = 0xFFF;

  public String getPermissionsString() {
    StringBuffer buf = new StringBuffer(10);

    if(isDir()) buf.append('d');
    else if(isLink()) buf.append('l');
    else buf.append('-');

    if((permissions & S_IRUSR)!=0) buf.append('r');
    else buf.append('-');

    if((permissions & S_IWUSR)!=0) buf.append('w');
    else buf.append('-');

    if((permissions & S_ISUID)!=0) buf.append('s');
    else if ((permissions & S_IXUSR)!=0) buf.append('x');
    else buf.append('-');

    if((permissions & S_IRGRP)!=0) buf.append('r');
    else buf.append('-');

    if((permissions & S_IWGRP)!=0) buf.append('w');
    else buf.append('-');

    if((permissions & S_ISGID)!=0) buf.append('s');
    else if((permissions & S_IXGRP)!=0) buf.append('x');
    else buf.append('-');

    if((permissions & S_IROTH) != 0) buf.append('r');
    else buf.append('-');

    if((permissions & S_IWOTH) != 0) buf.append('w');
    else buf.append('-');

    if((permissions & S_IXOTH) != 0) buf.append('x');
    else buf.append('-');
    return (buf.toString());
  }

  public String  getAtimeString(){
    Date date= new Date(((long)atime)*1000L);
    return (date.toString());
  }

  public String  getMtimeString(){
    Date date= new Date(((long)mtime)*1000L);
    return (date.toString());
  }

  public static final int SSH_FILEXFER_ATTR_SIZE=         0x00000001;
  public static final int SSH_FILEXFER_ATTR_UIDGID=       0x00000002;
  public static final int SSH_FILEXFER_ATTR_PERMISSIONS=  0x00000004;
  public static final int SSH_FILEXFER_ATTR_ACMODTIME=    0x00000008;
  public static final int SSH_FILEXFER_ATTR_EXTENDED=     0x80000000;

  static final int S_IFMT=0xf000;
  static final int S_IFIFO=0x1000;
  static final int S_IFCHR=0x2000;
  static final int S_IFDIR=0x4000;
  static final int S_IFBLK=0x6000;
  static final int S_IFREG=0x8000;
  static final int S_IFLNK=0xa000;
  static final int S_IFSOCK=0xc000;

  int flags=0;
  long size;
  int uid;
  int gid;
  int permissions;
  int atime;
  int mtime;
  String[] extended=null;

  private SftpATTRS(){
  }

  static SftpATTRS getATTR(Buffer buf){
    SftpATTRS attr=new SftpATTRS();	
    attr.flags=buf.getInt();
    if((attr.flags&SSH_FILEXFER_ATTR_SIZE)!=0){ attr.size=buf.getLong(); }
    if((attr.flags&SSH_FILEXFER_ATTR_UIDGID)!=0){
      attr.uid=buf.getInt(); attr.gid=buf.getInt();
    }
    if((attr.flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0){ 
      attr.permissions=buf.getInt();
    }
    if((attr.flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ 
      attr.atime=buf.getInt();
    }
    if((attr.flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ 
      attr.mtime=buf.getInt(); 
    }
    if((attr.flags&SSH_FILEXFER_ATTR_EXTENDED)!=0){
      int count=buf.getInt();
      if(count>0){
	attr.extended=new String[count*2];
	for(int i=0; i<count; i++){
	  attr.extended[i*2]=Util.byte2str(buf.getString());
	  attr.extended[i*2+1]=Util.byte2str(buf.getString());
	}
      }
    }
    return attr;
  } 

  int length(){
    int len=4;

    if((flags&SSH_FILEXFER_ATTR_SIZE)!=0){ len+=8; }
    if((flags&SSH_FILEXFER_ATTR_UIDGID)!=0){ len+=8; }
    if((flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0){ len+=4; }
    if((flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ len+=8; }
    if((flags&SSH_FILEXFER_ATTR_EXTENDED)!=0 && extended!=null){
      len+=4;
      int count=extended.length/2;
      if(count>0){
	for(int i=0; i<count; i++){
	  len+=4; len+=extended[i*2].length();
	  len+=4; len+=extended[i*2+1].length();
	}
      }
    }
    return len;
  }

  void dump(Buffer buf){
    buf.putInt(flags);
    if((flags&SSH_FILEXFER_ATTR_SIZE)!=0){ buf.putLong(size); }
    if((flags&SSH_FILEXFER_ATTR_UIDGID)!=0){
      buf.putInt(uid); buf.putInt(gid);
    }
    if((flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0){ 
      buf.putInt(permissions);
    }
    if((flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ buf.putInt(atime); }
    if((flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ buf.putInt(mtime); }
    if((flags&SSH_FILEXFER_ATTR_EXTENDED)!=0 && extended!=null){
      int count=extended.length/2;
      if(count>0){
	for(int i=0; i<count; i++){
	  buf.putString(Util.str2byte(extended[i*2]));
	  buf.putString(Util.str2byte(extended[i*2+1]));
	}
      }
    }
  }
  void setFLAGS(int flags){
    this.flags=flags;
  }
  public void setSIZE(long size){
    flags|=SSH_FILEXFER_ATTR_SIZE;
    this.size=size;
  }
  public void setUIDGID(int uid, int gid){
    flags|=SSH_FILEXFER_ATTR_UIDGID;
    this.uid=uid;
    this.gid=gid;
  }
  public void setACMODTIME(int atime, int mtime){
    flags|=SSH_FILEXFER_ATTR_ACMODTIME;
    this.atime=atime;
    this.mtime=mtime;
  }
  public void setPERMISSIONS(int permissions){
    flags|=SSH_FILEXFER_ATTR_PERMISSIONS;
    permissions=(this.permissions&~pmask)|(permissions&pmask);
    this.permissions=permissions;
  }

  private boolean isType(int mask) {
    return (flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0 &&
           (permissions&S_IFMT)==mask;
  }

  public boolean isReg(){
    return isType(S_IFREG);
  }

  public boolean isDir(){
    return isType(S_IFDIR);
  }      

  public boolean isChr(){
    return isType(S_IFCHR);
  }      

  public boolean isBlk(){
    return isType(S_IFBLK);
  }      

  public boolean isFifo(){
    return isType(S_IFIFO);
  }      

  public boolean isLink(){
    return isType(S_IFLNK);
  }

  public boolean isSock(){
    return isType(S_IFSOCK);
  }

  public int getFlags() { return flags; }
  public long getSize() { return size; }
  public int getUId() { return uid; }
  public int getGId() { return gid; }
  public int getPermissions() { return permissions; }
  public int getATime() { return atime; }
  public int getMTime() { return mtime; }
  public String[] getExtended() { return extended; }

  public String toString() {
    return (getPermissionsString()+" "+getUId()+" "+getGId()+" "+getSize()+" "+getMtimeString());
  }
  /*
  public String toString(){
    return (((flags&SSH_FILEXFER_ATTR_SIZE)!=0) ? ("size:"+size+" ") : "")+
           (((flags&SSH_FILEXFER_ATTR_UIDGID)!=0) ? ("uid:"+uid+",gid:"+gid+" ") : "")+
           (((flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0) ? ("permissions:0x"+Integer.toHexString(permissions)+" ") : "")+
           (((flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0) ? ("atime:"+atime+",mtime:"+mtime+" ") : "")+
           (((flags&SSH_FILEXFER_ATTR_EXTENDED)!=0) ? ("extended:?"+" ") : "");
  }
  */
}
