/** @file
  Main file for Touch shell level 3 function.

  Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved. <BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "UefiShellLevel3CommandsLib.h"

#include <Library/ShellLib.h>

/**
  Do the touch operation on a single handle.

  @param[in] Handle   The handle to update the date/time on.

  @retval EFI_ACCESS_DENIED The file referenced by Handle is read only.
  @retval EFI_SUCCESS       The operation was successful.
**/
EFI_STATUS
EFIAPI
TouchFileByHandle (
  IN EFI_HANDLE Handle
  )
{
  EFI_STATUS    Status;
  EFI_FILE_INFO *FileInfo;

  FileInfo = gEfiShellProtocol->GetFileInfo(Handle);
  if ((FileInfo->Attribute & EFI_FILE_READ_ONLY) != 0){
    return (EFI_ACCESS_DENIED);
  }
  Status = gRT->GetTime(&FileInfo->ModificationTime, NULL);
  ASSERT_EFI_ERROR(Status);
  CopyMem(&FileInfo->LastAccessTime, &FileInfo->ModificationTime, sizeof(EFI_TIME));

  Status = gEfiShellProtocol->SetFileInfo(Handle, FileInfo);

  FreePool(FileInfo);

  return (Status);
}

/**
  Touch a given file and potantially recurse down if it was a directory.

  @param[in] Name   The name of this file.
  @param[in] FS     The name of the file system this file is on.
  @param[in] Handle The handle of this file already opened.
  @param[in] Rec    TRUE to recurse if possible.

  @retval EFI_INVALID_PARAMETER A parameter was invalid.
  @retval EFI_SUCCESS           The operation was successful.
**/
EFI_STATUS
EFIAPI
DoTouchByHandle (
  IN CONST CHAR16       *Name,
  IN       CHAR16       *FS,
  IN SHELL_FILE_HANDLE  Handle,
  IN BOOLEAN            Rec
  )
{
  EFI_STATUS          Status;
  EFI_SHELL_FILE_INFO *FileList;
  EFI_SHELL_FILE_INFO *Walker;
  CHAR16              *TempSpot;

  Status      = EFI_SUCCESS;
  FileList    = NULL;
  Walker      = NULL;

  if (FS == NULL) {
    FS = StrnCatGrow(&FS, NULL, Name, 0);
    if (FS != NULL) {
      TempSpot = StrStr(FS, L"\\");
      if (TempSpot != NULL) {
        *TempSpot = CHAR_NULL;
      }
    }
  }
  if (FS == NULL) {
    return (EFI_INVALID_PARAMETER);
  }

  //
  // do it
  //
  Status = TouchFileByHandle(Handle);
  if (EFI_ERROR(Status)) {
    ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NO_OPEN), gShellLevel3HiiHandle, Name, Status);
    return (Status);
  }

  //
  // if it's a directory recurse...
  //
  if (FileHandleIsDirectory(Handle) == EFI_SUCCESS && Rec) {
    //
    // get each file under this directory
    //
    if (EFI_ERROR(gEfiShellProtocol->FindFilesInDir(Handle, &FileList))) {
      Status = EFI_INVALID_PARAMETER;
    }

    //
    // recurse on each
    //
    for (Walker = (EFI_SHELL_FILE_INFO *)GetFirstNode(&FileList->Link)
      ;  FileList != NULL && !IsNull(&FileList->Link, &Walker->Link) && !EFI_ERROR(Status)
      ;  Walker = (EFI_SHELL_FILE_INFO *)GetNextNode(&FileList->Link, &Walker->Link)
     ){
      if ( (StrCmp(Walker->FileName, L".") != 0)
        && (StrCmp(Walker->FileName, L"..") != 0)
       ){
        //
        // Open the file since we need that handle.
        //
        Status = gEfiShellProtocol->OpenFileByName (Walker->FullName, &Walker->Handle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE);
        if (EFI_ERROR(Status)) {
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NO_OPEN), gShellLevel3HiiHandle, Walker->FullName, Status);
          Status = EFI_ACCESS_DENIED;
        } else {
          Status = DoTouchByHandle(Walker->FullName, FS, Walker->Handle, TRUE);
          gEfiShellProtocol->CloseFile(Walker->Handle);
          Walker->Handle = NULL;
        }
      }
    }

    //
    // free stuff
    //
    if (FileList != NULL && EFI_ERROR(gEfiShellProtocol->FreeFileList(&FileList))) {
      Status = EFI_INVALID_PARAMETER;
    }
  }

  return (Status);
}

STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  {L"-r", TypeFlag},
  {NULL, TypeMax}
  };

/**
  Function for 'touch' command.

  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunTouch (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS          Status;
  LIST_ENTRY          *Package;
  CHAR16              *ProblemParam;
  CONST CHAR16        *Param;
  SHELL_STATUS        ShellStatus;
  UINTN               ParamCount;
  EFI_SHELL_FILE_INFO *FileList;
  EFI_SHELL_FILE_INFO *Node;

  ProblemParam        = NULL;
  ShellStatus         = SHELL_SUCCESS;
  ParamCount          = 0;
  FileList            = NULL;

  //
  // initialize the shell lib (we must be in non-auto-init...)
  //
  Status = ShellInitialize();
  ASSERT_EFI_ERROR(Status);

  Status = CommandInit();
  ASSERT_EFI_ERROR(Status);

  //
  // parse the command line
  //
  Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
  if (EFI_ERROR(Status)) {
    if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, ProblemParam);
      FreePool(ProblemParam);
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      ASSERT(FALSE);
    }
  } else {
    //
    // check for "-?"
    //
    if (ShellCommandLineGetFlag(Package, L"-?")) {
      ASSERT(FALSE);
    }
    if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
      //
      // we insufficient parameters
      //
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel3HiiHandle);
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      //
      // get a list with each file specified by parameters
      // if parameter is a directory then add all the files below it to the list
      //
      for ( ParamCount = 1, Param = ShellCommandLineGetRawValue(Package, ParamCount)
          ; Param != NULL
          ; ParamCount++, Param = ShellCommandLineGetRawValue(Package, ParamCount)
         ){
        Status = ShellOpenFileMetaArg((CHAR16*)Param, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE, &FileList);
        if (EFI_ERROR(Status)) {
          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, (CHAR16*)Param);
          ShellStatus = SHELL_NOT_FOUND;
          break;
        }
        //
        // make sure we completed the param parsing sucessfully...
        // Also make sure that any previous action was sucessful
        //
        if (ShellStatus == SHELL_SUCCESS) {
          //
          // check that we have at least 1 file
          //
          if (FileList == NULL || IsListEmpty(&FileList->Link)) {
            ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NF), gShellLevel3HiiHandle, Param);
            continue;
          } else {
            //
            // loop through the list and make sure we are not aborting...
            //
            for ( Node = (EFI_SHELL_FILE_INFO*)GetFirstNode(&FileList->Link)
                ; !IsNull(&FileList->Link, &Node->Link) && !ShellGetExecutionBreakFlag()
                ; Node = (EFI_SHELL_FILE_INFO*)GetNextNode(&FileList->Link, &Node->Link)
               ){
              //
              // make sure the file opened ok
              //
              if (EFI_ERROR(Node->Status)){
                ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NO_OPEN), gShellLevel3HiiHandle, Node->FileName, Node->Status);
                ShellStatus = SHELL_NOT_FOUND;
                continue;
              }

              Status = DoTouchByHandle(Node->FullName, NULL, Node->Handle, ShellCommandLineGetFlag(Package, L"-r"));
              if (EFI_ERROR(Status) && Status != EFI_ACCESS_DENIED) {
                ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_NO_OPEN), gShellLevel3HiiHandle, Node->FileName, Status);
                ShellStatus = SHELL_NOT_FOUND;
              }
            }
          }
        }
        //
        // Free the fileList
        //
        if (FileList != NULL && !IsListEmpty(&FileList->Link)) {
          Status = ShellCloseFileMetaArg(&FileList);
          ASSERT_EFI_ERROR(Status);
        }
        FileList = NULL;
      }
    }

    //
    // free the command line package
    //
    ShellCommandLineFreeVarList (Package);
  }

  if (ShellGetExecutionBreakFlag()) {
    return (SHELL_ABORTED);
  }

  return (ShellStatus);
}