/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "FileLocation.h"

#include "nsZipArchive.h"

#include "nsURLHelper.h"

namespace mozilla {

FileLocation::FileLocation() = default;

FileLocation::~FileLocation() = default;

FileLocation::FileLocation(nsIFile* aFile)

{

  Init(aFile);

}

FileLocation::FileLocation(nsIFile* aFile, const char* aPath)

{

  Init(aFile, aPath);

}

FileLocation::FileLocation(nsZipArchive* aZip, const char* aPath)

{

  Init(aZip, aPath);

}

FileLocation::FileLocation(const FileLocation& aOther)

  : mBaseFile(aOther.mBaseFile)

  , mBaseZip(aOther.mBaseZip)

  , mPath(aOther.mPath)

{

}

FileLocation::FileLocation(FileLocation&& aOther)

  : mBaseFile(std::move(aOther.mBaseFile))

  , mBaseZip(std::move(aOther.mBaseZip))

  , mPath(std::move(aOther.mPath))

{

  aOther.mPath.Truncate();

}

FileLocation::FileLocation(const FileLocation& aFile, const char* aPath)

{

  if (aFile.IsZip()) {

    if (aFile.mBaseFile) {

      Init(aFile.mBaseFile, aFile.mPath.get());

    }

    else {

      Init(aFile.mBaseZip, aFile.mPath.get());

    }

    if (aPath) {

      int32_t i = mPath.RFindChar('/');

      if (kNotFound == i) {

        mPath.Truncate(0);

      } else {

        mPath.Truncate(i + 1);

      }

      mPath += aPath;

    }

  } else {

    if (aPath) {

      nsCOMPtr<nsIFile> cfile;

      aFile.mBaseFile->GetParent(getter_AddRefs(cfile));

#if defined(XP_WIN)

      nsAutoCString pathStr(aPath);

      char* p;

      uint32_t len = pathStr.GetMutableData(&p);

      for (; len; ++p, --len) {

        if ('/' == *p) {

          *p = '\\';

        }

      }

      cfile->AppendRelativeNativePath(pathStr);

#else

      cfile->AppendRelativeNativePath(nsDependentCString(aPath));

#endif

      Init(cfile);

    } else {

      Init(aFile.mBaseFile);

    }

  }

}

void

FileLocation::Init(nsIFile* aFile)

{

  mBaseZip = nullptr;

  mBaseFile = aFile;

  mPath.Truncate();

}

void

FileLocation::Init(nsIFile* aFile, const char* aPath)

{

  mBaseZip = nullptr;

  mBaseFile = aFile;

  mPath = aPath;

}

void

FileLocation::Init(nsZipArchive* aZip, const char* aPath)

{

  mBaseZip = aZip;

  mBaseFile = nullptr;

  mPath = aPath;

}

void

FileLocation::GetURIString(nsACString& aResult) const

{

  if (mBaseFile) {

    net_GetURLSpecFromActualFile(mBaseFile, aResult);

  } else if (mBaseZip) {

    RefPtr<nsZipHandle> handler = mBaseZip->GetFD();

    handler->mFile.GetURIString(aResult);

  }

  if (IsZip()) {

    aResult.InsertLiteral("jar:", 0);

    aResult += "!/";

    aResult += mPath;

  }

}

already_AddRefed<nsIFile>

FileLocation::GetBaseFile()

{

  if (IsZip() && mBaseZip) {

    RefPtr<nsZipHandle> handler = mBaseZip->GetFD();

    if (handler) {

      return handler->mFile.GetBaseFile();

    }

    return nullptr;

  }

  nsCOMPtr<nsIFile> file = mBaseFile;

  return file.forget();

}

bool

FileLocation::Equals(const FileLocation& aFile) const

{

  if (mPath != aFile.mPath) {

    return false;

  }

  if (mBaseFile && aFile.mBaseFile) {

    bool eq;

    return NS_SUCCEEDED(mBaseFile->Equals(aFile.mBaseFile, &eq)) && eq;

  }

  const FileLocation* a = this;

  const FileLocation* b = &aFile;

  if (a->mBaseZip) {

    RefPtr<nsZipHandle> handler = a->mBaseZip->GetFD();

    a = &handler->mFile;

  }

  if (b->mBaseZip) {

    RefPtr<nsZipHandle> handler = b->mBaseZip->GetFD();

    b = &handler->mFile;

  }

  return a->Equals(*b);

}

nsresult

FileLocation::GetData(Data& aData)

{

  if (!IsZip()) {

    return mBaseFile->OpenNSPRFileDesc(PR_RDONLY, 0444, &aData.mFd.rwget());

  }

  aData.mZip = mBaseZip;

  if (!aData.mZip) {

    aData.mZip = new nsZipArchive();

    aData.mZip->OpenArchive(mBaseFile);

  }

  aData.mItem = aData.mZip->GetItem(mPath.get());

  if (aData.mItem) {

    return NS_OK;

  }

  return NS_ERROR_FILE_UNRECOGNIZED_PATH;

}

nsresult

FileLocation::Data::GetSize(uint32_t* aResult)

{

  if (mFd) {

    PRFileInfo64 fileInfo;

    if (PR_SUCCESS != PR_GetOpenFileInfo64(mFd, &fileInfo)) {

      return NS_ErrorAccordingToNSPR();

    }

    if (fileInfo.size > int64_t(UINT32_MAX)) {

      return NS_ERROR_FILE_TOO_BIG;

    }

    *aResult = fileInfo.size;

    return NS_OK;

  }

  if (mItem) {

    *aResult = mItem->RealSize();

    return NS_OK;

  }

  return NS_ERROR_NOT_INITIALIZED;

}

nsresult

FileLocation::Data::Copy(char* aBuf, uint32_t aLen)

{

  if (mFd) {

    for (uint32_t totalRead = 0; totalRead < aLen;) {

      int32_t read = PR_Read(mFd, aBuf + totalRead,

                             XPCOM_MIN(aLen - totalRead, uint32_t(INT32_MAX)));

      if (read < 0) {

        return NS_ErrorAccordingToNSPR();

      }

      totalRead += read;

    }

    return NS_OK;

  }

  if (mItem) {

    nsZipCursor cursor(mItem, mZip, reinterpret_cast<uint8_t*>(aBuf),

                       aLen, true);

    uint32_t readLen;

    cursor.Copy(&readLen);

    if (readLen != aLen) {

      nsZipArchive::sFileCorruptedReason = "FileLocation::Data: insufficient data";

      return NS_ERROR_FILE_CORRUPTED;

    }

    return NS_OK;

  }

  return NS_ERROR_NOT_INITIALIZED;

}

} /* namespace mozilla */