/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code, 
 * released March 31, 1998. 
 *
 * The Initial Developer of the Original Code is Netscape Communications 
 * Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 *     Samir Gehani <sgehani@netscape.com>
 */

#include "nsZipExtractor.h"

#define STANDALONE 1
#include "zipstub.h"
#include "zipfile.h"

nsZipExtractor::nsZipExtractor(char *aTmp) :
    mTmp(aTmp)
{
}

nsZipExtractor::~nsZipExtractor()
{
    // don't free mTmp: we don't own it
}

int
nsZipExtractor::Extract(nsComponent *aXPIEngine, int aTotal)
{
    DUMP("Extract");
   
    char apath[MAXPATHLEN]; /* archive path */
    char bindir[512];
    char zpath[MAXPATHLEN]; /* path of file in zip archive */
    char epath[MAXPATHLEN]; /* path of file after being extracted */
    char *leaf = NULL, *lslash = NULL;
    struct stat dummy;
    int i, bFoundAll = FALSE, err = OK;
    PRInt32 zerr = ZIP_OK;
    void *hZip = NULL, *hFind = NULL;

    if (!aXPIEngine || !(aXPIEngine->GetArchive()))
        return E_PARAM;

    sprintf(apath, "%s/%s", mTmp, aXPIEngine->GetArchive());
    if (-1 == stat(apath, &dummy))
        return E_NO_DOWNLOAD;

    /* initialize archive etc. 
     */
    zerr = ZIP_OpenArchive(apath, &hZip);
    if (zerr != ZIP_OK) return E_EXTRACTION;
    hFind = ZIP_FindInit(hZip, (const char *) NULL);
    if (!hFind)
    {
        err = E_EXTRACTION;
        goto au_revoir;
    }

    /* extract files 
     */
    i = 0;
    while (!bFoundAll)
    {
        memset(zpath, 0, MAXPATHLEN);
        zerr = ZIP_FindNext(hFind, zpath, MAXPATHLEN);
        if (zerr == ZIP_ERR_FNF)
        {
            bFoundAll = true;
            break;
        }
        if (zerr != ZIP_OK)
        {
            err = E_EXTRACTION;
            goto au_revoir;
        }

        /* directory encountered: ignore entry
         */
        lslash = strrchr(zpath, '/');
        if (lslash == (zpath + strlen(zpath) - 1))
            continue;

        if (!lslash)
            leaf = zpath;
        else
            leaf = lslash + 1;
        if (!leaf)
            continue;

        /* update UI
         */
        nsInstallDlg::MajorProgressCB(leaf, i, 
            aTotal, nsInstallDlg::ACT_EXTRACT);

        sprintf(epath, "%s/%s", mTmp, zpath);
        err = DirCreateRecursive(epath);
        if (err != OK) goto au_revoir;

        zerr = ZIP_ExtractFile(hZip, zpath, epath);
        if (zerr != ZIP_OK)
        {
            err = E_EXTRACTION;
            goto au_revoir;
        }

        i++;
    }
    
    sprintf(bindir, "%s/%s", mTmp, TMP_EXTRACT_SUBDIR);
    if (-1 == stat(bindir, &dummy))
        err = E_EXTRACTION;

au_revoir:
    /* close archive etc.
     */
    if (hFind)
        ZIP_FindFree(hFind);
    if (hZip)
        ZIP_CloseArchive(&hZip);
    return err;
}

int
nsZipExtractor::DirCreateRecursive(char *aPath)
{
    int err = OK;
    char *slash = NULL, *pathpos = NULL;
    char currdir[MAXPATHLEN];
    struct stat dummy;
    
    if (!aPath || !mTmp)
        return E_PARAM;

    slash = aPath + strlen(mTmp);
    if (*slash != '/')
        return E_INVALID_PTR;

    while (slash)
    {
        memset(currdir, 0, MAXPATHLEN);
        strncpy(currdir, aPath, slash - aPath);
        
        if (-1 == stat(currdir, &dummy))
            mkdir(currdir, 0755);
        
        pathpos = slash;
        slash = strchr(pathpos+1, '/');
    }   

    return err;
}