source: other-projects/trunk/gsinstaller/gsinstall.cpp@ 15927

#include <vector>
#include <string>

// use the standard namespace
#if !defined (GSDL_NAMESPACE_BROKEN)
#if defined(GSDL_USE_OBJECTSPACE)
using namespace ospace::std;
#else
using namespace std;
#endif
#endif

#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include <commctrl.h>

#include "dirSelector.h"
#include "common.h"
#include "configFile.h"
#include "File.h"
#include "FilePath.h"
#include "FileCopier.h"
#include "launchApp.h"
#include "unInstall.h"

#include "gsRegistry.h"
#include "gsPlatform.h"
#include "gsProgman.h"
#include "gsProfile.h"
#include "gsManifest.h"

char *app_cmdLine;
static char app_name[] = "Greenstone Installer";
HINSTANCE app_instance;
HWND app_window;

bool config_complete = false;

dirSelector *rootSelector = NULL;

typedef vector<dirSelector *> dirSelVector;

class GSInstall : public installManager
{
private:
  configureFile *configFile; // the installation configure file

  FilePath *collectPath; // where the collection is currently installed
  FilePath *installToPath; // the first cut at a destination folder
  FilePath *sourcePath; // the root source folder
  FilePath *gsdlSourcePath; // the gsdl folder in the source area
  FilePath *destinationPath; // where the executables will be installed to
  FilePath *dataDestPath; // where the collection data files will go

  bool installVolume; // whether to install collection data
  bool installFullVolume; // whether to install all collection data

  dirSelVector selectedDirs; // configuration objects

  gsPlatform platform; // platform information
  gsRegistry *gsRegister; // registry
  gsManifest *manifest; // manifest of files
  gsProgramManager *progman; // program manager connection

  string setupExe; // form to use for gs(s)setup.exe

  void getSourcePath();
  void getExistingInstall();
public:
  bool installExe;
  bool offerNetscape;

  GSInstall(bool uninstall);
  FilePath *collectionPath();
  FilePath *installPath();
  FilePath *installSourcePath() { return this->sourcePath; }
  string setupExeLeaf() { return this->setupExe; }
  bool copyFiles();
  bool updateRegistry();
  bool updateProfiles();
  bool updateProgman();
  bool updateSetupExe();
  bool installNetscape();
  bool removeFailed(string file) { return this->manifest->undoFailed(file); }
  void setDestination();
  bool setUninstall();
  void uninstall();
  void setManifest();
  void addSelectedDir(dirSelector *selector);
};

static string gsdl_DBHOME = "gdbmhome";
static string gsdl_VLHOME = "gsdlhome";
static string gsdl_STATIC = "staticpath";
static string gsdl_COLLIST= "collections";

void gsInstall_getDesktopExt(int *sx, int *sy)
{
  HDC dc = GetDC(GetDesktopWindow());
  *sx = GetDeviceCaps(dc, HORZRES);
  *sy = GetDeviceCaps(dc, VERTRES);
  ReleaseDC(GetDesktopWindow(), dc);
}

/**
 * Get various and nefarious details before we start trying an installation.
 * The installation configuration file is read, we seek for an existing
 * installation and reconfigure the default install settings appropriately.
 * THe source path is also discovered.
 */
GSInstall::GSInstall(bool uninstall)
  : installManager()
{
  // get the installation configuration file
  this->configFile = new configureFile("install.cfg");

  // set up "default" installation bits
  this->installToPath = new FilePath("C:\\GSDL");
  this->collectPath = NULL;
  this->installExe = true; // we must install the exe files
  this->offerNetscape = (this->configFile->getString("OfferNetscape") == "1");

  // don't attempt this with windows 3.1
  if (!this->platform.isWindows32s())
    {
      // get the registry
      this->gsRegister  = new gsRegistry(*this, *this->configFile);
      this->setupExe    = "gssetup.exe";
    }
  else
    {
      // TODO: in windows 3.1 we can't use the register as it isn't fully/properly
      //       implemented; we must get the existing path information from elsewhere
      this->gsRegister = new gsRegistry(*this, *this->configFile);
      this->setupExe   = "gsetup.exe";
    }

  // assume for now we will install the full volume and the database
  this->installVolume = true;
  this->installFullVolume = true;

  // detect any existing installation; unnecessary in uninstall (it's the
  // "source" directory - see later
  if (uninstall == false)
    {
      this->getExistingInstall();
    }

  // get where we are installing from
  this->getSourcePath();

  // if doing an uninstall we now know where the "uninstall" is
  if (uninstall == true)
    {
      this->collectPath = this->sourcePath;
    }

  // get the manifest and program manager objects
  if (uninstall)
    {
      this->manifest = new gsManifest(*this);
    }
  else
    {
      this->manifest = new gsManifest(*this, *this->sourcePath);
    }
  this->progman  = new gsProgramManager(*this);

  // tell manifest the number of bits in the raw windows environment; this may
  // be required for loading certain modules such as winsock; the number of
  // macros is over-the-top, but is more robust to unforeseen future requirements
  /*  if (platform.isWindows32s())
      { this->manifest->expandMacro("WINBITS", "16");
      this->manifest->expandMacro("WIN16", "16");
      this->manifest->expandMacro("WIN32", "32");
      }
      else
      { this->manifest->expandMacro("WINBITS", "32");
      this->manifest->expandMacro("WIN16", "");
      this->manifest->expandMacro("WIN32", "32");
      }
  */
  // inform manifest of collection directory name
  string colDir;
  colDir = this->configFile->getString("CollectionDirName");
  if (colDir != "")
    { 
      this->manifest->expandMacro("COLDIRNAME", colDir);
    }
}

/**
 * Detect the presence of an existing installation
 */
void GSInstall::getExistingInstall()
{
  if (!this->platform.isWindows32s())
    {
      if (gsRegister->collectionInstalled())
    {
      // TODO: check if receptionist etc should be replaced or not

      // TODO: check build version of the volume

      // Get location of the library executable from the registry; this
      // is thence used to get the location of gsdlsite.cfg etc.
      this->collectPath = this->gsRegister->collectionPath();
      if (this->collectPath->pathString() != "")
        {
          this->installToPath = this->collectPath;
          // we don't need to install the exe files
          this->installExe = false;
        }
    }
    }
}

/**
 * get the source path for this install; we derive this from the path of this
 * executable (the installer)
 */
void GSInstall::getSourcePath()
{
  static char filename[512];
  FilePath *exePath;

  // get the filepath of this executable
  GetModuleFileName(0, filename, 512);
  exePath = new FilePath(filename);

  // get the parent (i.e. the folder containing this executable) for the source
  // folder
  this->sourcePath = exePath->parent();

  // get the gsdl source path
  this->gsdlSourcePath = new FilePath(this->sourcePath->pathString(), "gsdl");
  delete exePath;
}

/**
 * Controls the actual copying of the files; manifests of what to install
 * are read in from a configuration on the hard drive - this should be basically
 * greenstone dependent, and void of any collection-specific rubbish!
 */
bool GSInstall::copyFiles()
{
  // ensure that we have got the required destination and that we can write there
  if (this->installExe)
    {
//      this->destinationPath->ensureWriteablePath();
    }

  // ensure that the destination path for the collection itself is available
  if (this->installVolume)
    {
//      this->dataDestPath->ensureWriteablePath();
    }

  // do the copy
  return this->manifest->copy(this->gsdlSourcePath);
}

/**
 * Fulfill registry update requirements; first the keys are set up, then they
 * are filled with key item/value pairs.
 */
bool GSInstall::updateRegistry()
{
  // don't do registry stuff under windows 32s
  // TODO: actually reinstate what is required
  if (this->platform.isWindows32s())
    {
      return true;
    }

  // ensure all pertinent keys already exist for this volume/collection
  this->gsRegister->ensureKeysExist();

  // now move on to add key items
  if (this->installExe)
    {
      //      FilePath *serverPath = new FilePath(this->destinationPath->pathString(), "server.exe");
      FilePath *serverPath = new FilePath(this->destinationPath->pathString(), "server.exe");
      FilePath *setupPath = new FilePath(this->destinationPath->pathString(), this->setupExe);
      FilePath *logPath = new FilePath(this->destinationPath->pathString(), "install.log");
      string exeKeyPath, uninstallCmd, uninstallKeyPath;
      gsPlatform platform;

      // store the normal collection key information
      this->gsRegister->storeKeyString(HKEY_LOCAL_MACHINE,
                       this->gsRegister->collectKeyId(),
                       "library",
                       serverPath->pathString());

      // This test is in fact for 9x or NT 4+; we're worried about the registry
      // format, not about the shell as such
      if (platform.isExplorerShell())
    {
      // get special app path key for windows 9x
      exeKeyPath = this->gsRegister->exeKeyId("server.exe");

      // ensure that the exe key exists
      this->gsRegister->ensureKeyExists(HKEY_LOCAL_MACHINE, exeKeyPath);

      // store default key for this application
      this->gsRegister->storeKeyString(HKEY_LOCAL_MACHINE,
                       exeKeyPath,
                       "",
                       serverPath->pathString());

      // store path for this application
      this->gsRegister->storeKeyString(HKEY_LOCAL_MACHINE,
                       exeKeyPath,
                       "path",
                       this->destinationPath->pathString());

      // create uninstall command line
      uninstallCmd = setupPath->pathString() + " -u " + logPath->pathString();
      uninstallKeyPath = this->gsRegister->uninstallKeyId(this->configFile->getString("CollectionName"));

      // ensure uninstall key exists
      this->gsRegister->ensureKeyExists(HKEY_LOCAL_MACHINE, uninstallKeyPath);
      
      this->gsRegister->storeKeyString(HKEY_LOCAL_MACHINE, uninstallKeyPath,
                       "DisplayName",
                       this->configFile->getString("CollectionName"));
      this->gsRegister->storeKeyString(HKEY_LOCAL_MACHINE, uninstallKeyPath,
                       "UninstallString", uninstallCmd);
    }
      delete setupPath;
      delete serverPath;
      delete logPath;
    }

  if (this->installVolume || this->installFullVolume)
    {   
      // no actual key items are held in the volume key; for future use
    }
  return true;
}

/**
 * Set the destination directory details
 */
void GSInstall::setDestination()
{
  // get configuration from the install wizard pages
  this->destinationPath = new FilePath(this->selectedDirs[0]->selectedPath());
  this->installFullVolume = this->selectedDirs[1]->getOption();
  if (this->installFullVolume || true)  // NB: always take path from 2nd dialog
    {
      this->dataDestPath = new FilePath(this->selectedDirs[1]->selectedPath());
    }
  else
    {
      this->dataDestPath = this->destinationPath;
    }


  // set the log for writing

  FilePath *logPath = new FilePath(this->destinationPath->pathString(), "install.log");

  this->setLogFile(logPath->pathString());

  this->readLog();

  delete logPath;

}

bool GSInstall::setUninstall()
{
  char tempPathStr[MAX_PATH];

  // if we failed to get the Windows temporary directory, abort
  if (GetTempPath(MAX_PATH, tempPathStr) == 0)
    {
      // TODO: abort!
      return false;
    }

  FilePath tempPath(tempPathStr);

  // if we are not running in the Windows temporary directory, copy this exe
  // and the installation log to the temporary directory and run them there
  if (*this->sourcePath != tempPath)
    {
      // copy this and install.log to temporary directory and restart
      FilePath exePath(*this->sourcePath, this->setupExe);
      FilePath logPath(*this->sourcePath, "install.log");

      FilePath exeDest(tempPath, this->setupExe);
      FilePath logDest(tempPath, "install.log");

      CopyFile(exePath.cString(), exeDest.cString(), false);
      CopyFile(logPath.cString(), logDest.cString(), false);

      // now run the gssetup in the temporary directory
      launchApp launchUninstall(exeDest);
      launchUninstall.setCommandLine(" -u " + logPath.pathString());
      launchUninstall.run(false, 0, "", "", false);

      return false;
    }

  // open the log for reading from the directory this exe is now in (which
  // will in fact be the temporary directory as outlined above)
  FilePath *logPath = new FilePath(this->sourcePath->pathString(), "install.log");

  this->setLogFile(logPath->pathString());
  this->readLog();
  delete logPath;

  return true;
}

void GSInstall::uninstall()
{
  FilePath *iniPath;
  string command;
  stringArray params;

  this->manifest = new gsManifest(*this); // get a manifest manager

  iniPath = new FilePath(this->installRoot(), "gsdlsite.cfg");
  gsProfile gsdlProfile(*this, iniPath->pathString());

  while ((command = this->popCommand(params)) != "")
    {
      if (!this->manifest->undoAction(command, params))
    {
      if (!gsdlProfile.undoAction(command, params))
        {
          if (!this->gsRegister->undoAction(command, params))
        {
          if (!this->progman->undoAction(command, params))
            {
            }
        else
        {

        }
        }
        }
    }
    }

}

/**
 *  Collate the manifest for installation
 */
void GSInstall::setManifest()
{
  if (this->installExe)
    {
      this->manifest->selectGroup("library", *this->destinationPath);
    }
  if (this->installFullVolume)
    {
      this->manifest->selectGroup("supporting", *this->dataDestPath);
      this->manifest->selectGroup("collection", *this->dataDestPath);
    }
  else
    {
      this->manifest->selectGroup("database", *this->dataDestPath);
    }
}

/**
 * Update the program manager/explorer shell with icons, groups etc for this
 * collection/application
 */
bool GSInstall::updateProgman()
{
  string groupName;
  string collectionName;

  // if we managed to get a connection to the program manager (or explorer
  // shell) then do the requisite updates
  if (this->progman->connect())
    {
      // get group name from folders
      groupName = this->configFile->getString("ProgramGroupName");
      if (groupName == "")
    {
      // TODO: error handling
      this->progman->disconnect();
      return false;
    }
      collectionName = this->configFile->getString("CollectionName");
      if (collectionName == "")
    {
      // TODO: error handling
      this->progman->disconnect();
      return false;
    }

      // add the group
      if (!this->progman->addProgramGroup(groupName))
    {
      this->progman->disconnect();
      return false;
    }

      // add a "server" icon
      FilePath libraryPath(this->destinationPath->pathString(), "server.exe");
      if (!this->progman->addIcon(groupName, collectionName, libraryPath.pathString(), "", ""))
    {
    }

      FilePath readMePath(this->destinationPath->pathString(), "readme.txt");
      if (!this->progman->addIcon(groupName, "ReadMe", readMePath.pathString(), "", ""))
    {
    }

      FilePath supportPath(this->destinationPath->pathString(), "Support.htm");
      if (!this->progman->addIcon(groupName, "Technical Support", supportPath.pathString(), "", ""))
    {
    }


      FilePath uninstallPath(this->destinationPath->pathString(), this->setupExe);
    FilePath logPath(this->destinationPath->pathString(), "install.log");
    if (this->platform.isWindows32s() == false) // NB: don't add this shortcut under
                                              // Windows32s as it causes a crash
                                              //
                                              // TODO: reinstate this with Win3.1
                                              // happy code
  {
      if (!this->progman->addIcon(groupName, "Uninstall", uninstallPath.pathString(), " -u " + logPath.pathString(),
                  "Remove this Greenstone collection"))
      {
      }
    }
    else
    {   if (!this->progman->addIcon(groupName, "Uninstall", uninstallPath.pathString() + " -u " + logPath.pathString(), "",
                  "Remove this Greenstone collection"))
      {
      }
    }
      // disconnect from program manager
      this->progman->disconnect();
    }
  return true;
}

/**
 * Update the profile (ini) files associated with the program; these changes
 * must be made after copying to files in the destination/executable folders
 * as we can't write to CD-ROM (or at least we shouldn't - the install would
 * become tainted).
 */
bool GSInstall::updateProfiles()
{
  FilePath *exePath;
  FilePath *dataPath;
  FilePath *iniPath;

  // if we're installing the exe, then the exe path leads to the destination
  // folder of this installation sequence;  if not, then we pick it up from
  // the existing location of that folder
  if (this->installExe)
    {
      exePath = this->destinationPath;
    }
  else
    {
      exePath = this->collectPath;
    }
  iniPath = new FilePath(exePath->pathString(), "gsdlsite.cfg");

  // TODO: check if this 'if' structure is correct; suspect that it isn't quite
  //       as we may not be installing the volume, but exe etc individually;
  //       may be okay now but not future proof; also the destination directory
  //       may or may not be tied to the exe directory if that existed already.
  //       This all needs investigating
  if (this->installVolume)
    {
      // Manufacture the appropriate section name now; an equivalent string
      // is also constructed
      string volumeSectionString = this->configFile->getString("CollectionName") +
    "#" + this->configFile->getString("CollectionVolume");

      // if we're installing the full data for the collection, then take the
      // data path to be at the selected destination directory for the collection
      // files; otherwise take the data path to be on the CD/distribution media
      if (this->installFullVolume)
    {
      dataPath = this->dataDestPath;
    }
      else
    {
      dataPath = this->gsdlSourcePath;
    }

      // create a profile object to write to the gsdlsite.cfg file
      gsProfile gsdlProfile(*this, iniPath->pathString());

      // if installing the executable, add the database and greenstone home
      // directories
      if (this->installExe)
    {
      // set the correct exe entries in gsdlsite.cfg (in the gsdl section)
      gsdlProfile.writeString("gsdl", "gsdlhome", dataPath->pathString());
      gsdlProfile.writeString("gsdl", "gdbmhome", this->dataDestPath->pathString());
    }

      // set the correct collection volume entries in gsdlsite.cfg
      if (this->installVolume)
    {
      // note the collection in the general gsdl section; and add the undo item too
      gsdlProfile.ensureListMember("gsdl", gsdl_COLLIST, volumeSectionString);

      // note the volume data in its own section
      gsdlProfile.writeString(volumeSectionString, "gsdlhome", dataPath->pathString());
      gsdlProfile.writeString(volumeSectionString, "gdbmhome", this->dataDestPath->pathString());
      gsdlProfile.writeString(volumeSectionString, "staticpath", dataPath->pathString());
    }
    }
  
  // clean up
  delete iniPath;
  
  return true;
}

/**
 * Ensure that we've installed the very latest setup executable @ the destination/
 * greenstone folder
 */
bool GSInstall::updateSetupExe()
{
  FilePath *destExePath;
  FilePath srcExeFile(*this->sourcePath, "gssetup.exe");

  if (this->installExe)
    {
      destExePath = this->destinationPath;
    }
  else
    {
      destExePath = this->collectPath;
    }
    FilePath destExeFile(*destExePath, this->setupExe);

  if (this->platform.isWindows32s() == false) // NB: Don't copy the setup executable
                                                                                        // to Windows32s as it causes a hang!
  { if (!CopyFile(srcExeFile.cString(), destExeFile.cString(), false))
        {
        return false;
        }
  }
  else
  { // Windows 3.1 has a peculiar behaviour on calling CopyFile on an .exe;
    // it doesn't. (Copy the file); thus we copy to an non-exe file and then
    // rename it into an exe file; this works.
    FilePath intExeFile(*destExePath, "gsetup.ex");
    if (!CopyFile(srcExeFile.cString(), intExeFile.cString(), false))
        {
        return false;
        }
    MoveFile(intExeFile.cString(), destExeFile.cString());
  }
  return true;
}

bool GSInstall::installNetscape()
{
  FilePath netscape32Path(this->sourcePath->pathString(), "netscape\\n32e405.exe");
  FilePath netscape16Path(this->sourcePath->pathString(), "netscape\\n16e405.exe");

  launchApp launchNetscape(netscape32Path);
  launchNetscape.platformApp(gsPlatform_WINDOWS32S, netscape16Path);
  launchNetscape.platformApp(gsPlatform_WINDOWS, netscape16Path);
  if (launchNetscape.run(true, 1,
             "This library is displayed using a web browser.  If you don't "
             "currently have a web browser installed on your machine you may "
             "install the Netscape 4.05 browser now.\n\n"
             "Note that if your current browser was provided by your internet "
             "service provider, you should install Netscape in a different "
             "directory.\n\n"
             "Would you like to install the Netscape 4.05 browser now?",
             "Greenstone Installer", false) < 0)
    {
      //      MessageBox(0, "Error", app_name, MB_OK);
      return false;
    }
  return true;
}

FilePath *GSInstall::collectionPath()
{
  return this->collectPath;
}

FilePath *GSInstall::installPath()
{
  return this->installToPath;
}

void GSInstall::addSelectedDir(dirSelector *selector)
{
  this->selectedDirs.push_back(selector);
}

typedef struct
{
  dirSelector * dirSelect;
} GSInstall_dirPathData;

HGLOBAL loadDirBrowser()
{ 
  HRSRC resHdl;

  resHdl = FindResource(app_instance, "MySaveAsDlg", RT_DIALOG);
  return LoadResource(app_instance, resHdl);
}

void gsInstall_wizard_centre(HWND dialog)
{
  RECT rect;
  int sx, sy;
  int dx, dy;
  
  gsInstall_getDesktopExt(&sx, &sy);
  GetWindowRect(dialog, &rect);

  dx = (sx - rect.right + rect.left) >> 1;
  dy = (sy - rect.bottom + rect.top) >> 1;
  SetWindowPos(dialog, 0, dx, dy, 0, 0, SWP_NOZORDER | SWP_NOSIZE);
}

BOOL FAR PASCAL GSInstall_dlgproc(HWND Dialog, UINT Message, WPARAM wParam, LPARAM lParam)
{ 
  static bool first = true;   // static variable to hack the position of the
                              // whole wizard; note doing this in the wizard
                              // property sheet initialisation DOES NOT WORK

  switch (Message)
    {
    case WM_INITDIALOG:
      {
    dirSelector *selector = (dirSelector *) ((PROPSHEETPAGE *) lParam)->lParam;

        SetDlgItemText(Dialog, dirpath_PROMPT, selector->prompt);
    if (selector->optPrompt != NULL)
      {
        SetDlgItemText(Dialog, dirpath_OPTION, selector->optPrompt);
        EnableWindow(GetDlgItem(Dialog, dirpath_BROWSE), true); // was false
        EnableWindow(GetDlgItem(Dialog, dirpath_PATH), true); // was false
      }
    else
      {
        ShowWindow(GetDlgItem(Dialog, dirpath_OPTION), SW_HIDE);
      }
    SetWindowLong(Dialog, GWL_USERDATA, ((PROPSHEETPAGE *) lParam)->lParam);
    SetDlgItemText(Dialog, dirpath_PATH, selector->selectedPath());
    
    // if this is the first time this function is called, then centre the
    // wizard into the centre of our screen.
    if (first)
      {
        gsInstall_wizard_centre(GetParent(Dialog));
        first = false;
      }
      }
      return TRUE;

    case WM_COMMAND:
      switch (LOWORD(wParam))
    {
    case dirpath_BROWSE:
      ((dirSelector *) GetWindowLong(Dialog, GWL_USERDATA))->requestPath(Dialog, "Select Directory");
          SetDlgItemText(Dialog, dirpath_PATH, ((dirSelector *) GetWindowLong(Dialog, GWL_USERDATA))->selectedPath());
      break;

        case dirpath_OPTION:
      ((dirSelector *) GetWindowLong(Dialog, GWL_USERDATA))->setOption(IsDlgButtonChecked(Dialog, dirpath_OPTION) == BST_CHECKED);
      if (HIWORD(wParam) == BN_CLICKED && false)
        // don't do the enable/disable these days
        {
          EnableWindow(GetDlgItem(Dialog, dirpath_BROWSE), IsDlgButtonChecked(Dialog, dirpath_OPTION));
          EnableWindow(GetDlgItem(Dialog, dirpath_PATH), IsDlgButtonChecked(Dialog, dirpath_OPTION));
        }
      break;
    }
      break;

    case WM_NOTIFY:
      switch (((LPNMHDR) lParam)->code)
    {
    case PSN_SETACTIVE:
      {
        dirSelector *selector = ((dirSelector *) GetWindowLong(Dialog, GWL_USERDATA));

        // bodge to set the dialogue path to the correct value
        if (selector != rootSelector)
          {
        selector->setPath(rootSelector->selectedPath());
        SetDlgItemText(Dialog, dirpath_PATH, selector->selectedPath());
          }


        PropSheet_SetWizButtons(GetParent(Dialog), (selector->isFirst() ? 0 : PSWIZB_BACK) |
                                                 (selector->isFinal() ? PSWIZB_FINISH : PSWIZB_NEXT));
      }
      break;
      
        case PSN_KILLACTIVE:
      break;

    case PSN_WIZNEXT:
      {
        // note the path from the dialog
        dirSelector *selector = ((dirSelector *) GetWindowLong(Dialog, GWL_USERDATA));
        selector->setPathFromEdit(GetDlgItem(Dialog, dirpath_PATH));

        // create a new FilePath object to check on the proposed destination
        FilePath *path = new FilePath(selector->selectedPath());

        // if the proposed destination doesn't exist, ask the user whether to
        // create it now.  TODO: actually create it if asked!
        if (path->exists() == false)
          {
        char buffer[128];

            sprintf(buffer, "Directory %s does not exist - create it?", selector->selectedPath());

        // if the user cancelled that, then don't permit them to go to the next
        // page of the wizard
            if (MessageBox(0, buffer, app_name, MB_YESNO | MB_TOPMOST) == IDNO)
          {
            delete path;
            SetWindowLong(Dialog, DWL_MSGRESULT, TRUE);
            return TRUE;
          }
          }
        delete path;
      }
      break;
      
        case PSN_WIZFINISH:
      {
        // Finish the activity now
        config_complete = true;
          }
      break;
    }
      break;
    }
  return FALSE;
}

void GSInstall_init_propertySheet(PROPSHEETPAGE &ppage, char *prompt, char *optPrompt,
                  char *title, GSInstall &installer, bool isFirst, bool isFinal)
{
  GSInstall_dirPathData *data = new GSInstall_dirPathData;

  // create the directory Selector
  data->dirSelect = new dirSelector(prompt, optPrompt, title, installer.installPath());
  data->dirSelect->setFirst(isFirst);
  data->dirSelect->setFinal(isFinal);

  // if there is no extant root selector, make this it
  if (rootSelector == NULL)
    {
      rootSelector = data->dirSelect;
    }

  // add this directory selector to the installer
  installer.addSelectedDir(data->dirSelect);

  // set up the rest of the page
  ppage.dwSize = sizeof(PROPSHEETPAGE);
  ppage.dwFlags = PSP_USETITLE;
  ppage.hInstance = app_instance;
  ppage.pszTemplate = "getDirPath";
  ppage.pszIcon = 0;
  ppage.pszTitle = app_name;
  ppage.pfnDlgProc = (DLGPROC) GSInstall_dlgproc;
  ppage.lParam = (LPARAM) data->dirSelect;
  ppage.pfnCallback = NULL;
}

int CALLBACK GSInstall_wizardProc(HWND dialog, UINT Message, LPARAM lParameter)
{
  switch (Message)
    {
    case PSCB_INITIALIZED :
      // Process PSCB_INITIALIZED
      gsInstall_wizard_centre(dialog);
      break ;

    case PSCB_PRECREATE :
      // Process PSCB_PRECREATE
      break ;

    default :
      // Unknown message
      break ;
    }
  return 0;
}

bool GSInstall_init_wizard(GSInstall &install)
{
  PROPSHEETHEADER pshead;
  PROPSHEETPAGE ppage[2];
  bool reply;

  ZeroMemory(&pshead, sizeof(PROPSHEETHEADER));
  pshead.dwSize = sizeof(PROPSHEETHEADER);
  pshead.dwFlags = PSH_PROPSHEETPAGE | PSH_USECALLBACK | PSH_USEHICON | PSH_WIZARD;
  pshead.hwndParent = app_window;
  pshead.hInstance = app_instance;
  pshead.hIcon = NULL;
  pshead.pszCaption = "Greenstone Installer";
  pshead.nPages = 2;
  pshead.nStartPage = 0;
  if (install.installExe == true)
    {
      pshead.ppsp = ppage;
    }
  else // cheat as the executable etc. is already installed
    {
      pshead.ppsp = &ppage[1];
    }
  pshead.pfnCallback = GSInstall_wizardProc;

  GSInstall_init_propertySheet( ppage[0],
                "Choose a directory to install your "
                                "Greenstone software to.", NULL,
                                "Select", install, true, false);
  GSInstall_init_propertySheet(ppage[1],
                   "Choose a directory to install the collection "
                   "files to.\n\n"
                   "You can also choose to install all the collection "
                   "files onto your computer hard drive.\n\n"
                   "If you do this, you will not have to load the "
                   "CD-ROM each time you use your Greenstone software "
                   "but more of your hard disk will be used.\n\n"
                   "Some collection files must be installed on your "
                   "computer.\n\n",
                   "Install all collection files",
                   "Select", install, false, true);

  reply = (PropertySheet (&pshead) >= 0);
  return reply;
}

long FAR PASCAL GSInstallWindProc(HWND Window, WORD Message, WPARAM wParameter, LPARAM lParameter)
{
  long reply = 0;

  switch(Message)
    {
    case WM_CREATE:
      {
    ShowWindow(Window, SW_MAXIMIZE);
      }
      break;

    case WM_COMMAND:
      break;

    case WM_USER:
      {
    if (strstr(app_cmdLine, "-u") != NULL)
      {
    // uninstall action

        // skip past the -u option itself
        char *at = strstr(app_cmdLine, "-u");
        at += strlen("-u");

        // extract the log file path from the command line
        while (*at == ' ')
          {
        at ++;
          }
        string logPathString(at);
        FilePath logPath(logPathString);

        GSInstall install(true);
        // if we're running in the temporary directory, do the uninstall
        if (install.setUninstall())
          {
          install.uninstall();

          // close the log to write back all changes to the log; if the file
          // will be deleted, it must be closed; copying may also fail, so it's
          // safer to close it before doing either.
          install.recordLog();

          // if the install is empty, terminate all final items (currently the
          // log and setup executables,
          if (install.isEmpty())
        {
          // delete the log file
          DeleteFile(logPath.cString());

          // get it's parent to find where the gssetup executable will be
          FilePath *logParent = logPath.parent();
          FilePath uninstallPath(*logParent, install.setupExeLeaf());

          // delete the gssetup executable
          DeleteFile(uninstallPath.cString());

            // kill the original log parent directory if it should have died
          if (install.removeFailed(logParent->pathString()))
            {
                RemoveDirectory(logParent->cString());
            }

          // dispose of the parent directory information
          delete logParent;
        }

          // if not, then overwrite the original log with the modified one
          else
        {
          // do nothing - should be changed already!
        }
          }
      }
    // install wizard
    else
      {
        GSInstall install(false);
        GSInstall_init_wizard(install);
        if (config_complete == false)
          {
        MessageBox(0, "Install cancelled", app_name, MB_OK);
          }
        else
          {
        // configure the installation
        install.setDestination();
        install.setManifest();

        if (!install.copyFiles())       // caused page fault; Windows 3.1
      { MessageBox(0, "Not enough space to install required files", "Greenstone Installer", MB_OK);
        install.abortLog();
         DestroyWindow(Window);
         return false;
      }
        install.updateProgman();   // caused divide overflow; Windows 3.1
        install.updateRegistry();
        install.updateProfiles();
        install.updateSetupExe();  // caused bomb-out of Windows; 3.1

        // close log
        install.recordLog();

        // do further actions
        if (install.offerNetscape == true) {
          install.installNetscape();
        }

        MessageBox(0, "Installation complete.", "Greenstone Installer", MB_OK);
          }
    }
    DestroyWindow(Window);
      }
      break;
      
    case WM_USER + 1:
    break;

    case WM_CLOSE:
      /*if (!file_ischanged || IDCANCEL != file_query(Window, file_name))*/
      DestroyWindow(Window);
      return 0L;

    case WM_DESTROY:
      {
    PostQuitMessage(0);
      }
      break;
      
    default:
      return(DefWindowProc(Window, Message, wParameter, lParameter));
    }
  return reply;
}

void GSInstall_init(HINSTANCE instance, int Show)
{
  int sx, sy;

  gsInstall_getDesktopExt(&sx, &sy);
  
  app_window = CreateWindow("GSInstall:Main", "Greenstone Installer",
                WS_OVERLAPPEDWINDOW | WS_MAXIMIZE | CS_DBLCLKS,
                0, 0,
                sx, sy,
                NULL,
                NULL,
                app_instance,
                NULL);

  ShowWindow(app_window, Show);

  PostMessage(app_window, WM_USER, 0, 0L);
}

void WinClassInit(void)
{
  WNDCLASS Class;

  Class.lpszClassName = "GSInstall:Main";
  Class.hInstance = app_instance;
  Class.lpfnWndProc = (WNDPROC) GSInstallWindProc;
  Class.hCursor = LoadCursor(NULL, IDC_ARROW);
  Class.hIcon = NULL; //LoadIcon(app_instance, "GSInstall");
  Class.lpszMenuName = NULL;
  Class.hbrBackground = (HBRUSH) (COLOR_APPWORKSPACE+1);
  Class.style = 0;
  Class.cbClsExtra = 0;
  Class.cbWndExtra = 0;
  RegisterClass(&Class);
}

int PASCAL WinMain(HINSTANCE Current,
           HINSTANCE Previous,
           LPSTR CmdLine,
           int CmdShow)
{
  MSG msg;

    gsPlatform p;

  if (p.isWindows32s())
  {
    char filename[512];
      FilePath *exePath;
    FilePath *dirPath;

        // get the filepath of this executable
        GetModuleFileName(0, filename, 512);
        exePath = new FilePath(filename);

        // get the parent (i.e. the folder containing this executable) for the source
        // folder
        dirPath = exePath->parent();
    delete exePath;

    exePath = new FilePath(dirPath->cString(), "install.log");

    if (exePath->exists())
    { app_cmdLine = (char *) malloc(256);
      lstrcpy(app_cmdLine, "gsetup.exe -u ");
      lstrcat(app_cmdLine, exePath->cString());
        }
    else
    {   app_cmdLine = (char *) malloc(1);
        app_cmdLine[0] = '\0';
        }

    delete exePath;
    delete dirPath;
  }
  else
  { app_cmdLine = (char *) malloc(lstrlen(CmdLine) + 1);
    lstrcpy(app_cmdLine, CmdLine);
    }

  app_instance = Current;
  /* -- init application */
  if (!Previous)
    {
      WinClassInit();
      InitCommonControls();
    }

  /* -- init instance */
  GSInstall_init(Current, CmdShow);

  while (GetMessage(&msg, NULL, 0, 0))
    {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
  return (int) msg.wParam;
}