!include FileFunc.nsh
!include UAC.nsh

!define FOLDERID_UserProgramFiles {5CD7AEE2-2219-4A67-B85D-6C9CE15660CB}
!define KF_FLAG_CREATE 0x00008000

!define INSTALL_REGISTRY_KEY "Software\${APP_GUID}"
!define UNINSTALL_REGISTRY_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_GUID}"
!define UNINSTALL_DISPLAY_NAME "${PRODUCT_NAME} ${VERSION}"

# current Install Mode ("all" or "CurrentUser")
Var installMode

!ifndef INSTALL_MODE_PER_ALL_USERS
  !ifndef ONE_CLICK
    Var hasPerUserInstallation
    Var hasPerMachineInstallation
  !endif
  Var PerUserInstallationFolder

  !macro setInstallModePerUser
    StrCpy $installMode CurrentUser
    SetShellVarContext current

    # сhecks registry for previous installation path
    ReadRegStr $perUserInstallationFolder HKCU "${INSTALL_REGISTRY_KEY}" InstallLocation
    ${if} $perUserInstallationFolder != ""
      StrCpy $INSTDIR $perUserInstallationFolder
    ${else}
      StrCpy $0 "$LocalAppData\Programs"
      # Win7 has a per-user programfiles known folder and this can be a non-default location
      System::Call 'Shell32::SHGetKnownFolderPath(g "${FOLDERID_UserProgramFiles}",i ${KF_FLAG_CREATE},i0,*i.r2)i.r1'
      ${If} $1 == 0
        System::Call '*$2(&w${NSIS_MAX_STRLEN} .r1)'
        StrCpy $0 $1
        System::Call 'Ole32::CoTaskMemFree(ir2)'
      ${endif}
      StrCpy $INSTDIR "$0\${APP_FILENAME}"
    ${endif}
  !macroend
!endif

!ifdef INSTALL_MODE_PER_ALL_USERS_REQUIRED
  Var perMachineInstallationFolder

  !macro setInstallModePerAllUsers
    StrCpy $installMode all
    SetShellVarContext all

    !ifdef BUILD_UNINSTALLER
      ${IfNot} ${UAC_IsAdmin}
        ShowWindow $HWNDPARENT ${SW_HIDE}
        !insertmacro UAC_RunElevated
        Quit
      ${endif}
    !endif

    # сheck registry for previous installation path
    ReadRegStr $perMachineInstallationFolder HKLM "${INSTALL_REGISTRY_KEY}" InstallLocation
    ${if} $perMachineInstallationFolder != ""
      StrCpy $INSTDIR $perMachineInstallationFolder
    ${else}
      StrCpy $0 "$PROGRAMFILES"
      !ifdef APP_64
        ${if} ${RunningX64}
          StrCpy $0 "$PROGRAMFILES64"
        ${endif}
      !endif

      !ifdef MENU_FILENAME
        StrCpy $0 "$0\${MENU_FILENAME}"
      !endif

      StrCpy $INSTDIR "$0\${APP_FILENAME}"
    ${endif}
  !macroend
!endif