@ECHO OFF
TITLE ghacks user.js updater

REM ### ghacks-user.js updater for Windows
REM ## author: @claustromaniac
REM ## version: 3.0

SET _myname=%~n0
SET _myparams=%*
SETLOCAL EnableDelayedExpansion
:parse
IF "%~1"=="" (
	GOTO endparse
)
IF /I "%~1"=="-unattended" (
	SET _ua=1
)
IF /I "%~1"=="-log" (
	SET _log=1
)
IF /I "%~1"=="-logp" (
	SET _log=1
	SET _logp=1
)
IF /I "%~1"=="-multioverrides" (
	SET _multi=1
)
IF /I "%~1"=="-merge" (
	SET _merge=1
)
SHIFT
GOTO parse
:endparse
ECHO.
SET /A "_line=0"
IF NOT EXIST user.js (
	ECHO user.js not detected in the current directory.
) ELSE (
	FOR /F "skip=1 tokens=1,2 delims=:" %%G IN (user.js) DO (
		SET /A "_line+=1"
		IF !_line! GEQ 4 (
			GOTO exitloop
		)
		IF !_line! EQU 1 (
			SET _name=%%H
		)
		IF !_line! EQU 2 (
			SET _date=%%H
		)
		IF !_line! EQU 3 (
			SET _version=%%G
		)
	)
	:exitloop
	IF !_line! GEQ 4 (
		IF /I NOT "!_name!"=="!_name:ghacks=X!" (
			ECHO ghacks user.js !_version:~2!,!_date!
		) ELSE (
			ECHO Current user.js version not recognised.
		)
	) ELSE (
		ECHO Current user.js version not recognised.
	)
)
ECHO.
IF NOT DEFINED _ua (
	ECHO.
	ECHO This batch should be run from your Firefox profile directory. It will download the latest version of ghacks user.js from github and then append any of your own changes from user-overrides.js to it.
	ECHO.
	REM ECHO Visit the wiki for more detailed information.
	REM ECHO.
	CHOICE /M "Continue"
	IF ERRORLEVEL 2 EXIT /B
)
CLS
ECHO.
IF DEFINED _log (
	CALL :log >>user.js-update-log.txt 2>&1
	IF DEFINED _logp (
		START user.js-update-log.txt
	)
	EXIT /B
	:log
	ECHO ##################################################################
	ECHO.
	ECHO %date%, %time%
	ECHO.
)
IF EXIST user.js (
	IF EXIST user.js.bak REN user.js.bak user.js.old.bak
	REN user.js user.js.bak
	ECHO Current user.js file backed up.
	ECHO.
)
ECHO Retrieving latest user.js file from github repository...
powershell -Command "(New-Object Net.WebClient).DownloadFile('https://github.com/ghacksuserjs/ghacks-user.js/raw/master/user.js', 'user.js')" >nul
ECHO.
IF EXIST user.js (
	IF DEFINED _multi (
		ECHO Multiple overrides enabled. List of files found:
		FORFILES /P user.js-overrides /M *.js
		IF %ERRORLEVEL% EQU 0 (
			IF DEFINED _merge (
				ECHO.
				ECHO Merging...
				ECHO.
				COPY /B /V /Y user.js-overrides\*.js user-overrides
				CALL :merge user-overrides user-overrides-merged.js
				COPY /B /V /Y user.js+user-overrides-merged.js temp2
				CALL :merge temp2 user.js
			) ELSE (
				ECHO.
				ECHO Appending...
				ECHO.
				COPY /B /V /Y user.js+"user.js-overrides\*.js" user.js
			)
		)
		ECHO.
	) ELSE (
		IF EXIST "user-overrides.js" (
			IF DEFINED _merge (
				ECHO Merging user-overrides.js...
				COPY /B /V /Y user.js+user-overrides.js temp2
				CALL :merge temp2 user.js
			) ELSE (
				ECHO Appending user-overrides.js...
				ECHO.
				COPY /B /V /Y user.js+"user-overrides.js" "user.js"
			)
		) ELSE (
			ECHO user-overrides.js not found.
		)
		ECHO.
	)
	ECHO Handling backups...
	SET "changed="
	IF EXIST user.js.bak (
		FC user.js.bak user.js >nul && SET "changed=false" || SET "changed=true"
	)
	ECHO.
	ECHO.
	IF "!changed!"=="true" (
		IF EXIST user.js.old.bak DEL /F user.js.old.bak
		ECHO Update complete.
	) ELSE (
		IF "!changed!"=="false" (
			DEL /F user.js.bak
			IF EXIST user.js.old.bak REN user.js.old.bak user.js.bak
			ECHO Update completed without changes.
		) ELSE (
			ECHO Update complete.
		)
	)
	ECHO.
) ELSE (
	IF EXIST user.js.bak REN user.js.bak user.js
	IF EXIST user.js.old.bak REN user.js.old.bak user.js.bak
	ECHO.
	ECHO Update failed. Make sure PowerShell is allowed internet access.
	ECHO.
	ECHO No changes were made.
	ECHO.
)
IF NOT DEFINED _log (
	IF NOT DEFINED _ua PAUSE
)
EXIT /B

REM ###### Merge function ######
:merge
DEL /F %2 2>nul
SETLOCAL disabledelayedexpansion
FOR /F "tokens=1,* delims=]" %%G IN ('find /n /v "" ^< "%~1"') DO (
	SET "_pref=%%H"
	SETLOCAL enabledelayedexpansion
	SET "_temp=!_pref: =!"
	IF /I "user_pref"=="!_temp:~0,9!" (
		IF /I NOT "user.js.parrot"=="!_temp:~12,14!" (
			FOR /F "delims=," %%S IN ("!_pref!") DO (
				SET "_pref=%%S"
			)
			SET _pref=!_pref:"=""!
			FIND /I "!_pref!" %~2 >nul 2>&1
			IF ERRORLEVEL 1 (
				FIND /I "!_pref!" %~1 >temp123
				FOR /F "tokens=* delims=" %%X IN (temp123) DO (
					SET "_temp=%%X"
					SET "_temp=!_temp: =!"
					IF /I "user_pref"=="!_temp:~0,9!" (
						SET "_pref=%%X"
					)
				)
				ECHO(!_pref!>>%~2
			)
		) ELSE (
			ECHO(!_pref!>>%~2
		)
	) ELSE (
		ECHO(!_pref!>>%~2
	)
	ENDLOCAL
)
ENDLOCAL
DEL /F %~1 temp123 >nul
GOTO :EOF
REM ############################