@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
)
IF "%~1"=="-updatebatch" (
	SET _updateb=1
)
SHIFT
GOTO parse
:endparse
ECHO.
IF DEFINED _updateb (
	ECHO Checking updater version...
	ECHO.
	DEL /F "!_myname!-updated.bat" 2>nul
	powershell -Command "(New-Object Net.WebClient).DownloadFile('https://github.com/ghacksuserjs/ghacks-user.js/raw/master/updater.bat', '!_myname!-updated.bat')" >nul
	IF EXIST "!_myname!-updated.bat" (
		CLS
		START CMD /C "!_myname!-updated.bat" !_myparams!
		DEL /F "!_myname!.bat" 2>nul
		EXIT /B
	) ELSE (
		ECHO Failed. Make sure PowerShell is allowed internet access.
		ECHO.
		PAUSE
		EXIT /B
	)
) ELSE (
	IF NOT "!_myname!"=="!_myname:-updated=X!" (
		CALL :begin
		REN "!_myname!.bat" "!_myname:-updated=!.bat"
		EXIT /B
	)
)
GOTO begin
REM ###### Merge function ######
:merge
FOR /F "tokens=* delims=" %%G IN (%1) DO (
	SET _pref=%%G
	SET "_temp=!_pref: =!"
	IF /I "user"=="!_temp:~0,4!" (
		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 >temp1
			FOR /F "tokens=* delims=" %%X IN (temp1) DO (
				SET _temp=%%X
				SET "_temp=!_temp: =!"
				IF /I "user"=="!_temp:~0,4!" (
					SET _pref=%%X
				)
			)
			ECHO !_pref!>>%2
		)
	) ELSE (
		ECHO !_pref!>>%2
	)
)
DEL /F %1 temp1 2>nul
EXIT /B
REM ############################
:begin
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:*version=version!,!_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 (
	REN user.js.bak user.js.old.bak >nul 2>&1
	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.
				DEL /F user-overrides-merged.js temp2 temp3 2>nul
				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
				DEL /F user.js 2>nul
				CALL :merge temp2 user.js
				REN temp3 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...
				DEL /F user.js temp2 2>nul
				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" (
		DEL /F user.js.old.bak 2>nul
		ECHO Update complete.
	) ELSE (
		IF "!changed!"=="false" (
			DEL /F user.js.bak
			REN user.js.old.bak user.js.bak >nul 2>&1
			ECHO Update completed without changes.
		) ELSE (
			ECHO Update complete.
		)
	)
	ECHO.
) ELSE (
	REN user.js.bak user.js >nul 2>&1
	REN user.js.old.bak user.js.bak >nul 2>&1
	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
)