/*
	 A helper class for installing and parsing files,
	 and generating an uninstallation alias on the fly.

	Example :
		include "utils/installer.kvs"
		%installer = $new(installer,0,myinstaller)
		%installer->$copyFiles(pics,*.png,$file.localdir(pics))
		%installer->$includeFiles(src,*.kvs)
		%installer->generateUninstallAlias("foo::uninstall")
		delete %installer
	Here, "foo::uninstall" must be called in you uninstall
	callback script.

	Warnings:
		1) Declaration of aliases, popups, etc, in source files
		(.kvs) must be in a similar format
		as when you export them directly from kvirc.
		Example:
			alias(myalias)
			defpopup(mypopup)
		2) If you use a "defpopup -m" to add an item to an
		existing popup,this item won't be registered
		automatically for uninstallation by this installer script.
		You should typically identify the item you added using
		the "id" parameter. See this example where the id is
		"myaddon::myitem":
			defpopup -m (channeltextview)
			{
				item(MyItem)(myaddon::myitem)
				{
					...
				}
			}
		Then, you add this line to you uninstall callback
		script:
			delpopupitem channeltextview myaddon::myitem
*/
class(installer,object)
{
	constructor()
	{
	}

	copyFiles($0 = source dir,$1 = file regexp,$2 = target dir)
	{
		if(!$file.exists($0))return
		if($isempty($0))
		{
			echo $tr("[Installer] The first argument to \%installer->\$copyfiles must be a source directory")
			halt
		}

		if($isempty($1))
		{
			echo $tr("[Installer] The second argument to \%installer->\$copyfiles must be a file name or file regexp")
			halt
		}

		if($isempty($2))
		{
			echo $tr("[Installer] The third argument to \%installer->\$copyfiles must be a destination directory")
			halt
		}

		if($file.exists($0))
		{
			%files = $file.ls($file.fixpath($0),f,$1)
			if($length(%files))
			{
				@$mkdir($2)
				foreach(%file,%files)
				{
					$this->%lFiles <+ $str.tqreplace($file.fixpath("$2/%file"),"\\\\","\\")
					file.copy -o $file.fixpath($0/%file) $file.fixpath($2/%file)
				}
			}
		}
	}

	// Recursive creation of directory
	mkdir($0 = directory)
	{
		if($isempty($0) || $file.exists($0)) return
		foreach -a (%subdir,$str.split("/",$file.fixpath($0)))
		{
			%p <+ %subdir
			%path = $str.join("/",%p)
			if(!$file.exists(%path))
				file.mkdir -q %path
		}
		if(!$file.exists($0))
		{
			echo $tr("[Installer] Failed to create directory") \"$0\"
			return
		}
	}

	// Parse source files and get what will need to be uninstalled
	includeFiles($0 = dir, $1 = file regexp)
	{
		if($isempty($0))
		{
			echo $tr("[Installer] The first argument to \%installer->\$includefiles must be a source directory")
			halt
		}

		@$mkdir($0)

		if($1 == "")
			%szRe = "*.kvs"
		else
			%szRe = $1

		%files = $file.ls($file.fixpath($0),f,$1)
		if($length(%files))
		{
			foreach(%file,%files)
			{
				$this->%lSources <+ $str.tqreplace($file.fixpath("$0/%file"),"\\\\","\\")
				include $file.fixpath("$0/%file")
			}
		}
	}


	generateUninstallAlias($0 = alias name)
	{
		%c  = "alias($0)$lf"
		%c .= "{$lf"
		if($isset($this->%lFiles))
		{
			foreach(%file,$this->%lFiles)
			{
				%file =~ s/"^$file.localdir()/(.*)$"/"\$file.localdir(\\1)"/
				%c .= "	file.remove -q \"%file\"$lf";
			}
		}
		if($isset($this->%lSources))
		{
			foreach(%file,$this->%lSources){
				foreach(%line,$file.readlines(%file))
				if(!$str.isempty(%line)){
					if($str.match("event(*)",%line,e))
						%c .= "	event -q ("$str.token(1,"()",%line)"){}$lf"
					else if($str.match("alias(*)",%line,e))
						%aliases<+$str.token(1,"()",%line)
					else if($str.match("defpopup(*)",%line,e))
						%c .= "	defpopup("$str.token(1,"()",%line)"){}$lf"
					else if($str.match("toolbar.create * *",%line,e))
						%c .= "	toolbar.destroy -q "$str.word(1,%line)"$lf"
					else if($str.match("action.create* (*)",%line,e))
						%c .= "	action.destroy -q "$str.tqreplace($str.token(1,"(,)",%line),,\")"$lf"
					else if($str.match("class(*)*",%line,e))
						%c .= "	objects.killclass -q "$str.token(1,"(,)",%line)"$lf"
				}
			}
			if($isset(%aliases))
				foreach(%alias,%aliases)
					%c .= "	alias -q (%alias){}$lf"
			%c .= "	alias -q ($0){}$lf"
		}
		%c .= "}"
		eval %c
	}
}