Redirect utm_* from QS to hash in Nginx

gistfile1.nginxconf

server {
	# ...
	
	location / {
		set $utm_hash "";

		if ($args ~* "^(.*&?)utm_source=([a-zA-Z0-9._-]*)(&(.*))?") {
			set $args $1$4;
			set $utm_hash "$utm_hash&utm_source=$2";
		}

		if ($args ~* "^(.*&?)utm_medium=([a-zA-Z0-9._-]*)(&(.*))?") {
			set $args $1$4;
			set $utm_hash "$utm_hash&utm_medium=$2";
		}

		if ($args ~* "^(.*&?)utm_campaign=([a-zA-Z0-9._-]*)(&(.*))?") {
			set $args $1$4;
			set $utm_hash "$utm_hash&utm_campaign=$2";
		}

		if ($args ~* "^(.*&?)utm_content=([a-zA-Z0-9._-]*)(&(.*))?") {
			set $args $1$4;
			set $utm_hash "$utm_hash&utm_content=$2";
		}

		if ($args ~* "^(.*&?)utm_term=([a-zA-Z0-9._-]*)(&(.*))?") {
			set $args $1$4;
			set $utm_hash "$utm_hash&utm_term=$2";
		}

		if ($args ~* "^(.*)&$") {
			set $args $1;
		}

		if ($utm_hash ~* "^&(.*)$") {
			set $utm_hash $1;
		}

		set $redirect "";

		if ($utm_hash != "") {
			set $redirect "H";
		}

		if ($args != "") {
			set $redirect "Q$redirect";
		}

		if ($redirect = "QH") {
			rewrite "(.*)" $1?$args#$utm_hash? permanent;
		}

		if ($redirect = "H") {
			rewrite "(.*)" $1#$utm_hash? permanent;
		}
		
		# ...
	}
	
	# ...
}

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