Resolve "[Queue-2.0] Slot selection is shown to be open too much"

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Closes #440 (closed)

src/main/java/nl/tudelft/queue/controller/LabController.java

@@ -181,6 +181,24 @@ public class LabController {
 		return "redirect:/lab/" + lab.getId();
 	}
 
+	/**
+	 * Handles post request to the close enqueue page. This simply handles a button press to close or open
+	 * enqueueing in a lab manually.
+	 *
+	 * @param  lab          The lab that is to be closed or opened manually.
+	 * @param  closeEnqueue Whether to open or to close.
+	 * @return              A redirect to the lab overview page.
+	 */
+	@Transactional
+	@PostMapping("/lab/{lab}/close-enqueue/{closeEnqueue}")
+	@PreAuthorize("@permissionService.canManageLab(#lab)")
+	public String closeEnqueueInLab(@PathEntity Lab lab,
+			@PathVariable Boolean closeEnqueue) {
+		lab.setEnqueueClosed(closeEnqueue);
+
+		return "redirect:/lab/" + lab.getId();
+	}
+
 	/**
 	 * Performs the 'revoke request' command and redirects the user back to the lab overview page.
 	 *