Allow admins to upload room images

• critical section around claiming request to prevent two TAs getting the same request
• fix waiting times
• fix for buttons in Safari browser
• fix for showing history for users with requests in deleted labs
• fix for accidental double approve/reject leading to access denied pages
• reintroduce option for having room layout pictures
• export is now CSV

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

@@ -17,6 +17,7 @@
  */
 package nl.tudelft.queue.controller;
 
+import java.io.IOException;
 import java.time.LocalDateTime;
 import java.util.List;
 
@@ -30,10 +31,12 @@ import nl.tudelft.labracore.api.dto.CourseCreateDTO;
 import nl.tudelft.labracore.lib.security.user.AuthenticatedPerson;
 import nl.tudelft.labracore.lib.security.user.Person;
 import nl.tudelft.queue.cache.EditionCacheManager;
+import nl.tudelft.queue.cache.RoomCacheManager;
 import nl.tudelft.queue.cache.SessionCacheManager;
 import nl.tudelft.queue.dto.create.QueueCourseCreateDTO;
 import nl.tudelft.queue.model.labs.Lab;
 import nl.tudelft.queue.repository.LabRepository;
+import nl.tudelft.queue.service.AdminService;
 import nl.tudelft.queue.service.LabService;
 
 import org.springframework.beans.factory.annotation.Autowired;
@@ -45,6 +48,7 @@ import org.springframework.web.bind.annotation.*;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.multipart.MultipartFile;
 
 @Controller
 @PreAuthorize("@permissionService.isAdmin()")
@@ -73,6 +77,12 @@ public class AdminController {
 	@Autowired
 	private SessionCacheManager sCache;
 
+	@Autowired
+	private AdminService adminService;
+
+	@Autowired
+	private RoomCacheManager rCache;
+
 	/**
 	 * Adds a model attribute to every template resolution for recognizing the type of page we are in. For
 	 * this controller all pages will be in the "admin"-area.
@@ -179,6 +189,36 @@ public class AdminController {
 		return "redirect:/admin";
 	}
 
+	/**
+	 * Gets a list of all currently available rooms.
+	 *
+	 * @param  model The model to fill out for Thymeleaf template resolution.
+	 * @return       The thymeleaf template to resolve.
+	 */
+	@GetMapping("/rooms")
+	public String getAllRooms(Model model) {
+		model.addAttribute("rooms", rCache.getAll());
+		return "admin/view/rooms";
+	}
+
+	/**
+	 * Saves a room image for a specific room
+	 *
+	 * @param  id          The id of the room for which to save the image
+	 * @param  map         The file to be saved for this rooom
+	 * @return             A redirect to the admin page
+	 * @throws IOException
+	 */
+	@PostMapping("/room/{id}")
+	public String saveRoomImage(@PathVariable("id") Long id,
+			@RequestParam("map") MultipartFile map) throws IOException {
+		var extension = map.getOriginalFilename().split("\\.")[map.getOriginalFilename().split("\\.").length
+				- 1];
+		String fileName = "room-" + id + "." + extension;
+		adminService.uploadFile(map, fileName);
+		return "redirect:/admin";
+	}
+
 	/**
 	 * Gets the number of ongoing sessions for the admin user to see.
 	 *