WIP: controllers check for owner or guest, device service needs review

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/DimmableLightController.java

@@ -35,12 +35,18 @@ public class DimmableLightController {
         return dimmableLightRepository.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private DimmableLight save(DimmableLight initial, DimmableSaveRequest dl, String username) {
+    private DimmableLight save(
+            DimmableLight initial, DimmableSaveRequest dl, String username, Long hostId)
+            throws NotFoundException {
         initial.setIntensity(dl.getIntensity());
         initial.setName(dl.getName());
         initial.setRoomId(dl.getRoomId());
 
-        return deviceService.saveAsOwner(initial, username);
+        if (hostId == null) {
+            return deviceService.saveAsOwner(initial, username);
+        } else {
+            return deviceService.saveAsGuest(initial, username, hostId);
+        }
     }
 
     /*
@@ -49,8 +55,9 @@ public class DimmableLightController {
     */
     @PostMapping
     public DimmableLight create(
-            @Valid @RequestBody DimmableSaveRequest dl, final Principal principal) {
+            @Valid @RequestBody DimmableSaveRequest dl, final Principal principal)
-        return save(new DimmableLight(), dl, principal.getName());
+            throws NotFoundException {
+        return save(new DimmableLight(), dl, principal.getName(), null);
     }
 
     private DimmableLight fetchIfOwnerOrGuest(final Principal principal, Long id, Long hostId)
@@ -79,15 +86,18 @@ public class DimmableLightController {
     }
 
     /*
-       Here you must behave differently if hostId is given or not:
+      Logic for saving either as owner or guest is handled in method save of this controller
-       - if not given, assume the owner of the device wants to update the device. In this case, save with DeviceService.saveAsOwner();
-       - if given, assume a guest wants to update the intensity of this light. In this case, save with DeviceService.saveAsGuest();
     */
     @PutMapping
     public DimmableLight update(
             @Valid @RequestBody DimmableSaveRequest sp, final Principal principal, Long hostId)
             throws NotFoundException {
-        return save(fetchIfOwnerOrGuest(principal, sp.getId(), hostId), sp, principal.getName());
+
+        return save(
+                fetchIfOwnerOrGuest(principal, sp.getId(), hostId),
+                sp,
+                principal.getName(),
+                hostId);
     }
 
     @DeleteMapping("/{id}")

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/RegularLightController.java

@@ -63,25 +63,36 @@ public class RegularLightController {
         return regularLightService.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private RegularLight save(RegularLight initial, SwitchableSaveRequest rl, String username) {
+    private RegularLight save(
+            RegularLight initial, SwitchableSaveRequest rl, String username, Long hostId)
+            throws NotFoundException {
         initial.setName(rl.getName());
         initial.setRoomId(rl.getRoomId());
         initial.setOn(rl.isOn());
 
-        return deviceService.saveAsOwner(initial, username);
+        if (hostId == null) {
+            return deviceService.saveAsOwner(initial, username);
+        } else {
+            return deviceService.saveAsGuest(initial, username, hostId);
+        }
     }
 
     @PostMapping
     public RegularLight create(
-            @Valid @RequestBody SwitchableSaveRequest rl, final Principal principal) {
+            @Valid @RequestBody SwitchableSaveRequest rl, final Principal principal)
-        return save(new RegularLight(), rl, principal.getName());
+            throws NotFoundException {
+        return save(new RegularLight(), rl, principal.getName(), null);
     }
 
     @PutMapping
     public RegularLight update(
             @Valid @RequestBody SwitchableSaveRequest rl, final Principal principal, Long hostId)
             throws NotFoundException {
-        return save(fetchIfOwnerOrGuest(principal, rl.getId(), hostId), rl, principal.getName());
+        return save(
+                fetchIfOwnerOrGuest(principal, rl.getId(), hostId),
+                rl,
+                principal.getName(),
+                hostId);
     }
 
     @DeleteMapping("/{id}")

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/service/DeviceService.java

@@ -1,10 +1,13 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.service;
 
+import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonExclude;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.Device;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.DeviceRepository;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.User;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.UserRepository;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.socket.SensorSocketEndpoint;
+import java.beans.Transient;
 import java.util.Set;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
@@ -21,15 +24,48 @@ public class DeviceService {
     TODO: remember to put a @Transient @GsonIgnore (but not @SocketGsonIgnore) property on device to signal a device update
             TODO: coming from DeviceService.saveAsGuest()
      */
+    public <T extends Device> T saveAsGuest(
+            @Transient @GsonExclude T device, String guestUsername, Long hostId)
+            throws NotFoundException {
+        final User currentUser = userRepository.findByUsername(guestUsername);
+        final User host = userRepository.findById(hostId).orElseThrow(NotFoundException::new);
+        final Set<User> guests = host.getGuests();
 
-    // TODO: create saveAsGuest(device, guestUsername, hostId)
+        // filter out currentUser from guests as we do not want to broadcast an update to the
+        // updating user itself
+        if (guests.contains(currentUser)) {
+            guests.remove(currentUser);
+        }
+
+        // broadcasting from not a host
+        device.setFromHost(false);
+        // broadcast device update for host
+        endpoint.queueDeviceUpdate(device, host);
+        userRepository.save(host);
+        endpoint.flushDeviceUpdates();
+        for (final User guest : guests) {
+            // enqueue all device updates for all other guests
+            endpoint.queueDeviceUpdate(device, guest);
+            userRepository.save(guest);
+        }
+        // broadcast device updates for all other guests
+        endpoint.flushDeviceUpdates();
+        return deviceRepository.save(device);
+    }
 
     public <T extends Device> T saveAsOwner(T device, String username) {
         final User user = userRepository.findByUsername(username);
         final Set<User> guests = user.getGuests();
+        // make sure we're broadcasting from host
+        device.setFromHost(true);
         for (final User guest : guests) {
-            // set set from host true
+            // broadcast to endpoint the object device, with receiving user set to guest
-            // broadcast to endpoint the object device, with recieving user set to guest
+            endpoint.queueDeviceUpdate(device, guest);
+            userRepository.save(guest);
         }
+        // after queueing the device update for each user, flush them all in a single message
+        // can be moved inside the foreach loop to send a single message for each update enqueued
+        endpoint.flushDeviceUpdates();
+        return deviceRepository.save(device);
     }
 }