Notifications: Add route to view active push notification tokens

src/main/java/de/tum/cit/aet/artemis/communication/dto/PushNotificationDeviceConfigurationDTO.java

@@ -0,0 +1,9 @@
+package de.tum.cit.aet.artemis.communication.dto;
+
+import java.util.Date;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+@JsonInclude(JsonInclude.Include.NON_EMPTY)
+public record PushNotificationDeviceConfigurationDTO(String deviceType, String token, String secretKey, Date expirationDate, String apiType, String userLogin) {
+}

src/main/java/de/tum/cit/aet/artemis/communication/repository/PushNotificationDeviceConfigurationRepository.java

@@ -38,6 +38,8 @@ WHERE p.expirationDate > CURRENT_TIMESTAMP()
             """)
     List<PushNotificationDeviceConfiguration> findByUserIn(@Param("users") Set<User> users, @Param("deviceType") PushNotificationDeviceType deviceType);
 
+    List<PushNotificationDeviceConfiguration> findPushNotificationDeviceConfigurationsByOwner(User owner);
+
     /**
      * Cleans up the old/expired push notifications device configurations
      */

src/main/java/de/tum/cit/aet/artemis/communication/web/PushNotificationResource.java

@@ -4,8 +4,10 @@
 
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
+import java.util.Arrays;
 import java.util.Base64;
 import java.util.Date;
+import java.util.List;
 
 import jakarta.validation.Valid;
 
@@ -15,10 +17,12 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.context.annotation.Profile;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -27,6 +31,8 @@
 import de.tum.cit.aet.artemis.communication.domain.push_notification.PushNotificationApiType;
 import de.tum.cit.aet.artemis.communication.domain.push_notification.PushNotificationDeviceConfiguration;
 import de.tum.cit.aet.artemis.communication.domain.push_notification.PushNotificationDeviceConfigurationId;
+import de.tum.cit.aet.artemis.communication.domain.push_notification.PushNotificationDeviceType;
+import de.tum.cit.aet.artemis.communication.dto.PushNotificationDeviceConfigurationDTO;
 import de.tum.cit.aet.artemis.communication.dto.PushNotificationRegisterBody;
 import de.tum.cit.aet.artemis.communication.dto.PushNotificationRegisterDTO;
 import de.tum.cit.aet.artemis.communication.dto.PushNotificationUnregisterRequest;
@@ -134,6 +140,27 @@ public ResponseEntity<Void> unregister(@Valid @RequestBody PushNotificationUnreg
         return ResponseEntity.ok().build();
     }
 
+    /**
+     * API endpoint to view user tokens
+     *
+     * @return the users push tokens
+     */
+    @GetMapping(value = "push-tokens", produces = MediaType.APPLICATION_JSON_VALUE)
+    @EnforceAtLeastStudent
+    public ResponseEntity<List<PushNotificationDeviceConfigurationDTO>> userTokens() {
+        var user = userRepository.getUser();
+
+        var tokens = pushNotificationDeviceConfigurationRepository.findPushNotificationDeviceConfigurationsByOwner(user);
+
+        List<PushNotificationDeviceConfigurationDTO> ret = tokens.stream()
+                .map(token -> new PushNotificationDeviceConfigurationDTO(token.getDeviceType() == PushNotificationDeviceType.APNS ? "APNS" : "Firebase", token.getToken(),
+                        Arrays.toString(token.getSecretKey()), token.getExpirationDate(), token.getApiType() == PushNotificationApiType.DEFAULT ? "DEFAULT" : "V2",
+                        user.getLogin()))
+                .toList();
+
+        return ResponseEntity.ok(ret);
+    }
+
     private String getToken() {
         // TODO: we should rather get the token from the cookie, e.g. something like Cookie jwtCookie = WebUtils.getCookie(httpServletRequest, JWT_COOKIE_NAME);
         UsernamePasswordAuthenticationToken auth = (UsernamePasswordAuthenticationToken) SecurityContextHolder.getContext().getAuthentication();