Added mechanism for retrieving in-progress session data.

backend/src/main/kotlin/uk/co/neviyn/observationdatabase/GroupSessionManager.kt

@@ -80,4 +80,8 @@ object GroupSessionManager {
     fun updateObservationData(input: GroupObservation) {
         observations[input.person] = input
     }
+
+    fun participantExistsInSession(name: String): Boolean = observations.containsKey(name)
+
+    fun getObservationDataForParticipant(name: String): GroupObservation? = observations[name]
 }

backend/src/main/kotlin/uk/co/neviyn/observationdatabase/controller/GroupSessionController.kt

@@ -120,6 +120,16 @@ class GroupSessionController {
         return committedObservation
     }
 
+    /**
+     * Get the current observation data for a user with [name] in the current session.
+     */
+    @GetMapping("/participant/{name}")
+    fun getParticipantData(@PathVariable name: String): GroupObservation{
+        if(GroupSessionManager.participantExistsInSession(name))
+            return GroupSessionManager.getObservationDataForParticipant(name)!!
+        throw ResponseStatusException(HttpStatus.NOT_FOUND, "No participant with the name:'$name'")
+    }
+
     /**
      * Submit an observation to be added to the session state and actual database
      */

backend/src/test/kotlin/uk/co/neviyn/observationdatabase/controller/GroupSessionControllerTest.kt

@@ -12,7 +12,6 @@ import org.mockito.Mockito
 import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
 import org.mockito.junit.MockitoJUnitRunner
-import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.messaging.simp.SimpMessagingTemplate
 import org.springframework.web.server.ResponseStatusException
 import uk.co.neviyn.observationdatabase.GroupObservation
@@ -150,4 +149,26 @@ class GroupSessionControllerTest {
         assertEquals("A Student", GroupSessionManager.observations.keys.first())
         assertEquals("A Student", GroupSessionManager.observations.values.first().person)
     }
+
+    @Test(expected = ResponseStatusException::class)
+    fun testGetParticipantData_NoParticipant() {
+        controller.getParticipantData("Someone")
+    }
+
+    @Test(expected = ResponseStatusException::class)
+    fun testGetParticipantData_WrongName() {
+        val rc = RatingComponent(rating = 5)
+        val testData = GroupObservation("A Student", listOf(Scenario(0, "Sample title", rc, rc, rc, rc, rc, rc, rc, rc)))
+        GroupSessionManager.observations["A Student"] = testData
+        controller.getParticipantData("Another Student")
+    }
+
+    @Test
+    fun testGetParticipantData() {
+        val rc = RatingComponent(rating = 5)
+        val testData = GroupObservation("A Student", listOf(Scenario(0, "Sample title", rc, rc, rc, rc, rc, rc, rc, rc)))
+        GroupSessionManager.observations["A Student"] = testData
+        val output = controller.getParticipantData("A Student")
+        assertEquals(testData, output)
+    }
 }