Add an endpoint for Bob

ChatApp/app/src/androidTest/kotlin/com/example/chatapp/appfunctions/AppFunctionInstrumentationTest.kt

@@ -95,7 +95,7 @@ class AppFunctionInstrumentationTest {
                     .getAppFunctionData(ExecuteAppFunctionResponse.Success.PROPERTY_RETURN_VALUE)
                     ?.getString("message"),
             )
-                .isEqualTo("Message sent to recipient: Alice Smith.")
+                .isEqualTo("Message sent to: Alice Smith.")
             // Verify that the message was actually saved in the repository
             val messages = messageRepository.getMessages(testRecipient.id).first()
             assertThat(messages).isNotEmpty()

ChatApp/app/src/androidTest/kotlin/com/example/chatapp/appfunctions/AppFunctionsTest.kt

@@ -237,4 +237,12 @@ class AppFunctionsTest {
             appFunctions.makeCall(testContext, endpointValue = "nonexistent_id")
         }
     }
+
+    @Test(expected = AppFunctionInvalidArgumentException::class)
+    fun makeCall_duplicateContactName_fails() {
+        runBlocking {
+            // "Bob Johnson" has two entries (ID 2 and ID 7)
+            appFunctions.makeCall(testContext, contactName = "Bob Johnson")
+        }
+    }
 }

ChatApp/app/src/main/kotlin/com/example/chatapp/data/CallManager.kt

@@ -41,7 +41,9 @@ class CallManager
                     ?: recipientsRepository.getGroupById(recipientId)?.let {
                         Recipient(it.id, it.name, "")
                     }
-                    ?: recipientsRepository.getRecipientByName(recipientId)
+                    ?: recipientsRepository.getRecipientByName(recipientId).let { list ->
+                        if (list.size == 1) list.first() else null
+                    }
                     ?: Recipient(recipientId, recipientId, "")
             startCall(recipient)
         }

ChatApp/app/src/main/kotlin/com/example/chatapp/data/RecipientsRepository.kt

@@ -39,6 +39,7 @@ class RecipientsRepository
                 Recipient(id = "4", name = "David Wilson", email = "david@example.com"),
                 Recipient(id = "5", name = "Eve Davis", email = "eve@example.com"),
                 Recipient(id = "6", name = "Frank Miller", email = "frank@example.com"),
+                Recipient(id = "7", name = "Bob Johnson", email = "bob2@example.com"),
             )
 
         private val groups =
@@ -159,7 +160,7 @@ class RecipientsRepository
 
         fun getRecipientById(id: String): Recipient? = recipients.singleOrNull { it.id == id }
 
-        fun getRecipientByName(name: String): Recipient? = recipients.singleOrNull { it.name == name }
+        fun getRecipientByName(name: String): List<Recipient> = recipients.filter { it.name == name }
 
         fun getGroupById(id: String): ChatGroup? = groups.singleOrNull { it.id == id }
     }

ChatApp/shared/src/main/kotlin/com/example/chatapp/ChatViewModel.kt

@@ -85,7 +85,9 @@ class ChatViewModel
                 ?: recipientsRepository.getGroupById(recipientId)?.let {
                     Recipient(it.id, it.name, "")
                 }
-                ?: recipientsRepository.getRecipientByName(recipientId)
+                ?: recipientsRepository.getRecipientByName(recipientId).let { list ->
+                    if (list.size == 1) list.first() else null
+                }
                 ?: if (recipientId == "bot") {
                     Recipient("bot", "Assistant", "bot@example.com")
                 } else {

ChatApp/shared/src/main/kotlin/com/example/chatapp/appfunctions/AppFunctions.kt

@@ -158,10 +158,18 @@ class AppFunctions
             val recipient =
                 with(recipientsRepository) {
                     if (endpointValue == null) {
-                        getRecipientByName(checkNotNull(contactName))
-                            ?: throw AppFunctionElementNotFoundException(
+                        val matches = getRecipientByName(checkNotNull(contactName))
+                        if (matches.isEmpty()) {
+                            throw AppFunctionElementNotFoundException(
                                 "No recipient exists for contactName: $contactName",
                             )
+                        }
+                        if (matches.size > 1) {
+                            throw AppFunctionInvalidArgumentException(
+                                "Multiple contacts found with name $contactName. Please be more specific.",
+                            )
+                        }
+                        matches.first()
                     } else {
                         getRecipientById(endpointValue)
                             ?: throw AppFunctionElementNotFoundException(

ChatApp/shared/src/main/kotlin/com/example/chatapp/data/CallManager.kt

@@ -41,7 +41,9 @@ class CallManager
                     ?: recipientsRepository.getGroupById(recipientId)?.let {
                         Recipient(it.id, it.name, "")
                     }
-                    ?: recipientsRepository.getRecipientByName(recipientId)
+                    ?: recipientsRepository.getRecipientByName(recipientId).let { list ->
+                        if (list.size == 1) list.first() else null
+                    }
                     ?: Recipient(recipientId, recipientId, "")
             startCall(recipient)
         }

ChatApp/shared/src/main/kotlin/com/example/chatapp/data/RecipientsRepository.kt

@@ -39,6 +39,7 @@ class RecipientsRepository
                 Recipient(id = "4", name = "David Wilson", email = "david@example.com"),
                 Recipient(id = "5", name = "Eve Davis", email = "eve@example.com"),
                 Recipient(id = "6", name = "Frank Miller", email = "frank@example.com"),
+                Recipient(id = "7", name = "Bob Johnson", email = "bob2@example.com"),
             )
 
         private val groups =
@@ -159,7 +160,7 @@ class RecipientsRepository
 
         fun getRecipientById(id: String): Recipient? = recipients.singleOrNull { it.id == id }
 
-        fun getRecipientByName(name: String): Recipient? = recipients.singleOrNull { it.name == name }
+        fun getRecipientByName(name: String): List<Recipient> = recipients.filter { it.name == name }
 
         fun getGroupById(id: String): ChatGroup? = groups.singleOrNull { it.id == id }
     }