Add getChatMessages() call.

Signed-off-by: Yahor Berdnikau <egorr.berd@gmail.com>

subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetChatMessagesTest.kt

@@ -0,0 +1,45 @@
+package org.moire.ultrasonic.api.subsonic
+
+import org.amshove.kluent.`should equal to`
+import org.amshove.kluent.`should equal`
+import org.junit.Test
+import org.moire.ultrasonic.api.subsonic.models.ChatMessage
+
+/**
+ * Integration test for [SubsonicAPIDefinition.getChatMessages] call.
+ */
+class SubsonicApiGetChatMessagesTest : SubsonicAPIClientTest() {
+    @Test
+    fun `Should handle error response`() {
+        val response = checkErrorCallParsed(mockWebServerRule) {
+            client.api.getChatMessages().execute()
+        }
+
+        response.chatMessages `should equal` emptyList()
+    }
+
+    @Test
+    fun `Should handle ok response`() {
+        mockWebServerRule.enqueueResponse("get_chat_messages_ok.json")
+
+        val response = client.api.getChatMessages().execute()
+
+        assertResponseSuccessful(response)
+        with(response.body().chatMessages) {
+            size `should equal to` 2
+            this[0] `should equal` ChatMessage(username = "sindre", time = 1269771845310,
+                    message = "Sindre was here")
+            this[1] `should equal` ChatMessage(username = "ben", time = 1269771842504,
+                    message = "Ben too")
+        }
+    }
+
+    @Test
+    fun `Should pass since in request param`() {
+        val since = 21388L
+
+        mockWebServerRule.assertRequestParam(expectedParam = "since=$since") {
+            client.api.getChatMessages(since = since).execute()
+        }
+    }
+}

subsonic-api/src/integrationTest/resources/get_chat_messages_ok.json

@@ -0,0 +1,17 @@
+{
+  "subsonic-response" : {
+    "status" : "ok",
+    "version" : "1.15.0",
+    "chatMessages" : {
+      "chatMessage" : [ {
+        "username" : "sindre",
+        "time" : 1269771845310,
+        "message" : "Sindre was here"
+      }, {
+        "username" : "ben",
+        "time" : 1269771842504,
+        "message" : "Ben too"
+      } ]
+    }
+  }
+}

subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicAPIDefinition.kt

@@ -3,6 +3,7 @@ package org.moire.ultrasonic.api.subsonic
 import okhttp3.ResponseBody
 import org.moire.ultrasonic.api.subsonic.models.AlbumListType
 import org.moire.ultrasonic.api.subsonic.models.JukeboxAction
+import org.moire.ultrasonic.api.subsonic.response.ChatMessagesResponse
 import org.moire.ultrasonic.api.subsonic.response.GenresResponse
 import org.moire.ultrasonic.api.subsonic.response.GetAlbumList2Response
 import org.moire.ultrasonic.api.subsonic.response.GetAlbumListResponse
@@ -212,6 +213,8 @@ interface SubsonicAPIDefinition {
             @Query("musicFolderId") musicFolderId: Long? = null): Call<GetSongsByGenreResponse>
 
     @GET("getUser.view")
-    fun getUser(
+    fun getUser(@Query("username") username: String): Call<GetUserResponse>
-            @Query("username") username: String): Call<GetUserResponse>
+
+    @GET("getChatMessages.view")
+    fun getChatMessages(@Query("since") since: Long? = null): Call<ChatMessagesResponse>
 }

subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/models/ChatMessage.kt

@@ -0,0 +1,6 @@
+package org.moire.ultrasonic.api.subsonic.models
+
+data class ChatMessage(
+        val username: String = "",
+        val time: Long = 0,
+        val message: String = "")

subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/response/ChatMessagesResponse.kt

@@ -0,0 +1,18 @@
+package org.moire.ultrasonic.api.subsonic.response
+
+import com.fasterxml.jackson.annotation.JsonProperty
+import org.moire.ultrasonic.api.subsonic.SubsonicAPIVersions
+import org.moire.ultrasonic.api.subsonic.SubsonicError
+import org.moire.ultrasonic.api.subsonic.models.ChatMessage
+
+class ChatMessagesResponse(
+        status: Status,
+        version: SubsonicAPIVersions,
+        error: SubsonicError?) : SubsonicResponse(status, version, error) {
+    @JsonProperty("chatMessages") private val wrapper = ChatMessagesWrapper()
+
+    val chatMessages: List<ChatMessage> get() = wrapper.messagesList
+}
+
+internal class ChatMessagesWrapper(
+        @JsonProperty("chatMessage") val messagesList: List<ChatMessage> = emptyList())