Add getMusicFolders api request.

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

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

@@ -9,6 +9,7 @@ import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
 import org.moire.ultrasonic.api.subsonic.models.License
+import org.moire.ultrasonic.api.subsonic.models.MusicFolder
 import org.moire.ultrasonic.api.subsonic.response.SubsonicResponse
 import org.moire.ultrasonic.api.subsonic.rules.MockWebServerRule
 import retrofit2.Response
@@ -47,8 +48,7 @@ class SubsonicAPITest {
 
         assertResponseSuccessful(response)
         with(response.body()) {
-            status `should be` SubsonicResponse.Status.OK
+            assertBaseResponseOk()
-            version `should be` SubsonicAPIVersions.V1_13_0
         }
     }
 
@@ -65,8 +65,7 @@ class SubsonicAPITest {
 
         assertResponseSuccessful(response)
         with(response.body()) {
-            status `should be` SubsonicResponse.Status.OK
+            assertBaseResponseOk()
-            version `should be` SubsonicAPIVersions.V1_13_0
             license `should equal` License(true, parseDate("2016-11-23T20:17:15.206Z"))
         }
     }
@@ -78,6 +77,26 @@ class SubsonicAPITest {
         response.license `should be` null
     }
 
+    @Test
+    fun `Should parse get music folders ok response`() {
+        enqueueResponse("get_music_directories_ok.json")
+
+        val response = api.getApi().getMusicFolders().execute()
+
+        assertResponseSuccessful(response)
+        with(response.body()) {
+            assertBaseResponseOk()
+            musicFolders `should equal` listOf(MusicFolder(0, "Music"), MusicFolder(2, "Test"))
+        }
+    }
+
+    @Test
+    fun `Should parse get music folders error response`() {
+        val response = checkErrorCallParsed { api.getApi().getMusicFolders().execute() }
+
+        response.musicFolders `should be` null
+    }
+
     private fun enqueueResponse(resourceName: String) {
         mockWebServerRule.mockWebServer.enqueue(MockResponse()
                 .setBody(loadJsonResponse(resourceName)))
@@ -113,4 +132,10 @@ class SubsonicAPITest {
         }
         return response.body()
     }
+
+    private fun SubsonicResponse.assertBaseResponseOk() {
+        status `should be` SubsonicResponse.Status.OK
+        version `should be` SubsonicAPIVersions.V1_13_0
+        error `should be` null
+    }
 }

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

@@ -6,6 +6,9 @@
       "musicFolder" : [ {
         "id" : 0,
         "name" : "Music"
+      }, {
+        "id" : 2,
+        "name" : "Test"
       } ]
     }
   }

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

@@ -1,6 +1,7 @@
 package org.moire.ultrasonic.api.subsonic
 
 import org.moire.ultrasonic.api.subsonic.response.LicenseResponse
+import org.moire.ultrasonic.api.subsonic.response.MusicFoldersResponse
 import org.moire.ultrasonic.api.subsonic.response.SubsonicResponse
 import retrofit2.Call
 import retrofit2.http.GET
@@ -14,4 +15,7 @@ interface SubsonicAPIDefinition {
 
     @GET("getLicense.view")
     fun getLicense(): Call<LicenseResponse>
+
+    @GET("getMusicFolders.view")
+    fun getMusicFolders(): Call<MusicFoldersResponse>
 }

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

@@ -0,0 +1,3 @@
+package org.moire.ultrasonic.api.subsonic.models
+
+data class MusicFolder(val id: Long, val name: String)

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

@@ -0,0 +1,33 @@
+package org.moire.ultrasonic.api.subsonic.response
+
+import com.fasterxml.jackson.core.JsonParser
+import com.fasterxml.jackson.core.JsonToken
+import com.fasterxml.jackson.databind.DeserializationContext
+import com.fasterxml.jackson.databind.JsonDeserializer
+import com.fasterxml.jackson.databind.JsonMappingException
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize
+import org.moire.ultrasonic.api.subsonic.SubsonicAPIVersions
+import org.moire.ultrasonic.api.subsonic.SubsonicError
+import org.moire.ultrasonic.api.subsonic.models.MusicFolder
+
+class MusicFoldersResponse(status: Status,
+                           version: SubsonicAPIVersions,
+                           error: SubsonicError?,
+                           @JsonDeserialize(using = MusicFoldersDeserializer::class)
+                           val musicFolders: List<MusicFolder>?):
+        SubsonicResponse(status, version, error) {
+    companion object {
+        class MusicFoldersDeserializer(): JsonDeserializer<List<MusicFolder>>() {
+            override fun deserialize(p: JsonParser?, ctxt: DeserializationContext?): List<MusicFolder> {
+                p!!.nextToken()
+                if (p.currentName == "musicFolder" && p.nextToken() == JsonToken.START_ARRAY) {
+                    val mfJavaType = ctxt!!.typeFactory
+                            .constructCollectionType(List::class.java, MusicFolder::class.java)
+                    return ctxt.readValue(p, mfJavaType)
+                }
+
+                throw JsonMappingException(p, "Failed to parse music folders list")
+            }
+        }
+    }
+}