Change PodcastChannel id type to String.

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

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

@@ -30,7 +30,7 @@ class SubsonicApiGetPodcastsTest : SubsonicAPIClientTest() {
         val podcastChannelsList = response.body().podcastChannels
         podcastChannelsList.size `should equal to` 1
         with(podcastChannelsList[0]) {
-            id `should equal to` 2
+            id `should equal to` "2"
             url `should equal to` "http://feeds.codenewbie.org/cnpodcast.xml"
             title `should equal to` "CodeNewbie"
             description `should equal to` "Stories and interviews from people on their coding journey."

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

@@ -3,7 +3,7 @@ package org.moire.ultrasonic.api.subsonic.models
 import com.fasterxml.jackson.annotation.JsonProperty
 
 data class PodcastChannel(
-        val id: Long = -1,
+        val id: String = "",
         val url: String = "",
         val title: String = "",
         val description: String = "",

ultrasonic/src/main/kotlin/org/moire/ultrasonic/data/APIPodcastConverter.kt

@@ -7,7 +7,7 @@ import org.moire.ultrasonic.api.subsonic.models.PodcastChannel
 import org.moire.ultrasonic.domain.PodcastsChannel
 
 fun PodcastChannel.toDomainEntity(): PodcastsChannel = PodcastsChannel(
-        this.id.toString(), this.title, this.url, this.description, this.status)
+        this.id, this.title, this.url, this.description, this.status)
 
 fun List<PodcastChannel>.toDomainEntitiesList(): List<PodcastsChannel> = this
         .map { it.toDomainEntity() }

ultrasonic/src/test/kotlin/org/moire/ultrasonic/data/APIPodcastConverterTest.kt

@@ -8,19 +8,19 @@ import org.junit.Test
 import org.moire.ultrasonic.api.subsonic.models.PodcastChannel
 
 /**
- * Unit test for extension functions in [APIPodcastConverter.kt] file.
+ * Unit test for extension functions in APIPodcastConverter.kt file.
  */
 class APIPodcastConverterTest {
     @Test
     fun `Should convert podcast channel entity to domain entity`() {
-        val entity = PodcastChannel(id = 452L, url = "some-url", title = "some-title",
+        val entity = PodcastChannel(id = "452", url = "some-url", title = "some-title",
                 description = "some-description", coverArt = "cA", originalImageUrl = "image-url",
                 status = "podcast-status", errorMessage = "some-error-message")
 
         val converterEntity = entity.toDomainEntity()
 
         with(converterEntity) {
-            id = entity.id.toString()
+            id = entity.id
             description = entity.description
             status = entity.status
             title = entity.title
@@ -31,8 +31,8 @@ class APIPodcastConverterTest {
     @Test
     fun `Should convert list of podcasts channels to domain entites list`() {
         val entitiesList = listOf(
-                PodcastChannel(id = 932L, title = "title1"),
-                PodcastChannel(id = 12L, title = "title2"))
+                PodcastChannel(id = "932", title = "title1"),
+                PodcastChannel(id = "12", title = "title2"))
 
         val converted = entitiesList.toDomainEntitiesList()