feat(content): 랭킹 API 계약을 추가한다

app/src/main/java/kr/co/vividnext/sodalive/v2/main/content/data/AudioRankingsApi.kt

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+package kr.co.vividnext.sodalive.v2.main.content.data
+
+import io.reactivex.rxjava3.core.Single
+import kr.co.vividnext.sodalive.common.ApiResponse
+import retrofit2.http.GET
+import retrofit2.http.Header
+import retrofit2.http.Query
+
+interface AudioRankingsApi {
+    @GET("/api/v2/audio/rankings")
+    fun getRankings(
+        @Header("Authorization") authHeader: String,
+        @Query("type") type: AudioRankingType
+    ): Single<ApiResponse<AudioRankingResponse>>
+}

app/src/main/java/kr/co/vividnext/sodalive/v2/main/content/data/AudioRankingsModels.kt

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+package kr.co.vividnext.sodalive.v2.main.content.data
+
+import androidx.annotation.Keep
+import com.google.gson.annotations.SerializedName
+
+@Keep
+data class AudioRankingResponse(
+    @SerializedName("showRankChange") val showRankChange: Boolean,
+    @SerializedName("type") val type: AudioRankingType,
+    @SerializedName("items") val items: List<AudioRankingItemResponse>
+)
+
+enum class AudioRankingType(
+    val queryValue: String,
+    val label: String
+) {
+    WEEKLY_POPULAR("WEEKLY_POPULAR", "주간 인기"),
+    RISING("RISING", "지금 뜨는 중"),
+    REVENUE("REVENUE", "매출"),
+    SALES_COUNT("SALES_COUNT", "판매량"),
+    COMMENT_COUNT("COMMENT_COUNT", "댓글수"),
+    LIKE_COUNT("LIKE_COUNT", "좋아요")
+}
+
+@Keep
+data class AudioRankingItemResponse(
+    @SerializedName("contentId") val contentId: Long,
+    @SerializedName("title") val title: String,
+    @SerializedName("creatorNickname") val creatorNickname: String,
+    @SerializedName("rank") val rank: Int,
+    @SerializedName("rankChange") val rankChange: Int?,
+    @SerializedName("isNew") val isNew: Boolean,
+    @SerializedName("coverImageUrl") val coverImageUrl: String?
+)

app/src/main/java/kr/co/vividnext/sodalive/v2/main/content/data/AudioRankingsRepository.kt

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+package kr.co.vividnext.sodalive.v2.main.content.data
+
+class AudioRankingsRepository(private val api: AudioRankingsApi) {
+    fun getRankings(token: String, type: AudioRankingType) = api.getRankings(
+        authHeader = token,
+        type = type
+    )
+}

app/src/test/java/kr/co/vividnext/sodalive/v2/main/content/AudioRankingTypeTest.kt

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+package kr.co.vividnext.sodalive.v2.main.content
+
+import kr.co.vividnext.sodalive.v2.main.content.data.AudioRankingType
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class AudioRankingTypeTest {
+
+    @Test
+    fun `랭킹 타입은 PRD 순서를 유지한다`() {
+        assertEquals(
+            listOf(
+                AudioRankingType.WEEKLY_POPULAR,
+                AudioRankingType.RISING,
+                AudioRankingType.REVENUE,
+                AudioRankingType.SALES_COUNT,
+                AudioRankingType.COMMENT_COUNT,
+                AudioRankingType.LIKE_COUNT
+            ),
+            AudioRankingType.entries
+        )
+    }
+
+    @Test
+    fun `랭킹 타입 query value는 enum name을 사용한다`() {
+        assertEquals(
+            listOf(
+                "WEEKLY_POPULAR",
+                "RISING",
+                "REVENUE",
+                "SALES_COUNT",
+                "COMMENT_COUNT",
+                "LIKE_COUNT"
+            ),
+            AudioRankingType.entries.map { it.queryValue }
+        )
+    }
+
+    @Test
+    fun `랭킹 타입 label은 PRD 순서를 유지한다`() {
+        assertEquals(
+            listOf("주간 인기", "지금 뜨는 중", "매출", "판매량", "댓글수", "좋아요"),
+            AudioRankingType.entries.map { it.label }
+        )
+    }
+}