feat(live): 입장 정책 모델을 추가한다

app/src/main/java/kr/co/vividnext/sodalive/v2/live/action/LiveEntryDecision.kt

@@ -0,0 +1,11 @@
+package kr.co.vividnext.sodalive.v2.live.action
+
+sealed interface LiveEntryDecision {
+    data object ShowDetail : LiveEntryDecision
+
+    data object Enter : LiveEntryDecision
+
+    data class RequestPassword(val can: Int) : LiveEntryDecision
+
+    data object RequestPayment : LiveEntryDecision
+}

app/src/main/java/kr/co/vividnext/sodalive/v2/live/action/LiveEntryPolicy.kt

@@ -0,0 +1,23 @@
+package kr.co.vividnext.sodalive.v2.live.action
+
+data class LiveEntryContext(
+    val channelName: String?,
+    val managerId: Long,
+    val currentUserId: Long,
+    val price: Int,
+    val isPaid: Boolean,
+    val isPrivateRoom: Boolean
+)
+
+object LiveEntryPolicy {
+    fun decide(context: LiveEntryContext): LiveEntryDecision = with(context) {
+        when {
+            channelName.isNullOrBlank() -> LiveEntryDecision.ShowDetail
+            managerId == currentUserId -> LiveEntryDecision.Enter
+            (price == 0 || isPaid) && isPrivateRoom -> LiveEntryDecision.RequestPassword(can = 0)
+            price == 0 || isPaid -> LiveEntryDecision.Enter
+            isPrivateRoom -> LiveEntryDecision.RequestPassword(can = price)
+            else -> LiveEntryDecision.RequestPayment
+        }
+    }
+}

app/src/test/java/kr/co/vividnext/sodalive/v2/live/action/LiveEntryPolicyTest.kt

@@ -0,0 +1,78 @@
+package kr.co.vividnext.sodalive.v2.live.action
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class LiveEntryPolicyTest {
+
+    @Test
+    fun `channel이 없으면 라이브 상세를 표시한다`() {
+        assertEquals(LiveEntryDecision.ShowDetail, decide(channelName = null))
+        assertEquals(LiveEntryDecision.ShowDetail, decide(channelName = " "))
+    }
+
+    @Test
+    fun `channel이 없으면 본인 manager여도 라이브 상세를 우선 표시한다`() {
+        assertEquals(
+            LiveEntryDecision.ShowDetail,
+            decide(channelName = null, managerId = 7L, currentUserId = 7L)
+        )
+    }
+
+    @Test
+    fun `관리자는 가격과 비밀번호보다 우선해 바로 입장한다`() {
+        assertEquals(
+            LiveEntryDecision.Enter,
+            decide(managerId = 7L, currentUserId = 7L, price = 100, isPrivateRoom = true)
+        )
+    }
+
+    @Test
+    fun `무료 또는 결제 완료 공개방은 바로 입장한다`() {
+        assertEquals(LiveEntryDecision.Enter, decide(price = 0))
+        assertEquals(LiveEntryDecision.Enter, decide(price = 100, isPaid = true))
+    }
+
+    @Test
+    fun `무료 또는 결제 완료 비밀번호방은 결제액 없이 비밀번호를 요청한다`() {
+        assertEquals(
+            LiveEntryDecision.RequestPassword(can = 0),
+            decide(price = 0, isPrivateRoom = true)
+        )
+        assertEquals(
+            LiveEntryDecision.RequestPassword(can = 0),
+            decide(price = 100, isPaid = true, isPrivateRoom = true)
+        )
+    }
+
+    @Test
+    fun `미결제 유료 비밀번호방은 가격과 함께 비밀번호를 요청한다`() {
+        assertEquals(
+            LiveEntryDecision.RequestPassword(can = 100),
+            decide(price = 100, isPrivateRoom = true)
+        )
+    }
+
+    @Test
+    fun `미결제 유료 공개방은 결제를 요청한다`() {
+        assertEquals(LiveEntryDecision.RequestPayment, decide(price = 100))
+    }
+
+    private fun decide(
+        channelName: String? = "channel",
+        managerId: Long = 2L,
+        currentUserId: Long = 1L,
+        price: Int = 0,
+        isPaid: Boolean = false,
+        isPrivateRoom: Boolean = false
+    ): LiveEntryDecision = LiveEntryPolicy.decide(
+        LiveEntryContext(
+            channelName = channelName,
+            managerId = managerId,
+            currentUserId = currentUserId,
+            price = price,
+            isPaid = isPaid,
+            isPrivateRoom = isPrivateRoom
+        )
+    )
+}