[PM-20193] Migrate DownloadService to network module (#5053)

network/src/main/kotlin/com/bitwarden/network/service/DownloadService.kt

@@ -0,0 +1,13 @@
+package com.bitwarden.network.service
+
+import okhttp3.ResponseBody
+
+/**
+ * Provides an API for querying arbitrary endpoints.
+ */
+interface DownloadService {
+    /**
+     * Streams data from [url], returning a raw [ResponseBody].
+     */
+    suspend fun getDataStream(url: String): Result<ResponseBody>
+}

network/src/main/kotlin/com/bitwarden/network/service/DownloadServiceImpl.kt

@@ -0,0 +1,19 @@
+package com.bitwarden.network.service
+
+import com.bitwarden.network.api.DownloadApi
+import com.bitwarden.network.util.toResult
+import okhttp3.ResponseBody
+
+/**
+ * Default implementation of [DownloadService].
+ */
+class DownloadServiceImpl(
+    private val downloadApi: DownloadApi,
+) : DownloadService {
+    override suspend fun getDataStream(
+        url: String,
+    ): Result<ResponseBody> =
+        downloadApi
+            .getDataStream(url = url)
+            .toResult()
+}

network/src/test/kotlin/com/bitwarden/network/service/DownloadServiceTest.kt

@@ -0,0 +1,32 @@
+package com.bitwarden.network.service
+
+import com.bitwarden.network.api.DownloadApi
+import com.bitwarden.network.base.BaseServiceTest
+import kotlinx.coroutines.test.runTest
+import okhttp3.mockwebserver.MockResponse
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.Test
+import retrofit2.create
+
+class DownloadServiceTest : BaseServiceTest() {
+    private val downloadApi: DownloadApi = retrofit.create()
+
+    private val downloadService: DownloadService = DownloadServiceImpl(
+        downloadApi = downloadApi,
+    )
+
+    @Test
+    fun `getDataStream should return a raw stream RespondBody`() = runTest {
+        server.enqueue(
+            MockResponse()
+                .setResponseCode(200)
+                .setBody("Bitwarden")
+                .setHeader("Content-Type", "application/stream"),
+        )
+        val url = "/test-url"
+        val result = downloadService.getDataStream(url)
+        assertTrue(result.isSuccess)
+        assertEquals("Bitwarden", String(result.getOrThrow().bytes()))
+    }
+}