Define GMS api service

storage-api-drive-gms/src/main/java/com/omh/android/storage/api/drive/gms/OmhGmsStorageClientImpl.kt

@@ -1,12 +1,15 @@
 package com.omh.android.storage.api.drive.gms
 
+import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential
 import com.omh.android.auth.api.OmhAuthClient
+import com.omh.android.auth.api.models.OmhAuthStatusCodes
 import com.omh.android.storage.api.OmhStorageClient
 import com.omh.android.storage.api.domain.model.OmhStorageException
 import com.omh.android.storage.api.domain.repository.OmhFileRepository
+import com.omh.android.storage.api.drive.gms.data.GoogleDriveApiProvider
+import com.omh.android.storage.api.drive.gms.data.GoogleDriveApiService
 import com.omh.android.storage.api.drive.gms.data.repository.GmsFileRepositoryImpl
 import com.omh.android.storage.api.drive.gms.data.source.GmsFileRemoteDataSourceImpl
-import kotlin.jvm.Throws
 
 internal class OmhGmsStorageClientImpl private constructor(
     authClient: OmhAuthClient
@@ -20,7 +23,14 @@ internal class OmhGmsStorageClientImpl private constructor(
 
     @Throws(OmhStorageException::class)
     override fun getRepository(): OmhFileRepository {
-        val dataSource = GmsFileRemoteDataSourceImpl()
+        val credentials = authClient.getCredentials() as? GoogleAccountCredential
+            ?: throw OmhStorageException.InvalidCredentialsException(OmhAuthStatusCodes.SIGN_IN_FAILED)
+
+        val apiProvider = GoogleDriveApiProvider.getInstance(credentials)
+
+        val apiService = GoogleDriveApiService(apiProvider)
+
+        val dataSource = GmsFileRemoteDataSourceImpl(apiService)
 
         return GmsFileRepositoryImpl(dataSource)
     }

storage-api-drive-gms/src/main/java/com/omh/android/storage/api/drive/gms/data/GoogleDriveApiProvider.kt

@@ -0,0 +1,38 @@
+package com.omh.android.storage.api.drive.gms.data
+
+import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential
+import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport
+import com.google.api.client.http.javanet.NetHttpTransport
+import com.google.api.client.json.JsonFactory
+import com.google.api.client.json.gson.GsonFactory
+import com.google.api.services.drive.Drive
+import com.omh.android.storage.api.drive.gms.BuildConfig
+
+internal class GoogleDriveApiProvider private constructor(private val credential: GoogleAccountCredential) {
+
+    companion object {
+        private var instance: GoogleDriveApiProvider? = null
+
+        internal fun getInstance(omhCredentials: GoogleAccountCredential): GoogleDriveApiProvider {
+            if (instance == null) {
+                instance = GoogleDriveApiProvider(omhCredentials)
+            }
+
+            return instance!!
+        }
+    }
+
+    private val applicationName = BuildConfig.LIBRARY_PACKAGE_NAME
+    private val jsonFactory: JsonFactory = GsonFactory.getDefaultInstance()
+    private val httpTransport: NetHttpTransport = GoogleNetHttpTransport.newTrustedTransport()
+
+    val googleDriveApiService: Drive by lazy { initDriveService() }
+
+    private fun initDriveService(): Drive = Drive
+        .Builder(
+            httpTransport,
+            jsonFactory,
+            credential
+        ).setApplicationName(applicationName)
+        .build()
+}

storage-api-drive-gms/src/main/java/com/omh/android/storage/api/drive/gms/data/GoogleDriveApiService.kt

@@ -0,0 +1,11 @@
+package com.omh.android.storage.api.drive.gms.data
+
+import com.google.api.services.drive.Drive
+
+internal class GoogleDriveApiService(private val apiProvider: GoogleDriveApiProvider) {
+
+    fun getFilesList(): Drive.Files.List = apiProvider
+        .googleDriveApiService
+        .files()
+        .list()
+}

storage-api-drive-gms/src/main/java/com/omh/android/storage/api/drive/gms/data/source/GmsFileRemoteDataSourceImpl.kt

@@ -1,12 +1,19 @@
 package com.omh.android.storage.api.drive.gms.data.source
 
+import com.google.api.services.drive.model.File
+import com.google.api.services.drive.model.FileList
 import com.omh.android.storage.api.data.source.OmhFileRemoteDataSource
 import com.omh.android.storage.api.domain.model.OmhFile
+import com.omh.android.storage.api.drive.gms.data.GoogleDriveApiService
+import com.omh.android.storage.api.drive.gms.data.source.mapper.toOmhFile
 
-internal class GmsFileRemoteDataSourceImpl : OmhFileRemoteDataSource {
+internal class GmsFileRemoteDataSourceImpl(private val apiService: GoogleDriveApiService) :
+    OmhFileRemoteDataSource {
 
     override fun getFilesList(parentId: String): List<OmhFile> {
-        return emptyList()
+        val googleJsonFileList: FileList = apiService.getFilesList().execute()
+        val googleFileList: List<File> = googleJsonFileList.files.toList()
+        return googleFileList.mapNotNull { googleFile -> googleFile.toOmhFile() }
     }
 
     override fun createFile(name: String, mimeType: String, parentId: String?): OmhFile? {

storage-api-drive-gms/src/main/java/com/omh/android/storage/api/drive/gms/data/source/mapper/DataMappers.kt

@@ -0,0 +1,27 @@
+package com.omh.android.storage.api.drive.gms.data.source.mapper
+
+import com.google.api.services.drive.model.File
+import com.omh.android.storage.api.domain.model.OmhFile
+
+@SuppressWarnings("ComplexCondition")
+fun File.toOmhFile(): OmhFile? {
+    val formattedModifiedTime = modifiedTime.toStringRfc3339()
+
+    if (mimeType == null || id == null || name == null || formattedModifiedTime == null) {
+        return null
+    }
+
+    val parentId = if (parents.isNullOrEmpty()) {
+        ""
+    } else {
+        parents[0]
+    }
+
+    return OmhFile(
+        mimeType,
+        id,
+        name,
+        formattedModifiedTime,
+        parentId
+    )
+}