Add RecoverableErrors

auth/domain/src/main/kotlin/me/proton/core/auth/domain/usecase/RecoverableErrors.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2021 Proton Technologies AG
+ * This file is part of Proton Technologies AG and ProtonCore.
+ *
+ * ProtonCore is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * ProtonCore is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ProtonCore.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package me.proton.core.auth.domain.usecase
+
+import me.proton.core.auth.domain.usecase.signup.PerformCreateExternalEmailUser
+import me.proton.core.auth.domain.usecase.signup.PerformCreateUser
+import me.proton.core.network.domain.ApiException
+import me.proton.core.network.domain.ApiResult
+import me.proton.core.network.domain.ResponseCodes
+
+private const val HTTP_BAD_REQUEST = 400
+private const val HTTP_CONFLICT = 409
+
+/** Error from [SetupPrimaryKeys]. */
+fun Throwable.primaryKeyExists(): Boolean {
+    val httpError = (this as? ApiException)?.error as? ApiResult.Error.Http
+    return httpError?.httpCode == HTTP_BAD_REQUEST && httpError.proton?.code == ResponseCodes.NOT_ALLOWED
+}
+
+/** Error from [PerformCreateUser] or [PerformCreateExternalEmailUser]. */
+fun Throwable.userAlreadyExists(): Boolean {
+    val httpError = (this as? ApiException)?.error as? ApiResult.Error.Http
+    return httpError?.httpCode == HTTP_CONFLICT && httpError.proton?.code == ResponseCodes.USER_CREATE_NAME_INVALID
+}