From fbbdddef8c4b0e7cb5f6ac1343e818defc96d4a7 Mon Sep 17 00:00:00 2001
From: Tangem <git@tangem.com>
Date: Sun, 28 Oct 2018 21:16:10 +0300
Subject: [PATCH] Updated on 2026-08-14

---
 .../tangem/data/network/exception/Failure.kt  | 31 +++++++++++++++++
 .../presentation/viewmodel/BaseViewModel.kt   | 34 +++++++++++++++++++
 .../viewmodel/LoadedWalletViewModel.kt        | 33 ++++++++++++++++++
 3 files changed, 98 insertions(+)
 create mode 100644 app/src/main/java/com/tangem/data/network/exception/Failure.kt
 create mode 100644 app/src/main/java/com/tangem/presentation/viewmodel/BaseViewModel.kt
 create mode 100644 app/src/main/java/com/tangem/presentation/viewmodel/LoadedWalletViewModel.kt

diff --git a/app/src/main/java/com/tangem/data/network/exception/Failure.kt b/app/src/main/java/com/tangem/data/network/exception/Failure.kt
new file mode 100644
index 0000000000..f6b9deaa4c
--- /dev/null
+++ b/app/src/main/java/com/tangem/data/network/exception/Failure.kt
@@ -0,0 +1,31 @@
+/**
+
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.dmmatrix.epro.core.exception
+
+/**
+ * Base Class for handling errors/failures/exceptions.
+ * Every feature specific failure should extend [FeatureFailure] class.
+ */
+sealed class Failure {
+    class ApplicationError(val message: String) : Failure()
+    class NotFound : FeatureFailure()
+    class NetworkConnection : Failure()
+    class ServerError : Failure()
+    class Unauthorized : Failure() // 401
+
+    /** * Extend this class for feature specific failures.*/
+    abstract class FeatureFailure : Failure()
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/tangem/presentation/viewmodel/BaseViewModel.kt b/app/src/main/java/com/tangem/presentation/viewmodel/BaseViewModel.kt
new file mode 100644
index 0000000000..959bc6d6d3
--- /dev/null
+++ b/app/src/main/java/com/tangem/presentation/viewmodel/BaseViewModel.kt
@@ -0,0 +1,34 @@
+/**
+
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.tangem.presentation.viewmodel
+
+import android.arch.lifecycle.MutableLiveData
+import android.arch.lifecycle.ViewModel
+import com.dmmatrix.epro.core.exception.Failure
+
+/**
+ * Base ViewModel class with default Failure handling.
+ * @see ViewModel
+ * @see Failure
+ */
+abstract class BaseViewModel : ViewModel() {
+
+    var failure: MutableLiveData<Failure> = MutableLiveData()
+
+    protected fun handleFailure(failure: Failure) {
+        this.failure.value = failure
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/tangem/presentation/viewmodel/LoadedWalletViewModel.kt b/app/src/main/java/com/tangem/presentation/viewmodel/LoadedWalletViewModel.kt
new file mode 100644
index 0000000000..46b4defd2c
--- /dev/null
+++ b/app/src/main/java/com/tangem/presentation/viewmodel/LoadedWalletViewModel.kt
@@ -0,0 +1,33 @@
+package com.tangem.presentation.viewmodel
+
+import android.arch.lifecycle.MutableLiveData
+import com.dmmatrix.epro.core.exception.Failure
+
+class LoadedWalletViewModel : BaseViewModel() {
+
+    private val state: MutableLiveData<State> = MutableLiveData()
+
+    fun getState() = state
+
+    enum class State {
+        ServerError,
+        Failed,
+        Success
+    }
+
+    fun connectToken(data: String, data2: String) {
+
+    }
+
+    private fun handleTokensSaveFailure(failure: Failure) {
+        state.value = State.Success
+        handleFailure(failure)
+    }
+
+    private fun handleLoginFailure(failure: Failure) {
+        when (failure) {
+            is Failure.ServerError -> state.value = State.ServerError
+        }
+        handleFailure(failure)
+    }
+}
\ No newline at end of file