add missed files

Author: Oleg Smirnov

vk-sdk-core/src/main/java/com/vk/api/sdk/VKKeyValueStorage.kt

@@ -0,0 +1,74 @@
+/*******************************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 vk.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ ******************************************************************************/
+
+package com.vk.api.sdk
+
+import java.util.concurrent.ConcurrentHashMap
+
+interface VKKeyValueStorage {
+    fun put(key: String, value: String)
+    fun get(key: String): String?
+    fun remove(key: String)
+
+    fun putOrRemove(key: String, value: String?) {
+        value?.let { put(key, value) } ?: remove(key)
+    }
+}
+
+class VKCachedKeyValueStorage(private val storage: VKKeyValueStorage): VKKeyValueStorage {
+    private val cache: MutableMap<String, String> = ConcurrentHashMap()
+
+    override fun put(key: String, value: String) {
+        if (cache[key] != value) {
+            cache[key] = value
+            storage.put(key, value)
+        }
+    }
+
+    override fun get(key: String): String? {
+        val value = cache[key]
+        return if (value !== NULL_STRING) {
+            return value ?: getFromStorage(key)
+        } else null
+    }
+
+    override fun remove(key: String) {
+        if (cache[key] !== NULL_STRING) {
+            cache[key] = NULL_STRING
+            storage.remove(key)
+        }
+    }
+
+    private fun getFromStorage(key: String): String? {
+        val value = storage.get(key)
+        cache[key] = value ?: NULL_STRING
+        return value
+    }
+
+    companion object {
+        private val NULL_STRING = String()
+    }
+}
+
+fun VKKeyValueStorage.cached(): VKKeyValueStorage = VKCachedKeyValueStorage(this)

vk-sdk-core/src/main/java/com/vk/api/sdk/VKPreferencesKeyValueStorage.kt

@@ -0,0 +1,48 @@
+/*******************************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 vk.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ ******************************************************************************/
+
+package com.vk.api.sdk
+
+import android.content.Context
+import android.content.Context.MODE_PRIVATE
+
+class VKPreferencesKeyValueStorage(context: Context, prefsName: String = PREFERENCE_NAME) : VKKeyValueStorage {
+    private val prefs = context.getSharedPreferences(prefsName, MODE_PRIVATE)
+
+    override fun put(key: String, value: String) {
+        prefs.edit().putString(key, value).apply()
+    }
+
+    override fun get(key: String): String? {
+        return prefs.getString(key, null)
+    }
+
+    override fun remove(key: String) {
+        prefs.edit().remove(key).apply()
+    }
+
+    companion object {
+        private const val PREFERENCE_NAME = "com.vkontakte.android_pref_name"
+    }
+}

vk-sdk-core/src/main/java/com/vk/api/sdk/exceptions/VKInternalServerErrorException.kt

@@ -0,0 +1,30 @@
+/*******************************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 vk.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ ******************************************************************************/
+
+package com.vk.api.sdk.exceptions
+
+open class VKInternalServerErrorException(
+        httpStatus: Int,
+        detailMessage: String
+) : Exception("Server returned httpStatusCode=$httpStatus with body: $detailMessage")