Implement FlowPagingMapper (#58)

core/core-presentation/src/main/kotlin/com/maximillianleonov/cinemax/core/presentation/mapper/FlowPagingMapper.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2022 Maximillian Leonov
+ *
+ * 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.maximillianleonov.cinemax.core.presentation.mapper
+
+import androidx.paging.PagingData
+import androidx.paging.map
+import com.maximillianleonov.cinemax.core.presentation.util.MapperFactory
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+interface FlowPagingMapper {
+    fun <T : Any, R : Any> Flow<PagingData<T>>.pagingMap(): Flow<PagingData<R>>
+}
+
+class FlowPagingMapperImpl : FlowPagingMapper {
+    override fun <T : Any, R : Any> Flow<PagingData<T>>.pagingMap(): Flow<PagingData<R>> =
+        pagingMap(transform = MapperFactory.domainMapper())
+}
+
+private fun <T : Any, R : Any> Flow<PagingData<T>>.pagingMap(
+    transform: (T) -> R
+): Flow<PagingData<R>> = map { it.map(transform) }