Change-Id: I737c7c0078512594a719fe3966cdd99ead39331fpull/311/head
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/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.core.database.dao
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/**
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* Performs an upsert by first attempting to insert [items] using [insertMany] with the the result
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* of the inserts returned.
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*
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* Items that were not inserted due to conflicts are then updated using [updateMany]
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*/
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suspend fun <T> upsert(
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items: List<T>,
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insertMany: suspend (List<T>) -> List<Long>,
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updateMany: suspend (List<T>) -> Unit,
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) {
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val insertResults = insertMany(items)
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val updateList = items.zip(insertResults)
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.mapNotNull { (item, insertResult) ->
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if (insertResult == -1L) item else null
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}
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if (updateList.isNotEmpty()) updateMany(updateList)
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}
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