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add MapDiff#reversed and MutableMap#applyDiff(MapDiff)

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This commit is contained in:
InsanusMokrassar 2023-05-05 11:58:27 +06:00
parent c9872a61b6
commit 0a8453b4d2
1 changed files with 29 additions and 8 deletions
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37
common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MapDiff.kt
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@ -75,6 +75,23 @@ fun <K, V> Map<K, V>.diff(
compareFun = createCompareFun(strictComparison)
)
/**
* Will apply [mapDiff] to [this] [MutableMap]
*/
fun <K, V> MutableMap<K, V>.applyDiff(
mapDiff: MapDiff<K, V>
) {
mapDiff.apply {
removed.keys.forEach { remove(it) }
changed.forEach { (k, oldNew) ->
put(k, oldNew.second)
}
added.forEach { (k, new) ->
put(k, new)
}
}
}
/**
* Will apply changes with [from] map into [this] one
*
@ -86,14 +103,8 @@ fun <K, V> MutableMap<K, V>.applyDiff(
from: Map<K, V>,
compareFun: (K, V, V) -> Boolean
): MapDiff<K, V> {
return diff(from, compareFun).apply {
removed.keys.forEach { remove(it) }
changed.forEach { (k, oldNew) ->
put(k, oldNew.second)
}
added.forEach { (k, new) ->
put(k, new)
}
return diff(from, compareFun).also {
applyDiff(it)
}
}
@ -112,3 +123,13 @@ fun <K, V> MutableMap<K, V>.applyDiff(
from,
compareFun = createCompareFun(strictComparison)
)
/**
* Reverse [this] [MapDiff]. Result will contain [MapDiff.added] on [MapDiff.removed] (and vice-verse), all the
* [MapDiff.changed] values will be reversed too
*/
fun <K, V> MapDiff<K, V>.reversed(): MapDiff<K, V> = MapDiff(
removed = added,
changed = changed.mapValues { (_, oldNew) -> oldNew.second to oldNew.first },
added = removed
)