add caches

ratings/src/commonMain/kotlin/repo/CachedRatingsRepo.kt

@@ -0,0 +1,61 @@
+package dev.inmo.plaguposter.ratings.repo
+
+import dev.inmo.micro_utils.pagination.utils.doForAllWithNextPaging
+import dev.inmo.micro_utils.repos.KeyValueRepo
+import dev.inmo.micro_utils.repos.cache.cache.FullKVCache
+import dev.inmo.micro_utils.repos.cache.full.FullKeyValueCacheRepo
+import dev.inmo.plaguposter.posts.models.PostId
+import dev.inmo.plaguposter.ratings.models.Rating
+import kotlinx.coroutines.CoroutineScope
+
+class CachedRatingsRepo(
+    private val base: RatingsRepo,
+    private val scope: CoroutineScope,
+    private val kvCache: FullKVCache<PostId, Rating> = FullKVCache()
+) : RatingsRepo, KeyValueRepo<PostId, Rating> by FullKeyValueCacheRepo(base, kvCache, scope) {
+    override suspend fun getPosts(
+        range: ClosedRange<Rating>,
+        reversed: Boolean,
+        count: Int?,
+        exclude: List<PostId>
+    ): Map<PostId, Rating> {
+        val result = mutableMapOf<PostId, Rating>()
+
+        doForAllWithNextPaging {
+            kvCache.keys(it).also {
+                it.results.forEach {
+                    val rating = kvCache.get(it) ?: return@forEach
+                    if (it !in exclude && rating in range) {
+                        result[it] = rating
+                    }
+                }
+            }
+        }
+
+        return result.toMap()
+    }
+
+    override suspend fun getPostsWithRatingGreaterEq(
+        then: Rating,
+        reversed: Boolean,
+        count: Int?,
+        exclude: List<PostId>
+    ): Map<PostId, Rating> = getPosts(
+        then .. Rating(Double.MAX_VALUE),
+        reversed,
+        count,
+        exclude
+    )
+
+    override suspend fun getPostsWithRatingLessEq(
+        then: Rating,
+        reversed: Boolean,
+        count: Int?,
+        exclude: List<PostId>
+    ): Map<PostId, Rating> = getPosts(
+        Rating(Double.MIN_VALUE) .. then,
+        reversed,
+        count,
+        exclude
+    )
+}