From d82c93fef0fc0bb937220334f73c264fbb1082f2 Mon Sep 17 00:00:00 2001
From: kseniya <ktomskih@datamonsters.co>
Date: Wed, 20 Sep 2017 17:58:19 +0700
Subject: Common code for synchronizers

---
 .../synchronization/utils/package.scala            | 64 ++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 src/main/scala/xyz/driver/pdsuicommon/synchronization/utils/package.scala

(limited to 'src/main/scala/xyz/driver/pdsuicommon/synchronization/utils/package.scala')

diff --git a/src/main/scala/xyz/driver/pdsuicommon/synchronization/utils/package.scala b/src/main/scala/xyz/driver/pdsuicommon/synchronization/utils/package.scala
new file mode 100644
index 0000000..1b30158
--- /dev/null
+++ b/src/main/scala/xyz/driver/pdsuicommon/synchronization/utils/package.scala
@@ -0,0 +1,64 @@
+package xyz.driver.pdsuicommon.synchronization
+
+import java.net.URL
+import java.nio.ByteBuffer
+import java.util.UUID
+
+import xyz.driver.pdsuicommon.domain.{LongId, UuidId}
+import xyz.driver.pdsuicommon.http.HttpFetcher
+import xyz.driver.pdsuicommon.json.JsonSerializer
+import xyz.driver.pdsuicommon.synchronization.domain.FakeId
+
+import scala.collection.breakOut
+import scala.concurrent.{ExecutionContext, Future}
+import scala.io.Codec
+
+package object utils {
+
+  type FakeIdMap[T] = Map[FakeId, T]
+
+  object FakeIdMap {
+
+    def empty[T]: FakeIdMap[T] = Map.empty
+
+    def create[T](xs: Seq[T])(implicit fakeIdExtractor: FakeIdGen[T]): FakeIdMap[T] = {
+      xs.map({ x =>
+        fakeIdExtractor.getFor(x) -> x
+      })(breakOut)
+    }
+
+  }
+
+  /**
+    * Requests domain objects from the repository using
+    * ids of fetched dictionary entities
+    *
+    * @param getList repository access function
+    * @param xs sequence of entity objects
+    * @param id function that extracts id from the entity
+    * @tparam Id Type of Id (for example [[LongId]], [[UuidId]])
+    * @tparam K Type parameter for Id
+    * @tparam D Domain object type name
+    * @tparam E Dictionary entity object type name
+    */
+  def domainFromEntities[K, D, E, Id[_]](getList: Set[Id[K]] => Seq[D], xs: Seq[E])(id: E => Id[K]): Seq[D] = {
+    getList(xs.map(x => id(x)).toSet)
+  }
+
+  /** Version of [[domainFromEntities]] for LongId */
+  def domainFromEntitiesLong[K, D, E](getList: Set[LongId[K]] => Seq[D], xs: Seq[E])(id: E => Long): Seq[D] = {
+    domainFromEntities(getList, xs)(e => LongId(id(e)))
+  }
+
+  /** Version of [[domainFromEntities]] for UuidId */
+  def domainFromEntitiesUUID[K, D, E](getList: Set[UuidId[K]] => Seq[D], xs: Seq[E])(id: E => UUID): Seq[D] = {
+    domainFromEntities(getList, xs)(e => UuidId(id(e)))
+  }
+
+  def fetch[T](httpFetcher: HttpFetcher, url: URL)(implicit m: Manifest[T], ec: ExecutionContext): Future[T] = {
+    httpFetcher(url).map { rawContent =>
+      val content = Codec.UTF8.decoder.decode(ByteBuffer.wrap(rawContent)).toString
+      JsonSerializer.deserialize[T](content)
+    }
+  }
+}
-- 
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