Server fetches and saves files. Also proper error handling

src/main/scala/fetch/Main.scala

@@ -0,0 +1,27 @@
+package fetch
+
+import cats.effect.IO
+import cats.effect.unsafe.implicits.global
+import cats.implicits.toTraverseOps
+import db.DBService
+
+import java.time.{LocalDate, LocalDateTime}
+
+object Main {
+  def run: IO[Unit] = {
+    val from = LocalDateTime.of(2023, 4, 23, 20, 0)
+    val to = LocalDateTime.of(2023, 4, 23, 23, 30)
+    for {
+      fetched <- FetchService.fetchInRange(from, to)
+//      fetched <- FetchService.fetchFromDate(LocalDate.of(2023, 4, 23))
+      (errors, successfulDownloads) = fetched.partitionMap(identity)
+      _ <- IO.println(s"Fetch errors: $errors")
+      saveResults <- successfulDownloads.traverse { case (name, content) => DBService.save(name, content) }
+      _ <- IO.println(s"Save results: $saveResults")
+    } yield ()
+  }
+
+  def main(args: Array[String]): Unit = {
+    run.unsafeRunSync()
+  }
+}