Use different file stores based on config

modules/common/src/main/scala/docspell/common/FileStoreConfig.scala

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2020 Eike K. & Contributors
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package docspell.common
+
+import fs2.io.file.Path
+
+sealed trait FileStoreConfig {
+  def enabled: Boolean
+  def storeType: FileStoreType
+}
+object FileStoreConfig {
+  case class DefaultDatabase(enabled: Boolean) extends FileStoreConfig {
+    val storeType = FileStoreType.DefaultDatabase
+  }
+
+  case class FileSystem(
+      enabled: Boolean,
+      directory: Path
+  ) extends FileStoreConfig {
+    val storeType = FileStoreType.FileSystem
+  }
+
+  case class S3(
+      enabled: Boolean,
+      endpoint: String,
+      accessKey: String,
+      secretKey: String,
+      bucket: String
+  ) extends FileStoreConfig {
+    val storeType = FileStoreType.S3
+  }
+}

modules/common/src/main/scala/docspell/common/FileStoreType.scala

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2020 Eike K. & Contributors
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package docspell.common
+
+import cats.data.NonEmptyList
+
+sealed trait FileStoreType { self: Product =>
+  def name: String =
+    productPrefix.toLowerCase
+}
+object FileStoreType {
+  case object DefaultDatabase extends FileStoreType
+
+  case object S3 extends FileStoreType
+
+  case object FileSystem extends FileStoreType
+
+  val all: NonEmptyList[FileStoreType] =
+    NonEmptyList.of(DefaultDatabase, S3, FileSystem)
+
+  def fromString(str: String): Either[String, FileStoreType] =
+    all
+      .find(_.name.equalsIgnoreCase(str))
+      .toRight(s"Invalid file store type: $str")
+
+  def unsafeFromString(str: String): FileStoreType =
+    fromString(str).fold(sys.error, identity)
+}