Try streamline the different impls for MimeType

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

@@ -4,6 +4,7 @@ import docspell.common.syntax.all._
 import io.circe.{Decoder, Encoder}
 import java.nio.charset.StandardCharsets
 import java.nio.charset.Charset
+import cats.data.NonEmptyList
 
 /** A MIME Type impl with just enough features for the use here.
   */
@@ -96,18 +97,51 @@ object MimeType {
   val tiff        = image("tiff")
   val html        = text("html")
   val plain       = text("plain")
-  val eml         = MimeType("message", "rfc822", Map.empty)
+  val emls = NonEmptyList.of(
+    MimeType("message", "rfc822", Map.empty),
+    application("mbox")
+  )
 
   object PdfMatch {
     def unapply(mt: MimeType): Option[MimeType] =
       Some(mt).filter(_.matches(pdf))
   }
 
+  object TextAllMatch {
+    def unapply(mt: MimeType): Option[MimeType] =
+      Some(mt).filter(_.primary == "text")
+  }
+
   object HtmlMatch {
     def unapply(mt: MimeType): Option[MimeType] =
       Some(mt).filter(_.matches(html))
   }
 
+  object NonHtmlText {
+    def unapply(mt: MimeType): Option[MimeType] =
+      if (mt.primary == "text" && !mt.sub.contains("html")) Some(mt)
+      else None
+  }
+
+  object ZipMatch {
+    def unapply(mt: MimeType): Option[MimeType] =
+      Some(mt).filter(_.matches(zip))
+  }
+
+  /** Only jpeg, png and tiff */
+  object ImageMatch {
+    val all = Set(MimeType.jpeg, MimeType.png, MimeType.tiff)
+
+    def unapply(m: MimeType): Option[MimeType] =
+      Some(m).map(_.baseType).filter(all.contains)
+  }
+
+  object EmailMatch {
+    def unapply(mt: MimeType): Option[MimeType] =
+      if (emls.exists(mt.matches(_))) Some(mt)
+      else None
+  }
+
   implicit val jsonEncoder: Encoder[MimeType] =
     Encoder.encodeString.contramap(_.asString)
 

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

@@ -16,7 +16,7 @@ case class ProcessItemArgs(meta: ProcessMeta, files: List[File]) {
 
   def makeSubject: String =
     files.flatMap(_.name) match {
-      case Nil             => s"${meta.sourceAbbrev}: No files"
+      case Nil             => s"${meta.sourceAbbrev}: No files supplied"
       case n :: Nil        => n
       case n1 :: n2 :: Nil => s"$n1, $n2"
       case _               => s"${files.size} files from ${meta.sourceAbbrev}"