Download: Add Disabled, Originals, MediaRaw & MediaSidecar Flags #2234

Extends DownloadSettings with 4 additional options:
- Name: File name pattern for downloaded files (existed)
- Disabled: Disables downloads
- Originals: Only download files stored in "originals" folder
- MediaRaw: Include RAW image files
- MediaSidecar: Include metadata sidecar files (JSON, XMP, YAML)

internal/entity/entity_const.go

@@ -0,0 +1,71 @@
+package entity
+
+import (
+	"github.com/photoprism/photoprism/pkg/media"
+)
+
+// Default values.
+const (
+	Unknown      = ""
+	UnknownYear  = -1
+	UnknownMonth = -1
+	UnknownDay   = -1
+	UnknownName  = "Unknown"
+	UnknownTitle = UnknownName
+	UnknownID    = "zz"
+)
+
+// Media content types.
+const (
+	MediaUnknown  = ""
+	MediaImage    = string(media.Image)
+	MediaVector   = string(media.Vector)
+	MediaAnimated = string(media.Animated)
+	MediaLive     = string(media.Live)
+	MediaVideo    = string(media.Video)
+	MediaRaw      = string(media.Raw)
+	MediaText     = string(media.Text)
+)
+
+// Storage root folders.
+const (
+	RootUnknown   = ""
+	RootOriginals = "/"
+	RootExamples  = "examples"
+	RootSidecar   = "sidecar"
+	RootImport    = "import"
+	RootPath      = "/"
+)
+
+// Event type.
+const (
+	Created = "created"
+	Updated = "updated"
+	Deleted = "deleted"
+)
+
+// Photo stack states.
+const (
+	IsStacked   int8 = 1
+	IsStackable int8 = 0
+	IsUnstacked int8 = -1
+)
+
+// Sort options.
+const (
+	SortOrderDefault   = ""
+	SortOrderRelevance = "relevance"
+	SortOrderCount     = "count"
+	SortOrderAdded     = "added"
+	SortOrderImported  = "imported"
+	SortOrderEdited    = "edited"
+	SortOrderNewest    = "newest"
+	SortOrderOldest    = "oldest"
+	SortOrderPlace     = "place"
+	SortOrderMoment    = "moment"
+	SortOrderName      = "name"
+	SortOrderPath      = "path"
+	SortOrderSlug      = "slug"
+	SortOrderCategory  = "category"
+	SortOrderSimilar   = "similar"
+)