feat(thumb): generate and return sidecar thumb

models/defaults.go

@@ -112,6 +112,8 @@ Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; verti
 	{Name: "thumb_ffmpeg_enabled", Value: "0", Type: "thumb"},
 	{Name: "thumb_vips_path", Value: "vips", Type: "thumb"},
 	{Name: "thumb_ffmpeg_path", Value: "ffmpeg", Type: "thumb"},
+	{Name: "thumb_proxy_enabled", Value: "0", Type: "thumb"},
+	{Name: "thumb_proxy_policy", Value: "[]", Type: "thumb"},
 	{Name: "pwa_small_icon", Value: "/static/img/favicon.ico", Type: "pwa"},
 	{Name: "pwa_medium_icon", Value: "/static/img/logo192.png", Type: "pwa"},
 	{Name: "pwa_large_icon", Value: "/static/img/logo512.png", Type: "pwa"},

models/file.go

@@ -466,3 +466,8 @@ func (file *File) GetPosition() string {
 func (file *File) ShouldLoadThumb() bool {
 	return file.MetadataSerialized[ThumbStatusMetadataKey] != ThumbStatusNotAvailable
 }
+
+// return sidecar thumb file name
+func (file *File) ThumbFile() string {
+	return file.SourceName + GetSettingByNameWithDefault("thumb_file_suffix", "._thumb")
+}

models/policy.go

@@ -4,6 +4,7 @@ import (
 	"encoding/gob"
 	"encoding/json"
 	"github.com/gofrs/uuid"
+	"github.com/samber/lo"
 	"path"
 	"path/filepath"
 	"strconv"
@@ -227,3 +228,14 @@ func (policy *Policy) UpdateAccessKeyAndClearCache(s string) error {
 func (policy *Policy) ClearCache() {
 	cache.Deletes([]string{strconv.FormatUint(uint64(policy.ID), 10)}, "policy_")
 }
+
+// CouldProxyThumb return if proxy thumbs is allowed for this policy.
+func (policy *Policy) CouldProxyThumb() bool {
+	if policy.Type == "local" || !IsTrueVal(GetSettingByName("thumb_proxy_enabled")) {
+		return false
+	}
+
+	allowed := make([]uint, 0)
+	_ = json.Unmarshal([]byte(GetSettingByName("thumb_proxy_policy")), &allowed)
+	return lo.Contains[uint](allowed, policy.ID)
+}