feat(scanner): allow disabling tags with Tags.<tag>.Ignore=true

Signed-off-by: Deluan <deluan@navidrome.org>

conf/configuration.go

@@ -140,6 +140,7 @@ type subsonicOptions struct {
 }
 
 type TagConf struct {
+	Ignore    bool     `yaml:"ignore"`
 	Aliases   []string `yaml:"aliases"`
 	Type      string   `yaml:"type"`
 	MaxLength int      `yaml:"maxLength"`

model/tag_mappings.go

@@ -1,6 +1,7 @@
 package model
 
 import (
+	"cmp"
 	"maps"
 	"regexp"
 	"slices"
@@ -186,19 +187,31 @@ func loadTagMappings() {
 
 	// Overwrite the default mappings with the ones from the config
 	for tag, cfg := range conf.Server.Tags {
-		if len(cfg.Aliases) == 0 {
+		if cfg.Ignore {
 			delete(_mappings.Main, TagName(tag))
 			delete(_mappings.Additional, TagName(tag))
 			continue
 		}
-		c := TagConf{
+		oldValue, ok := _mappings.Main[TagName(tag)]
-			Aliases:   cfg.Aliases,
+		if !ok {
-			Type:      TagType(cfg.Type),
+			oldValue = _mappings.Additional[TagName(tag)]
-			MaxLength: cfg.MaxLength,
-			Split:     cfg.Split,
-			Album:     cfg.Album,
-			SplitRx:   compileSplitRegex(TagName(tag), cfg.Split),
 		}
+		aliases := cfg.Aliases
+		if len(aliases) == 0 {
+			aliases = oldValue.Aliases
+		}
+		split := cfg.Split
+		if len(split) == 0 {
+			split = oldValue.Split
+		}
+		c := TagConf{
+			Aliases:   aliases,
+			Split:     split,
+			Type:      cmp.Or(TagType(cfg.Type), oldValue.Type),
+			MaxLength: cmp.Or(cfg.MaxLength, oldValue.MaxLength),
+			Album:     cmp.Or(cfg.Album, oldValue.Album),
+		}
+		c.SplitRx = compileSplitRegex(TagName(tag), c.Split)
 		if _, ok := _mappings.Main[TagName(tag)]; ok {
 			_mappings.Main[TagName(tag)] = c
 		} else {