load local data

src/sh/cache.sh

@@ -138,3 +138,24 @@ cache_delete_artist() {
   # Get release groups
   echo "NOT IMPLEMENTED" >/dev/stderr
 }
+
+# Check if main items are in cache
+# argument $1: type
+# argument $2: MusicBrainz ID
+in_cache() {
+  case "$1" in
+  "$TYPE_ARTIST")
+    fn="$artist_filename"
+    ;;
+  "$TYPE_RELEASEGROUP")
+    fn="$releasegroup_filename"
+    ;;
+  "$TYPE_RELEASE")
+    fn="$release_filename"
+    ;;
+  *)
+    return 1
+    ;;
+  esac
+  [ "$(__get_json "$1" "$2" "$fn")" ] && return 0 || return 1
+}