feat(qndl-artist): add apply subcommand (relocate + album_artist tag)

2 files changed, 52 insertions, 0 deletions

diff --git a/ar/.local/bin/qndl-artist b/ar/.local/bin/qndl-artist
index d442c56..c79a966 100755
--- a/ar/.local/bin/qndl-artist
+++ b/ar/.local/bin/qndl-artist
@@ -20,9 +20,44 @@ cmd_normalize() {
   printf '%s\n' "$_name"
 }
 
+# mp3 1개를 표준 폴더로 이동(필요시) + album_artist 설정.
+cmd_apply() {
+  _fp="$1"; _canon="$2"
+  [ -f "$_fp" ] || { printf 'apply: no such file: %s\n' "$_fp" >&2; return 1; }
+  case "$_fp" in
+  "$MUSIC"/*) : ;;
+  *) printf 'apply: not under %s: %s\n' "$MUSIC" "$_fp" >&2; return 1 ;;
+  esac
+  _rel="${_fp#"$MUSIC"/}"
+  _artist_seg="${_rel%%/*}"
+  _subpath="${_rel#*/}"          # album/.../title.mp3
+  if [ "$_artist_seg" != "$_canon" ]; then
+    _destdir="$MUSIC/$_canon/$(dirname "$_subpath")"
+    _dest="$_destdir/$(basename "$_fp")"
+    if [ -e "$_dest" ]; then
+      printf 'apply: skip (exists): %s\n' "$_dest" >&2
+      return 0
+    fi
+    mkdir -p "$_destdir"
+    mv "$_fp" "$_dest" || return 1
+    # 빈 원본 앨범/아티스트 폴더 정리
+    rmdir -p "$MUSIC/$_artist_seg/$(dirname "$_subpath")" 2>/dev/null || true
+    _fp="$_dest"
+  fi
+  _tmp="$(dirname "$_fp")/.qndl-tag-$$.mp3"
+  if ffmpeg -v error -y -i "$_fp" -map 0 -c copy -metadata album_artist="$_canon" "$_tmp" 2>/dev/null; then
+    mv "$_tmp" "$_fp"
+  else
+    rm -f "$_tmp"
+    printf 'apply: tag failed: %s\n' "$_fp" >&2
+    return 1
+  fi
+}
+
 _sub="${1:-}"
 [ $# -gt 0 ] && shift
 case "$_sub" in
 normalize) cmd_normalize "$@" ;;
+apply) cmd_apply "$@" ;;
 *) printf 'usage: qndl-artist {normalize|apply|apply-download|merge} ...\n' >&2; exit 2 ;;
 esac
diff --git a/ar/.local/bin/tests/test-qndl-artist.sh b/ar/.local/bin/tests/test-qndl-artist.sh
index ea5a03a..cd83568 100644
--- a/ar/.local/bin/tests/test-qndl-artist.sh
+++ b/ar/.local/bin/tests/test-qndl-artist.sh
@@ -7,6 +7,10 @@ pass() { printf 'ok   - %s\n' "$1"; }
 fail() { printf 'FAIL - %s\n     expected: [%s]\n     actual:   [%s]\n' "$1" "$2" "$3"; FAIL=1; }
 eq() { if [ "$2" = "$3" ]; then pass "$1"; else fail "$1" "$2" "$3"; fi }
 
+# 1초 무음 mp3 생성 (실제 파일이어야 ffmpeg 재태그 가능)
+mkmp3() { mkdir -p "$(dirname "$1")"; ffmpeg -v error -y -f lavfi -i anullsrc=r=44100:cl=mono -t 1 -q:a 9 "$1"; }
+tag_of() { ffprobe -v error -show_entries format_tags="$2" -of default=noprint_wrappers=1:nokey=1 "$1"; }
+
 # --- fixtures ---
 TMP="$(mktemp -d)"
 trap 'rm -rf "$TMP"' EXIT
@@ -22,4 +26,17 @@ eq "normalize: case fallback"  "Epik High" "$("$BIN" normalize 'EPIK HIGH')"
 eq "normalize: unknown as-is"  "NewArtist" "$("$BIN" normalize 'NewArtist')"
 eq "normalize: map beats folder" "Bar" "$("$BIN" normalize 'Foo')"
 
+# --- apply ---
+mkmp3 "$XDG_MUSIC_DIR/4MEN/Album1/song.mp3"
+"$BIN" apply "$XDG_MUSIC_DIR/4MEN/Album1/song.mp3" "4Men"
+eq "apply: moved to canonical dir" "yes" "$([ -f "$XDG_MUSIC_DIR/4Men/Album1/song.mp3" ] && echo yes || echo no)"
+eq "apply: source pruned"          "no"  "$([ -d "$XDG_MUSIC_DIR/4MEN" ] && echo yes || echo no)"
+eq "apply: album_artist set"       "4Men" "$(tag_of "$XDG_MUSIC_DIR/4Men/Album1/song.mp3" album_artist)"
+
+# 대상에 동일 파일명 존재 → 이동 건너뜀
+mkmp3 "$XDG_MUSIC_DIR/DUPE/Al/x.mp3"
+mkmp3 "$XDG_MUSIC_DIR/Dupe/Al/x.mp3"
+"$BIN" apply "$XDG_MUSIC_DIR/DUPE/Al/x.mp3" "Dupe" 2>/dev/null
+eq "apply: conflict keeps source" "yes" "$([ -f "$XDG_MUSIC_DIR/DUPE/Al/x.mp3" ] && echo yes || echo no)"
+
 exit $FAIL