update shebangs and add some music scripts

private_dot_local/bin/executable_shuffle

@@ -1,15 +1,31 @@
 #!/usr/bin/env bash
 
 PLAYLIST="$1"
+COUNT="$2"
 
 set -e
 
-SONGS="$(find $HOME/Music -type f)"
-SONG_COUNT="$(echo "$SONGS" | wc -l)"
+PLAYLIST_DIR="$HOME/Music/Playlists"
+
+function rand_num() {
+  cat /dev/urandom | tr -dc '0-9' | head -c 10 | sed -e 's/^0*//'
+}
 
 function pick_song() {
-  num=$(( 1 + $RANDOM % $SONG_COUNT ))
-  echo "$SONGS" | sed "${num}q;d"
+  playlist="$1"
+
+  playlist_path="$PLAYLIST_DIR/$playlist.pls"
+  if [[ ! -f "$playlist_path" ]]
+  then
+    echo "error: playlist $playlist not found"
+    exit 1
+  fi
+
+  songs="$(cat "$playlist_path" | grep '^file' | sed -e 's|^[^=]*=\.\./||')"
+
+  num=$(( 1 + $(rand_num) % $(echo "$songs" | wc -l) ))
+  song="$(echo "$songs" | sed "${num}q;d")"
+  echo "$(dirname "$PLAYLIST_DIR")/$song"
 }
 
 function get_flags() {
@@ -24,30 +40,6 @@ function get_flags() {
   echo $genre
 }
 
-function in_playlist() {
-  flags="$1"
-  playlist="$2"
-
-  playlists="
-    ALL:(HE|ME|LE)
-    HE:HE
-    MHE:(ME|HE)
-    ME:ME
-    LME:(LE|ME)
-    LE:LE
-    LOFI:LOFI
-    LE_LOFI:(LE|LOFI)
-  "
-  query="$(echo "$playlists" | grep --ignore-case " ${playlist}:" | sed 's/^.*://')"
-  
-  if [[ "$(echo "$flags" | grep -E --no-ignore-case "$query")" != "" ]]
-  then
-    echo true
-  else
-    echo false
-  fi
-}
-
 function get_like_level() {
   flags="$1"
 
@@ -55,17 +47,18 @@ function get_like_level() {
   if [[ "$level" == "$(echo "$level" | tr -dc '0-3')" ]]
   then
     echo $level
+  else
+    echo 2 # default like level
   fi
 }
 
 function shuffle() {
   playlist="$1"
 
-  song="$(pick_song)"
+  song="$(pick_song "$playlist")"
   flags="$(get_flags "$song")"
-  in_list=$(in_playlist "$flags" "$playlist")
   like=$(get_like_level "$flags")
-  like_min=$(( 1 + $RANDOM % 3 ))
+  like_min=$(( 1 + $(rand_num) % 3 ))
 
   if [[ "$in_list" == "false" || "$like" -lt "$like_min" ]]
   then
@@ -77,5 +70,22 @@ function shuffle() {
   fi
 }
 
-echo "$(shuffle $PLAYLIST)"
+if [[ -z "$PLAYLIST" ]]
+then
+  PLAYLIST=all
+fi
 
+# pick_song "$PLAYLIST"
+
+if [[ -z "$COUNT" ]]
+then
+  echo "add one song to que from $PLAYLIST"
+  echo "$(shuffle $PLAYLIST)"
+else
+  echo "add $COUNT songs to que from $PLAYLIST"
+  for i in $(seq 1 $COUNT)
+  do
+    echo "$(shuffle $PLAYLIST)"
+    # echo $i
+  done
+fi