Delete user downloads that are older than 28 days (macOS)

clean_downloads.sh

#!/bin/bash

sudo -u $(stat -f "%Su" /dev/console) /bin/bash <<'END'

# Move files to user's trash
function trash() {
 if [[ $# ]]; then
  a=()
  for f in "$@"; do a+=("$(realpath "$f")"); done
  f=$(printf "\",POSIX file \"%s" "${a[@]}")\"
  osascript -ss -e"tell app \"Finder\" to delete {${f:2}}" 1>/dev/null
 fi
}

files=()

# List all files
while IFS= read -r -d '' file; do files+=("$file"); done < <(find ~/"Downloads/"* -mtime +28 -print0)

# Delete files in chunks to avoid timeouts
k=64;
for ((i = 0; i < ${#files[@]}; i += k))
do
  trash "${files[@]:i:k}"
done