Backup message attachments

gistfile1.txt

#!/bin/bash
# Set destination folder (change as needed)
dest=~/dest

# Create destination folder if it doesn't exist
mkdir -p "$dest"

# Recursively find all files in ~/Messages/Attachments/
find ~/Messages/Attachments/ -type f | while IFS= read -r file; do
    base=$(basename "$file")
    target="$dest/$base"
    
    # If a file with this name already exists, append a counter before the extension
    if [ -e "$target" ]; then
        # Check if the filename has an extension
        if [[ "$base" == *.* ]]; then
            name="${base%.*}"
            ext="${base##*.}"
        else
            name="$base"
            ext=""
        fi
        counter=1
        # Loop until we find a name that doesn't exist
        while true; do
            if [ -n "$ext" ]; then
                newname="${name}_$counter.$ext"
            else
                newname="${name}_$counter"
            fi
            if [ ! -e "$dest/$newname" ]; then
                target="$dest/$newname"
                break
            fi
            counter=$((counter+1))
        done
    fi
    # Copy the file to the destination
    cp "$file" "$target"
done