I try to rebuild missing .part rar files

For example I have these files

in the rain.part01.rev
in the rain.part02.rar
in the rain.part02.rev
in the rain.part03.rar
...

you can see that part01.rar is missing, so I need

1. rebuild part01.rar
2. check and repair corrupted files

I try with this bash script but doesn’t work

#!/bin/bash

echo “Starting script…”

# Loop over all .rar files in the current directory
for file in *part*1.rar *part*01.rar
do
    echo "Processing file $file..."

    # Extract the part number from the file name
    part_number=$(echo $file | cut -d '.' -f 2)

    # Remove all occurrences of "part" from the part number
    part_number=${part_number//part/}

    # If the part number is 1 or 01, run rar with the r command on the file
    if [ "$part_number" == "1" ] || [ "$part_number" == "01" ]; then
        echo "Reconstructing archive $file"
        rar r $file
    fi
done

echo "Script finished."