generate

#!/usr/bin/env bash

TARGET=$1
SLUG=$2

usage() {
    cat << EOF

  link.bsmnt.pro — a serverless & minimalist URL shortener that doesn't try to do too much.

  Usage:
      ./generate <url to redirect> <slug>

  Example:
      ./generate https://github.com/basement-works github
      -- will redirect /github to https://github.com/basement-works

      ./generate https://github.com/basement-works/link.bsmnt.pro
      -- will redirect /<auto-generated> to https://github.com/basement-works/link.bsmnt.pro

  Notes:
      Auto-generated slug can only be used if you have openssl(1) installed on your machine.

EOF
}

check_openssl_installed() {
    if ! command -v openssl &> /dev/null; then
        echo
        echo "  In order to use auto-generated slug, you need to have openssl(1) installed on your machine."
        exit 1
    fi
}

generate_slug() {
    SLUG=$(openssl rand -hex 3)
}

slug_exists() {
    if [ -f "links/$SLUG.$FORMAT" ]; then
        echo
        echo "/$SLUG already exists. Please choose another."
        echo
        exit 1
    fi
}

create_redirect_file() {
    cat <<EOF > "links/$SLUG.$FORMAT"
---
target: $TARGET
---
EOF
}

commit_redirect() {
    git add "links/$SLUG.$FORMAT"
    git commit -m "feat: create /$SLUG" -m "url target is $TARGET" > /dev/null 2>&1
}

if [ -z "$TARGET" ]; then
    usage
    exit 1
fi

if [ -z "$SLUG" ]; then
    check_openssl_installed
    generate_slug
fi

# Ask the user for the file format
echo "Choose the file format (md/mdx):"
read -r FORMAT

if [[ "$FORMAT" != "md" && "$FORMAT" != "mdx" ]]; then
    echo "Invalid format. Please choose either 'md' or 'mdx'."
    exit 1
fi

slug_exists
create_redirect_file
commit_redirect

echo
echo " 🤘 Successfully created redirect from /$SLUG to $TARGET."