#!/usr/bin/env bash
#
# Purge BunnyCDN edge cache for the index files of one ARCH+OS_ID
# combination across one or more domains.
#
# Usage:
#   purge_cdn_cache.sh <BUNNYNET_API_KEY> <ARCH> <OS_ID> <domain> [<domain>...]
#
set -euo pipefail

if (( $# < 4 )); then
  echo "usage: $0 <api_key> <arch> <os_id> <domain> [<domain>...]" >&2
  exit 2
fi

api_key="$1"
arch="$2"
os_id="$3"
shift 3

resources=(
  "src/contrib/PACKAGES"
  "src/contrib/PACKAGES.gz"
  "src/contrib/PACKAGES.rds"
  "src/contrib/PACKAGES.db"
  "src/contrib/Meta/archive.rds"
)

purge_one() {
  local target="$1"
  # --data-urlencode encodes value of `url=` for us; -G forces GET.
  curl -sS -G -X POST \
    -H "AccessKey: ${api_key}" \
    --data-urlencode "url=${target}" \
    --data "async=false" \
    "https://api.bunny.net/purge"
  echo
}

for domain in "$@"; do
  for resource in "${resources[@]}"; do
    purge_one "https://${domain}/${arch}/${os_id}/latest/${resource}"
  done
done