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#! /bin/sh
#
# usage: vcp COMMAND [COMMAND_ARGS...]
#
# To get a list of all available commands and their type, run vcp helpCommands
#

# helpCommands : TODO
_netcup_vcp_cmd_helpCommands() {
  sed -n 's/^# \([^ ]\+ : .*\)/\1/p' "$0" | sort
}


# login : TODO
_netcup_vcp_cmd_login() {
  _netcup_vcp_post Login \
      -L \
      -d username="$netcup_vcp_username" \
      -d password="$netcup_vcp_password" \
      -d doLogin=Login
}

# kvmInformation : VServerID -> TODO
_netcup_vcp_cmd_kvmInformation() {
  _netcup_vcp_post VServersKVM \
      -q page=vServerKVMGeneral \
      -q section=kvmInformation \
      -q selectedVServerId="$1"

  text=$(w3m -T text/html -dump -cols 4096 "$_netcup_vcp_content_cache")
  vsname=$(echo "$text" | sed -n 's/^vServer-Name\s*\(\S\+\).*/\1/p') \
  state=$(echo "$text" | sed -n 's/^Status\s*\(\S\+\).*/\1/p') \
  boot_device=$(echo "$text" | sed -n 's/^Startlaufwerk\s*\(\S\+\).*/\1/p') \
  attached_iso=$(echo "$text" | sed -n 's/^Momentan eingelegt:\s*\(\S\+\).*/\1/p') \
  net1_mac=$(echo "$text" | grep '^1\s' | awk '{print$2}') \
  net1_ipv4=$(echo "$text" | grep '^1\s' | awk '{print$3}') \
  net1_ipv6=$(echo "$text" | grep '^1\s' | awk '{print$4}') \
  ftp_host=$(echo "$text" | sed -n 's/^Hostname:\s*\(\S\+\).*/\1/p') \
  ftp_user=$(echo "$text" | sed -n 's/^Benutzername:\s*\(\S\+\).*/\1/p') \
  ftp_pass=$(echo "$text" | sed -n 's/^Passwort:\s*\(\S\+\).*/\1/p') \
  jq -n '{
    vsname: env.vsname,
    state: { gestartet: "online", gestoppt: "offline" }[env.state],
    boot_device: env.boot_device,
    attached_iso:
      (if env.attached_iso == "n/a" then null else env.attached_iso end),
    network: [
      { mac: env.net1_mac, ipv4: env.net1_ipv4, ipv6: env.net1_ipv6 }
    ],
    ftp: { host: env.ftp_host, pass: env.ftp_pass, user: env.ftp_user }
  }'
}

# attachCdrom : VServerID, ImageName -> TODO
_netcup_vcp_cmd_attachCdrom() {
  _netcup_vcp_post VServersKVM \
      -q page=vServerKVMCdrom \
      -q section=vServerKVMCdromFTP \
      -q selectedVServerId="$1" \
      -d attachCdrom='attach CD' \
      -d vcpLoginPassword="$netcup_vcp_password" \
      -d imageName="$2"
}

# detachCdrom : VServerID -> TODO
_netcup_vcp_cmd_detachCdrom() {
  _netcup_vcp_post VServersKVM \
      -q page=vServerKVMCdrom \
      -q section=vServerKVMCdromFTP \
      -q selectedVServerId="$1" \
      -d detachCdrom=
}

# getLogEntries : VServerID -> TODO
_netcup_vcp_cmd_getLogEntries() {
  _netcup_vcp_post VServers \
      -q page=page_log \
      -q selectedVServerId="$1" \
      -d getLogEntries=true \
      -d paging_maxResults=10 \
      -d paging_pageSelected=1
}

# controlAction : VServerID, ControlAction -> TODO
# ControlAction ∈ { STOP, REBOOT, RESET, POWEROFF, SUSPEND, SAVE, START }
_netcup_vcp_cmd_controlAction() {
  _netcup_vcp_post VServersKVM \
      -q page=vServerKVMControl \
      -q selectedVServerId="$1" \
      -q action="$2"
}

# setBootOrder : VServerID, CSV (ListOf BootDevice) -> TODO
# BootDevice ∈ { cdrom, hd, network }
_netcup_vcp_cmd_setBootOrder() {
  _netcup_vcp_post VServersKVM \
      -q page=vServerKVMGeneral \
      -q section=bootOrder \
      -q selectedVServerId="$1" \
      -d bootOrder="$2"
}

_netcup_vcp_cmd_ipv4support() {
  _netcup_vcp_post VServersKVM \
      -q page=vServerKVMGeneral \
      -q section=ipv4support \
      -q selectedVServerId="$1"
}

# listVServerIds : TODO
_netcup_vcp_cmd_listVServerIds() {
  _netcup_vcp_parse_vserver_ids
}

_netcup_vcp_parse_site_key() {
  sed -n 's/.*site_key\s*=\s*"\([0-9A-Za-z]\+\)";.*/\1/p;T;q' "$_netcup_vcp_content_cache"
}

_netcup_vcp_parse_vserver_ids() {
  sed -n 's/.*\<selectedVServerId=\([0-9]\+\).*/\1/p' "$_netcup_vcp_content_cache" \
    | sort -u
}

_netcup_vcp_content_cache=${netcup_vcp_content_cache-$HOME/tmp/netcup_vcp_content_cache}
_netcup_vcp_cookie_jar=${netcup_vcp_cookie_jar-$HOME/tmp/netcup_vcp_cookie_jar}
_netcup_vcp_secrets_file=${netcup_vcp_secrets-$HOME/.secrets/netcup_vcp}

_netcup_vcp_loadSecrets() {
  if ! test -r "$_netcup_vcp_secrets_file"; then
    echo "unable to load secrets from '$_netcup_vcp_secrets_file'" >&2
    return 1
  else
    . "$_netcup_vcp_secrets_file"
  fi
}

_netcup_vcp_post() {(
  endpoint=
  query=site_key=$(_netcup_vcp_parse_site_key)
  data=
  flags=

  while test $# -gt 0; do
    case $1 in
      -L)
        flags=${flags:+$flags }$1
        shift
        ;;
      -q)
        query=${query:+$query&}$2
        shift 2
        ;;
      -d)
        data=${data:+$data&}$2
        shift 2
        ;;
      -*)
        printf 'unknown option %q\n' "$1" >&2
        exit 1
        ;;
      *)
        if test -n "$endpoint"; then
          printf 'unexpected argument %q\n' "$1" >&2
          exit 2
        fi
        endpoint=/$1
        shift 1
        ;;
    esac
  done

  url=https://www.vservercontrolpanel.de/$endpoint?$query

  echo "$data" |
  exec curl \
      -d @- \
      -b "$_netcup_vcp_cookie_jar" \
      -c "$_netcup_vcp_cookie_jar" \
      -o "$_netcup_vcp_content_cache" \
      -sS \
      $flags \
      "$url"
)}

_netcup_vcp_main() {(
  set -efu
  _netcup_vcp_loadSecrets
  _netcup_vcp_cmd_"$@"
)}


case ${netcup_vpc_run-true} in
  true)
    _netcup_vcp_main "$@"
    ;;
esac