wpra.sh - Wikipedia REST API utility

wpra.sh

#!/usr/bin/env bash

. hhs.bash 0.2.0

function init_wpra_math ()
{
  : ${PREVIEW_METHOD:=sixel}
}

function optparse_wpra_math ()
{
  case "$1" in
    -s|--seesaawiki) #
      # For seesaawiki. Set twice for embeding raw eqn.
      nparams 0
      let OPT_SEESAAWIKI=${OPT_SEESAAWIKI:-0}+1
      ;;
    -p|--preview) # {display|sixel|xdg-open}
      # Set preview method. (default: sixel)
      nparams 1
      optset PREVIEW_METHOD "$2"
      ;;
    *) return 1 ;;
  esac
}

function wpra_math () # [<equation>]
{
  local rest_base="https://wikimedia.org/api/rest_v1/media/math"
  local rest_check="${rest_base}/check"
  local rest_render="${rest_base}/render"
  local hash
  local eqn="$1"
  local eqn_pe="$(perl -MURI::Escape -e 'print uri_escape($ARGV[0])' "$eqn")"
  local previewer
  local preview_format=svg
  read hash < <(
    wget "${rest_check}/tex" --post-data="q={\displaystyle ${eqn_pe}}" -qSO/dev/null \
    |& grep -E	"^ *x-resource-location: " \
    | awk '$0=$2'
    )
  [ "$hash" ] || {
    error "Failed to get x-resource-location: ${1}"
    exit 1
  }

  case "${OPT_PREVIEW_METHOD:-sixel}" in
  display) previewer=(display);preview_format=png;;&
  sixel)   previewer=(convert - -alpha off -negate sixel:-);;&
  xdg-open) previewer=(xdg-open);;&
  xdg-open)
    "${previewer[@]}" "${rest_render}/${preview_format}/${hash}";;
  display|sixel)
    wget -qO- "${rest_render}/${preview_format}/${hash}" | "${previewer[@]}";;
  *) error "Unknown preview method: ${OPT_PREVIEW_METHOD}"; abort;;
  esac

  case "${OPT_SEESAAWIKI:-0}" in
  0) echo      "${rest_render}/svg/${hash}";;
  1) echo "&ref(${rest_render}/svg/${hash}#.png,no_link)";;
  *) echo "&ref(${rest_render}/svg/${hash}#.png,no_link){\$${eqn}\$}";;
  esac
}

has_subcommand_wpra=1

function wpra () # <subcommand>
{
  :
}

invoke_command "$@"