#!/bin/sh
set -eu

usage() {
  cat <<EOF
Missing argument <$1>.

Usage:
    pastebin.sh <FULL_TITLE> [-|FILE]

    Reads contents from [FILE], from stdin if '-' is given, and opens the
    editor on the content.

    Arguments:
      FULL_TITLE       Full title of the pastebin

Examples:
    pastebin.sh 'My example pastebin title'
    pastebin.sh 'My example pastebin title' - < file
    cat file | pastebin.sh 'My example pastebin title' -
EOF
}

FULL_TITLE="${1:-}"
[ -z "$FULL_TITLE" ] && {
  usage 'FULL_TITLE'
  exit 2
}

# Derived from:
# https://stackoverflow.com/questions/4009281/how-can-i-generate-url-slugs-in-perl/4009519#4009519
slugify() {
  echo "$1"                     | \
    tr '[:upper:]' '[:lower:]'  | \
    perl -ne 'tr/\000-\177//cd;
              s/[^\w\s-]//g;
              s/^\s+|\s+$//g;
              s/[-\s]+/-/g;
              print;'
}

SLUG_TITLE="$(slugify "$FULL_TITLE")"
PASTE_DATE="$(date -I)"
OUT="_pastebins/$PASTE_DATE-$SLUG_TITLE.md"
if [ -n "${2:-}" ]; then
  shift
  CONTENT=$(cat "$@")
else
  CONTENT='FIXME'
fi

cd ~/dev/libre/website > /dev/null

[ -f "$OUT" ] && {
  echo "Pastebin named $OUT already exists."
  exit 1
}

cat <<EOF | vipe | sponge > "$OUT"
---

title: ${FULL_TITLE}

date: ${PASTE_DATE}

layout: post

lang: en

ref: $SLUG_TITLE

---

\`\`\`FIXME
$CONTENT
\`\`\`
EOF

git reset .
git add "$OUT"
git commit -m "$0: Auto-add $OUT"
make publish
open "https://euandre.org/pastebin/$(echo "$PASTE_DATE" | tr '-' '/')/$SLUG_TITLE.html"
cd - > /dev/null