#!/bin/bash

set -e

# check latest edition of gwern.net newsletter for Markdown errors, local URLs which will break when used in the email, any dead links, and view in browser for any issues:
# use: $ newsletter-lint 2016/10

NEWSLETTER="/home/gwern/wiki/newsletter/$1.md"

cloudflare-expire "$NEWSLETTER"

cd ~/wiki/
markdown-lint.sh "$NEWSLETTER" || true

## function to wrap checks and print highlighted warning if non-zero output (self-documenting):
wrap() { OUTPUT=$($1 2>&1)
         WARN="$2"
         if [ -n "$OUTPUT" ]; then
             echo -e "\e[41m$WARN\e[0m":
             echo -e "$OUTPUT";
         fi; }

λ() { grep -F -- '](/' "$NEWSLETTER"; }
wrap λ "Local link detected in newsletter (needs to be absolute full URL to avoid breaking in email)"

linkchecker --no-status --check-extern --threads=1 --timeout=20 -r1 "https://gwern.net/newsletter/$1"

set -x
CHECK=$(echo "https://gwern.net/newsletter/$1" | xargs urlencode)
$WWW_BROWSER "https://validator.w3.org/nu/?doc=$CHECK"

TARGET="$(mktemp --suffix=.html)"
pandoc --metadata lang=en --metadata title="$1" --standalone -f markdown+smart --reference-links --css=https://gwern.net/static/css/default.css "$NEWSLETTER" > "$TARGET"
$WWW_BROWSER "$TARGET"