#!/usr/bin/env nix-shell
#!nix-shell -i bash -p jq curl

set -e

prefix() {
    declare token="${1}"
    while read line; do
        echo "${token}${line}"
    done
}

urlnormalize() {
    # Strip scheme and trailing slash
    sed -e 's|^\w*://||g' | sed -e 's|/$||g'
}

urlencode() {
    curl -s -w "%{url_effective}" --get --data-urlencode "@-" "example.com" | cut -d '?' -f2-
}

render() {
    declare line=$1

    declare url=$(echo $line | jq -j -r .href);
    declare title=$(echo $line | jq -j -r .description);
    declare description=$(echo $line | jq -j -r .extended);
    declare timestamp=$(echo $line | jq -j -r .time);
    declare tags=$(echo $line | jq -j -r .tags | sed 's|\s| #|g');

    echo "# $title"
    echo ""
    echo "Link: $url"
    echo "Timestamp: $timestamp"
    if [[ "$tags" ]]; then
        echo "Tags: #$tags"
    else
        "Tags: "
    fi
    echo ""
    if [[ "$description" ]]; then
        echo "## Description"
        echo "$description" | sed 's|<.\?blockquote>||g' | prefix "> "
        echo ""
    fi
}

jq -c .[] $1 | while read line; do
    declare path="$(echo $line | jq -j -r .href | urlnormalize | urlencode).md"
    if [[ -f "$path" ]]; then
        echo "Skipping: $path"
        continue
    fi

    echo "Converting: $path"
    render "$line" > $path
done