#!/bin/bash

# builds a repository of scrapers
# outputs to _site with the following structure:
# index.yml
# <scraper_id>.zip
# Each zip file contains the scraper.yml file and any other files in the same directory

outdir="$1"
if [ -z "$outdir" ]; then
    outdir="_site"
fi

rm -rf "$outdir"
mkdir -p "$outdir"

buildScraper() 
{
    f=$1
    dir=$(dirname "$f")

    # get the scraper id from the filename
    scraper_id=$(basename "$f" .yml)
    versionFile=$f
    if [ "$scraper_id" == "package" ]; then
        scraper_id=$(basename "$dir")
    fi

    if [ "$dir" != "./scrapers" ]; then
        versionFile="$dir"
    fi

    echo "Processing $scraper_id"

    # create a directory for the version
    version=$(git log -n 1 --pretty=format:%h -- "$versionFile")
    updated=$(TZ=UTC0 git log -n 1 --date="format-local:%F %T" --pretty=format:%ad -- "$versionFile")
    
    # create the zip file
    # copy other files
    zipfile=$(realpath "$outdir/$scraper_id.zip")

    name=$(grep "^name:" "$f" | cut -d' ' -f2- | sed -e 's/\r//' -e 's/^"\(.*\)"$/\1/')
    ignore=$(grep "^# ignore:" "$f" | cut -c 10- | sed -e 's/\r//')
    dep=$(grep "^# requires:" "$f" | cut -c 12- | sed -e 's/\r//')

    # always ignore package file
    ignore="-x $ignore package"

    pushd "$dir" > /dev/null
    if [ "$dir" != "./scrapers" ]; then
        zip -r "$zipfile" . ${ignore} > /dev/null
    else
        zip "$zipfile" "$scraper_id.yml" > /dev/null
    fi
    popd > /dev/null

    # write to spec index
    echo "- id: $scraper_id
  name: $name
  version: $version
  date: $updated
  path: $scraper_id.zip
  sha256: $(sha256sum "$zipfile" | cut -d' ' -f1)" >> "$outdir"/index.yml

    # handle dependencies
    if [ ! -z "$dep" ]; then
        echo "  requires:" >> "$outdir"/index.yml
        for d in ${dep//,/ }; do
            echo "    - $d" >> "$outdir"/index.yml
        done
    fi

    echo "" >> "$outdir"/index.yml
}

# find all yml files in ./scrapers - these are packages individually
for f in ./scrapers/*.yml; do 
    buildScraper "$f"
done

find ./scrapers/ -mindepth 2 -name *.yml -print0 | while read -d $'\0' f; do
    buildScraper "$f"
done

# handle dependency packages
find ./scrapers/ -mindepth 2 -name package -print0 | while read -d $'\0' f; do
    buildScraper "$f"
done