Simple scraper for the grain list found on beersmith.com

beersmith-grainlist-parser.js

// http://beersmith.com/Grains/Grains/GrainList.htm

var table = document.querySelector("#table2");

var rows = table.querySelectorAll("tr");


var result = [];
rows.forEach((row, index) => {
    if (index === 0) {
        return;
    }

    var cells = row.querySelectorAll("td");

    function formatSpecificGravity(_g) {
        return parseFloat(_g);
    }

    function parseColor(color) {
        const srm = parseInt(color);
        const ebc = Math.floor(srm * 1.97);
        const lovibond = Math.floor((srm + 0.76) / 1.3546)
    
        return srm;

        return {
            srm,
            ebc,
            lovibond
        }
    }

    function formatMaxInBatch(_p) {
        return parseInt(_p) / 100;
    }

    function parseType(textType) {
        switch(textType) {
            case "Grain": return "GRAIN";
            case "Sugar": return "SUGAR";
            case "Adjunct": return "ADJUNCT";
            case "Dry Extract": return "DRY_EXTRACT";
            case "Extract": return "EXTRACT";
        }
    }

    function parseOrigin(origin) {
        switch(origin) {
            case "Belgium": return "BE";
            case "Germany": return "DE";
            case "US": return "US";
            case "United Kingdom": return "UK";
        }
    }

    function getPotentialYield(gravity) {
        const ppg = parseInt(gravity.substring(3))
        const PPG_SUGAR = 46;

        return ppg/PPG_SUGAR;
    }

    var cellRes = {};
    cells.forEach((cell, index) => {
        switch(index) {
            case 0:
                // Name
                cellRes["name"] = cell.textContent;
                break;
            case 1:
                // Origin
                cellRes["origin"] = parseOrigin(cell.textContent);
                break;
            case 2:
                // Type
                cellRes["type"] = parseType(cell.textContent);
                break;
            case 3:
                // Color
                cellRes["color"] = parseColor(cell.textContent);
                break;
            case 4:
                // Must Mash
                cellRes["must_mash"] = cell.textContent = "Yes" ? true : false;
                break;
            case 5:
                // Potential SG
                cellRes["potential_yield"] = getPotentialYield(cell.textContent);
                break;
            case 6:
                // Max in batch
                cellRes["max_in_batch"] = formatMaxInBatch(cell.textContent);
                break;
        }
    });
    result.push(cellRes);
})


copy(result)