anki/generateAnkiCards.js

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// 获取 .md 文件的文件名，用来命名 .csv 文件
var title = document.title.split('/')[0].split('.')[0];

// query function for simplicity
function query(str, parentElem) {
    var par = parentElem || document;
    if (str[0] === '.') {
        return par.getElementsByClassName(str.slice(1));
    } else if (/^[a-zA-Z0-9]+$/.test(str)) {
        return par.getElementsByTagName(str);
    }
}

// 获取 .md 文件的主体
var main = query(".markdown-body")[0];
var mainHTML = main.innerHTML;
console.log("main: ", main);

// 获取卡片的正面内容
var frontHTMLs = [].map.call(query("h2", main), function(elem, index) {
    return elem.outerHTML;
});
console.log("frontHTMLs: ", frontHTMLs);

// 获取卡片的反面内容
var backHTMLs = mainHTML.split(/<h2>.*<\/h2>/g);
backHTMLs.splice(0, 1); // 去掉第一位空字符串
backHTMLs = backHTMLs.map(function(elem) {
    return elem.replace(/\s+$/, "");
}); // 去掉字符串末尾的空白字符
console.log("backHTMLs: ", backHTMLs);

// buildCSVContent 函数：格式微调
function buildCSVContent(cards) {
    var buf = "";
    cards.map(function(card) {
        // 在不影响 .csv 文件的前提下，保留 <pre> 内的缩进
        if (card.backside.indexOf('<pre>') !== -1) {
            card.backside = card.backside.replace(/<pre>(?:.|\r\n|\r|\n)*?(?=<\/pre>)/g, function(rep) {
                return rep.replace(/(?:\r\n|\r|\n)/g, '&#10;'); // html 中的换行的转义符
            });
        }

        card.backside = card.backside.replace(/(?:\r\n|\r|\n)/g, '');
        card.backside = card.backside.replace(/"/g, "'");
        buf += "\"" + card.frontside + "\",\"" + card.backside + "\"\n";
    });
    return buf;
}

// 存储卡片为 .csv 文件
if (saveAs) {
    // console.log("!!! saveAs FOUND :)");

    // frontHTMLs + backHTMLs => cards
    var cards = [];
    backHTMLs.forEach(function(backHTML, i) {
        var card = {
            frontside: frontHTMLs[i],
            backside: backHTML
        };
        cards.push(card);
    });

    var blob = new Blob([buildCSVContent(cards)], { type: "text/plain;charset=utf-8" });
    saveAs(blob, title + ".csv");
} else {
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}