convert a google doc to HTML

gdocToHtml.js

function ConvertGoogleDocToCleanHtml() {
    var body = DocumentApp.getActiveDocument().getBody();
    var numChildren = body.getNumChildren();
    var output = [];
    var images = [];
    var listCounters = {};

    // Walk through all the child elements of the body.
    for (var i = 0; i < numChildren; i++) {
        var child = body.getChild(i);

        output.push( processItem(child, listCounters, images).replace('<li><p>', '<li>').replace('</p></li>', '</li>') );
    }


    var html = output.join('\r');
    emailHtml(html, images);
    //createDocumentForHtml(html, images);
}

function emailHtml(html, images) {
    var attachments = [];
    var j;

    for (j = 0; j<images.length; j++) {
        attachments.push( {
            "fileName": images[j].name,
            "mimeType": images[j].type,
            "content": images[j].blob.getBytes()
        } );
    }

    var inlineImages = {};
    for (j = 0; j<images.length; j++) {
        inlineImages[[images[j].name]] = images[j].blob;
    }

    var name = DocumentApp.getActiveDocument().getName()+".html";
    attachments.push({"fileName":name, "mimeType": "text/html", "content": html});
    MailApp.sendEmail({
        to: Session.getActiveUser().getEmail(),
        subject: name,
        htmlBody: html,
        inlineImages: inlineImages,
        attachments: attachments
    });
}

function createDocumentForHtml(html, images) {
    var name = DocumentApp.getActiveDocument().getName()+".html";
    var newDoc = DocumentApp.create(name);
    newDoc.getBody().setText(html);
    for(var j=0; j < images.length; j++)
    newDoc.getBody().appendImage(images[j].blob);
    newDoc.saveAndClose();
}

function dumpAttributes(atts) {
    // Log the paragraph attributes.
    for (var att in atts) {
        Logger.log(att + ":" + atts[att]);
    }
}

function processItem(item, listCounters, images) {
    var output = [];
    var prefix = "", suffix = "";



    if (item.getType() == DocumentApp.ElementType.PARAGRAPH) {

        if (item.getNumChildren() === 0) {
            return "";
        }

        var isHeading =  item.getHeading();

        if (isHeading == DocumentApp.ParagraphHeading.HEADING6) {
            prefix = "<h6>";
            suffix = "</h6>";
        }
        else if (isHeading == DocumentApp.ParagraphHeading.HEADING5) {
            prefix = "<h5>";
            suffix = "</h5>";
        }
        else if (isHeading == DocumentApp.ParagraphHeading.HEADING4) {
            prefix = "<h4>";
            suffix = "</h4>";
        }
        else if (isHeading == DocumentApp.ParagraphHeading.HEADING3) {
            prefix = "<h3>";
            suffix = "</h3>";
        }
        else if (isHeading == DocumentApp.ParagraphHeading.HEADING2) {
            prefix = "<h2>";
            suffix = "</h2>";
        }
        else if (isHeading == DocumentApp.ParagraphHeading.HEADING1) {
            prefix = "<h1>";
            suffix = "</h1>";
        }
    }

    if (item.getType() == DocumentApp.ElementType.INLINE_IMAGE) {
        processImage(item, images, output);
    }

    if (item.getType() === DocumentApp.ElementType.LIST_ITEM) {
        var listItem = item;
        var gt = listItem.getGlyphType();
        var key = listItem.getListId() + '.' + listItem.getNestingLevel();
        var counter = listCounters[key] || 0;

        // First list item
        if ( counter === 0 ) {
            if (gt === DocumentApp.GlyphType.BULLET || gt === DocumentApp.GlyphType.HOLLOW_BULLET || gt === DocumentApp.GlyphType.SQUARE_BULLET) {
                prefix = '[ul]\n<li>';
                suffix = "</li>";
            }
            else {
                prefix = "<ol>\n<li>";
                suffix = "</li>";
            }
        }
        else {
            prefix = "<li>";
            suffix = "</li>";
        }

        if (item.isAtDocumentEnd() || (item.getNextSibling() && (item.getNextSibling().getType() != DocumentApp.ElementType.LIST_ITEM))) {
            if (gt === DocumentApp.GlyphType.BULLET || gt === DocumentApp.GlyphType.HOLLOW_BULLET || gt === DocumentApp.GlyphType.SQUARE_BULLET) {
                suffix += "\n[/ul]";
            }
            else {
                suffix += "\n</ol>";
            }

        }

        counter++;
        listCounters[key] = counter;
    }

    if (item.getType() == DocumentApp.ElementType.TEXT) {
        var text = item.getText();
        if (text.indexOf('[h6]') === 0) {
            prefix = "<h6>";
            suffix = "</h6>";
        }
        else if (text.indexOf('[h5]') === 0) {
            prefix = "<h5>";
            suffix = "</h5>";
        }
        else if (text.indexOf('[h4]') === 0) {
            prefix = "<h4>";
            suffix = "</h4>";
        }
        else if (text.indexOf('[h3]') === 0) {
            prefix = "<h3>";
            suffix = "</h3>";
        }
        else if (text.indexOf('[h2]') === 0) {
            prefix = "<h2>";
            suffix = "</h2>";
        }
        else if (text.indexOf('[h1]') === 0) {
            prefix = "<h1>";
            suffix = "</h1>";
        } else {
            prefix = "<p>";
            suffix = "</p>";
        }
    }

    output.push(prefix);

    if (item.getType() == DocumentApp.ElementType.TEXT) {
        processText(item, output, prefix);
    }
    if (item.getNumChildren) {
        var numChildren = item.getNumChildren();

        // Walk through all the child elements of the doc.
        for (var i = 0; i < numChildren; i++) {
            var child = item.getChild(i);
            output.push(processItem(child, listCounters, images));
        }
    }

    output.push(suffix);
    return output.join('');
}


function processText(item, output) {
    var text = item.getText();

    text = text.replace(/\[h\d\]/, '').trim();

    output.push(text);
}

function processImage(item, images, output) {

    images = images || [];
    var blob = item.getBlob();
    var contentType = blob.getContentType();
    //var extension = "";
    var extension = contentType.split('.').pop();
    //
    // if (/\/png$/.test(contentType)) {
    //     extension = ".png";
    // } else if (/\/gif$/.test(contentType)) {
    //     extension = ".gif";
    // } else if (/\/jpe?g$/.test(contentType)) {
    //     extension = ".jpg";
    // } else {
    //     throw "Unsupported image type: " + contentType;
    // }

    var imagePrefix = "Image_";
    var imageCounter = images.length;
    var name = imagePrefix + imageCounter + extension;
    imageCounter++;

    output.push('<img src="cid:' + name + '" />');
    images.push( {
        "blob": blob,
        "type": contentType,
        "name": name
    } );
}