@argdown/node/dist/plugins/GenerateDataUrlsPlugin.js

Async Argdown application for node.js

import { ArgdownPluginError } from "@argdown/core";
import isSvg from "is-svg";
import imageType from "image-type";
import { imageUtils } from "./utils.js";
import path from "path";
export class GenerateDataUrlsPlugin {
    name = "GenerateDataUrlsPlugin";
    runAsync = async (request, _response, _logger) => {
        if (!request.images ||
            !request.images.files ||
            !request.images.convertToDataUrls) {
            return;
        }
        for (const image of Object.values(request.images.files)) {
            if (!image ||
                typeof image !== "object" ||
                !("path" in image) ||
                !image.path) {
                return;
            }
            const imageObj = image;
            try {
                const baseDir = request.inputPath && !!path.extname(request.inputPath)
                    ? path.dirname(request.inputPath)
                    : request.inputPath || "";
                const buffer = await imageUtils.getImage(imageObj.path, baseDir);
                let mimeType = "";
                if (buffer) {
                    const bufferString = buffer.toString("utf-8");
                    if (isSvg(bufferString)) {
                        mimeType = "svg+xml";
                    }
                    else {
                        const imageTypeResult = await imageType(buffer);
                        if (imageTypeResult) {
                            mimeType = imageTypeResult.mime;
                        }
                        else {
                            throw new Error("File is not an image.");
                        }
                    }
                    const dataUrl = `data:${mimeType};base64,${buffer.toString("base64")}`;
                    imageObj.dataUrl = dataUrl;
                }
            }
            catch (err) {
                if (err instanceof Error) {
                    throw new ArgdownPluginError(this.name, "inline-image-generation-failed", `'Generating inline image of '${imageObj.path}' failed. ${err.message}`);
                }
            }
        }
    };
}
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