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