newCashBook/epub_node/router/epub/style.js

import logger from "#logger";
import { files_insert, files_insert_link_epub } from "#db";
import { dirExists } from "#utils";
import fs from "node:fs";
import { calculateMD5 } from "./image.js";

// ./base_files/5ae2d9158081faab184484ed1783e176
export async function saveAllCSS(epub, uploadPath, book_id, author_id) {
  dirExists(uploadPath);
  dirExists(`${uploadPath}style/`);

  // 获取原始数据源
  const getAllCss = epub.zip.names.filter((elm) => elm.indexOf("css") > -1);
  const base_path = `${uploadPath}epub-extract/`;
  if (getAllCss.length) {
    const cssRes = await Promise.allSettled(
      getAllCss.map((img) => {
        return fs.readFileSync(base_path + img, "utf8");
      })
    );
    const allCss_fulfilled = cssRes
      .map((img, index) => {
        const img_fulfilled = cssRes[index];
        const cssPath = getAllCss[index];
        if (img_fulfilled.status === "fulfilled") {
          // const file_md5 = await calculateMD5(base_path + cssPath)
          return {
            ...img,
            ...img_fulfilled,
            index,
            path: base_path + cssPath,
            cssPath, // md5: file_md5,
            css_data: img_fulfilled.value,
            mimeType: "text/css",
          };
        }
        return false;
      })
      .filter((elm) => elm);

    await Promise.allSettled(
      allCss_fulfilled.map(async (elm) => {
        const md5 = await calculateMD5(elm.path);
        const [elmPath, elmName] = `${elm.path}`.match(/.*\/(.*\.css)/);

        //
        // 移动文件
        // './base_files/5ae2d9158081faab184484ed1783e176/epub-extract/OEBPS/flow0001.css'
        // ./base_files/5ae2d9158081faab184484ed1783e176/style/flow0001.css
        //

        fs.writeFile(`${uploadPath}style/${md5}.css`, elm.css_data, (err) => {
          if (err) {
            logger.error("Error writing Img file:", err);
          } else {
            logger.info("Img data saved to " + md5);
          }
        });

        const params = {
          file_id: md5,
          md5: md5,
          mimetype: elm.mimeType,
          size: elm.css_data.length,
          name: elmName,
          path: `${uploadPath}style/${md5}.css`,
          source_id: md5,
        };
        await files_insert(params);
        return await files_insert_link_epub({
          file_id: md5,
          book_id,
          author_id,
        });
      })
    );
  }
}