pcn-transformer.js

const fs = require("fs");
const path = require("path");

const DRY_RUN = false;

const EXTERNAL_LINE = "External Policy Admin Page";
const PCN_INFO_LINE = "Policy Change Notice Information";
const NEXT_PAGE_LINE = "And Goto Next Page";

/**
 * @param {string} filePath
 */
function updateFeatureFile(filePath) {
  fs.readFile(filePath, "utf8", (err, data) => {
    console.log(`==> Processing file: ${filePath}`);
    if (err) {
      console.error("==> Error reading file: ", err);
      return;
    }

    const lines = data.split("\r\n");

    let pcnUpToDate = false;
    let lastExternalLine = 0;
    for (let i = 0; i < lines.length; i++) {
      const line = lines[i];
      if (line.includes(EXTERNAL_LINE)) {
        lastExternalLine = i;
        if (lines[lastExternalLine + 2].includes(PCN_INFO_LINE)) {
          pcnUpToDate = true;
          break;
        }
      }
      if (line.includes(PCN_INFO_LINE)) {
        const deletedLines = lines.splice(i, 2);

        const nextNumberedLine = lines[lastExternalLine + 1];
        if (nextNumberedLine.includes("Next") && nextNumberedLine.includes("Pages")) {
          deletedLines[1] = nextNumberedLine;
          lines.splice(lastExternalLine + 1, 1, NEXT_PAGE_LINE, ...deletedLines);
        } else {
          lines.splice(lastExternalLine + 2, 0, ...deletedLines);
        }
      }
    }

    if (pcnUpToDate) {
      console.log("==> Up to date, skipping: ", filePath);
      return;
    }

    const updatedFile = lines.join("\r\n");
    if (!DRY_RUN) {
      fs.writeFile(filePath, updatedFile, err => {
        if (err) {
          console.error("==> Error writing file: ", err);
          return;
        }
        console.log("==> Successfully updated: ", filePath);
      });
    } else {
      console.log(updatedFile);
    }
  });
}

/**
 * @param {string} dir
 */
function processDir(dir) {
  fs.readdirSync(dir).forEach(fileName => {
    const filePath = path.join(dir, fileName);
    const stat = fs.statSync(filePath);

    if (stat.isDirectory()) {
      processDir(filePath);
    } else if (fileName.endsWith(".feature")) {
      updateFeatureFile(filePath);
    }
  });
}

processDir(process.argv[2]);