Replace generator-exercise with plop generator

generators/helpers.js

@@ -0,0 +1,30 @@
+const { readdir } = require("fs/promises");
+
+function splitDirectoryName(directoryName) {
+  return {
+    exerciseNumber: directoryName.match(/\d+/),
+    exerciseName: directoryName.match(/[a-z]+/i),
+  };
+}
+
+async function getLatestExerciseDirectory() {
+  try {
+    const files = await readdir("./");
+    return files.findLast((file) => /^\d+_\w+$/.test(file));
+  } catch (err) {
+    console.error(err);
+  }
+}
+
+async function createExerciseDirectoryName(directoryName) {
+  const latestExerciseDirectory = await getLatestExerciseDirectory();
+  const latestExerciseNumber = parseInt(latestExerciseDirectory.match(/^\d+/));
+
+  if (latestExerciseDirectory === `${latestExerciseNumber}_${directoryName}`) {
+    throw new Error(`Exercise already exists with name "${directoryName}"`);
+  }
+
+  return `${latestExerciseNumber + 1}_${directoryName}`;
+}
+
+module.exports = { createExerciseDirectoryName, splitDirectoryName };

generators/writeExercise.js

@@ -0,0 +1,24 @@
+const { writeFile } = require("fs/promises");
+const { join } = require("path");
+const { splitDirectoryName } = require("./helpers");
+
+async function writeExercise(exercisePath) {
+  const { exerciseName } = splitDirectoryName(exercisePath);
+  const isSolutionFile = exercisePath.includes("/solution");
+  const exerciseContent = `const ${exerciseName} = function() {
+  ${isSolutionFile ? "// Replace this comment with the solution code" : ""}
+};
+  
+// Do not edit below this line
+module.exports = ${exerciseName};`;
+
+  await writeFile(
+    join(
+      exercisePath,
+      `${exerciseName}${isSolutionFile ? "-solution" : ""}.js`
+    ),
+    exerciseContent
+  );
+}
+
+module.exports = { writeExercise };

generators/writeExerciseSpec.js

@@ -0,0 +1,34 @@
+const { writeFile } = require("fs/promises");
+const { join } = require("path");
+const { splitDirectoryName } = require("./helpers");
+
+async function writeExerciseSpec(exercisePath) {
+  const { exerciseName } = splitDirectoryName(exercisePath);
+  const isSolutionFile = exercisePath.includes("/solution");
+  const trueExerciseName = isSolutionFile
+    ? `${exerciseName}-solution`
+    : exerciseName;
+
+  const exerciseSpecContent = `const ${exerciseName} = require('./${trueExerciseName}');
+
+describe('${exerciseName}', () => {
+  test('First test description', () => {
+    // Replace this comment with any other necessary code, and update the expect line as necessary
+
+    expect(${exerciseName}()).toBe('');
+  });
+  
+  test${isSolutionFile ? "" : ".skip"}('Second test description', () => {
+    // Replace this comment with any other necessary code, and update the expect line as necessary
+
+    expect(${exerciseName}()).toBe('');
+  });
+});`;
+
+  await writeFile(
+    join(exercisePath, `${trueExerciseName}.spec.js`),
+    exerciseSpecContent
+  );
+}
+
+module.exports = { writeExerciseSpec };

generators/writeReadme.js

@@ -0,0 +1,14 @@
+const { writeFile } = require("fs/promises");
+const { join } = require("path");
+const { splitDirectoryName } = require("./helpers");
+
+async function writeReadme(exercisePath) {
+  const { exerciseNumber, exerciseName } = splitDirectoryName(exercisePath);
+  const readmeContent = `# Exercise ${exerciseNumber} - ${exerciseName}
+
+Description of the exercise goes here.`;
+
+  await writeFile(join(exercisePath, "README.md"), readmeContent);
+}
+
+module.exports = { writeReadme };