Node nodejs basics

.gitignore

@@ -0,0 +1,106 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and *not* Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Packsge
+package-lock.json

package.json

@@ -4,17 +4,41 @@
   "description": "This repository is the part of nodejs-assignments https://github.com/AlreadyBored/nodejs-assignments",
   "type": "module",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "fs:create": "node ./src/fs/create.js",
+    "fs:copy": "node ./src/fs/copy.js",
+    "fs:rename": "node ./src/fs/rename.js",
+    "fs:delete": "node ./src/fs/delete.js",
+    "fs:list": "node ./src/fs/list.js",
+    "fs:read": "node ./src/fs/read.js",
+    "cli:env": "set RSS_name1=value1& set RSS_name2=value2& node ./src/cli/env.js",
+    "cli:args": "node ./src/cli/args.js --propName value --prop2Name value2",
+    "modules:cjsToEsm": "node ./src/modules/cjsToEsm.mjs",
+    "hash:calcHash": "node ./src/hash/calcHash.js",
+    "streams:read": "node ./src/streams/read.js",
+    "streams:write": "node ./src/streams/write.js",
+    "streams:transform": "node ./src/streams/transform.js",
+    "zip:compress": "node ./src/zip/compress.js",
+    "zip:decompress": "node ./src/zip/decompress.js",
+    "wt:main": "node ./src/wt/main.js",
+    "cp:cp": "node ./src/cp/cp.js"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/AlreadyBored/node-nodejs-basics.git"
   },
-  "keywords": ["nodejs", "assignments", "alreadybored"],
+  "keywords": [
+    "nodejs",
+    "assignments",
+    "alreadybored"
+  ],
   "author": "alreadybored",
   "license": "ISC",
   "bugs": {
     "url": "https://github.com/AlreadyBored/node-nodejs-basics/issues"
   },
-  "homepage": "https://github.com/AlreadyBored/node-nodejs-basics#readme"
+  "homepage": "https://github.com/AlreadyBored/node-nodejs-basics#readme",
+  "devDependencies": {
+    "@types/node": "^16.11.38"
+  }
 }

src/cli/args.js

@@ -1,3 +1,16 @@
+import { argv } from "process";
+
 export const parseArgs = () => {
-    // Write your code here 
-};
+  const arrayKey = []
+  argv.slice(2).forEach((value, i, arr) => {
+    if (value.indexOf('--') == 0) {
+      arrayKey.push(`${value.slice(2)} is ${arr[i + 1]}`);
+    }
+  });
+  console.log(arrayKey.join(', '));
+};
+
+//npm run cli:args
+//or
+//node ./src/cli/args.js --propName value --prop2Name value2
+parseArgs();

src/cli/env.js

@@ -1,3 +1,16 @@
+import { env } from "process";
+
 export const parseEnv = () => {
-    // Write your code here 
-};
+  const arrayKey = [];
+  Object.entries(env).forEach((property) => {
+    if (property[0].indexOf('RSS_') == 0) {
+      arrayKey.push(`${property[0]}=${property[1]}`);
+    };
+  });
+  console.log(arrayKey.join('; '));
+};
+
+//npm run cli:env
+//or
+//RSS_name1=value1 RSS_name2=value2 node ./src/cli/env.js
+parseEnv();

src/cp/cp.js

@@ -1,3 +1,24 @@
+import { spawn } from "child_process";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
+const __dirname = fileURLToPath(new URL('.', import.meta.url));
+
 export const spawnChildProcess = async (args) => {
-    // Write your code here
-};
+  const child = spawn('node', ['script.js', ...args], {
+    cwd: join(__dirname, 'files'),
+    stdio: ['pipe', 'pipe', 'pipe', 'ipc']
+  });
+  child.stdout.on('data', (chunk) => {
+    process.stdout.write(chunk.toString());
+  });
+  process.stdin.on('data', (chunk) => {
+    child.stdin.write(chunk.toString());
+  })
+  child.on('close', () => {
+    process.exit();
+  })
+};
+
+//npm run cp:cp
+spawnChildProcess([1, 2, 3, 4, 5]);

src/fs/copy.js

@@ -1,3 +1,37 @@
+import { copyFile, mkdir, readdir } from "fs/promises";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
 export const copy = async () => {
-    // Write your code here 
-};
+  const __dirname = fileURLToPath(new URL('.', import.meta.url));
+  const pathToSourseDir = join(__dirname, 'files');
+  const pathToDestinationDir = join(__dirname, 'files_copy');
+
+  const copyElements = async (pathToSourseDir, pathToDestinationDir) => {
+    await mkdir(pathToDestinationDir).catch(() => {
+      throw new Error('FS operation failed');
+    });
+    const elements = await readdir(pathToSourseDir, {withFileTypes: true}).then((dirents) => {
+      const elements = {files: [], directory: []};
+      dirents.forEach((dirent) => dirent.isFile() ? elements.files.push(dirent) : elements.directory.push(dirent));
+      return elements;
+    }).catch(() => {
+      throw new Error('FS operation failed');
+    });
+    for (const file of elements.files) {
+      const pathToSourseFile = join(pathToSourseDir, file.name);
+      const pathToDestinationFile = join(pathToDestinationDir, file.name);
+      await copyFile(pathToSourseFile, pathToDestinationFile);
+    };
+    for (const directory of elements.directory) {
+      const pathToSourseDirectory = join(pathToSourseDir, directory.name);
+      const pathToDestinationDirectory = join(pathToDestinationDir, directory.name);
+      await copyElements(pathToSourseDirectory, pathToDestinationDirectory);
+    }
+  }
+
+  await copyElements(pathToSourseDir, pathToDestinationDir);
+};
+
+//npm run fs:copy
+copy();

src/fs/create.js

@@ -1,3 +1,20 @@
+import { writeFile } from "fs/promises";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
 export const create = async () => {
-    // Write your code here 
-};
+  const __dirname = fileURLToPath(new URL('.', import.meta.url));
+  const pathToFile = join(__dirname, 'files', 'fresh.txt');
+  const contentFile = 'I am fresh and young';
+
+  await writeFile(pathToFile, contentFile, {
+    flag: 'wx'
+  }).then(() => {
+    console.log('file created successfully');
+  }).catch(() => {
+    throw new Error('FS operation failed');
+  });
+};
+
+//npm run fs:create
+create();

src/fs/delete.js

@@ -1,3 +1,14 @@
+import { rm } from "fs/promises";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
 export const remove = async () => {
-    // Write your code here 
-};
+  const __dirname = fileURLToPath(new URL('.', import.meta.url));
+  const pathToFile = join(__dirname, 'files', 'fileToRemove.txt');
+  await rm(pathToFile).catch(() => {
+    throw new Error('FS operation failed');
+  }) 
+};
+
+//npm run fs:delete
+remove();

src/fs/list.js

@@ -1,3 +1,18 @@
+import { readdir } from "fs/promises";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
 export const list = async () => {
-    // Write your code here 
-};
+  const __dirname = fileURLToPath(new URL('.', import.meta.url));
+  const pathToDir = join(__dirname, 'files');
+  await readdir(pathToDir, {withFileTypes: true}).then((dirents) => {
+    dirents.forEach((dirent) => {
+      if (dirent.isFile()) console.log(dirent.name);
+    })
+  }).catch(() => {
+    throw new Error('FS operation failed');
+  });
+};
+
+//npm run fs:list
+list();

src/fs/read.js

@@ -1,3 +1,16 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
 export const read = async () => {
-    // Write your code here 
-};
+  const __dirname = fileURLToPath(new URL('.', import.meta.url));
+  const pathToFile = join(__dirname, 'files', 'fileToRead.txt');
+  await readFile(pathToFile, 'utf-8').then((content) => {
+    console.log(content);
+  }).catch(() => {
+    throw new Error('FS operation failed');
+  })
+};
+
+//npm run fs:read
+read();

src/fs/rename.js

@@ -1,3 +1,15 @@
+import * as fsp from "fs/promises";
+import { join } from "path";
+import { fileURLToPath, URL } from "url";
+
 export const rename = async () => {
-    // Write your code here 
-};
+  const __dirname = fileURLToPath(new URL('.', import.meta.url));
+  const pathToOldFile = join(__dirname, 'files', 'wrongFilename.txt');
+  const pathToNewFile = join(__dirname, 'files', 'wrongFilename.md');
+  await fsp.rename(pathToOldFile, pathToNewFile).catch(() => {
+    throw new Error('FS operation failed');
+  });
+};
+
+//npm run fs:rename
+rename();