Sheffield | 25-SDC-Nov | Sheida Shabankari | Sprint 3 |Implement shell tools

.gitignore

@@ -1 +1,2 @@
 node_modules
+../../implement-cowsay/.venv/

implement-shell-tools/cat/cat.js

@@ -0,0 +1,39 @@
+import { promises as fs } from "node:fs";
+import { glob } from "glob";
+async function readFile() {
+  let fileNamePattern;
+  let flag;
+  if (process.argv[2].startsWith("-")) {
+    flag = process.argv[2];
+    fileNamePattern = process.argv[3];
+  } else {
+    fileNamePattern = process.argv[2];
+  }
+
+  const filesNameArray = await glob(fileNamePattern);
+  filesNameArray.sort();
+  let lineNumber = 1;
+
+  for (const file of filesNameArray) {
+    const fileContent = await fs.readFile(file, "utf-8");
+    if (flag == null) {
+      console.log(fileContent);
+    } else {
+      const linesOfText = fileContent.split(/\r?\n/);
+      if (linesOfText[linesOfText.length - 1].trim() === "") {
+        linesOfText.pop();
+      }
+
+      for (const line of linesOfText) {
+        if (line.trim() === "" && flag === "-b") {
+          console.log(line);
+        } else {
+          console.log(`${lineNumber} ${line}`);
+          lineNumber++;
+        }
+      }
+    }
+  }
+}
+
+readFile();

implement-shell-tools/cat/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

implement-shell-tools/ls/ls.js

@@ -0,0 +1,29 @@
+import { promises as fs } from "node:fs";
+async function listDir() {
+  let finalFileList;
+  const flag = process.argv[2];
+  const argvArray = process.argv.slice(2);
+
+  const flags = argvArray.filter((item) => item.startsWith("-"));
+
+  const Path =
+    argvArray.filter((item) => !item.startsWith("-")) || process.cwd();
+
+  const isSingleColumn = flags.includes("-1");
+
+  const fileListArray = await fs.readdir(Path[0] || process.cwd());
+  if (flags.includes("-a")) {
+    finalFileList = fileListArray;
+  } else {
+    finalFileList = fileListArray.filter((file) => !file.startsWith("."));
+  }
+
+  if (isSingleColumn) {
+    for (const item of finalFileList) {
+      console.log(item);
+    }
+  } else {
+    console.log(finalFileList.join(" "));
+  }
+}
+listDir();

implement-shell-tools/ls/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

implement-shell-tools/wc/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

implement-shell-tools/wc/wc.js

@@ -0,0 +1,66 @@
+import { promises as fs } from "node:fs";
+async function wcJsImplement() {
+
+    let totalLines=0,totalWords=0,TotalBytes=0;
+    let words,bytes;
+    const commandLineArray=process.argv.slice(2);
+    const flags = commandLineArray.filter((item) => item.startsWith("-"));
+
+    if(flags.length !==0 )
+    {
+        commandLineArray.shift();
+    }
+
+    function printOutput(lines,words,bytes,lable){
+      switch (flags[0]) {
+        case "-l":
+          console.log(`${String(lines).padStart(4)} ${lable}`);
+          break;
+        case "-w":
+          console.log(`${String(words).padStart(4)} ${lable}`);
+          break;
+        case "-c":
+          console.log(`${String(bytes).padStart(4)} ${lable}`);
+          break;
+        default:
+          console.log(
+            `${String(lines).padStart(4)}${String(words).padStart(
+              4
+            )}${String(bytes).padStart(4)} ${lable}`
+          );
+      }
+    }
+
+
+    for(const file of commandLineArray){
+        const buffer = await fs.readFile(file);
+        const fileContent=buffer.toString("utf-8");
+        bytes=buffer.length;
+        TotalBytes += bytes;
+
+        const lines=fileContent.split(/\r?\n/);
+        let linesCount,wordsCount=0;
+        //Calculate count of lines
+        if(lines[lines.length-1].trim()===""){
+            lines.pop();
+            linesCount=lines.length;
+            totalLines += linesCount;
+        }
+        //calculate count of words
+        for(const line of lines){
+            words=line.trim().split(/\s+/);
+            if (words[0].trim() !== ""){
+                 wordsCount += words.length;
+            }
+        }
+        totalWords += wordsCount;
+
+        printOutput(linesCount,wordsCount,bytes,file);
+    }
+
+    if(commandLineArray.length>1){
+      printOutput(totalLines, totalWords, TotalBytes, "total");
+    }
+
+}
+wcJsImplement();