ls complete

Author: Alex-Jamshidi

implement-shell-tools/ls/ls.js

@@ -0,0 +1,124 @@
+const fs = require("fs");
+const { allowedNodeEnvironmentFlags } = require("process");
+
+const args = process.argv;
+const userArgs = args.slice(2);
+
+const index = args[1].lastIndexOf("/");
+const currentWorkingDirectory = args[1].slice(0, index);
+
+const flags = userArgs
+  .filter((arg) => arg.startsWith("-"))
+  .map((arg) => arg.slice(1))
+  .join("");
+
+const flagHandlers = {
+  1: Flag1,
+  a: Flaga,
+};
+
+let printInList = false;
+let showAll = false;
+
+const fsItems = userArgs.filter((arg) => !arg.startsWith("-"));
+let dirArgs;
+let fileArgs;
+let outputString = "";
+
+const rawData = fs.readdirSync(currentWorkingDirectory);
+
+checkArgsLength();
+executeFlags();
+filterFilesAndDirs();
+populateOutput();
+print();
+
+function executeFlags() {
+  for (const flag of flags) {
+    if (flagHandlers[flag]) {
+      allFilesContents = flagHandlers[flag]();
+    } else {
+      console.error(
+        `ls: invalid option -- ${flag}\nusage: ls [-@ABCFGHILOPRSTUWXabcdefghiklmnopqrstuvwxy1%,] [--color=when] [-D format] [file ...]`,
+      );
+      process.exit(1);
+    }
+  }
+}
+
+function Flag1() {
+  if (printInList) {
+    outputString = outputString.replaceAll("\t", "\n");
+    outputString = outputString.replaceAll("\n\n", "\n");
+  } else {
+    printInList = true;
+  }
+}
+
+function Flaga() {
+  showAll = true;
+}
+
+function checkArgsLength() {
+  if (fsItems.length == 0) {
+    fsItems.push(".");
+  }
+}
+
+function filterFilesAndDirs() {
+  dirArgs = fsItems.filter((p) => fs.statSync(currentWorkingDirectory + "/" + p).isDirectory());
+  fileArgs = fsItems.filter((p) => !fs.statSync(currentWorkingDirectory + "/" + p).isDirectory());
+  if (showAll == false) {
+    removeDotFiles(fileArgs);
+  }
+}
+
+function populateOutput() {
+  if (fsItems.length == 1) {
+    fileArgs.forEach((file) => {
+      outputString += file + " ";
+    });
+    dirArgs.forEach((dir) => {
+      outputString += dirOutput(dir);
+    });
+  } else {
+    fileArgs.forEach((file) => {
+      outputString += file + "\t";
+    });
+    dirArgs.forEach((dir) => {
+      outputString += "\n\n" + dir + ":\n" + dirOutput(dir);
+    });
+  }
+}
+
+function dirOutput(dir) {
+  let contents = fs.readdirSync(currentWorkingDirectory + "/" + dir);
+  let outputStr = "";
+  if (showAll) {
+    outputStr += ".\t..\t";
+  } else {
+    for (let i = contents.length - 1; i >= 0; i--) {
+      contents = removeDotFiles(contents);
+    }
+  }
+  contents.forEach((item) => {
+    outputStr += item + "\t";
+  });
+  return outputStr;
+}
+
+function removeDotFiles(fileList) {
+  for (let i = fileList.length - 1; i >= 0; i--) {
+    if (fileList[i][0] == ".") {
+      fileList.splice(i, 1);
+    }
+  }
+  return fileList;
+}
+
+function print() {
+  if (printInList == true) {
+    Flag1();
+  }
+  console.log(outputString.trimEnd());
+}