add task solution

src/app.js

@@ -1 +1,82 @@
 // write code here
+
+const fs = require('fs/promises');
+const path = require('path');
+
+async function validateSource(source) {
+  const sourceStat = await fs.stat(source);
+
+  if (!sourceStat.isFile()) {
+    throw new Error('Source is not a file');
+  }
+}
+
+async function setDestinationPath(destination, source) {
+  let destinationPath;
+
+  if (destination.endsWith('/')) {
+    try {
+      const destinationStat = await fs.stat(destination);
+
+      if (!destinationStat.isDirectory()) {
+        throw new Error('Destination is not a directory');
+      }
+
+      destinationPath = path.join(destination, path.basename(source));
+    } catch (error) {
+      throw new Error('Destination path is invalid');
+    }
+  } else {
+    try {
+      const destinationStat = await fs.stat(destination);
+
+      if (destinationStat.isDirectory()) {
+        destinationPath = path.join(destination, path.basename(source));
+      } else {
+        destinationPath = destination;
+      }
+    } catch (error) {
+      destinationPath = destination;
+    }
+  }
+
+  return destinationPath;
+}
+
+async function main() {
+  const [source, destination] = process.argv.slice(2);
+
+  if (!source || !destination) {
+    // eslint-disable-next-line no-console
+    console.error('Source and destination paths are required');
+
+    return;
+  }
+
+  const absoluteSource = path.resolve(source);
+  const absoluteDestination = path.resolve(destination);
+
+  if (absoluteSource === absoluteDestination) {
+    return;
+  }
+
+  try {
+    await validateSource(absoluteSource);
+  } catch (error) {
+    // eslint-disable-next-line no-console
+    console.error('Error validating source file: ' + error.message);
+
+    return;
+  }
+
+  const destinationPath = await setDestinationPath(destination, absoluteSource);
+
+  try {
+    await fs.rename(absoluteSource, destinationPath);
+  } catch (error) {
+    // eslint-disable-next-line no-console
+    console.error('Error moving file: ' + error.message);
+  }
+}
+
+main();

src/b/test.txt

@@ -0,0 +1,7 @@
+acdscs
+sdcsdv
+svsfd
+dvs
+ewvsdcdvsd dskvds dskvncdsjcn jsdnc
+sdkncds djcnjdsc sdjcsd c ibbzl`cnoabvhb`hcc idc
+`vsbv s[dvs]