Add solution

readme.md

@@ -2,7 +2,7 @@
 
 **Read [the guideline](https://github.com/mate-academy/js_task-guideline/blob/master/README.md) before start**
 
-Write an app that will move a file from one location to another like Linux mv
+Write an app that will move a file from one location to another like Linux (or Mac) mv
 command: `mv file.txt ./someDir/` (this will create `file.txt` in `./someDir`
 and remove the source file).
 - If a destination contains `/` in the end it must be considered as a directory.

src/app.js

@@ -1 +1,82 @@
+/* eslint-disable no-console */
 // write code here
+'use strict';
+
+const fs = require('fs/promises');
+const path = require('path');
+
+async function move(oldPath, newPath) {
+  try {
+    if (!oldPath || !newPath) {
+      throw new Error('Exactly two arguments are required');
+    }
+
+    if (oldPath === newPath) {
+      return;
+    }
+
+    const srcStats = await fs.stat(oldPath);
+
+    if (!srcStats.isFile()) {
+      throw new Error('Source is not a file');
+    }
+
+    const trailing = newPath.endsWith(path.sep) || newPath.endsWith('/');
+    let dest;
+
+    if (trailing) {
+      const destStats = await fs.stat(newPath);
+
+      if (!destStats.isDirectory()) {
+        throw new Error('Destination is not a directory');
+      }
+
+      dest = path.join(newPath, path.basename(oldPath));
+    } else {
+      try {
+        const destStats = await fs.stat(newPath);
+
+        if (destStats.isDirectory()) {
+          dest = path.join(newPath, path.basename(oldPath));
+        } else {
+          dest = newPath;
+        }
+      } catch (err) {
+        if (err.code === 'ENOENT') {
+          const destDir = path.dirname(newPath);
+          const dirStats = await fs.stat(destDir);
+
+          if (!dirStats.isDirectory()) {
+            throw new Error('Destination directory does not exist');
+          }
+
+          dest = newPath;
+        } else {
+          throw err;
+        }
+      }
+    }
+
+    await fs.rename(oldPath, dest);
+    console.log(`Moved ${oldPath} to ${dest}`);
+  } catch (err) {
+    console.error('Move error:', err.message);
+  }
+}
+
+if (require.main === module) {
+  const args = process.argv.slice(2);
+
+  if (args.length !== 2) {
+    console.error('Exactly two arguments are required');
+  }
+
+  const [oldPath, newPath] = args;
+
+  move(oldPath, newPath).catch((err) => {
+    console.error(err);
+    process.exit(1);
+  });
+}
+
+module.exports = { move };