From 10a5a8e216f440a4489faf2df106808c96aa27e2 Mon Sep 17 00:00:00 2001
From: Andreas Claesson <andcla07@edu.gislaved.se>
Date: Mon, 10 Nov 2025 19:52:56 +0100
Subject: [PATCH] Add container exec and rename support

---
 docker/containerService.js | 92 +++++++++++++++++++++++++++++++++++++-
 routes/containers.js       | 37 ++++++++++++++-
 2 files changed, 127 insertions(+), 2 deletions(-)

diff --git a/docker/containerService.js b/docker/containerService.js
index 557da2b..27a0fac 100644
--- a/docker/containerService.js
+++ b/docker/containerService.js
@@ -89,6 +89,94 @@ async function getContainerLogs(id) {
   return logs.toString();
 }
 
+async function execCommand(id, command) {
+  const container = docker.getContainer(id);
+  
+  // Check if container is running
+  const info = await container.inspect();
+  if (!info.State.Running) {
+    throw new Error('Container is not running');
+  }
+
+  // Create exec instance
+  const exec = await container.exec({
+    Cmd: ['/bin/sh', '-c', command],
+    AttachStdout: true,
+    AttachStderr: true,
+  });
+
+  // Start exec and capture output
+  return new Promise((resolve, reject) => {
+    exec.start({ hijack: true, stdin: false }, (err, stream) => {
+      if (err) {
+        return reject(err);
+      }
+
+      let output = '';
+      let errorOutput = '';
+
+      // Docker multiplexes stdout and stderr into a single stream
+      // Each frame has an 8-byte header
+      stream.on('data', (chunk) => {
+        // Parse Docker stream format
+        let offset = 0;
+        while (offset < chunk.length) {
+          if (chunk.length - offset < 8) break;
+          
+          const header = chunk.slice(offset, offset + 8);
+          const streamType = header[0]; // 1=stdout, 2=stderr
+          const size = header.readUInt32BE(4);
+          
+          offset += 8;
+          
+          if (chunk.length - offset < size) break;
+          
+          const payload = chunk.slice(offset, offset + size).toString('utf8');
+          
+          if (streamType === 1) {
+            output += payload;
+          } else if (streamType === 2) {
+            errorOutput += payload;
+          }
+          
+          offset += size;
+        }
+      });
+
+      stream.on('end', async () => {
+        try {
+          const execInfo = await exec.inspect();
+          console.log(chalk.blue('Command executed:'), chalk.cyan(command), chalk.yellow('Exit code:'), execInfo.ExitCode);
+          
+          resolve({
+            output: (output + errorOutput).trim(),
+            exitCode: execInfo.ExitCode,
+            error: execInfo.ExitCode !== 0 ? errorOutput.trim() : null
+          });
+        } catch (inspectError) {
+          reject(inspectError);
+        }
+      });
+
+      stream.on('error', (streamError) => {
+        reject(streamError);
+      });
+
+      // Set timeout (30 seconds)
+      setTimeout(() => {
+        stream.destroy();
+        reject(new Error('Command execution timeout'));
+      }, 30000);
+    });
+  });
+}
+
+async function renameContainer(id, newName) {
+  const container = docker.getContainer(id);
+  await container.rename({ name: newName });
+  console.log(chalk.yellow('Container renamed:'), chalk.cyan(id), chalk.green('→'), chalk.cyan(newName));
+}
+
 module.exports = {
   listContainers,
   getContainerStats,
@@ -97,5 +185,7 @@ module.exports = {
   restartContainer,
   createContainer,
   removeContainer,
-  getContainerLogs
+  getContainerLogs,
+  execCommand,
+  renameContainer
 };
diff --git a/routes/containers.js b/routes/containers.js
index 3bf34a0..e1ea5da 100644
--- a/routes/containers.js
+++ b/routes/containers.js
@@ -98,4 +98,39 @@ router.get('/:id/logs', async (req, res) => {
   }
 });
 
-module.exports = router;
+// Execute command in container
+router.post('/:id/exec', async (req, res) => {
+  try {
+    const { command } = req.body;
+    
+    if (!command) {
+      return res.status(400).json({ error: 'Command is required' });
+    }
+
+    const result = await containerService.execCommand(req.params.id, command);
+    res.json(result);
+  } catch (error) {
+    res.status(500).json({ 
+      error: error.message || 'Failed to execute command',
+      exitCode: 1 
+    });
+  }
+});
+
+// Rename container
+router.post('/:id/rename', async (req, res) => {
+  try {
+    const { name } = req.query;
+    
+    if (!name) {
+      return res.status(400).json({ error: 'New name is required' });
+    }
+
+    await containerService.renameContainer(req.params.id, name);
+    res.json({ message: 'Container renamed successfully' });
+  } catch (error) {
+    res.status(500).json({ error: 'Failed to rename container' });
+  }
+});
+
+module.exports = router;
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