feat(logs): Add loading indicator to download all logs buttons (#7847)

app/Livewire/Project/Shared/GetLogs.php

@@ -23,6 +23,8 @@ class GetLogs extends Component
 {
     public const MAX_LOG_LINES = 50000;
 
+    public const MAX_DOWNLOAD_SIZE_BYTES = 50 * 1024 * 1024; // 50MB
+
     public string $outputs = '';
 
     public string $errors = '';
@@ -164,10 +166,12 @@ class GetLogs extends Component
             }
             // Collect new logs into temporary variable first to prevent flickering
             // (avoids clearing output before new data is ready)
-            $newOutputs = '';
-            Process::run($sshCommand, function (string $type, string $output) use (&$newOutputs) {
-                $newOutputs .= removeAnsiColors($output);
+            // Use array accumulation + implode for O(n) instead of O(n²) string concatenation
+            $logChunks = [];
+            Process::timeout(config('constants.ssh.command_timeout'))->run($sshCommand, function (string $type, string $output) use (&$logChunks) {
+                $logChunks[] = removeAnsiColors($output);
             });
+            $newOutputs = implode('', $logChunks);
 
             if ($this->showTimeStamps) {
                 $newOutputs = str($newOutputs)->split('/\n/')->sort(function ($a, $b) {
@@ -215,11 +219,40 @@ class GetLogs extends Component
 
         $sshCommand = SshMultiplexingHelper::generateSshCommand($this->server, $command);
 
-        $allLogs = '';
-        Process::run($sshCommand, function (string $type, string $output) use (&$allLogs) {
-            $allLogs .= removeAnsiColors($output);
+        // Use array accumulation + implode for O(n) instead of O(n²) string concatenation
+        // Enforce 50MB size limit to prevent memory exhaustion from large logs
+        $logChunks = [];
+        $accumulatedBytes = 0;
+        $truncated = false;
+
+        Process::timeout(config('constants.ssh.command_timeout'))->run($sshCommand, function (string $type, string $output) use (&$logChunks, &$accumulatedBytes, &$truncated) {
+            if ($truncated) {
+                return;
+            }
+
+            $output = removeAnsiColors($output);
+            $outputBytes = strlen($output);
+
+            if ($accumulatedBytes + $outputBytes > self::MAX_DOWNLOAD_SIZE_BYTES) {
+                $remaining = self::MAX_DOWNLOAD_SIZE_BYTES - $accumulatedBytes;
+                if ($remaining > 0) {
+                    $logChunks[] = substr($output, 0, $remaining);
+                }
+                $truncated = true;
+
+                return;
+            }
+
+            $logChunks[] = $output;
+            $accumulatedBytes += $outputBytes;
         });
 
+        $allLogs = implode('', $logChunks);
+
+        if ($truncated) {
+            $allLogs .= "\n\n[... Output truncated at 50MB limit ...]";
+        }
+
         if ($this->showTimeStamps) {
             $allLogs = str($allLogs)->split('/\n/')->sort(function ($a, $b) {
                 $a = explode(' ', $a);