Merge pull request #47 from outl1ne/update-streamhandler-chunks-filte…

…r-join

refactor: Improve filtering logic for null values in stream handler.

src/StreamHandler.php

@@ -32,16 +32,16 @@ public function handle()
 
             $rawResult = $lastLine;
 
-            $newChunks = collect($lines)->map(fn ($line) => $this->convertLineToArray($line))->filter()->map(fn ($line) => new StreamedChatChunk($line));
+            $newChunks = collect($lines)->map(fn ($line) => $this->convertLineToArray($line))->filter(fn ($value) => $value !== null)->map(fn ($line) => new StreamedChatChunk($line));
             $allChunks = $allChunks->merge($newChunks);
 
             if ($firstLoop) {
                 ($this->firstChunkCallback)($newChunks->first());
             }
 
             ($this->streamCallback)(
-                $newChunks->map(fn ($streamChunk) => $streamChunk->choices[0]['delta']['content'] ?? null)->filter()->join(''),
-                $allChunks->map(fn ($streamChunk) => $streamChunk->choices[0]['delta']['content'] ?? null)->filter()->join(''),
+                $newChunks->map(fn ($streamChunk) => $streamChunk->choices[0]['delta']['content'] ?? null)->filter(fn ($value) => $value !== null)->join(''),
+                $allChunks->map(fn ($streamChunk) => $streamChunk->choices[0]['delta']['content'] ?? null)->filter(fn ($value) => $value !== null)->join(''),
             );
 
             $firstLoop = false;