✨ (CodeBlockExtractor.py): Add a new component 'Code Block Extractor' to extract code blocks from text for langflow application.

src/backend/base/langflow/components/helpers/CodeBlockExtractor.py

@@ -0,0 +1,25 @@
+import re
+
+from langflow.custom import Component
+from langflow.field_typing import Input, Output, Text
+
+
+class CodeBlockExtractor(Component):
+    display_name = "Code Block Extractor"
+    description = "Extracts code block from text."
+
+    inputs = [Input(name="text", field_type=Text, description="Text to extract code blocks from.")]
+
+    outputs = [Output(name="code_block", display_name="Code Block", method="get_code_block")]
+
+    def get_code_block(self) -> Text:
+        text = self.text.strip()
+        # Extract code block
+        # It may start with ``` or ```language
+        # It may end with ```
+        pattern = r"^```(?:\w+)?\s*\n(.*?)(?=^```)```"
+        match = re.search(pattern, text, re.MULTILINE)
+        code_block = ""
+        if match:
+            code_block = match.group(1)
+        return code_block