Add First Version Of Workflow Layer Codes

workflow/image_reader_module.py

@@ -0,0 +1,42 @@
+import cv2
+import os
+from workflow.module import Module
+from workflow.io_port import OutPort, NIFTIImageType, MaskType
+# Codes Go Below:
+
+
+class ImageReader(Module):
+    """
+    Pure logical node.
+    No runtime, no Dagster, no Engine.
+    Only defines ports and run(context) logic.
+    """
+    def __init__(self):
+        super().__init__("ImageReader")
+
+        # Define output ports
+        self.addOutPort(OutPort("image", NIFTIImageType()))
+        self.addOutPort(OutPort("mask", MaskType()))
+
+    def run(self, context):
+        """
+        Pure logic: read image + mask from disk.
+        No Dagster, no Engine, no state.
+        """
+
+        image_path = "data/images/image.nii.gz"
+        mask_path = "data/masks/mask.nii.gz"
+
+        if not os.path.exists(image_path):
+            raise FileNotFoundError(f"Image not found: {image_path}")
+
+        if not os.path.exists(mask_path):
+            raise FileNotFoundError(f"Mask not found: {mask_path}")
+
+        image = cv2.imread(image_path, cv2.IMREAD_UNCHANGED)
+        mask = cv2.imread(mask_path, cv2.IMREAD_UNCHANGED)
+
+        return {
+            "image": image,
+            "mask": mask
+        }