add prepare_fits_files_for_ingestion()

csst_common/fits.py

@@ -9,6 +9,8 @@ Modified-History:
 """
 
 import io
+import os.path
+
 from astropy.io.fits import *
 from astropy.io import fits as astropy_fits
 from csst_fs.s3_config import load_s3_options
@@ -71,3 +73,18 @@ class HDUList(astropy_fits.HDUList):
             self.writeto(memory_buffer)
             fits_bytes = memory_buffer.getvalue()
         return fits_bytes
+
+
+def prepare_fits_files_for_ingestion(files: list[str]) -> list[dict]:
+    """Prepare FITS files for ingestion."""
+    ingestion_files = []
+    for file in files:
+        with open(file) as hl:
+            fits_bytes = hl.to_bytes()
+        ingestion_files.append(
+            {
+                "file_name": os.path.basename(file),
+                "file_content": fits_bytes,
+            }
+        )
+    return ingestion_files