adding date-run instantiation to GrisRun

kis_tools/gris/GrisFitsFile.py

@@ -18,6 +18,7 @@ import matplotlib.pyplot as plt
 import numpy as np
 from astropy.coordinates import SkyCoord, Angle
 from astropy.wcs import WCS
+from pandas import to_datetime
 
 from kis_tools.generic.fits import FitsFile
 from kis_tools.gris.coord_correction_ml import get_coords_ml
@@ -62,6 +63,25 @@ class GrisFitsFile(FitsFile):
         self.parse_filename()
         self.is_parsed = False
 
+    @classmethod
+    def from_date_run(cls, date, run_number):
+
+        # Check date for validity, try to cast to date
+        if not isinstance(date, datetime):
+            date = to_datetime(date)
+
+        # Check operating system and set path accordingly
+        # Assumes mars mounted at Y: on windows
+        if sys.platform == "win32":
+            archive_root = Path('Y:\dat')
+        else:
+            archive_root = Path('/dat')
+        archive = archive_root / 'sdc' / 'gris' / date.strftime("%Y%m%d") / 'level1_split'
+
+        # Glob for files matching the run
+        pattern = f'*l1?_{run_number:03d}*'
+        return GrisFitsFile(list(*archive.glob(pattern)))
+
     def parse_filename(self):
         """Extract metadata from filename"""
         # Extract time from Filename