Add command to initially load habitat and zone data

backend/right_tree/api/management/commands/loadsitedata.py

@@ -0,0 +1,62 @@
+from django.core.management.base import BaseCommand
+
+from pathlib import Path
+
+import right_tree.api.data
+from ._spreadsheet_helpers import *
+from right_tree.api.models import Habitat, Zone
+
+SPREADSHEET_FILENAME = 'plant_data.xlsx'
+SITE_DATA_START_COL = 25
+HABITAT_ROW = 1
+ZONE_NAME_ROW = 2
+ZONE_VARIANT_ROW = 3
+ZONE_REFINED_VARIANT_ROW = 5
+
+DATA_DIR_PATH = Path(right_tree.api.data.__file__).resolve().parent
+SPREADSHEET = get_spreadsheet(DATA_DIR_PATH, SPREADSHEET_FILENAME)
+
+
+def load_habitat_zone_data(sheet):
+    """ Loads habitat and zone objects from data defined in the spreadsheet.
+    """
+
+    habitats = set()
+    zones = set()
+
+    current_habitat = current_zone = current_variant = current_refined_variant = None
+
+    for col in sheet.iter_cols(min_col=SITE_DATA_START_COL, min_row=ZONE_NAME_ROW, max_row=ZONE_REFINED_VARIANT_ROW, values_only=True):
+        habitat, zone_name, zone_variant, zone_refined_variant = col
+
+        if habitat is not None:
+            current_habitat = habitat
+            current_zone = current_variant = current_refined_variant = None
+
+        current_zone = zone_name if zone_name is not None else current_zone
+        current_variant = zone_variant if zone_variant is not None else current_variant
+        current_refined_variant = zone_refined_variant if zone_refined_variant is not None else current_refined_variant
+
+        habitats.add(current_habitat)
+        zones.add((current_zone, current_variant, current_refined_variant))
+
+    print("Creating Habitat Objects")
+    print("--------------------------")
+    for habitat in habitats:
+        habitat_obj = Habitat(name=habitat)
+        habitat_obj.save()
+
+    print("Creating Zone Objects")
+    print("--------------------------")
+    for zone, variant, refined_variant in zones:
+        zone_obj = Zone(name=zone, variant=variant,
+                        refined_variant=refined_variant)
+        zone_obj.save()
+
+
+class Command(BaseCommand):
+    help = 'Ingests the site spreadsheet data into the database'
+
+    def handle(self, *args, **options):
+        self.stdout.write('Creating habitat/zone fixtures...')
+        load_habitat_zone_data(SPREADSHEET)