Konova views

* splits konova/views.py into separate files in new module
    * view files can now be found in /konova/views/...
* introduces first class based view AbstractLogView
    * implemented for Ema, Intervention, Compensation and EcoAccount

konova/views/geometry.py

@@ -0,0 +1,108 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: ksp-servicestelle@sgdnord.rlp.de
+Created on: 19.08.22
+
+"""
+from django.http import HttpResponse, HttpRequest
+from django.shortcuts import get_object_or_404
+from django.template.loader import render_to_string
+
+from konova.models import Geometry, Municipal
+
+
+def get_geom_parcels(request: HttpRequest, id: str):
+    """ Getter for HTMX
+
+    Returns all parcels of the requested geometry rendered into a simple HTML table
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): The geometry's id
+
+    Returns:
+        A rendered piece of HTML
+    """
+    # HTTP code 286 states that the HTMX should stop polling for updates
+    # https://htmx.org/docs/#polling
+    status_code = 286
+    template = "konova/includes/parcels/parcel_table_frame.html"
+    geom = get_object_or_404(Geometry, id=id)
+    parcels = geom.get_underlying_parcels()
+    geos_geom = geom.geom
+
+    parcels_are_currently_calculated = geos_geom is not None and geos_geom.area > 0 and len(parcels) == 0
+    parcels_available = len(parcels) > 0
+    no_geometry_given = geos_geom is None
+
+    if parcels_are_currently_calculated:
+        # Parcels are being calculated right now. Change the status code, so polling stays active for fetching
+        # resutls after the calculation
+        status_code = 200
+
+    if parcels_available or no_geometry_given:
+        parcels = parcels.order_by("-municipal", "flr", "flrstck_zhlr", "flrstck_nnr")
+        municipals = parcels.order_by("municipal").distinct("municipal").values("municipal__id")
+        municipals = Municipal.objects.filter(id__in=municipals)
+
+        rpp = 100
+        num_all_parcels = parcels.count()
+        parcels = parcels[:rpp]
+        next_page = 1
+        if len(parcels) < rpp:
+            next_page = None
+
+        context = {
+            "num_parcels": num_all_parcels,
+            "parcels": parcels,
+            "municipals": municipals,
+            "geom_id": str(id),
+            "next_page": next_page,
+        }
+        html = render_to_string(template, context, request)
+        return HttpResponse(html, status=status_code)
+    else:
+        return HttpResponse(None, status=404)
+
+
+def get_geom_parcels_content(request: HttpRequest, id: str, page: int):
+    """ Getter for infinite scroll of HTMX
+
+    Returns parcels of a specific page/slice of the found parcel set.
+    Implementation of infinite scroll htmx example: https://htmx.org/examples/infinite-scroll/
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): The geometry's id
+        page (int): The requested page number
+
+    Returns:
+        A rendered piece of HTML
+    """
+    if page < 0:
+        raise AssertionError("Parcel page can not be negative")
+
+    # HTTP code 286 states that the HTMX should stop polling for updates
+    # https://htmx.org/docs/#polling
+    status_code = 286
+    template = "konova/includes/parcels/parcel_table_content.html"
+    geom = get_object_or_404(Geometry, id=id)
+    parcels = geom.get_underlying_parcels()
+
+    parcels = parcels.order_by("-municipal", "flr", "flrstck_zhlr", "flrstck_nnr")
+    rpp = 100
+    from_p = rpp * (page-1)
+    to_p = rpp * (page)
+    next_page = page + 1
+    parcels = parcels[from_p:to_p]
+    if len(parcels) < rpp:
+        next_page = None
+
+    context = {
+        "parcels": parcels,
+        "geom_id": str(id),
+        "next_page": next_page,
+    }
+    html = render_to_string(template, context, request)
+    return HttpResponse(html, status=status_code)