mirror of
https://expo.survex.com/repositories/troggle/.git
synced 2024-11-24 00:01:54 +00:00
293 lines
11 KiB
Python
293 lines
11 KiB
Python
import math
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import os
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import re
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from urllib.parse import urljoin
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from pathlib import Path
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from django.conf import settings
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from django.db import models
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from django.urls import reverse
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from troggle.core.utils import height_from_utm, throw
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# from troggle.core.models.troggle import DataIssue # circular import. Hmm
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class SurvexFile(models.Model):
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path = models.CharField(max_length=200)
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#survexdirectory = models.ForeignKey("SurvexDirectory", blank=True, null=True, on_delete=models.SET_NULL)
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primary = models.ForeignKey(
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"SurvexFile", related_name="primarysurvex", blank=True, null=True, on_delete=models.SET_NULL
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)
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cave = models.ForeignKey("Cave", blank=True, null=True, on_delete=models.SET_NULL)
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class Meta:
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ordering = ("id",)
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# Don't change from the default as that breaks troggle webpages and internal referencing!
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# def __str__(self):
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# return "[SurvexFile:"+str(self.path) + "-" + str(self.survexdirectory) + "-" + str(self.cave)+"]"
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def exists(self):
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"""This is only used within the Django templates
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"""
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fname = Path(settings.SURVEX_DATA, self.path + ".svx")
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return fname.is_file()
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# Don't change from the default as that breaks troggle webpages and internal referencing!
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# def __str__(self):
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# return "[SurvexFile:"+str(self.path) + "-" + str(self.survexdirectory) + "-" + str(self.cave)+"]"
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def __str__(self):
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return self.path
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class SurvexStationLookUpManager(models.Manager):
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"""what this does,
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https://docs.djangoproject.com/en/dev/topics/db/managers/
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This changes the .objects thinggy to use a case-insensitive match name__iexact
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so that now SurvexStation.objects.lookup() works as a case-insensitive match
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"""
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def lookup(self, name):
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blocknames, sep, stationname = name.rpartition(".")
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return self.get(block=SurvexBlock.objects.lookup(blocknames), name__iexact=stationname)
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class SurvexStation(models.Model):
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name = models.CharField(max_length=100)
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# block = models.ForeignKey("SurvexBlock", null=True, on_delete=models.SET_NULL)
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# block not used since 2020. survex stations objects are only used for entrance locations and all taken from the .3d file
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objects = SurvexStationLookUpManager() # overwrites SurvexStation.objects and enables lookup()
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x = models.FloatField(blank=True, null=True)
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y = models.FloatField(blank=True, null=True)
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z = models.FloatField(blank=True, null=True)
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entrance = models.ForeignKey("Entrance", blank=True, null=True, on_delete=models.SET_NULL)
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class Meta:
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ordering = ("id",)
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def __str__(self):
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return self.name and str(self.name) or "no name"
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def latlong(self):
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return utmToLatLng(33, self.x, self.y, northernHemisphere=True)
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def lat(self):
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return utmToLatLng(33, self.x, self.y, northernHemisphere=True)[0]
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def long(self):
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return utmToLatLng(33, self.x, self.y, northernHemisphere=True)[1]
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def srtm_alt(self):
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"""Caches the srtm data so that searches are not done twice on the same page"""
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if not hasattr(self,"srtm"):
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self.srtm = height_from_utm(self.x, self.y) # height, distance from reference point
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return self.srtm # (nearest point, nearest distance)
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def srtm_diff(self):
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alt, ref = self.srtm_alt()
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diff = alt - self.z
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if diff >= 0.3:
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colour = "blue"
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sign = "+"
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elif diff <= -0.3:
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colour = "red"
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sign = ""
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else:
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diff = 0
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colour = "grey"
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sign = ""
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if abs(diff) > 60:
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weight = "bold"
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else:
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weight = "normal"
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diff_str = f"<span style='color:{colour}; font-weight:{weight}'>{sign}{diff:.0f}</span>"
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if ref >= throw:
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colour = "grey"
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weight = "normal"
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diff = "XX"
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ref = float("nan")
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diff_str = f"<span style='color:{colour}'>XX</span>"
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return diff_str, ref
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def utmToLatLng(zone, easting, northing, northernHemisphere=True): # move this to utils.py ?
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if not northernHemisphere:
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northing = 10000000 - northing
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a = 6378137
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e = 0.081819191
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e1sq = 0.006739497
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k0 = 0.9996
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arc = northing / k0
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mu = arc / (a * (1 - math.pow(e, 2) / 4.0 - 3 * math.pow(e, 4) / 64.0 - 5 * math.pow(e, 6) / 256.0))
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ei = (1 - math.pow((1 - e * e), (1 / 2.0))) / (1 + math.pow((1 - e * e), (1 / 2.0)))
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ca = 3 * ei / 2 - 27 * math.pow(ei, 3) / 32.0
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cb = 21 * math.pow(ei, 2) / 16 - 55 * math.pow(ei, 4) / 32
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cc = 151 * math.pow(ei, 3) / 96
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cd = 1097 * math.pow(ei, 4) / 512
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phi1 = mu + ca * math.sin(2 * mu) + cb * math.sin(4 * mu) + cc * math.sin(6 * mu) + cd * math.sin(8 * mu)
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n0 = a / math.pow((1 - math.pow((e * math.sin(phi1)), 2)), (1 / 2.0))
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r0 = a * (1 - e * e) / math.pow((1 - math.pow((e * math.sin(phi1)), 2)), (3 / 2.0))
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fact1 = n0 * math.tan(phi1) / r0
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_a1 = 500000 - easting
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dd0 = _a1 / (n0 * k0)
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fact2 = dd0 * dd0 / 2
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t0 = math.pow(math.tan(phi1), 2)
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Q0 = e1sq * math.pow(math.cos(phi1), 2)
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fact3 = (5 + 3 * t0 + 10 * Q0 - 4 * Q0 * Q0 - 9 * e1sq) * math.pow(dd0, 4) / 24
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fact4 = (61 + 90 * t0 + 298 * Q0 + 45 * t0 * t0 - 252 * e1sq - 3 * Q0 * Q0) * math.pow(dd0, 6) / 720
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lof1 = _a1 / (n0 * k0)
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lof2 = (1 + 2 * t0 + Q0) * math.pow(dd0, 3) / 6.0
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lof3 = (5 - 2 * Q0 + 28 * t0 - 3 * math.pow(Q0, 2) + 8 * e1sq + 24 * math.pow(t0, 2)) * math.pow(dd0, 5) / 120
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_a2 = (lof1 - lof2 + lof3) / math.cos(phi1)
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_a3 = _a2 * 180 / math.pi
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latitude = 180 * (phi1 - fact1 * (fact2 + fact3 + fact4)) / math.pi
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if not northernHemisphere:
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latitude = -latitude
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longitude = ((zone > 0) and (6 * zone - 183.0) or 3.0) - _a3
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return (latitude, longitude)
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#
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# Single SurvexBlock
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#
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class SurvexBlockLookUpManager(models.Manager):
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"""what this does,
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https://docs.djangoproject.com/en/dev/topics/db/managers/
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This adds a method to the .objects thinggy to use a case-insensitive match name__iexact
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so that now SurvexBlock.objects.lookup() works as a case-insensitive match.
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This is used in lookup() in SurvexStationLookUpManager()
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which is used in Entrance().other_location() which is used in the Cave webpage
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"""
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def lookup(self, name):
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if name == "":
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blocknames = []
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else:
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blocknames = name.split(".")
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block = SurvexBlock.objects.get(parent=None, survexfile__path=settings.SURVEX_TOPNAME)
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for blockname in blocknames:
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block = SurvexBlock.objects.get(parent=block, name__iexact=blockname)
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return block
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class SurvexBlock(models.Model):
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"""One begin..end block within a survex file. The basic element of a survey trip.
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Multiple anonymous survex blocks are possible within the same surfex file
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Blocks can span several *included survexfile though.
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"""
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objects = SurvexBlockLookUpManager() # overwrites SurvexBlock.objects and enables lookup()
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name = models.CharField(max_length=100)
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title = models.CharField(max_length=200)
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parent = models.ForeignKey("SurvexBlock", blank=True, null=True, on_delete=models.SET_NULL)
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date = models.DateField(blank=True, null=True)
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expedition = models.ForeignKey("Expedition", blank=True, null=True, on_delete=models.SET_NULL)
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# if the survexfile object is deleted, then all the survex-blocks in it should be too,
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# though a block can span more than one file...
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survexfile = models.ForeignKey("SurvexFile", blank=True, null=True, on_delete=models.CASCADE)
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# survexpath = models.CharField(max_length=200, blank=True, null=True) No need for this anymore
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scanswallet = models.ForeignKey(
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"Wallet", null=True, on_delete=models.SET_NULL
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) # only ONE wallet per block. The most recent seen overwites.. ugh.
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legsall = models.IntegerField(null=True) # summary data for this block
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legslength = models.FloatField(null=True)
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class Meta:
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ordering = ("id",)
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def __str__(self):
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return self.name and str(self.name) or "no_name-#" + str(self.id)
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def isSurvexBlock(self): # Function used in templates
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return True
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def DayIndex(self):
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"""This is used to set different colours for the different trips on
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the calendar view of the expedition"""
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# print(f"SurvexBlock DayIndex {self.name} '{self.date}' {len(list(SurvexBlock.objects.filter(date=self.date)))} on this date")
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mx = 10
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todays = list(SurvexBlock.objects.filter(date=self.date))
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if self in todays:
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index = todays.index(self)
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else:
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print(f"DayIndex: Synchronization error in survex blocks. Restart server or do full reset. {self}")
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index = 0
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if index not in range(0, mx):
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print(f"DayIndex: More than {mx-1} SurvexBlock items on one day '{index}' {self}, restarting colour sequence.")
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index = index % mx
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return index
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class SurvexPersonRole(models.Model):
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"""The CASCADE means that if a SurvexBlock or a Person is deleted, then the SurvexPersonRole
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is deleted too
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"""
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survexblock = models.ForeignKey("SurvexBlock", on_delete=models.CASCADE)
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# increasing levels of precision, Surely we only need survexblock and (either person or personexpedition)?
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personname = models.CharField(max_length=100)
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person = models.ForeignKey("Person", blank=True, null=True, on_delete=models.CASCADE) # not needed
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personexpedition = models.ForeignKey("PersonExpedition", blank=True, null=True, on_delete=models.SET_NULL)
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def __str__(self):
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return str(self.personname) + " - " + str(self.survexblock)
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class SingleScan(models.Model):
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"""A single file holding an image. Could be raw notes, an elevation plot or whatever"""
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ffile = models.CharField(max_length=200)
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name = models.CharField(max_length=200)
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wallet = models.ForeignKey("Wallet", null=True, on_delete=models.SET_NULL)
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class Meta:
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ordering = ("name",)
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def get_absolute_url(self):
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# we do not use URL_ROOT any more.
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return reverse("scansingle", kwargs={"path": re.sub("#", "%23", self.wallet.walletname), "file": self.name})
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def __str__(self):
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return "Scan Image: " + str(self.name) + " in " + str(self.wallet)
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class DrawingFile(models.Model):
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"""A file holding a Therion (several types) or a Tunnel drawing
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Most of the implied capabilities are not implemented yet"""
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dwgpath = models.CharField(max_length=200)
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dwgname = models.CharField(max_length=200)
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dwgwallets = models.ManyToManyField("Wallet") # implicitly links via folders to scans to SVX files
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scans = models.ManyToManyField("SingleScan") # implicitly links via scans to SVX files
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dwgcontains = models.ManyToManyField("DrawingFile") # case when its a frame type
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filesize = models.IntegerField(default=0)
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npaths = models.IntegerField(default=0)
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survexfiles = models.ManyToManyField("SurvexFile") # direct link to SVX files - not populated yet
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class Meta:
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ordering = ("dwgpath",)
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def __str__(self):
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return "Drawing File: " + str(self.dwgname) + " (" + str(self.filesize) + " bytes)"
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