led_karte/get_coordinates.py

#!/usr/bin/python
import requests
import json
import pickle
import os.path
import svgwrite
import math
import sys
import concurrent.futures

URL = "https://directory.spaceapi.io/"
NORTHERNMOST = 55.05
EASTERNMOST = 15.033333
SOUTHERNMOST = 47.270108
WESTERNMOST = 5.866667
threshold = 0.10
YSPAN = NORTHERNMOST - SOUTHERNMOST
XSPAN = EASTERNMOST - WESTERNMOST
locations = {}
ignorelist = ["Chaostreff Salzburg", "DevLoL", "CCC Basel", "Chaostreff Zürich",
              "ChaosStuff", "Level2", "Bastli", "Maakplek", "TkkrLab", "Hack42",
              "Hackerspace Nijmegen", "TDvenlo", "ACKspace"]


def dist(n1, n2):
    y = n1[0] - n2[0]
    x = n1[1] - n2[1]
    return math.sqrt(math.pow(x, 2) + math.pow(y, 2))


def conflict(targetlist, node):
    returner = None
    for element in targetlist:
        if dist(node, targetlist[element]) < threshold:
            returner = element
            continue
    return returner


def merge(n1, n2):
    lat = (n1[0] + n2[0]) / 2
    lon = (n1[1] + n2[1]) / 2
    returner = []
    returner.append(lat)
    returner.append(lon)
    return returner


def get_space_location(space):
    try:
        spacerequest = requests.get(url=data[space], timeout=1)
        spacedata = spacerequest.json()
    except requests.exceptions.RequestException as _:  # This is the correct syntax
        return
    except json.JSONDecodeError as _:
        return
    if "location" in spacedata:
        if "lat" in spacedata["location"]:
            lat = spacedata["location"]["lat"]
            lon = spacedata["location"]["lon"]
            return [float(lat), float(lon)]


if os.path.isfile('locations.bin'):
    print("using offline data...", file=sys.stderr)
    with open("locations.bin", "rb") as f:
        locations = pickle.load(f)
else:
    print("offline data not available, downloading...,", file=sys.stderr)
    r = requests.get(url=URL)
    data = r.json()
    with concurrent.futures.ThreadPoolExecutor(max_workers=16) as executor:
        futures = {}
        for space in data:
            futures[space] = executor.submit(get_space_location, space)
        for space in data:
            location = futures[space].result()
            if location:
                locations[space] = location
    print("done loading space data", file=sys.stderr)

    for space in locations:
        print(space + " " + str(locations[space]))
    with open("locations.bin", "wb") as f:
        pickle.dump(locations, f, pickle.HIGHEST_PROTOCOL)

print("Removing non-german points...", file=sys.stderr)
german_locations = locations.copy()
for space in locations:
    if locations[space][0] > NORTHERNMOST:
        del german_locations[space]
    elif locations[space][0] < SOUTHERNMOST:
        del german_locations[space]
    elif locations[space][1] < WESTERNMOST:
        del german_locations[space]
    elif locations[space][1] > EASTERNMOST:
        del german_locations[space]

for space in ignorelist:
    del german_locations[space]

finallist = {}
while german_locations:
    n1 = next(iter(german_locations))
    conflictnode = conflict(finallist, german_locations[n1])
    if conflictnode == None:
        finallist.update({n1: german_locations[n1]})
        del german_locations[n1]
    else:
        mergenode = merge(german_locations[n1], finallist[conflictnode])
        del german_locations[n1]
        del finallist[conflictnode]
        german_locations.update(
            {"MERGED: " + n1 + " " + conflictnode: mergenode})

for space in finallist:
    #print(space + " " + str(finallist[space][0]) + " " + str(finallist[space][1]))
    print(str(finallist[space][0]) + " " + str(finallist[space][1]) + " {" +
          space + "}")

dwg = svgwrite.Drawing('svgwrite-example.svg', profile='tiny')
dwg.add(svgwrite.image.Image(href="Karte_Deutschland.svg", size=(586, 793)))
for space in finallist:
    ypoint = (793 - (((finallist[space][0] - SOUTHERNMOST) / YSPAN) * 793))
    xpoint = ((finallist[space][1] - WESTERNMOST) / XSPAN) * 586
    dwg.add(dwg.circle(center=(xpoint, ypoint), r=5, fill='green'))

dwg.save()