365 lines
14 KiB
Python
365 lines
14 KiB
Python
"""
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title: OpenStreetMap Tool
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author: projectmoon
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author_url: https://git.agnos.is/projectmoon/open-webui-filters
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version: 0.1.0
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license: AGPL-3.0+
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required_open_webui_version: 0.3.9
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"""
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import json
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import math
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import requests
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from typing import List, Optional
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from pydantic import BaseModel, Field
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VALVES_NOT_SET = """
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Tell the user that the User-Agent and From headers
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must be set to comply with the OSM Nominatim terms
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of use: https://operations.osmfoundation.org/policies/nominatim/
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""".replace("\n", " ").strip()
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NO_RESULTS = ("No results found. Tell the user you found no results. "
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"Do not make up answers or hallucinate. Only say you "
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"found no results.")
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def get_bounding_box_center(bbox):
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def convert(bbox, key):
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return bbox[key] if isinstance(bbox[key], float) else float(bbox[key])
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min_lat = convert(bbox, 'min_lat')
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min_lon = convert(bbox, 'min_lon')
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max_lat = convert(bbox, 'max_lat')
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max_lon = convert(bbox, 'max_lon')
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return {
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'lon': (min_lon + max_lon) / 2,
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'lat': (min_lat + max_lat) / 2
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}
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def haversine_distance(point1, point2):
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R = 6371 # Earth radius in kilometers
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lat1, lon1 = point1['lat'], point1['lon']
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lat2, lon2 = point2['lat'], point2['lon']
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d_lat = math.radians(lat2 - lat1)
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d_lon = math.radians(lon2 - lon1)
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a = (math.sin(d_lat / 2) * math.sin(d_lat / 2) +
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math.cos(math.radians(lat1)) * math.cos(math.radians(lat2)) *
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math.sin(d_lon / 2) * math.sin(d_lon / 2))
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c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
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return R * c
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def sort_by_closeness(origin, points):
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"""
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Sorts a list of { lat, lon }-like dicts by closeness to an origin point.
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The origin is a dict with keys of { lat, lon }. This function adds the
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distance as a dict value to the points.
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"""
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points_with_distance = [(point, haversine_distance(origin, point)) for point in points]
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points_with_distance = sorted(points_with_distance, key=lambda pwd: pwd[1])
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for point, distance in points_with_distance:
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point['distance'] = distance
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return [point for point, distance in points_with_distance]
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class OsmSearcher:
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def __init__(self, valves):
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self.valves = valves
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def create_headers(self) -> Optional[dict]:
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if len(self.valves.user_agent) == 0 or len(self.valves.from_header) == 0:
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return None
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return {
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'User-Agent': self.valves.user_agent,
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'From': self.valves.from_header
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}
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@staticmethod
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def group_tags(tags):
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result = {}
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for tag in tags:
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key, value = tag.split('=')
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if key not in result:
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result[key] = []
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result[key].append(value)
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return result
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@staticmethod
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def fallback(nominatim_result):
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"""
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If we do not have Overpass Turbo results, attempt to use the
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Nominatim result instead.
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"""
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return ([nominatim_result] if 'type' in nominatim_result
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and (nominatim_result['type'] == 'amenity'
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or nominatim_result['type'] == 'shop'
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or nominatim_result['type'] == 'tourism')
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else [])
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def nominatim_search(self, query, format="json") -> Optional[dict]:
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url = self.valves.nominatim_url
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params = {
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'q': query,
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'format': format,
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'addressdetails': 1,
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'limit': 1, # We only need the first result for the bounding box
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}
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headers = self.create_headers()
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if not headers:
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raise ValueError("Headers not set")
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response = requests.get(url, params=params, headers=headers)
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if response.status_code == 200:
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data = response.json()
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if not data:
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raise ValueError(f"No results found for query '{query}'")
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return data[0]
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else:
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print(response.text)
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return None
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def overpass_search(self, place, tags, bbox, limit=5, radius=4000):
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headers = self.create_headers()
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if not headers:
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raise ValueError("Headers not set")
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url = self.valves.overpass_turbo_url
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center = get_bounding_box_center(bbox)
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around = f"(around:{radius},{center['lat']},{center['lon']})"
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tag_groups = OsmSearcher.group_tags(tags)
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search_groups = [f'"{tag_type}"~"{"|".join(values)}"'
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for tag_type, values in tag_groups.items()]
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# only search nodes, which are guaranteed to have a lat and lon.
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searches = []
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for search_group in search_groups:
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searches.append(
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f'node[{search_group}]{around}'
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)
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search = ";\n".join(searches)
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if len(search) > 0:
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search += ";"
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query = f"""
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[out:json];
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(
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{search}
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);
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out qt;
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"""
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print(query)
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data = { "data": query }
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response = requests.get(url, params=data, headers=headers)
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if response.status_code == 200:
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return response.json()
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else:
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print(response.text)
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raise Exception(f"Error calling Overpass API: {response.text}")
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def search_nearby(self, place: str, tags: List[str], limit: int=5) -> str:
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headers = self.create_headers()
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if not headers:
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return VALVES_NOT_SET
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try:
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nominatim_result = self.nominatim_search(place)
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if nominatim_result:
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bbox = {
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'min_lat': nominatim_result['boundingbox'][0],
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'max_lat': nominatim_result['boundingbox'][1],
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'min_lon': nominatim_result['boundingbox'][2],
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'max_lon': nominatim_result['boundingbox'][3]
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}
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overpass_result = self.overpass_search(place, tags, bbox, limit)
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# use results from overpass, but if they do not exist,
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# fall back to the nominatim result. we can get away
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# with this because we're not digging through the
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# objects themselves (as long as they have lat/lon, we
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# are good).
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things_nearby = (overpass_result ['elements']
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if 'elements' in overpass_result
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and len(overpass_result ['elements']) > 0
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else OsmSearcher.fallback(nominatim_result))
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origin = get_bounding_box_center(bbox)
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things_nearby = sort_by_closeness(origin, things_nearby)
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things_nearby = things_nearby[:limit]
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if not things_nearby or len(things_nearby) == 0:
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return NO_RESULTS
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tag_type_str = ", ".join(tags)
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example_link = "https://www.openstreetmap.org/#map=19/<lat>/<lon>"
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return (
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f"These are some of the {tag_type_str} points of interest nearby. "
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"When telling the user about them, make sure to report "
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"all the information (address, contact info, website, etc).\n\n"
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"Tell the user about ALL the results, and give the CLOSEST result "
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"first. The results are ordered by closeness. "
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"Make friendly human-readable OpenStreetMap links when possible, "
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"by using the latitude and longitude of the amenities: "
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f"{example_link}\n\n"
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"Give map links friendly, contextual labels. Don't just print "
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f"the naked link:\n"
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f' - Example: You can view it on [OpenStreetMap]({example_link})'
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f' - Example: Here it is on [OpenStreetMap]({example_link})'
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f' - Example: You can find it on [OpenStreetMap]({example_link})'
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"\n\nAnd so on.\n\n"
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"Only use relevant results. If there are no relevant results, "
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"say so. Do not make up answers or hallucinate."
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f"The results are below.\n\n"
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"----------"
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f"\n\n{str(things_nearby)}"
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)
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else:
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return NO_RESULTS
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except ValueError:
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return NO_RESULTS
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except Exception as e:
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print(e)
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return (f"No results were found, because of an error. "
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f"Tell the user that there was an error finding results. "
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f"The error was: {e}")
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class Tools:
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class Valves(BaseModel):
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user_agent: str = Field(
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default="", description="Unique user agent to identify your OSM API requests."
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)
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from_header: str = Field(
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default="", description="Email address to identify your OSM requests."
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)
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nominatim_url: str = Field(
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default="https://nominatim.openstreetmap.org/search",
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description="URL of OSM Nominatim API for reverse geocoding (address lookup)."
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)
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overpass_turbo_url: str = Field(
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default="https://overpass-api.de/api/interpreter",
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description="URL of Overpass Turbo API for searching OpenStreetMap."
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)
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pass
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class UserValves(BaseModel):
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pass
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def __init__(self):
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self.valves = self.Valves()
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def lookup_location(self, address_or_place: str) -> str:
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"""
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Looks up GPS and address details on OpenStreetMap of a given address or place.
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:param address_or_place: The address or place to look up.
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:return: Address details, if found. None if there's an error.
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"""
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searcher = OsmSearcher(self.valves)
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try:
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result = searcher.nominatim_search(address_or_place)
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if result:
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return str(result)
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else:
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return NO_RESULTS
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except Exception as e:
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print(e)
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return (f"There are no results due to an error. "
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"Tell the user that there was an error. "
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f"The error was: {e}. "
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f"Tell the user the error message.")
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def find_grocery_stores_near_place(self, place: str) -> str:
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"""
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Finds supermarkets, grocery stores, and other food stores on
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OpenStreetMap near a given place or address. The location of the
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address or place is reverse geo-coded, then nearby results
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are fetched from OpenStreetMap.
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:param place: The name of a place or an address, which will be sent to Nominatim.
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:return: A list of nearby grocery stores or supermarkets, if found.
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"""
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searcher = OsmSearcher(self.valves)
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tags = ["shop=supermarket", "shop=grocery", "shop=convenience", "shop=greengrocer"]
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return searcher.search_nearby(place, tags, limit=5)
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def find_bakeries_near_place(self, place: str) -> str:
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"""
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Finds bakeries on OpenStreetMap near a given place or
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address. The location of the address or place is reverse
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geo-coded, then nearby results are fetched from OpenStreetMap.
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:param place: The name of a place or an address, which will be sent to Nominatim.
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:return: A list of nearby bakeries, if found.
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"""
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searcher = OsmSearcher(self.valves)
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tags = ["shop=bakery"]
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return searcher.search_nearby(place, tags, limit=5)
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def find_food_near_place(self, place: str) -> str:
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"""
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Finds restaurants, fast food, bars, breweries, pubs, etc on
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OpenStreetMap near a given place or address. The location of the
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address or place is reverse geo-coded, then nearby results
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are fetched from OpenStreetMap.
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:param place: The name of a place or an address, which will be sent to Nominatim.
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:return: A list of nearby restaurants, eateries, etc, if found.
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"""
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tags = [
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"amenity=restaurant",
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"amenity=fast_food",
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"amenity=cafe",
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"amenity=pub",
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"amenity=bar",
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"amenity=eatery",
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"amenity=biergarten",
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"amenity=canteen"
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]
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searcher = OsmSearcher(self.valves)
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return searcher.search_nearby(place, tags, limit=5)
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def find_place_of_worship_near_place(self, place: str) -> str:
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"""
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Finds places of worship (churches, mosques, temples, etc) on
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OpenStreetMap near a given place or address. The location of the
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address or place is reverse geo-coded, then nearby results
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are fetched from OpenStreetMap.
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:param place: The name of a place or an address, which will be sent to Nominatim.
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:return: A list of nearby places of worship, if found.
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"""
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tags = ["amenity=place_of_worship"]
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searcher = OsmSearcher(self.valves)
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return searcher.search_nearby(place, tags, limit=5)
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def find_accommodation_near_place(self, place: str) -> str:
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"""
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Finds accommodation (hotels, guesthouses, hostels, etc) on
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OpenStreetMap near a given place or address. The location of the
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address or place is reverse geo-coded, then nearby results
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are fetched from OpenStreetMap.
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:param place: The name of a place or an address, which will be sent to Nominatim.
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:return: A list of nearby accommodation, if found.
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"""
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tags = [
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"tourism=hotel", "tourism=chalet", "tourism=guest_house", "tourism=guesthouse",
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"tourism=motel", "tourism=hostel"
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]
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searcher = OsmSearcher(self.valves)
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return searcher.search_nearby(place, tags, limit=5)
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