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.gitignore vendored Normal file
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# https://dart.dev/guides/libraries/private-files
# Created by `dart pub`
.dart_tool/

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CHANGELOG.md Normal file
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## 1.0.0
- Initial version.

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README.md Normal file
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A sample command-line application with an entrypoint in `bin/`, library code
in `lib/`, and example unit test in `test/`.

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analysis_options.yaml Normal file
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# This file configures the static analysis results for your project (errors,
# warnings, and lints).
#
# This enables the 'recommended' set of lints from `package:lints`.
# This set helps identify many issues that may lead to problems when running
# or consuming Dart code, and enforces writing Dart using a single, idiomatic
# style and format.
#
# If you want a smaller set of lints you can change this to specify
# 'package:lints/core.yaml'. These are just the most critical lints
# (the recommended set includes the core lints).
# The core lints are also what is used by pub.dev for scoring packages.
include: package:lints/recommended.yaml
# Uncomment the following section to specify additional rules.
# linter:
# rules:
# - camel_case_types
# analyzer:
# exclude:
# - path/to/excluded/files/**
# For more information about the core and recommended set of lints, see
# https://dart.dev/go/core-lints
# For additional information about configuring this file, see
# https://dart.dev/guides/language/analysis-options

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bin/rugreefer.dart Normal file
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import 'package:rugreefer/rugreefer.dart'; // Ensure this import is correct
void main() {
print('Hello world!'); // Remove the missing method call
}

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lib/rugreefer.dart Normal file
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import 'dart:convert';
import 'dart:io';
import 'package:http/http.dart' as http;
import 'package:dart_geohash/dart_geohash.dart';
import 'package:latlong2/latlong.dart';
import 'package:turf/turf.dart';
class GeoMetadataLookup {
final String apiUrl;
final Directory cacheDir;
final double distanceThreshold;
final Distance distance = const Distance();
GeoMetadataLookup({
required this.apiUrl,
required this.cacheDir,
this.distanceThreshold = 10.0, // Default 10 meters
}) {
if (!cacheDir.existsSync()) {
cacheDir.createSync(recursive: true);
}
}
Future<List<Map<String, dynamic>>> lookup(double latitude, double longitude) async {
final String geohash = GeoHasher().encode(latitude, longitude, precision: 4);
final File cacheFile = File('${cacheDir.path}/$geohash.geojson.gz');
if (!cacheFile.existsSync()) {
await _downloadGeoJson(geohash, cacheFile);
}
final String geoJsonStr = utf8.decode(GZipCodec().decode(cacheFile.readAsBytesSync()));
final Map<String, dynamic> geoJson = jsonDecode(geoJsonStr);
return _findMetadata(latitude, longitude, geoJson);
}
Future<void> _downloadGeoJson(String geohash, File cacheFile) async {
final response = await http.get(Uri.parse('$apiUrl/$geohash.geojson.gz'));
if (response.statusCode == 200) {
cacheFile.writeAsBytesSync(GZipCodec().encode(response.bodyBytes));
} else {
throw Exception('Failed to download GeoJSON for geohash: $geohash');
}
}
List<Map<String, dynamic>> _findMetadata(double latitude, double longitude, Map<String, dynamic> geoJson) {
final Point point = Point(coordinates: Position(longitude, latitude));
List<Map<String, dynamic>> results = [];
for (var feature in geoJson['features']) {
final geometry = feature['geometry'];
final properties = feature['properties'] ?? {};
if (geometry['type'] == 'Polygon') {
final polygon = Polygon(
coordinates: (geometry['coordinates'] as List)
.map((ring) => (ring as List)
.map((p) => Position(p[0] as double, p[1] as double))
.toList())
.toList(),
);
}
else if (geometry['type'] == 'LineString') {
final line = LineString(coordinates: (geometry['coordinates'] as List).map((p) => Position(p[0], p[1])).toList());
if (_isPointNearLine(point, line)) {
results.add({'type': 'line', ...properties});
}
}
else if (geometry['type'] == 'MultiLineString') {
for (var lineCoords in geometry['coordinates']) {
final line = LineString(coordinates: lineCoords.map((p) => Position(p[0], p[1])).toList());
if (_isPointNearLine(point, line)) {
results.add({'type': 'multi_line', ...properties});
break;
}
}
}
}
return results;
}
bool _isPointNearLine(Point point, LineString line) {
for (var i = 0; i < line.coordinates.length - 1; i++) {
final p1 = line.coordinates[i];
final p2 = line.coordinates[i + 1];
final double dist = distance.distance(
LatLng(point.coordinates.lat.toDouble(), point.coordinates.lng.toDouble()),
LatLng(p1.lat.toDouble(), p1.lng.toDouble()),
);
if (dist <= distanceThreshold) return true;
}
return false;
}
}

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pubspec.lock Normal file
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# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
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dependency: transitive
description:
name: _fe_analyzer_shared
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source: hosted
version: "80.0.0"
analyzer:
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description:
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version: "7.3.0"
args:
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async:
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benchmark:
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version: "0.3.0"
boolean_selector:
dependency: transitive
description:
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url: "https://pub.dev"
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version: "2.1.2"
clock:
dependency: transitive
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url: "https://pub.dev"
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version: "1.1.2"
collection:
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convert:
dependency: transitive
description:
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source: hosted
version: "3.1.2"
coverage:
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description:
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url: "https://pub.dev"
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crypto:
dependency: transitive
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url: "https://pub.dev"
source: hosted
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dart_geohash:
dependency: "direct main"
description:
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url: "https://pub.dev"
source: hosted
version: "2.1.0"
dart_sort_queue:
dependency: transitive
description:
name: dart_sort_queue
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file:
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description:
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url: "https://pub.dev"
source: hosted
version: "7.0.1"
frontend_server_client:
dependency: transitive
description:
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url: "https://pub.dev"
source: hosted
version: "4.0.0"
geotypes:
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description:
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url: "https://pub.dev"
source: hosted
version: "0.0.2"
glob:
dependency: transitive
description:
name: glob
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url: "https://pub.dev"
source: hosted
version: "2.1.3"
http:
dependency: "direct main"
description:
name: http
sha256: fe7ab022b76f3034adc518fb6ea04a82387620e19977665ea18d30a1cf43442f
url: "https://pub.dev"
source: hosted
version: "1.3.0"
http_multi_server:
dependency: transitive
description:
name: http_multi_server
sha256: aa6199f908078bb1c5efb8d8638d4ae191aac11b311132c3ef48ce352fb52ef8
url: "https://pub.dev"
source: hosted
version: "3.2.2"
http_parser:
dependency: transitive
description:
name: http_parser
sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
url: "https://pub.dev"
source: hosted
version: "4.1.2"
intl:
dependency: transitive
description:
name: intl
sha256: "3df61194eb431efc39c4ceba583b95633a403f46c9fd341e550ce0bfa50e9aa5"
url: "https://pub.dev"
source: hosted
version: "0.20.2"
io:
dependency: transitive
description:
name: io
sha256: dfd5a80599cf0165756e3181807ed3e77daf6dd4137caaad72d0b7931597650b
url: "https://pub.dev"
source: hosted
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js:
dependency: transitive
description:
name: js
sha256: c1b2e9b5ea78c45e1a0788d29606ba27dc5f71f019f32ca5140f61ef071838cf
url: "https://pub.dev"
source: hosted
version: "0.7.1"
json_annotation:
dependency: transitive
description:
name: json_annotation
sha256: "1ce844379ca14835a50d2f019a3099f419082cfdd231cd86a142af94dd5c6bb1"
url: "https://pub.dev"
source: hosted
version: "4.9.0"
latlong2:
dependency: "direct main"
description:
name: latlong2
sha256: "98227922caf49e6056f91b6c56945ea1c7b166f28ffcd5fb8e72fc0b453cc8fe"
url: "https://pub.dev"
source: hosted
version: "0.9.1"
lints:
dependency: "direct dev"
description:
name: lints
sha256: c35bb79562d980e9a453fc715854e1ed39e24e7d0297a880ef54e17f9874a9d7
url: "https://pub.dev"
source: hosted
version: "5.1.1"
logging:
dependency: transitive
description:
name: logging
sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
url: "https://pub.dev"
source: hosted
version: "1.3.0"
matcher:
dependency: transitive
description:
name: matcher
sha256: dc58c723c3c24bf8d3e2d3ad3f2f9d7bd9cf43ec6feaa64181775e60190153f2
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meta:
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description:
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mime:
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description:
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url: "https://pub.dev"
source: hosted
version: "2.0.0"
node_preamble:
dependency: transitive
description:
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url: "https://pub.dev"
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package_config:
dependency: transitive
description:
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url: "https://pub.dev"
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path:
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pool:
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pub_semver:
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description:
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rbush:
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shelf:
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shelf_packages_handler:
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shelf_static:
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description:
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shelf_web_socket:
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description:
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source_map_stack_trace:
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source_maps:
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source_span:
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description:
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stack_trace:
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description:
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stream_channel:
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description:
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string_scanner:
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description:
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url: "https://pub.dev"
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version: "1.4.1"
sweepline_intersections:
dependency: transitive
description:
name: sweepline_intersections
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term_glyph:
dependency: transitive
description:
name: term_glyph
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test:
dependency: "direct dev"
description:
name: test
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test_api:
dependency: transitive
description:
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test_core:
dependency: transitive
description:
name: test_core
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turf:
dependency: "direct main"
description:
name: turf
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url: "https://pub.dev"
source: hosted
version: "0.0.10"
turf_equality:
dependency: transitive
description:
name: turf_equality
sha256: f0f44ffe389547941358e0d3d4a747db2bd56115b32ff1cede5e5bdf3126a3e2
url: "https://pub.dev"
source: hosted
version: "0.1.0"
turf_pip:
dependency: transitive
description:
name: turf_pip
sha256: ba4fd414baffd5d7b30880658ad6db82461c49ec023f8ffd0c23d398ad8b14be
url: "https://pub.dev"
source: hosted
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typed_data:
dependency: transitive
description:
name: typed_data
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url: "https://pub.dev"
source: hosted
version: "1.4.0"
vm_service:
dependency: transitive
description:
name: vm_service
sha256: ddfa8d30d89985b96407efce8acbdd124701f96741f2d981ca860662f1c0dc02
url: "https://pub.dev"
source: hosted
version: "15.0.0"
watcher:
dependency: transitive
description:
name: watcher
sha256: "69da27e49efa56a15f8afe8f4438c4ec02eff0a117df1b22ea4aad194fe1c104"
url: "https://pub.dev"
source: hosted
version: "1.1.1"
web:
dependency: transitive
description:
name: web
sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
url: "https://pub.dev"
source: hosted
version: "1.1.1"
web_socket:
dependency: transitive
description:
name: web_socket
sha256: "3c12d96c0c9a4eec095246debcea7b86c0324f22df69893d538fcc6f1b8cce83"
url: "https://pub.dev"
source: hosted
version: "0.1.6"
web_socket_channel:
dependency: transitive
description:
name: web_socket_channel
sha256: "0b8e2457400d8a859b7b2030786835a28a8e80836ef64402abef392ff4f1d0e5"
url: "https://pub.dev"
source: hosted
version: "3.0.2"
webkit_inspection_protocol:
dependency: transitive
description:
name: webkit_inspection_protocol
sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
url: "https://pub.dev"
source: hosted
version: "1.2.1"
yaml:
dependency: transitive
description:
name: yaml
sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
url: "https://pub.dev"
source: hosted
version: "3.1.3"
sdks:
dart: ">=3.6.0 <4.0.0"

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name: rugreefer
description: A sample command-line application.
version: 1.0.0
# repository: https://github.com/my_org/my_repo
environment:
sdk: ^3.6.0
# Add regular dependencies here.
dependencies:
dart_geohash: ^2.1.0
http: ^1.3.0
latlong2: ^0.9.1
turf: ^0.0.10
# path: ^1.8.0
dev_dependencies:
lints: ^5.0.0
test: ^1.24.0

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import 'package:rugreefer/rugreefer.dart'; // Ensure this import is correct
void main() {
print('Hello world!'); // Remove the missing method call
}