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randogoth 2025-02-02 09:39:55 +02:00
parent 23cbff14b7
commit d737e04f47
2 changed files with 171 additions and 18 deletions
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61
lib/src/whatfreewords_scrambler.dart
View file

@ -1,7 +1,7 @@
import 'dart:math';
import 'whatfreewords_cipher.dart';
Map<String, String> ilist =
final Map<String, String> ilist =
wlist.map((key, value) => MapEntry(value, key));
String f(String L, String R) {
@ -19,6 +19,11 @@ String f(String L, String R) {
"2807694315",
"8746293105"
];
if (x < 0 || x >= 10 || y < 0 || y >= 10) {
throw RangeError("Index out of bounds: x=$x, y=$y");
}
return block[y][x];
}
@ -26,10 +31,15 @@ String F(String L, String K) {
int x = int.parse(L);
int k = int.parse(K);
String temp = "${x * x * x * k * 3 + 23 * k * k * x * x * x + k * (x + k) + 3}";
temp = temp.padLeft(10, '0');
return temp.substring(4, 10);
}
String feistPass(String input, String k) {
assert(input.length == 12, "Input to feistPass must be 12 characters long");
String L = input.substring(0, 6);
String R = input.substring(6, 12);
String Rout = "";
@ -58,6 +68,12 @@ String unscrambler(String input) {
}
String coordToWords(List<double> coordinate) {
if (coordinate.length != 2 ||
coordinate[0] < -90 || coordinate[0] > 90 ||
coordinate[1] < -180 || coordinate[1] > 180) {
throw ArgumentError("Invalid coordinate values: $coordinate");
}
int lat = (coordinate[0] * 10000).round() + 900000;
int lon = (coordinate[1] * 10000).round() + 1800000;
@ -69,25 +85,46 @@ String coordToWords(List<double> coordinate) {
String latlonRest = scrambler(latStr.substring(1, 7) + lonStr.substring(1, 7));
lat = int.parse(lat0 + latlonRest.substring(0, 6));
lon = int.parse(lon0 + latlonRest.substring(6, 12));
lat = int.parse(lat0 + latlonRest.substring(0, 6).padRight(6, '0'));
lon = int.parse(lon0 + latlonRest.substring(6, 12).padRight(6, '0'));
String ind1 = lat.toString().substring(0, 5);
String ind2 = lon.toString().substring(0, 5);
String ind3 = "0" + lat.toString().substring(5, 7) + lon.toString().substring(5, 7);
String latString = lat.toString().padLeft(7, '0');
String lonString = lon.toString().padLeft(7, '0');
if (latString.length < 7 || lonString.length < 7) {
throw ArgumentError("Coordinate string lengths are incorrect: lat=$latString, lon=$lonString");
}
String ind1 = latString.substring(0, 5);
String ind2 = lonString.substring(0, 5);
String ind3 = "0" + latString.substring(5, 7) + lonString.substring(5, 7);
return "${wlist[ind1]}.${wlist[ind2]}.${wlist[ind3]}";
}
List<double> wordsToCoord(String words) {
List<String> word = words.split(".");
String ind1 = ilist[word[0]]!;
String ind2 = ilist[word[1]]!;
String ind3 = ilist[word[2]]!;
// Ensure exactly 3 words are provided and each exists in the dictionary
if (word.length != 3 || !ilist.containsKey(word[0]) || !ilist.containsKey(word[1]) || !ilist.containsKey(word[2])) {
throw ArgumentError("Invalid words format: $words");
}
String? ind1 = ilist[word[0]];
String? ind2 = ilist[word[1]];
String? ind3 = ilist[word[2]];
if (ind1 == null || ind2 == null || ind3 == null || ind3.length < 5) {
throw ArgumentError("Invalid word mapping for words: $words");
}
String lat = ind1 + ind3.substring(1, 3);
String lon = ind2 + ind3.substring(3, 5);
if (lat.length < 7 || lon.length < 7) {
throw ArgumentError("Malformed coordinate indices: lat=$lat, lon=$lon");
}
String latlonRest = lat.substring(1, 7) + lon.substring(1, 7);
latlonRest = unscrambler(latlonRest);
@ -97,9 +134,15 @@ List<double> wordsToCoord(String words) {
double latitude = (int.parse(lat) - 900000) / 10000.0;
double longitude = (int.parse(lon) - 1800000) / 10000.0;
// Additional validation: Ensure valid latitude/longitude range
if (latitude < -90 || latitude > 90 || longitude < -180 || longitude > 180) {
throw ArgumentError("Computed coordinates out of range: lat=$latitude, lon=$longitude");
}
return [latitude, longitude];
}
void main() {
List<double> coordinate = [51.50844113, -0.116708278];
String words = coordToWords(coordinate);

128
test/whatfreewords_test.dart
View file

@ -1,15 +1,125 @@
import 'package:whatfreewords/whatfreewords.dart';
import 'dart:math';
import 'package:test/test.dart';
import 'package:whatfreewords/whatfreewords.dart';
void main() {
test('Coordinate to Words and Back', () {
final List<double> coord = [51.50844113, -0.116708278];
final words = coordToWords(coord);
print(words);
final backToCoord = wordsToCoord(words);
print(backToCoord);
group('WhatFreeWords Tests', () {
test('Coordinate to Words and Back', () {
final List<double> coord = [51.50844113, -0.116708278];
final words = coordToWords(coord);
final backToCoord = wordsToCoord(words);
expect(backToCoord[0], closeTo(coord[0], 0.0001));
expect(backToCoord[1], closeTo(coord[1], 0.0001));
});
test('Edge Case: Maximum Latitude and Longitude', () {
final List<double> coord = [90.0, 180.0];
final words = coordToWords(coord);
final backToCoord = wordsToCoord(words);
expect(backToCoord[0], closeTo(coord[0], 0.0001));
expect(backToCoord[1], closeTo(coord[1], 0.0001));
});
test('Edge Case: Minimum Latitude and Longitude', () {
final List<double> coord = [-90.0, -180.0];
final words = coordToWords(coord);
final backToCoord = wordsToCoord(words);
expect(backToCoord[0], closeTo(coord[0], 0.0001));
expect(backToCoord[1], closeTo(coord[1], 0.0001));
});
test('Invalid Input: Out of Range Coordinates', () {
expect(() => coordToWords([100.0, 200.0]), throwsA(isA<ArgumentError>()));
expect(() => coordToWords([-100.0, -200.0]), throwsA(isA<ArgumentError>()));
});
test('Invalid Input: Malformed Words String', () {
expect(() => wordsToCoord("invalid.word.string"), throwsA(isA<ArgumentError>()));
});
test('Consistency Check: Multiple Calls Yield Same Result', () {
final List<double> coord = [34.0522, -118.2437];
final words1 = coordToWords(coord);
final words2 = coordToWords(coord);
expect(words1, equals(words2));
});
test('Inverse Mapping: Words Should Convert Back Accurately', () {
final List<double> coord = [37.7749, -122.4194];
final words = coordToWords(coord);
final backToCoord = wordsToCoord(words);
expect(backToCoord[0], closeTo(coord[0], 0.0001));
expect(backToCoord[1], closeTo(coord[1], 0.0001));
});
test('Randomized Coordinate Encoding and Decoding', () {
final Random rand = Random();
for (int i = 0; i < 100; i++) {
final double lat = -90 + rand.nextDouble() * 180;
final double lon = -180 + rand.nextDouble() * 360;
final words = coordToWords([lat, lon]);
final backToCoord = wordsToCoord(words);
expect(backToCoord[0], closeTo(lat, 0.0001));
expect(backToCoord[1], closeTo(lon, 0.0001));
}
});
test('Boundary Conditions', () {
final List<List<double>> validCoords = [
[-90.0, 0.0],
[90.0, 0.0],
[0.0, -180.0],
[0.0, 180.0]
];
for (var coord in validCoords) {
final words = coordToWords(coord);
final backToCoord = wordsToCoord(words);
expect(backToCoord[0], closeTo(coord[0], 0.0001));
expect(backToCoord[1], closeTo(coord[1], 0.0001));
}
final List<List<double>> invalidCoords = [
[-90.1, 0.0],
[90.1, 0.0],
[0.0, -180.1],
[0.0, 180.1]
];
for (var coord in invalidCoords) {
expect(() => coordToWords(coord), throwsA(isA<ArgumentError>()));
}
});
test('Minimum and Maximum Encodable Values', () {
final List<double> minCoord = [-89.9999, -179.9999];
final List<double> maxCoord = [89.9999, 179.9999];
final wordsMin = coordToWords(minCoord);
final wordsMax = coordToWords(maxCoord);
final backToCoordMin = wordsToCoord(wordsMin);
final backToCoordMax = wordsToCoord(wordsMax);
expect(backToCoordMin[0], closeTo(minCoord[0], 0.0001));
expect(backToCoordMin[1], closeTo(minCoord[1], 0.0001));
expect(backToCoordMax[0], closeTo(maxCoord[0], 0.0001));
expect(backToCoordMax[1], closeTo(maxCoord[1], 0.0001));
});
test('Invalid Word Combination', () {
expect(() => wordsToCoord("valid.valid.invalid"), throwsA(isA<ArgumentError>()));
expect(() => wordsToCoord("invalid.valid.valid"), throwsA(isA<ArgumentError>()));
expect(() => wordsToCoord("valid.invalid.valid"), throwsA(isA<ArgumentError>()));
});
expect(backToCoord[0], closeTo(coord[0], 0.0001));
expect(backToCoord[1], closeTo(coord[1], 0.0001));
});
}