removing dev branch, many changes

2023-05-29 19:24:57 +00:00
parent 1430f3f656
commit 0a890c8707
250 changed files with 18084 additions and 8040 deletions
--- a/veilid-flutter/lib/veilid_encoding.dart
+++ b/veilid-flutter/lib/veilid_encoding.dart
@@ -0,0 +1,122 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+String base64UrlNoPadEncode(List<int> bytes) {
+  var x = base64Url.encode(bytes);
+  while (x.endsWith('=')) {
+    x = x.substring(0, x.length - 1);
+  }
+  return x;
+}
+
+Uint8List base64UrlNoPadDecode(String source) {
+  source = base64.normalize(source);
+  return base64.decode(source);
+}
+
+Uint8List base64UrlNoPadDecodeDynamic(dynamic source) {
+  source = source as String;
+  source = base64.normalize(source);
+  return base64.decode(source);
+}
+
+abstract class EncodedString {
+  late String contents;
+  EncodedString(String s) {
+    validate(s);
+    contents = s;
+  }
+  EncodedString.encode(List<int> b) {
+    var s = base64UrlNoPadEncode(b);
+    validate(s);
+    contents = s;
+  }
+
+  int encodedLength();
+  int decodedLength();
+  void validate(String s) {
+    var d = base64UrlNoPadDecode(s);
+    if (d.length != decodedLength()) {
+      throw Exception("length ${s.length} should be ${encodedLength()}");
+    }
+  }
+
+  Uint8List decode() {
+    return base64UrlNoPadDecode(contents);
+  }
+
+  @override
+  String toString() {
+    return contents;
+  }
+
+  static T fromString<T extends EncodedString>(String s) {
+    switch (T) {
+      case FixedEncodedString32:
+        return FixedEncodedString32(s) as T;
+      case FixedEncodedString43:
+        return FixedEncodedString43(s) as T;
+      case FixedEncodedString86:
+        return FixedEncodedString86(s) as T;
+      default:
+        throw UnimplementedError();
+    }
+  }
+}
+
+class FixedEncodedString32 extends EncodedString {
+  FixedEncodedString32(String s) : super(s);
+  @override
+  int encodedLength() {
+    return 32;
+  }
+
+  @override
+  int decodedLength() {
+    return 24;
+  }
+
+  String toJson() {
+    return toString();
+  }
+
+  FixedEncodedString32.fromJson(dynamic json) : this(json as String);
+}
+
+class FixedEncodedString43 extends EncodedString {
+  FixedEncodedString43(String s) : super(s);
+  @override
+  int encodedLength() {
+    return 43;
+  }
+
+  @override
+  int decodedLength() {
+    return 32;
+  }
+
+  String toJson() {
+    return toString();
+  }
+
+  FixedEncodedString43.fromJson(dynamic json) : this(json as String);
+}
+
+class FixedEncodedString86 extends EncodedString {
+  FixedEncodedString86(String s) : super(s);
+  @override
+  int encodedLength() {
+    return 86;
+  }
+
+  @override
+  int decodedLength() {
+    return 64;
+  }
+
+  String toJson() {
+    return toString();
+  }
+
+  FixedEncodedString86.fromJson(dynamic json) : this(json as String);
+}