stack_wallet/lib/utilities/extensions/impl/gradient.dart

import 'package:flutter/material.dart';
import 'package:stackwallet/utilities/extensions/impl/string.dart';

// todo: delete this map (example)
final map = {
  "name": "Dark",
  "coinColors": {
    "bitcoin": "0xFF267352",
  },
  "assets": {
    "circleLock": "svg/somerandomnamecreatedbythemecreator.svg",
  },
  "colors": {
    "background": "0xFF848383",
  },
  "gradients": {
    "gradientBackground": {
      "gradientType": "linear",
      "begin": {
        "x": 0.0,
        "y": 1.0,
      },
      "end": {
        "x": -1.0,
        "y": 1.0,
      },
      "colors": [
        "0xFF638227",
        "0xFF632827",
      ]
    }
  }
};

extension GradientExt on Gradient {
  static Gradient fromJson(Map<String, dynamic> json) {
    print("THIS GRADIENTS IS ${json.isEmpty}");
    if (!json.isEmpty) {
      switch (json["background"]["type"]) {
        case "Linear":
          final colorStrings =
              List<String>.from(json["background"]["colors"] as List);
          return LinearGradient(
            begin: Alignment(
              json["background"]["begin"]["x"] as double,
              json["background"]["begin"]["y"] as double,
            ),
            end: Alignment(
              json["background"]["end"]["x"] as double,
              json["background"]["end"]["y"] as double,
            ),
            colors: colorStrings
                .map(
                  (e) => Color(
                    e.toBigIntFromHex.toInt(),
                  ),
                )
                .toList(),
          );

        default:
          throw ArgumentError("Invalid json gradient: $json");
      }
    }
    throw ArgumentError("Invalid json gradient: $json");
    // if ()
  }
}