Adds a JsonConverter to parse the special JSONN format of the card price information

JpnCardsPokemon.Sdk/Utils/JsonConverter/CardPriceConverter.cs

@@ -0,0 +1,109 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using JpnCardsPokemon.Sdk.Api;
+
+namespace JpnCardsPokemon.Sdk.Utils.JsonConverter;
+
+internal class CardPriceConverter : JsonConverter<IEnumerable<CardPrice>>
+{
+    public override IEnumerable<CardPrice>? Read(ref Utf8JsonReader reader, Type typeToConvert,
+        JsonSerializerOptions options)
+    {
+        var resultBucket = new List<CardPrice>();
+
+        // read sellers
+        while (reader.Read())
+        {
+            // Finished parsing?
+            if (reader.TokenType == JsonTokenType.EndArray)
+                break;
+
+
+            if (reader.TokenType != JsonTokenType.PropertyName) continue;
+            var sellerName = reader.GetString();
+
+            // Versions
+            while (reader.Read())
+            {
+                if (reader.TokenType == JsonTokenType.EndArray)
+                    break;
+
+                // Version, usually "Regular"
+                if (reader.TokenType != JsonTokenType.PropertyName) continue;
+                var cardVersion = reader.GetString();
+
+                // Conditions
+                while (reader.Read())
+                {
+                    if (reader.TokenType == JsonTokenType.EndObject) break;
+
+                    if (reader.TokenType != JsonTokenType.PropertyName) continue;
+                    var condition = reader.GetString();
+
+                    var cardPrice = new CardPrice
+                    {
+                        Seller = sellerName,
+                        Version = cardVersion,
+                        Condition = condition
+                    };
+
+                    var propertyName = string.Empty;
+                    // Final price properties
+                    while (reader.Read())
+                    {
+                        if (reader.TokenType == JsonTokenType.EndObject) break;
+
+
+                        if (reader.TokenType == JsonTokenType.PropertyName)
+                        {
+                            propertyName = reader.GetString();
+                        }
+                        else
+                        {
+                            // search correct property in object
+                            if (string.IsNullOrEmpty(propertyName)) continue;
+
+                            var property = cardPrice.GetType().GetProperty(propertyName) ?? cardPrice
+                                .GetType().GetProperties().FirstOrDefault(p =>
+                                    p.GetCustomAttributes(typeof(JsonPropertyNameAttribute), true)
+                                        .Cast<JsonPropertyNameAttribute>()
+                                        .Any(a => a.Name.Equals(propertyName,
+                                            StringComparison.InvariantCultureIgnoreCase)));
+                            if (property != null)
+                            {
+                                object? value = null;
+                                var propertyType = property.PropertyType;
+
+                                if (propertyType == typeof(string))
+                                    value = reader.GetString();
+                                else if (propertyType == typeof(decimal))
+                                    value = reader.GetDecimal();
+                                else if (propertyType == typeof(DateTime))
+                                    if (DateTime.TryParse(reader.GetString(), out var dt))
+                                        value = dt;
+
+                                property.SetValue(cardPrice, value);
+                            }
+
+                            propertyName = string.Empty;
+                        }
+                    }
+
+                    // add card to bucket
+                    resultBucket.Add(cardPrice);
+                }
+            }
+        }
+
+
+        return resultBucket;
+    }
+
+    public override void Write(Utf8JsonWriter writer, IEnumerable<CardPrice> value, JsonSerializerOptions options)
+    {
+        throw new NotImplementedException();
+    }
+}