Merge pull request #4312 from crobibero/json-array-converter

Add comma delimited string to array json converter

1 files changed, 53 insertions, 0 deletions

diff --git a/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs b/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs
new file mode 100644
index 000000000..bf7048c37
--- /dev/null
+++ b/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs
@@ -0,0 +1,53 @@
+using System;
+using System.ComponentModel;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MediaBrowser.Common.Json.Converters
+{
+    /// <summary>
+    /// Convert comma delimited string to array of type.
+    /// </summary>
+    /// <typeparam name="T">Type to convert to.</typeparam>
+    public class JsonCommaDelimitedArrayConverter<T> : JsonConverter<T[]>
+    {
+        private readonly TypeConverter _typeConverter;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JsonCommaDelimitedArrayConverter{T}"/> class.
+        /// </summary>
+        public JsonCommaDelimitedArrayConverter()
+        {
+            _typeConverter = TypeDescriptor.GetConverter(typeof(T));
+        }
+
+        /// <inheritdoc />
+        public override T[] Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+            {
+                var stringEntries = reader.GetString()?.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+                if (stringEntries == null || stringEntries.Length == 0)
+                {
+                    return Array.Empty<T>();
+                }
+
+                var entries = new T[stringEntries.Length];
+                for (var i = 0; i < stringEntries.Length; i++)
+                {
+                    entries[i] = (T)_typeConverter.ConvertFrom(stringEntries[i].Trim());
+                }
+
+                return entries;
+            }
+
+            return JsonSerializer.Deserialize<T[]>(ref reader, options);
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, T[] value, JsonSerializerOptions options)
+        {
+            JsonSerializer.Serialize(writer, value, options);
+        }
+    }
+}
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