48 lines
1.4 KiB
C#
48 lines
1.4 KiB
C#
 
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using PrivaPub.Infrastructure.Statistics;
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using System.Text.Json.Nodes;
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using static PrivaPub.Federation.Objects.ActivityJson;
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namespace PrivaPub.Federation.Objects
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{
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public sealed record ActivityShape(string Type, string ObjectType, string Audience)
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{
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public static ActivityShape Of(JsonNode activity)
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{
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var embedded = activity?["object"] as JsonObject;
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return new ActivityShape(Value(activity, "type"), Value(embedded, "type"), AudienceOf(activity));
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}
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public static ActivityShape Of(string json)
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{
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try
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{
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return Of(JsonNode.Parse(json));
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}
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catch (System.Text.Json.JsonException)
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{
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return new ActivityShape(default, default, default);
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}
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}
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static string AudienceOf(JsonNode activity)
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{
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var source = activity?["to"] != default || activity?["cc"] != default ? activity : activity?["object"] as JsonObject;
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var to = Addresses(source?["to"]);
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var cc = Addresses(source?["cc"]);
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if (to.Any(Addressing.IsPublic))
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return Interactions.Public;
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if (cc.Any(Addressing.IsPublic))
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return Interactions.Unlisted;
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return to.Count + cc.Count == 0 ? Interactions.None : Interactions.Private;
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}
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static List<string> Addresses(JsonNode node) => node switch
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{
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JsonArray array => array.Select(Id).Where(id => id != default).ToList(),
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JsonNode single when Id(single) is { } id => new List<string> { id },
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_ => new List<string>()
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};
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}
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}
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