Pixelfed places: a remote post's own place, shown and never federated again

A Note's `location` that is a Place with coordinates (Pixelfed sends
them as strings) is kept in the new Post.Place and shown as
Status.privapub.place {name, latitude, longitude, country}; an edit
replaces it. An Event's location stays its own `places`, and nothing
renders a place back out. Closes the INTEROP P2 Pixelfed location gap
and the ROADMAP long-tail item.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

PrivaPub/Federation/Inbox/RemoteEdits.cs

@@ -1,4 +1,4 @@
-using MongoDB.Entities;
+using MongoDB.Entities;
 
 using PrivaPub.Domain.Statuses;
 using PrivaPub.Federation.Actors;
@@ -33,6 +33,7 @@ namespace PrivaPub.Federation.Inbox
 			post.Video = note.Video ?? post.Video;
 			post.Audio = note.Audio ?? post.Audio;
 			post.Event = note.Event ?? post.Event;
+			post.Place = note.Place;
 			if (!IsEdit(note, post))
 			{
 				await DB.Default.SaveAsync(post, token);

PrivaPub/Federation/Inbox/RemotePosts.cs

@@ -1,4 +1,4 @@
-using MongoDB.Driver;
+using MongoDB.Driver;
 using MongoDB.Entities;
 
 using PrivaPub.Infrastructure.Http;
@@ -90,6 +90,7 @@ namespace PrivaPub.Federation.Inbox
 				Video = note.Video,
 				Audio = note.Audio,
 				Event = note.Event,
+				Place = note.Place,
 				HasContentWarning = note.Sensitive,
 				Text = note.ContentHtml,
 				ContentHtml = note.ContentHtml,

PrivaPub/Federation/Objects/NoteParser.cs

@@ -1,4 +1,4 @@
-using PrivaPub.Models.Post;
+using PrivaPub.Models.Post;
 
 using System.Globalization;
 using System.Text;
@@ -44,6 +44,7 @@ namespace PrivaPub.Federation.Objects
 		public VideoDetails Video { get; init; }
 		public AudioDetails Audio { get; init; }
 		public EventDetails Event { get; init; }
+		public PostPlace Place { get; init; }
 	}
 
 	public static class NoteParser
@@ -110,7 +111,8 @@ namespace PrivaPub.Federation.Objects
 				Link = ObjectShapes.Link(note),
 				Video = ObjectShapes.Video(note),
 				Audio = ObjectShapes.Audio(note),
-				Event = ObjectShapes.Event(note)
+				Event = ObjectShapes.Event(note),
+				Place = ObjectShapes.NotePlace(note)
 			};
 		}
 

PrivaPub/Federation/Objects/ObjectShapes.cs

@@ -1,4 +1,4 @@
-using PrivaPub.Models.Post;
+using PrivaPub.Models.Post;
 
 using System.Globalization;
 using System.Net;
@@ -293,6 +293,31 @@ namespace PrivaPub.Federation.Objects
 			};
 		}
 
+		//a post's own place, as Pixelfed sends it: a Place with coordinates (numbers, or numbers as strings); an Event's
+		//places are its own (Event)
+		public static PostPlace NotePlace(JsonObject note)
+		{
+			if (Value(note, "type") == "Event")
+				return default;
+			var place = Objects(note["location"]).FirstOrDefault(l => Value(l, "type") == "Place");
+			var latitude = Coordinate(place, "latitude");
+			var longitude = Coordinate(place, "longitude");
+			if (latitude is not (>= -90 and <= 90) || longitude is not (>= -180 and <= 180))
+				return default;
+			return new PostPlace
+			{
+				Name = Text(Value(place, "name"), 200),
+				Latitude = Math.Round(latitude.Value, 4),
+				Longitude = Math.Round(longitude.Value, 4),
+				Country = Text(Value(place, "country"), 100)
+			};
+		}
+
+		static double? Coordinate(JsonObject node, string property) =>
+			Double(node, property) ?? (double.TryParse(Value(node, property), NumberStyles.Float, CultureInfo.InvariantCulture, out var number) && double.IsFinite(number)
+				? number
+				: (double?)null);
+
 		static EventPlace Place(JsonObject location)
 		{
 			var type = Value(location, "type");