Folder pictures, photo/video tile marks, folder in the viewer

Home rows and the folder header show the folder's round picture next to
its name. Post tiles carry a photo or video mark in the top left, on a
dark dot so it reads on bright thumbnails. The viewer shows the current
post's folder picture and name in the top left; pictures come from the
last loaded folder list, so before one loads only the name shows.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/app/src/main/java/mygram/droid/Api.java b/app/src/main/java/mygram/droid/Api.java
index f603b1b..c7d08eb 100644
--- a/app/src/main/java/mygram/droid/Api.java
+++ b/app/src/main/java/mygram/droid/Api.java
@@ -35,6 +35,7 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -46,6 +47,9 @@ final class Api {
 	static final ExecutorService IO = Executors.newFixedThreadPool(4);
 	private static final int TIMEOUT_MS = 15000;
 	private static final int PAGE = 60;
+	/** Folder slug to picture URL, filled by folders(); the viewer reads it. */
+	// ponytail: empty until a folder list has loaded once, so the viewer then shows the name alone.
+	static final Map<String, String> AVATARS = new ConcurrentHashMap<>();
 
 	private Api() {
 	}
@@ -161,6 +165,9 @@ final class Api {
 		List<Folder> out = new ArrayList<>();
 		for (int i = 0; i < items.length(); i++)
 			out.add(new Folder(items.getJSONObject(i), Prefs.server()));
+		for (Folder f : out)
+			if (f.avatarUrl != null)
+				AVATARS.put(f.slug, f.avatarUrl);
 		out.sort((a, b) -> Long.compare(b.latest, a.latest));
 		return out;
 	}