From 700dec88752c2772eca383ea5f60373f4f62eaac Mon Sep 17 00:00:00 2001
From: buttercat1791 <mjjurkoic@gmail.com>
Date: Sat, 28 Jun 2025 18:46:03 -0500
Subject: [PATCH] Proxy bookmark observers through `SveltePublicationTree`

---
 .../svelte_publication_tree.svelte.ts         | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/lib/components/publications/svelte_publication_tree.svelte.ts b/src/lib/components/publications/svelte_publication_tree.svelte.ts
index 9969ed7..0c1eefc 100644
--- a/src/lib/components/publications/svelte_publication_tree.svelte.ts
+++ b/src/lib/components/publications/svelte_publication_tree.svelte.ts
@@ -7,11 +7,13 @@ export class SveltePublicationTree {
 
   #publicationTree: PublicationTree;
   #nodeResolvedObservers: Array<(address: string) => void> = [];
+  #bookmarkMovedObservers: Array<(address: string) => void> = [];
 
   constructor(rootEvent: NDKEvent, ndk: NDK) {
     this.#publicationTree = new PublicationTree(rootEvent, ndk);
 
     this.#publicationTree.onNodeResolved(this.#handleNodeResolved);
+    this.#publicationTree.onBookmarkMoved(this.#handleBookmarkMoved);
   }
 
   // #region Proxied Public Methods
@@ -48,6 +50,14 @@ export class SveltePublicationTree {
     this.#nodeResolvedObservers.push(observer);
   }
 
+  /**
+   * Registers an observer function that is invoked whenever the bookmark is moved.
+   * @param observer The observer function.
+   */
+  onBookmarkMoved(observer: (address: string) => void) {
+    this.#bookmarkMovedObservers.push(observer);
+  }
+
   // #endregion
 
   // #region Proxied Async Iterator Methods
@@ -83,5 +93,19 @@ export class SveltePublicationTree {
     }
   }
 
+  /**
+   * Observer function that is invoked whenever the bookmark is moved on the publication tree.
+   * 
+   * @param address The address of the new bookmark.
+   * 
+   * This member is declared as an arrow function to ensure that the correct `this` context is
+   * used when the function is invoked in this class's constructor.
+   */
+  #handleBookmarkMoved = (address: string) => {
+    for (const observer of this.#bookmarkMovedObservers) {
+      observer(address);
+    }
+  }
+
   // #endregion
 }
\ No newline at end of file