From 6b83782bd73df0b3aeef12896ff0e17acc4d3b0b Mon Sep 17 00:00:00 2001
From: William Gorge <william.gorge@linkurio.us>
Date: Tue, 25 Nov 2025 09:10:23 +0100
Subject: [PATCH 1/2] LKE-13676 fix(thumbnails): have coherent thumbnails

---
 src/api/Visualization/types.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/api/Visualization/types.ts b/src/api/Visualization/types.ts
index 84501d6f..8458cfd3 100644
--- a/src/api/Visualization/types.ts
+++ b/src/api/Visualization/types.ts
@@ -147,6 +147,10 @@ export interface IVisualizationTimeline {
   zoomLevel?: ZoomLevel;
 }
 
+export interface VisualizationThumbnailData {
+  svg: string;
+}
+
 export interface BaseVisualization {
   nodes: IVizNodeInfo[];
   nodeGroups?: IVizNodeGroupInfo[];
@@ -218,6 +222,7 @@ export interface ICreateVisualizationParams extends IDataSourceParams {
   timeline?: IVisualizationTimeline;
   layout?: VisualizationLayout;
   geo?: IVisualizationGeo;
+  thumbnail?: VisualizationThumbnailData;
 }
 
 export interface IDuplicateVisualizationParams extends IDataSourceParams {
@@ -254,6 +259,7 @@ export interface SharedVisualization {
   locked: boolean;
   lastLockedByUser: Pick<User, 'username' | 'email'>;
   lastEditedByUser: Pick<User, 'username' | 'email'>;
+  thumbnail?: VisualizationThumbnailData;
 }
 
 export type GetSharedVisualizationsResponse = SharedVisualization[];
@@ -291,6 +297,7 @@ export interface VisualizationTreeItem {
   lastLockedByUser: Pick<User, 'username' | 'email'>;
   lastEditedByUser: Pick<User, 'username' | 'email'>;
   locked: boolean;
+  thumbnail?: VisualizationThumbnailData;
 }
 
 export type VisualizationTree = Tree<VisualizationTreeItem, 'visu'>;

From 8d3d4d24003f7fea3389e18ddde995ebe49889a1 Mon Sep 17 00:00:00 2001
From: William Gorge <william.gorge@linkurio.us>
Date: Thu, 27 Nov 2025 15:28:34 +0100
Subject: [PATCH 2/2] LKE-13676 fix: limit thumbnail size

---
 src/api/Visualization/types.ts | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/api/Visualization/types.ts b/src/api/Visualization/types.ts
index 8458cfd3..0030d01e 100644
--- a/src/api/Visualization/types.ts
+++ b/src/api/Visualization/types.ts
@@ -148,7 +148,17 @@ export interface IVisualizationTimeline {
 }
 
 export interface VisualizationThumbnailData {
-  svg: string;
+  svg: string; // Should not exceed a certain size, cf isThumbnailTooLarge
+}
+
+export const MAX_VISUALIZATION_THUMBNAIL_SIZE_BYTES = 2_097_152; // 2MB
+
+export function isThumbnailTooLarge(
+  thumbnail: VisualizationThumbnailData | null | undefined
+): boolean {
+  const thumbnailContent = thumbnail?.svg ?? '';
+  const thumbnailSizeBytes = new TextEncoder().encode(thumbnailContent).byteLength;
+  return thumbnailSizeBytes > MAX_VISUALIZATION_THUMBNAIL_SIZE_BYTES;
 }
 
 export interface BaseVisualization {
@@ -222,7 +232,7 @@ export interface ICreateVisualizationParams extends IDataSourceParams {
   timeline?: IVisualizationTimeline;
   layout?: VisualizationLayout;
   geo?: IVisualizationGeo;
-  thumbnail?: VisualizationThumbnailData;
+  thumbnail?: VisualizationThumbnailData | null; // Set explicitly to null to remove an existing thumbnail
 }
 
 export interface IDuplicateVisualizationParams extends IDataSourceParams {