feat(commands): add image asset layer commands

commands/document.ts

@@ -1,3 +1,5 @@
+import type { Asset } from "@core/asset";
+import type { ImageLayer } from "@core/image-layer";
 import type { Rect } from "@core/geometry";
 import type { ArtboardId } from "@core/id";
 import type { Command } from "./command";
@@ -14,6 +16,15 @@ export type DocumentSetArtboardBoundsPayload = {
   bounds: Rect;
 };
 
+export type DocumentAddAssetPayload = {
+  asset: Asset;
+};
+
+export type DocumentAddImageLayerPayload = {
+  artboardId: ArtboardId;
+  layer: ImageLayer;
+};
+
 export const documentAddArtboardCommand: Command<DocumentAddArtboardPayload> = {
   id: commandIds.documentAddArtboard,
   name: "Add artboard",
@@ -53,4 +64,41 @@ export const documentSetArtboardBoundsCommand: Command<DocumentSetArtboardBounds
   },
 };
 
-export const documentCommands = [documentAddArtboardCommand, documentSetArtboardBoundsCommand] satisfies Command<unknown>[];
+export const documentAddAssetCommand: Command<DocumentAddAssetPayload> = {
+  id: commandIds.documentAddAsset,
+  name: "Add asset",
+  execute({ state }, payload) {
+    if (state.document.assets.some((asset) => asset.id === payload.asset.id)) return state;
+
+    return {
+      ...state,
+      document: {
+        ...state.document,
+        assets: [...state.document.assets, payload.asset],
+      },
+    };
+  },
+};
+
+export const documentAddImageLayerCommand: Command<DocumentAddImageLayerPayload> = {
+  id: commandIds.documentAddImageLayer,
+  name: "Add image layer",
+  execute({ state }, payload) {
+    return {
+      ...state,
+      document: {
+        ...state.document,
+        artboards: state.document.artboards.map((artboard) =>
+          artboard.id === payload.artboardId ? { ...artboard, layers: [...artboard.layers, payload.layer] } : artboard,
+        ),
+      },
+    };
+  },
+};
+
+export const documentCommands = [
+  documentAddArtboardCommand,
+  documentSetArtboardBoundsCommand,
+  documentAddAssetCommand,
+  documentAddImageLayerCommand,
+] satisfies Command<unknown>[];