feat(commands): add selection commands

commands/selection.ts

@@ -0,0 +1,63 @@
+import type { ArtboardId, LayerId } from "@core/id";
+import type { Command } from "./command";
+
+export type SelectionSetPayload = {
+  artboardId?: ArtboardId;
+  layerIds: LayerId[];
+};
+
+export type SelectionAddLayerPayload = {
+  layerId: LayerId;
+};
+
+export const selectionSetCommand: Command<SelectionSetPayload> = {
+  id: "selection.set",
+  name: "Set selection",
+  execute({ state }, payload) {
+    return {
+      ...state,
+      editor: {
+        ...state.editor,
+        selection: {
+          artboardId: payload.artboardId,
+          layerIds: [...payload.layerIds],
+        },
+      },
+    };
+  },
+};
+
+export const selectionClearCommand: Command = {
+  id: "selection.clear",
+  name: "Clear selection",
+  execute({ state }) {
+    return {
+      ...state,
+      editor: {
+        ...state.editor,
+        selection: { layerIds: [] },
+      },
+    };
+  },
+};
+
+export const selectionAddLayerCommand: Command<SelectionAddLayerPayload> = {
+  id: "selection.addLayer",
+  name: "Add layer to selection",
+  execute({ state }, payload) {
+    if (state.editor.selection.layerIds.includes(payload.layerId)) return state;
+
+    return {
+      ...state,
+      editor: {
+        ...state.editor,
+        selection: {
+          ...state.editor.selection,
+          layerIds: [...state.editor.selection.layerIds, payload.layerId],
+        },
+      },
+    };
+  },
+};
+
+export const selectionCommands = [selectionSetCommand, selectionClearCommand, selectionAddLayerCommand] satisfies Command<unknown>[];