Initial commit

packages/cue-engine/package.json

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+{
+  "name": "@goodgrief/cue-engine",
+  "version": "0.1.0",
+  "type": "module",
+  "main": "./src/index.ts",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "dependencies": {
+    "@goodgrief/shared-types": "file:../shared-types"
+  }
+}

packages/cue-engine/src/index.ts

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+import type { Cue } from "@goodgrief/shared-types";
+
+export interface CueRuntimeState {
+  cueStack: Cue[];
+  currentCueId: string | null;
+  armedCueId: string | null;
+  previewCueId: string | null;
+  blackout: boolean;
+  safeSceneActive: boolean;
+}
+
+export const createCueRuntimeState = (cueStack: Cue[]): CueRuntimeState => ({
+  cueStack: [...cueStack].sort((left, right) => left.orderIndex - right.orderIndex),
+  currentCueId: null,
+  armedCueId: cueStack[0]?.id ?? null,
+  previewCueId: cueStack[0]?.id ?? null,
+  blackout: false,
+  safeSceneActive: false
+});
+
+export const armCue = (state: CueRuntimeState, cueId: string): CueRuntimeState => ({
+  ...state,
+  armedCueId: cueId,
+  previewCueId: cueId
+});
+
+export const takeCue = (state: CueRuntimeState): CueRuntimeState => {
+  if (!state.armedCueId) {
+    return state;
+  }
+
+  const currentIndex = state.cueStack.findIndex((cue) => cue.id === state.armedCueId);
+  const nextCue = state.cueStack[currentIndex + 1] ?? null;
+
+  return {
+    ...state,
+    currentCueId: state.armedCueId,
+    armedCueId: nextCue?.id ?? null,
+    previewCueId: nextCue?.id ?? null,
+    blackout: false,
+    safeSceneActive: false
+  };
+};
+
+export const triggerBlackout = (state: CueRuntimeState): CueRuntimeState => ({
+  ...state,
+  blackout: true
+});
+
+export const triggerSafeScene = (state: CueRuntimeState, cueId: string): CueRuntimeState => ({
+  ...state,
+  currentCueId: cueId,
+  previewCueId: cueId,
+  safeSceneActive: true,
+  blackout: false
+});
+
+export const skipToCue = (state: CueRuntimeState, cueId: string): CueRuntimeState => ({
+  ...state,
+  armedCueId: cueId,
+  previewCueId: cueId
+});

packages/cue-engine/tsconfig.json

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+{
+  "extends": "../../tsconfig.base.json",
+  "include": [
+    "src"
+  ]
+}