flatrender/server/nexrender-job-builder.ts

import type { RenderScene, RenderSettings } from "../src/lib/render-schemas";
import { RESOLUTION_DIMENSIONS } from "../src/lib/render-schemas";

export interface NexrenderAsset {
  type: string;
  layerName?: string;
  composition?: string;
  property?: string;
  value?: string | number;
  src?: string;
  width?: number;
  height?: number;
  time?: number;
  [key: string]: unknown;
}

export interface NexrenderJob {
  template: {
    src: string;
    composition: string;
    frameStart?: number;
    frameEnd?: number;
  };
  assets: NexrenderAsset[];
  actions?: {
    postrender?: Array<Record<string, unknown>>;
  };
  onRenderProgress?: string;
  metadata?: Record<string, unknown>;
}

function layerToAsset(
  layer: RenderScene["layers"][number],
  scene: RenderScene,
  sceneIndex: number
): NexrenderAsset | null {
  const time = sceneIndex * scene.duration;

  switch (layer.type) {
    case "text": {
      const text =
        typeof layer.props.text === "string" ? layer.props.text : "Text";
      return {
        type: "data",
        layerName: `Scene${sceneIndex + 1}_Text`,
        composition: scene.name,
        property: "Source Text",
        value: text,
        time,
      };
    }
    case "image": {
      const src = typeof layer.props.src === "string" ? layer.props.src : "";
      if (!src) return null;
      return {
        type: "image",
        layerName: `Scene${sceneIndex + 1}_Image`,
        composition: scene.name,
        src,
        width: layer.width,
        height: layer.height,
        time,
      };
    }
    case "video": {
      const src = typeof layer.props.src === "string" ? layer.props.src : "";
      if (!src) return null;
      return {
        type: "video",
        layerName: `Scene${sceneIndex + 1}_Video`,
        composition: scene.name,
        src,
        time,
      };
    }
    case "shape":
      return {
        type: "data",
        layerName: `Scene${sceneIndex + 1}_Shape`,
        composition: scene.name,
        property: "Opacity",
        value: Math.round(layer.opacity * 100),
        time,
      };
    default:
      return null;
  }
}

export function buildNexrenderJob(
  scenes: RenderScene[],
  settings: RenderSettings,
  jobId: string,
  outputPath: string
): NexrenderJob {
  const templateSrc =
    process.env.NEXRENDER_TEMPLATE_SRC ??
    "file:///templates/creatorstudio-base.aep";
  const composition =
    process.env.NEXRENDER_COMPOSITION ?? "CreatorStudio_Main";

  const { width, height } = RESOLUTION_DIMENSIONS[settings.resolution];
  const totalDuration = scenes.reduce((sum, scene) => sum + scene.duration, 0);
  const frameEnd = Math.ceil(totalDuration * settings.fps);

  const assets: NexrenderAsset[] = [
    {
      type: "data",
      layerName: "Settings",
      composition,
      property: "Width",
      value: width,
    },
    {
      type: "data",
      layerName: "Settings",
      composition,
      property: "Height",
      value: height,
    },
    {
      type: "data",
      layerName: "Settings",
      composition,
      property: "Frame Rate",
      value: settings.fps,
    },
  ];

  scenes.forEach((scene, sceneIndex) => {
    assets.push({
      type: "data",
      layerName: `Scene${sceneIndex + 1}`,
      composition,
      property: "Duration",
      value: scene.duration,
      time: sceneIndex * scene.duration,
    });

    const sortedLayers = [...scene.layers].sort(
      (a, b) => a.zIndex - b.zIndex
    );

    sortedLayers.forEach((layer) => {
      const asset = layerToAsset(layer, scene, sceneIndex);
      if (asset) assets.push(asset);
    });
  });

  return {
    template: {
      src: templateSrc,
      composition,
      frameStart: 0,
      frameEnd,
    },
    assets,
    actions: {
      postrender: [
        {
          module: "@nexrender/action-copy",
          output: outputPath,
        },
      ],
    },
    metadata: {
      jobId,
      resolution: settings.resolution,
      fps: settings.fps,
      format: settings.format,
    },
  };
}