ComfyUI_frontend/src/extensions/core/uploadAudio.ts

import { app } from "../../scripts/app";
import { api } from "../../scripts/api";
import type { IWidget } from "/types/litegraph";
import type { DOMWidget } from "/scripts/domWidget";

type FolderType = "input" | "output" | "temp";

function splitFilePath(path: string): [string, string] {
  const folder_separator = path.lastIndexOf("/");
  if (folder_separator === -1) {
    return ["", path];
  }
  return [path.substring(0, folder_separator), path.substring(folder_separator + 1)];
}

function getResourceURL(subfolder: string, filename: string, type: FolderType = "input"): string {
  const params = [
    "filename=" + encodeURIComponent(filename),
    "type=" + type,
    "subfolder=" + subfolder,
    app.getPreviewFormatParam().substring(1),
    app.getRandParam().substring(1),
  ].join("&");

  return `/view?${params}`;
}

async function uploadFile(
  audioWidget: IWidget,
  audioUIWidget: DOMWidget<HTMLAudioElement>,
  file: File,
  updateNode: boolean,
  pasted: boolean = false
) {
  try {
    // Wrap file in formdata so it includes filename
    const body = new FormData();
    body.append("image", file);
    if (pasted) body.append("subfolder", "pasted");
    const resp = await api.fetchApi("/upload/image", {
      method: "POST",
      body,
    });

    if (resp.status === 200) {
      const data = await resp.json();
      // Add the file to the dropdown list and update the widget value
      let path = data.name;
      if (data.subfolder) path = data.subfolder + "/" + path;

      if (!audioWidget.options.values.includes(path)) {
        audioWidget.options.values.push(path);
      }

      if (updateNode) {
        audioUIWidget.element.src = api.apiURL(getResourceURL(...splitFilePath(path)));
        audioWidget.value = path;
      }
    } else {
      alert(resp.status + " - " + resp.statusText);
    }
  } catch (error) {
    alert(error);
  }
}

// AudioWidget MUST be registered first, as AUDIOUPLOAD depends on AUDIO_UI to be
// present.
app.registerExtension({
  name: "Comfy.AudioWidget",
  async beforeRegisterNodeDef(nodeType, nodeData) {
    if (["LoadAudio", "SaveAudio"].includes(nodeType.comfyClass)) {
      nodeData.input.required.audioUI = ["AUDIO_UI"];
    }
  },
  getCustomWidgets() {
    return {
      AUDIO_UI(node, inputName: string) {
        const audio = document.createElement("audio");
        audio.controls = true;
        audio.classList.add("comfy-audio");
        audio.setAttribute("name", "media");

        const audioUIWidget: DOMWidget<HTMLAudioElement> = node.addDOMWidget(inputName, /* name=*/ "audioUI", audio);
        // @ts-ignore
        // TODO: Sort out the DOMWidget type.
        audioUIWidget.serialize = false;

        const isOutputNode = node.constructor.nodeData.output_node;
        if (isOutputNode) {
          // Hide the audio widget when there is no audio initially.
          audioUIWidget.element.classList.add("empty-audio-widget");
          // Populate the audio widget UI on node execution.
          const onExecuted = node.onExecuted;
          node.onExecuted = function (message) {
            onExecuted?.apply(this, arguments);
            const audios = message.audio;
            if (!audios) return;
            const audio = audios[0];
            audioUIWidget.element.src = api.apiURL(getResourceURL(audio.subfolder, audio.filename, "output"));
            audioUIWidget.element.classList.remove("empty-audio-widget");
          }
        }
        return { widget: audioUIWidget };
      }
    }
  },
  onNodeOutputsUpdated(nodeOutputs: Record<number, any>) {
    for (const [nodeId, output] of Object.entries(nodeOutputs)) {
      const node = app.graph.getNodeById(Number.parseInt(nodeId));
      if ("audio" in output) {
        const audioUIWidget = node.widgets.find((w) => w.name === "audioUI") as unknown as DOMWidget<HTMLAudioElement>;
        const audio = output.audio[0];
        audioUIWidget.element.src = api.apiURL(getResourceURL(audio.subfolder, audio.filename, "output"));
        audioUIWidget.element.classList.remove("empty-audio-widget");
      }
    }
  },
});

app.registerExtension({
  name: "Comfy.UploadAudio",
  async beforeRegisterNodeDef(nodeType, nodeData) {
    if (nodeData?.input?.required?.audio?.[1]?.audio_upload === true) {
      nodeData.input.required.upload = ["AUDIOUPLOAD"];
    }
  },
  getCustomWidgets() {
    return {
      AUDIOUPLOAD(node, inputName: string) {
        // The widget that allows user to select file.
        const audioWidget: IWidget = node.widgets.find((w: IWidget) => w.name === "audio");
        const audioUIWidget: DOMWidget<HTMLAudioElement> = node.widgets.find((w: IWidget) => w.name === "audioUI");

        const onAudioWidgetUpdate = () => {
          audioUIWidget.element.src = api.apiURL(getResourceURL(...splitFilePath(audioWidget.value)));
        };
        // Initially load default audio file to audioUIWidget.
        if (audioWidget.value) {
          onAudioWidgetUpdate();
        }
        audioWidget.callback = onAudioWidgetUpdate;

        const fileInput = document.createElement("input");
        fileInput.type = "file";
        fileInput.accept = "audio/*";
        fileInput.style.display = "none";
        fileInput.onchange = () => {
          if (fileInput.files.length) {
            uploadFile(audioWidget, audioUIWidget, fileInput.files[0], true);
          }
        };
        // The widget to pop up the upload dialog.
        const uploadWidget = node.addWidget("button", inputName, /* value=*/"", () => {
          fileInput.click();
        });
        uploadWidget.label = "choose file to upload";
        uploadWidget.serialize = false;

        return { widget: uploadWidget };
      }
    }
  },
});