[Item] collect annotations by color(no sort)

[windingwind]

Author: @windingwind
Discuss: #49
Type: B

![175812654-0d2cf807-9967-4961-a4e8-00cad79893ab](https://user-images.githubusercontent.com/33902321/202897350-f8e7e1f2-1a9f-452a-ad5c-495612

bcaab6.png)

${await new Promise(async (r) => {
  async function getAnnotation(item) {
    try {
      if (!item || !item.isAnnotation()) {
        return null;
      }
      let json = await Zotero.Annotations.toJSON(item);
      json.id = item.key;
      delete json.key;
      for (let key in json) {
        json[key] = json[key] || "";
      }
      json.tags = json.tags || [];
      return json;
    } catch (e) {
      Zotero.logError(e);
      return null;
    }
  }

  async function getAnnotationsByColor(_item, color) {
    let annots = _item
      .getAnnotations()
    annots = color ? 
      annots.filter((_annot) => _annot.annotationColor === color) :
      annots;
    let annotations = [];
    for (let annot of annots) {
      const annotJson = await getAnnotation(annot);
      annotJson.attachmentItemID = _item.id;
      annotations.push(annotJson);
    }
    if (!editor) {
      alert("No active note editor detected. Please open workspace.");
      return r("");
    }
    await editor.importImages(annotations);
    return Zotero.EditorInstanceUtilities.serializeAnnotations(annotations);
  }

  const attachments = Zotero.Items.get(topItem.getAttachments()).filter((i) =>
    i.isPDFAttachment()
  );
  let res = "";
  for (let attachment of attachments) {
    res += `<h2>${attachment.getFilename()}</h2>
${(await getAnnotationsByColor(attachment)).html}`;
  }
  r(res);
})}