import MessageContent from "./messageContent";
import MessageContentType from "./messageContentType";
import wfc from "../client/wfc";

export default class LinkMessageContent extends MessageContent {
  title;
  contentDigest;
  url;
  thumbnail;

  constructor() {
    super(MessageContentType.Link);
  }

  encode() {
    let payload = super.encode();
    let obj = {
      d: this.contentDigest,
      u: this.url,
      t: this.thumbnail,
    };

    payload.searchableContent = this.title;
    payload.binaryContent = wfc.utf8_to_b64(JSON.stringify(obj));

    return payload;
  }

  decode(payload) {
    super.decode(payload);
    this.title = payload.searchableContent;
    let obj = JSON.parse(wfc.b64_to_utf8(payload.binaryContent));
    this.contentDigest = obj.d;
    this.url = obj.u;
    this.thumbnail = obj.t;
  }

  digest(message) {
    let tmp = this.title ? this.title.trim() : this.contentDigest ? this.contentDigest.trim() : null;
    return tmp ? tmp : this.url;
  }
}