@talkjs/react-native/lib/module/Handlers.js

Official TalkJS SDK for React Native

"use strict";

import { CONVERSATION_LIST, SELECT_CONVERSATION_EVENT } from './constants';
import { Subscription } from './EventSubscription';
export class TalkHandlers {
  #subscriptions;
  #handlers;
  #onSelectConversationSubscription;
  #injectJavaScript;
  constructor(injectJavaScript) {
    this.#handlers = {};
    this.#subscriptions = {};
    this.#injectJavaScript = injectJavaScript;
  }
  off(event) {
    const subscription = this.#subscriptions[event];
    if (subscription) {
      subscription.unsubscribe();
    }
  }
  add(event, object, handler) {
    const subscription = new Subscription(this.#injectJavaScript);
    this.#subscriptions[event] = subscription;
    const variableName = subscription._variableName;
    this.#handlers[variableName] = handler;
    this.#injectJavaScript(`
      ${variableName} = ${object}.${event}(
        (eventObj) =>
          sendToReactNative("${event}", {id: "${variableName}", eventObj})
      );
      true;
      `);
    return subscription;
  }
  addOnSelectConversation(handler) {
    this.#onSelectConversationSubscription?.unsubscribe();
    this.#onSelectConversationSubscription = new Subscription(this.#injectJavaScript);
    const variableName = this.#onSelectConversationSubscription._variableName;
    this.#handlers[variableName] = handler;
    this.#injectJavaScript(`
      ${variableName} = ${CONVERSATION_LIST}.onSelectConversation((eventObj) => {
        eventObj.preventDefault();

        // Deselect the selected conversation.
        ${CONVERSATION_LIST}.select(null);
        sendToReactNative(
          '${SELECT_CONVERSATION_EVENT}', {id: "${variableName}", eventObj}
        );
      });
      true;
    `);
  }
  process(data) {
    const {
      id,
      eventObj
    } = data;
    this.#handlers[id](eventObj);
  }
}
export class CustomHandlers {
  #handlers;
  constructor() {
    this.#handlers = {};
  }
  process(event, data) {
    const handlers = this.#handlers[event] ?? [];
    handlers.forEach(handler => handler(data));
  }
  add(event, handler) {
    if (event in this.#handlers) {
      this.#handlers[event].push(handler);
    } else {
      this.#handlers[event] = [handler];
    }
  }
}
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