This code automates the process of sending messages on Facebook, handling thread navigation, multi-line message formatting, and error handling using web automation techniques.

Run example

npm run import -- "send facebook message"

send facebook message

function sendFacebookMessage(message, thread) {
    var result;
    if(typeof thread !== 'undefined') {
        result = client.getUrl()
            .then(url => url.indexOf(thread) > -1
                  ? []
                  : client.url(thread));
    } else {
        result = client;
    }
    const parts = message.split('\n');
    return result
        .click('//*[contains(@aria-label, "Type a message")]')
        .keys('Control')
        .keys('a')
        .keys('NULL')
        .keys('Delete')
        .then(() => importer.runAllPromises(parts.map((t, i) => resolve => {
            if(i === parts.length - 1) {
                return client.keys(t).then(() => resolve());
            }
            return client
                .keys(t)
                .keys('Shift')
                .keys('Enter')
                .keys('NULL')
                .catch(e => console.log(e))
                .then(() => resolve());
        })))
        .keys('\uE007')
        .catch(e => console.log(e))
}
module.exports = sendFacebookMessage;

/**
 * Sends a Facebook message with the given text, optionally to a specific thread.
 *
 * @param {string} message - The message to send.
 * @param {string} [thread] - The ID of the thread to send the message in.
 * @returns {Promise} A promise that resolves when the message has been sent.
 */
async function sendFacebookMessage(message, thread = null) {
  try {
    // Get the client object, or throw an error if it's not available
    const client = client.getUrl();
    if (thread) {
      // If a thread ID is specified, navigate to it
      if (!client.url(thread).then(url => url.indexOf(thread) > -1)) {
        throw new Error(`Thread not found: ${thread}`);
      }
    }

    // Split the message into parts
    const parts = message.split('\n');

    // Send each part of the message
    await Promise.all(parts.map((t, i) => {
      // If it's the last part, just send it
      if (i === parts.length - 1) {
        return client.keys(t);
      }
      // Otherwise, send it and then press enter
      return client.keys(t).keys('Shift').keys('Enter').keys('NULL');
    }));

    // Send the final part and press enter
    await client.keys(parts[parts.length - 1]).keys('Shift').keys('Enter').keys('NULL');

    // Press enter to send the message
    await client.keys('\uE007');
  } catch (error) {
    // Log any errors that occur
    console.error(error);
  }
}

module.exports = sendFacebookMessage;

This code snippet defines a function sendFacebookMessage that automates the process of sending a message on Facebook.

Here's a breakdown:

1. Initialization:

   • It takes two arguments: message (the text to send) and thread (the URL of the thread to send it to).
   • It initializes a result variable to handle navigation to the correct thread.

2. Thread Navigation:

   • If a thread URL is provided, it checks if the current URL is already on that thread. If not, it navigates to the specified thread using Selenium-like commands.
   • If no thread is provided, it assumes the current context is already in a valid thread.

3. Message Formatting and Sending:

   • It splits the message into lines using \n as a delimiter.
   • It clicks on the message input field and then uses a series of keystrokes to simulate typing the message:
     • Control + a selects all existing text (if any).
     • NULL simulates deleting the selected text.
     • It then types each line of the message using keys().
     • For the last line, it simply types the line and resolves the promise.
     • For other lines, it types the line, presses Shift + Enter to create a new line, and then simulates deleting the extra newline character.

4. Sending the Message:

   • After typing all lines, it simulates pressing the send button (\uE007).

5. Error Handling:

   • It uses catch(e => console.log(e)) to handle any errors during the process.

6. Export:

   • The sendFacebookMessage function is exported as a module, allowing it to be used in other parts of the application.

Key Points:

• Web Automation: The code relies heavily on Selenium-like commands to interact with Facebook's web interface.
• Message Formatting: It handles multi-line messages by simulating keystrokes and line breaks.
• Asynchronous Operations: Promises are used to manage the asynchronous nature of web requests and interactions.

Let me know if you have any other questions.