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javascript
7 months ago
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  // Function to remove duplicate messages in a chat
  function removeDuplicateMessages() {
    // Get the messages container element
    const messagesContainer = document.getElementById('chat-content');

    // Get all the chat message elements from the messages container
    const chatMessages = messagesContainer.querySelectorAll('.messages-content div p');

    // Create an object to store messages for each username
    const usernameMessages = {};

    // Total count of duplicate messages
    let totalDuplicateCount = 0;

    // Iterate over each chat message
    chatMessages.forEach((message, index) => {
      // Extract the text content without considering the time and username
      const messageText = Array.from(message.childNodes)
        .filter(node => node.nodeType === Node.TEXT_NODE)
        .map(node => node.textContent)
        .join('');

      // Extract the user's username
      const usernameElement = message.querySelector('.username span[data-user]');
      if (!usernameElement) {
        return; // Skip messages without a username
      }
      const username = usernameElement.dataset.user;

      // Create an object for the username if it doesn't exist
      usernameMessages[username] = usernameMessages[username] || {};

      // Add the message to the object based on its text content
      if (!usernameMessages[username][messageText]) {
        // If the message is encountered for the first time, initialize the object
        usernameMessages[username][messageText] = {
          occurrences: 1,
          messages: [message]
        };
      } else {
        // If the message is a duplicate, increment occurrences and add to messages array
        usernameMessages[username][messageText].occurrences++;
        usernameMessages[username][messageText].messages.push(message);
        totalDuplicateCount++;
      }
    });

    // Iterate over each username and text content
    Object.keys(usernameMessages).forEach((username) => {
      Object.keys(usernameMessages[username]).forEach((messageText) => {
        // Check if occurrences are 2 or more
        if (usernameMessages[username][messageText].occurrences >= 2) {
          // Set class 'spam-message' and display: none for all occurrences except the first one for this username and text content
          usernameMessages[username][messageText].messages.forEach((message, i) => {
            if (i === 0) {
              // Add class 'initial-spam-message' for the first message
              if (!message.classList.contains('initial-spam-message')) {
                message.classList.add('initial-spam-message');

                // Create a span element if it doesn't exist for this username and text content
                let spamCountSpan = message.querySelector('.spam-messages-count');
                if (!spamCountSpan) {
                  spamCountSpan = document.createElement('span');
                  spamCountSpan.classList.add('spam-messages-count');
                  spamCountSpan.style.color = 'chocolate';
                  message.appendChild(spamCountSpan);
                }

                // Update the text content of the span for this username and text content
                spamCountSpan.textContent = ` ${usernameMessages[username][messageText].occurrences - 1}`;
              } else {
                // If the element already has 'initial-spam-message', update the span element
                let spamCountSpan = message.querySelector('.spam-messages-count');
                if (spamCountSpan) {
                  spamCountSpan.textContent = ` ${usernameMessages[username][messageText].occurrences - 1}`;
                }
              }
            } else {
              if (!message.classList.contains('spam-message')) {
                message.classList.add('spam-message');
                message.style.display = 'none';
              }
            }
          });
        }
      });
    });
  }
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