Event Listener Override

November 18, 2024 · AI Conversations

User

public function get_conditional_event_script( $event_name, $params, $listener, $jsonified_pii ) {

$code = self::build_event( $event_name, $params, 'track' );
$this->last_event = $event_name;

/**
* TODO: use the settings stored by {@see WC_Facebookcommerce_Integration}.
* The use_pii setting here is currently always disabled regardless of
* the value configured in the plugin settings page {WV-2020-01-02}.
*/

// Prepends fbq(…) with pii information to the injected code.
if ( $jsonified_pii && get_option( self::SETTINGS_KEY )[ self::USE_PII_KEY ] ) {
$this->user_info = '%s';
$code = sprintf( $this->get_pixel_init_code(), '" || ' . $jsonified_pii . ' || "' ) . $code;
}

ob_start();

<script>
>
				document.addEventListener( '<?php echo esc_js( $listener ); ?>', function (event) {
					console.log('Welcome FB Event!!');
					<?php echo $code; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
				}, false );
</script>

Assistant

If you want to override the existing function's `document.addEventListener` section in WordPress to modify the event listener part, you can achieve this by extending or overriding the method where it's defined. Here's a way to do it by creating a custom class that extends the original class, or you could directly modify it if you have access to the codebase.

Assuming you want to modify this section:

document.addEventListener('<?php echo esc_js($listener); ?>', function (event) {
    console.log('Welcome FB Event!!');
    <?php echo $code; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
}, false);

### Approach 1: Overriding the Function in a Child Theme or Plugin

You can create a new function to override the existing one. Here's an example of how you can do this:

1. **Create a New PHP File in Your Child Theme or Custom Plugin**:

“`php
if ( ! class_exists

Assistant

To override the provided function, specifically to replace the section:

document.addEventListener('<?php echo esc_js( $listener ); ?>', function (event) {
    console.log('Welcome FB Event!!');
    <?php echo $code; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
}, false );

with a new implementation, you can follow these steps:

### Approach 1: Direct Function Override (if possible)
If you can directly modify the codebase where this function is defined, you can replace the event listener code within the original function:

**Updated Function:**

public function get_conditional_event_script( $event_name, $params, $listener, $jsonified_pii ) {

    $code             = self::build_event( $event_name, $params, 'track' );
    $this->last_event = $event_name;

    // TODO: use the settings stored by {@see WC_Facebookcommerce_Integration}.
    // The use_pii setting here is currently always disabled regardless of
    // the value configured in the plugin settings page {WV-2020-01-02}.

    // Prepends fbq(...) with pii information to the injected code.
    if ( $jsonified_pii && get_option( self::SETTINGS_KEY )[ self::USE_PII_KEY ] ) {
        $this->user_info = '%s';
        $code            = sprintf( $this->get_pixel_init_code(), '" || ' . $jsonified_pii . ' || "' ) . $code;
    }

    ob_start();

    ?>
    <!-- Facebook Pixel Event Code -->
    <script <?php echo self::get_script_attributes(); // phpcs:ignore WordPress.Security.EscapeOutput.Output ?>>
        // Updated event listener
        window.addEventListener('<?php echo esc_js( $listener ); ?>', function (event) {
            console.log('New FB Event Triggered!');
            <?php echo $code; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
        });
    </script>
    <!-- End Facebook Pixel Event Code -->
    <?php

    return ob_get_clean();
}

### Approach 2: Using WordPress Hooks (Recommended)
If you don't want to modify the plugin's core files, you can leverage WordPress hooks to override the output. This approach is more upgrade-safe.

First, ensure you have a way to inject your custom script by using WordPress action hooks like `wp_footer` or similar.

**Custom Override via Hook:**

Add the following code to your theme's `functions.php` file or a custom plugin:

add_action( 'wp_footer', 'override_facebook_pixel_event', 100 );

function override_facebook_pixel_event() {
    $event_name   = 'YourEventName'; // Use your specific event name
    $params       = []; // Pass any required params
    $listener     = 'your-custom-listener'; // Your custom event listener
    $jsonified_pii = ''; // Pass any PII if necessary

    $code = WC_Facebookcommerce_Integration::build_event( $event_name, $params, 'track' );

    if ( $jsonified_pii && get_option( WC_Facebookcommerce_Integration::SETTINGS_KEY )[ WC_Facebookcommerce_Integration::USE_PII_KEY ] ) {
        $user_info = '%s';
        $code      = sprintf( WC_Facebookcommerce_Integration::get_pixel_init_code(), '" || ' . $jsonified_pii . ' || "' ) . $code;
    }
    ?>
    <!-- Overridden Facebook Pixel Event Code -->
    <script>
        window.addEventListener('<?php echo esc_js( $listener ); ?>', function (event) {
            console.log('Custom FB Event Triggered!');
            <?php echo $code; ?>
        });
    </script>
    <!-- End Overridden Facebook Pixel Event Code -->
    <?php
}

### Explanation
– **Approach 1** is for when you have direct access to modify the plugin.
– **Approach 2** is safer as it uses WordPress hooks, making it resistant to plugin updates that might overwrite your changes.

Adjust the event name, listener, and any other variables according to your specific use case.

Event Listener Override

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