bp_core_avatar_handle_upload( array $file, string $upload_dir_filter )

function bp_core_avatar_handle_upload( $file, $upload_dir_filter ) {

	/**
	 * Filters whether or not to handle uploading.
	 *
	 * If you want to override this function, make sure you return false.
	 *
	 * @since BuddyPress 1.2.4
	 *
	 * @param bool   $value             Whether or not to crop.
	 * @param array  $file              Appropriate entry from $_FILES superglobal.
	 * @parma string $upload_dir_filter A filter to be applied to 'upload_dir'.
	 */
	if ( ! apply_filters( 'bp_core_pre_avatar_handle_upload', true, $file, $upload_dir_filter ) ) {
		return true;
	}

	// Setup some variables.
	$bp          = buddypress();
	$upload_path = bp_core_avatar_upload_path();

	// Upload the file.
	$avatar_attachment = new BP_Attachment_Avatar();
	$bp->avatar_admin->original = $avatar_attachment->upload( $file, $upload_dir_filter );

	// In case of an error, stop the process and display a feedback to the user.
	if ( ! empty( $bp->avatar_admin->original['error'] ) ) {
		bp_core_add_message( sprintf( __( 'Upload Failed! Error was: %s', 'buddyboss' ), $bp->avatar_admin->original['error'] ), 'error' );
		return false;
	}

	// The Avatar UI available width.
	$ui_available_width = 0;

	// Try to set the ui_available_width using the avatar_admin global.
	if ( isset( $bp->avatar_admin->ui_available_width ) ) {
		$ui_available_width = $bp->avatar_admin->ui_available_width;
	}

	// Maybe resize.
	$bp->avatar_admin->resized = $avatar_attachment->shrink( $bp->avatar_admin->original['file'], $ui_available_width );
	$bp->avatar_admin->image   = new stdClass();

	// We only want to handle one image after resize.
	if ( empty( $bp->avatar_admin->resized ) ) {
		$bp->avatar_admin->image->file = $bp->avatar_admin->original['file'];
		$bp->avatar_admin->image->dir  = str_replace( $upload_path, '', $bp->avatar_admin->original['file'] );
	} else {
		$bp->avatar_admin->image->file = $bp->avatar_admin->resized['path'];
		$bp->avatar_admin->image->dir  = str_replace( $upload_path, '', $bp->avatar_admin->resized['path'] );
		@unlink( $bp->avatar_admin->original['file'] );
	}

	// Check for WP_Error on what should be an image.
	if ( is_wp_error( $bp->avatar_admin->image->dir ) ) {
		bp_core_add_message( sprintf( __( 'Upload Error: %s', 'buddyboss' ), $bp->avatar_admin->image->dir->get_error_message() ), 'error' );
		return false;
	}

	// If the uploaded image is smaller than the "full" dimensions, throw a warning.
	if ( $avatar_attachment->is_too_small( $bp->avatar_admin->image->file ) ) {
		bp_core_add_message( sprintf( __( 'For best results, upload an image that is %1$spx by %2$spx or larger.', 'buddyboss' ), bp_core_avatar_full_width(), bp_core_avatar_full_height() ), 'error' );
	}

	// Set the url value for the image.
	$bp->avatar_admin->image->url = bp_core_avatar_url() . $bp->avatar_admin->image->dir;

	return true;
}