public function wp_editPost( $args ) {
		if ( ! $this->minimum_args( $args, 5 ) ) {
			return $this->error;
		}

		$this->escape( $args );

		$username       = $args[1];
		$password       = $args[2];
		$post_id        = (int) $args[3];
		$content_struct = $args[4];

		$user = $this->login( $username, $password );
		if ( ! $user ) {
			return $this->error;
		}

		/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
		do_action( 'xmlrpc_call', 'wp.editPost' );

		$post = get_post( $post_id, ARRAY_A );

		if ( empty( $post['ID'] ) ) {
			return new IXR_Error( 404, __( 'Invalid post ID.' ) );
		}

		if ( isset( $content_struct['if_not_modified_since'] ) ) {
			// If the post has been modified since the date provided, return an error.
			if ( mysql2date( 'U', $post['post_modified_gmt'] ) > $content_struct['if_not_modified_since']->getTimestamp() ) {
				return new IXR_Error( 409, __( 'There is a revision of this post that is more recent.' ) );
			}
		}

		// Convert the date field back to IXR form.
		$post['post_date'] = $this->_convert_date( $post['post_date'] );

		/*
		 * Ignore the existing GMT date if it is empty or a non-GMT date was supplied in $content_struct,
		 * since _insert_post() will ignore the non-GMT date if the GMT date is set.
		 */
		if ( $post['post_date_gmt'] == '0000-00-00 00:00:00' || isset( $content_struct['post_date'] ) ) {
			unset( $post['post_date_gmt'] );
		} else {
			$post['post_date_gmt'] = $this->_convert_date( $post['post_date_gmt'] );
		}

		/*
		 * If the API client did not provide post_date, then we must not perpetuate the value that was
		 * stored in the database, or it will appear to be an intentional edit. Conveying it here as if
		 * it was coming from the API client will cause an otherwise zeroed out post_date_gmt to get set
		 * with the value that was originally stored in the database when the draft was created.
		 */
		if ( ! isset( $content_struct['post_date'] ) ) {
			unset( $post['post_date'] );
		}

		$this->escape( $post );
		$merged_content_struct = array_merge( $post, $content_struct );

		$retval = $this->_insert_post( $user, $merged_content_struct );
		if ( $retval instanceof IXR_Error ) {
			return $retval;
		}

		return true;
	}