Introduce a component to generate error blocks

/**
 * Generates error blocks to render an error in a wiki page.
 *
 * @version $Id$
 * @since 8.1M1
 */
@Role
public interface ErrorBlockGenerator
{
    /**
     * The CSS class attribute name to use for the generated top level error block.
     */
    String CLASS_ATTRIBUTE_NAME = "class";

    /**
     * The CSS class attribute value to use for the block displaying the message.
     */
    String CLASS_ATTRIBUTE_MESSAGE_VALUE = "xwikirenderingerror";

    /**
     * The CSS class attribute value to use for the block displaying the description.
     */
    String CLASS_ATTRIBUTE_DESCRIPTION_VALUE = "xwikirenderingerrordescription hidden";

    /**
     * Generates error blocks to render an error in a wiki page.
     *
     * @param message the short message that will be displayed to the user
     * @param description the description that will be displayed to the user when he clicks on the message
     * @param isInline whether the generated blocks should be inline or not
     * @return the generated blocks
     */
    List<Block> generateErrorBlocks(String message, String description, boolean isInline);

    /**
     * Generates error blocks to render an error in a wiki page.
     *
     * @param messagePrefix the prefix of the short message that will be displayed to the user. This message will be
     *                      augmented with the root cause of the error extracted from the passed throwable and an
     *                      additional text inviting the user to click the message will be added to the message prefix
     * @param throwable the exception from which the description will be extracted from
     * @param isInline whether the generated blocks should be inline or not
     * @return the generated blocks
     */
    List<Block> generateErrorBlocks(String messagePrefix, Throwable throwable, boolean isInline);
}