import { LogDescriptor } from 'pino';
/**
 * Formats log entries for email delivery
 * Supports both HTML and plain text formats
 */
export declare class EmailLogFormatterService {
    /**
     * Format log entry as HTML email
     */
    formatHtml(log: LogDescriptor, appName: string, subjectPrefix: string): {
        subject: string;
        html: string;
    };
    /**
     * Format log entry as plain text
     */
    formatText(log: LogDescriptor, appName: string, subjectPrefix: string): {
        subject: string;
        text: string;
    };
    /**
     * Extract HTTP context from log metadata
     */
    private extractHttpContext;
    /**
     * Exclude HTTP context from general metadata
     */
    private excludeHttpContext;
    /**
     * Format request information for HTML
     */
    private formatRequestInfo;
    /**
     * Format request information for text
     */
    private formatRequestInfoText;
    /**
     * Generate a curl command for the request (single line for easy copying)
     */
    private generateCurlCommand;
    /**
     * Format user information for HTML
     */
    private formatUserInfo;
    /**
     * Format user information for text
     */
    private formatUserInfoText;
    /**
     * Format error object for HTML
     */
    private formatError;
    /**
     * Format error object for text
     */
    private formatErrorText;
    /**
     * Format metadata object for HTML
     */
    private formatMetadata;
    /**
     * Format a value for HTML display
     */
    private formatValue;
    /**
     * Get human-readable log level label
     * Uses shared utility from log-level.helper
     */
    private getLevelLabel;
    /**
     * Get color for log level
     */
    private getLevelColor;
    /**
     * Escape HTML special characters
     */
    private escapeHtml;
}