import { IMustacheVariable, ITriggerReservedVariable } from '@novu/shared';
import { NotificationStep } from '../usecases/create-workflow';
export declare class ContentService {
    replaceVariables(content: string, variables: {
        [key: string]: string;
    }): string;
    extractVariables(content: string): IMustacheVariable[];
    extractMessageVariables(messages: NotificationStep[]): {
        variables: IMustacheVariable[];
        reservedVariables: ITriggerReservedVariable[];
    };
    extractStepVariables(messages: NotificationStep[]): IMustacheVariable[];
    extractReservedVariables(variables: IMustacheVariable[]): ITriggerReservedVariable[];
    extractSubscriberMessageVariables(messages: NotificationStep[]): string[];
    private messagesTextIterator;
    private isSystemVariable;
    private getVariableNamePrefix;
    private isReservedVariable;
    private escapeForRegExp;
    buildMessageVariables(commandPayload: any, subscriberPayload: any): {
        [key: string]: any;
    };
    private combineObjects;
    private isIFieldFilterPart;
    private filterChildren;
}
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