export type ExtractMetaTagsWarningCode = 'EMPTY_INPUT';
export type CanonicalWarningCode = 'EMPTY_INPUT' | 'MISSING_CANONICAL' | 'MULTIPLE_CANONICAL';
export type MetaRobotsWarningCode = 'EMPTY_INPUT' | 'MISSING_META_ROBOTS';
export type MetaAnalysisWarningCode = CanonicalWarningCode | MetaRobotsWarningCode | 'MISSING_TITLE' | 'MULTIPLE_TITLES' | 'MISSING_META_DESCRIPTION' | 'MULTIPLE_META_DESCRIPTIONS';
export type MetaTagAttribute = 'name' | 'property' | 'http-equiv' | 'charset';
export type MetaTagEntry = {
    attribute: MetaTagAttribute;
    key: string;
    content: string | null;
    index: number;
};
export type ExtractMetaTagsOptions = {
    html: string;
};
export type ExtractMetaTagsResult = {
    metaTags: MetaTagEntry[];
    warningCodes: ExtractMetaTagsWarningCode[];
};
export type ExtractCanonicalOptions = {
    html: string;
};
export type CanonicalExtractionResult = {
    canonicalUrl: string | null;
    occurrences: number;
    warningCodes: CanonicalWarningCode[];
};
export type ExtractMetaRobotsOptions = {
    html: string;
};
export type MetaRobotsExtractionResult = {
    content: string | null;
    directives: string[];
    occurrences: number;
    warningCodes: MetaRobotsWarningCode[];
};
export type AnalyzeMetaTagsOptions = {
    html: string;
};
export type MetaTagsAnalysis = {
    title: string | null;
    titleCount: number;
    metaDescription: string | null;
    metaDescriptionCount: number;
    canonicalUrl: string | null;
    canonicalCount: number;
    robotsContent: string | null;
    robotsDirectives: string[];
    metaTags: MetaTagEntry[];
    openGraph: Record<string, string>;
    twitter: Record<string, string>;
    warningCodes: MetaAnalysisWarningCode[];
};