@lunarisapp/readability/dist/index.d.ts

A library for calculating readability scores of texts

import { Language } from '@lunarisapp/language';
export { Language } from '@lunarisapp/language';

/**
 * Calculate the Flesch reading ease test for text.
 * https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests#Flesch_reading_ease
 */
declare function fleschReadingEase(params: {
    sentences: number;
    syllablesPerWord: number;
    coefficients?: {
        base?: number;
        sentences?: number;
        syllablesPerWord?: number;
    };
}): number;

/**
 * Calculate the Flesch-Kincaid grade level for text.
 * https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests#Flesch%E2%80%93Kincaid_grade_level
 * TODO: can we support multiple languages?
 */
declare function fleschKincaidGrade(params: {
    sentences: number;
    syllablesPerWord: number;
}): number;

/**
 * Calculate the SMOG index for text.
 * https://en.wikipedia.org/wiki/SMOG
 */
declare function smogIndex(params: {
    sentences: number;
    polysyllables: number;
}): number;

/**
 * Calculate the Coleman-Liau index for text.
 * https://en.wikipedia.org/wiki/Coleman%E2%80%93Liau_index
 */
declare function colemanLiauIndex(params: {
    letters: number;
    sentences: number;
}): number;

/**
 * Calculate the automated readability index for text.
 * https://en.wikipedia.org/wiki/Automated_readability_index
 */
declare function automatedReadabilityIndex(params: {
    chars: number;
    words: number;
    sentences: number;
}): number;

/**
 * Calculate the Linsear Write formula for text.
 * https://en.wikipedia.org/wiki/Linsear_Write
 */
declare function linsearWriteFormula(params: {
    sentences: number;
    syllablesPerWords: number[];
}): number;

/**
 * Calculate Gutierrez Polini's readability formula for text (Spanish only).
 * https://www.spanishreadability.com/gutierrez-de-polinis-readability-formula
 */
declare function gutierrezPolini(params: {
    words: number;
    sentences: number;
    letters: number;
}): number;

/**
 * Calculate Crawford's formula for text (Spanish only).
 * https://www.spanishreadability.com/the-crawford-score-for-spanish-texts
 */
declare function crawford(params: {
    words: number;
    sentences: number;
    syllables: number;
}): number;

/**
 * Calculate the Gulpease index for text (Italian only).
 * https://it.wikipedia.org/wiki/Indice_Gulpease
 */
declare function gulpeaseIndex(params: {
    sentences: number;
    chars: number;
    words: number;
}): number;

declare const VARIANTS: {
    1: {
        ms: number;
        sl: number;
        iw: number;
        es: number;
        base: number;
    };
    2: {
        ms: number;
        sl: number;
        iw: number;
        es: number;
        base: number;
    };
    3: {
        ms: number;
        sl: number;
        iw: number;
        es: number;
        base: number;
    };
    4: {
        ms: number;
        sl: number;
        iw: number;
        es: number;
        base: number;
    };
};
type WienerSachtextformelVariant = keyof typeof VARIANTS;
/**
 * Calculate the Wiener Sachtextformel for text (german).
 * https://de.wikipedia.org/wiki/Lesbarkeitsindex#Wiener_Sachtextformel
 */
declare function wienerSachtextformel(params: {
    words: number;
    sentences: number;
    longWords: number;
    polysyllables: number;
    monosyllables: number;
    variant: WienerSachtextformelVariant;
}): number;

/**
 * Calculate the McAlpine EFLAW score.
 * https://www.angelfire.com/nd/nirmaldasan/journalismonline/fpetge.html
 */
declare function mcalpineEflaw(params: {
    words: number;
    sentences: number;
    miniWords: number;
}): number;

/**
 * Calculate the LIX ratio.
 * https://readable.com/readability/lix-rix-readability-formulas/
 * @param params
 */
declare function lix(params: {
    words: number;
    longWords: number;
    wordsPerSentence: number;
}): number;

/**
 * Calculate the RIX ratio.
 * https://readable.com/readability/lix-rix-readability-formulas/
 * @param params
 */
declare function rix(params: {
    longWords: number;
    sentences: number;
}): number;

declare class TextReadability {
    private readonly cache;
    private readonly cacheEnabled;
    private lang;
    private textStats;
    constructor(props?: {
        lang?: Language;
        cache?: boolean;
    });
    private getCfg;
    /**
     * Set the language for the text statistics.
     * @param lang
     */
    setLang(lang: Language): void;
    /**
     * Calculate the Flesch reading ease test for text.
     * https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests#Flesch_reading_ease
     * @param text
     */
    fleschReadingEase(text: string): number;
    private computeFleschReadingEase;
    /**
     * Calculate the Flesch-Kincaid grade level for text.
     * https://en.wikipedia.org/wiki/Flesch%E2%80%93Kincaid_readability_tests#Flesch%E2%80%93Kincaid_grade_level
     * TODO: can we support multiple languages?
     * @param text
     */
    fleschKincaidGrade(text: string): number;
    private computeFleschKincaidGrade;
    /**
     * Calculate the SMOG index for text.
     * https://en.wikipedia.org/wiki/SMOG
     * @param text
     */
    smogIndex(text: string): number;
    private computeSmogIndex;
    /**
     * Calculate the Coleman-Liau index for text.
     * https://en.wikipedia.org/wiki/Coleman%E2%80%93Liau_index
     * @param text
     */
    colemanLiauIndex(text: string): number;
    private computeColemanLiauIndex;
    /**
     * Calculate the automated readability index for text.
     * https://en.wikipedia.org/wiki/Automated_readability_index
     * @param text
     */
    automatedReadabilityIndex(text: string): number;
    private computeAutomatedReadabilityIndex;
    /**
     * Calculate the Linsear Write formula for text.
     * https://en.wikipedia.org/wiki/Linsear_Write
     * @param text
     * @param sample Number of words to sample from the text
     */
    linsearWriteFormula(text: string, sample?: number): number;
    private computeLinsearWriteFormula;
    /**
     * Calculate Gutierrez Polini's readability formula for text (Spanish only).
     * https://www.spanishreadability.com/gutierrez-de-polinis-readability-formula
     * @param text
     */
    gutierrezPolini(text: string): number;
    private computeGutierrezPolini;
    /**
     * Calculate Crawford's formula for text (Spanish only).
     * https://www.spanishreadability.com/the-crawford-score-for-spanish-texts
     * @param text
     */
    crawford(text: string): number;
    private computeCrawford;
    /**
     * Calculate the Gulpease index for text (Italian only).
     * https://it.wikipedia.org/wiki/Indice_Gulpease
     * @param text
     */
    gulpeaseIndex(text: string): number;
    private computeGulpeaseIndex;
    /**
     * Calculate the RIX ratio.
     * https://readable.com/readability/lix-rix-readability-formulas/
     * @param text
     */
    rix(text: string): number;
    private computeRix;
    /**
     * Calculate the LIX ratio.
     * https://readable.com/readability/lix-rix-readability-formulas/
     * @param text
     */
    lix(text: string): number;
    private computeLix;
    /**
     * Calculate the Wiener Sachtextformel for text (german).
     * https://de.wikipedia.org/wiki/Lesbarkeitsindex#Wiener_Sachtextformel
     * @param text
     * @param variant
     */
    wienerSachtextformel(text: string, variant?: WienerSachtextformelVariant): number;
    private computeWienerSachtextformel;
    /**
     * Calculate the McAlpine EFLAW score for text.
     * https://www.angelfire.com/nd/nirmaldasan/journalismonline/fpetge.html
     * @param text
     */
    mcalpineEflaw(text: string): number;
    private computeMcalpineEflaw;
}

export { TextReadability, VARIANTS, type WienerSachtextformelVariant, automatedReadabilityIndex, colemanLiauIndex, crawford, fleschKincaidGrade, fleschReadingEase, gulpeaseIndex, gutierrezPolini, linsearWriteFormula, lix, mcalpineEflaw, rix, smogIndex, wienerSachtextformel };