/**
 *  View mode means the minimal unit of measurement of current zoom.
 *  It can be 'Month', 'Week', 'Day' or your custom.
 *  ViewModeAdapter performs calculations between dates with own strategy depending on what unit of measurement they are connected to.
 */
export interface IViewModeAdaptor {
    /**
     * Transforms duration between dates into columns and returns date which placed in the center of the columns.
     * Example:
     *    When view mode == Months:
     *     1) firstDate = 01.02.2023, lastDate = 02.02.2023, result = 14.02.2023 (Middle date in February);
     *     2) firstDate = 10.01.2023, lastDate = 10.03.2023, result = 01.02.2023 (Middle date between 3 months);
     *    When view mode == Days:
     *     1) firstDate = 01.02.2023, lastDate = 02.02.2023, result = starting of 02.02.2023 or ending of 01.02.2023.
     *     2) firstDate = 01.02.2023, lastDate = 05.02.2023, result = 03.02.2023.
     */
    getMiddleDate(startDate: Date, endDate: Date): Date;
    /**
     *  Returns the unique count of columns with includes two dates between them.
     *  Result should be always integer.
     */
    getUniqueColumnsWithinRange(startDate: Date, endDate: Date): number;
    /**
     * Returns the duration between dates which is transformed into a number of columns.
     */
    getDurationInColumns(startDate: Date, endDate: Date): number;
    /**
     * Adds one unit of measurement to date.
     */
    addColumnToDate(date: Date, units: number): Date;
    /**
     * Returns the date where column is beginning.
     * @param date
     * @returns date
     */
    getBeginningDateOfColumn(date: Date): Date;
    /**
     * Returns the date where column is ending.
     * @param date
     * @returns date
     */
    getEndingDateOfColumn(date: Date): Date;
}