import {IList} from "./interfaces/IList";

const isAllLoadedLocally = function(pages: IList[]) {
    for (const i in pages) {
        const page = pages[i];
        if (localStorage.getItem(page.id + "title") === null) {
            return false;
        }
    }

    return true;
}

/** CALENDAR **/
// returns a new date shifted a certain number of days (can be negative)
const shiftDate = function(date, numDays) {
    const newDate = new Date(date);
    newDate.setDate(newDate.getDate() + numDays);
    return newDate;
}

const getBeginningTimeForDate = function(date: Date): Date {
    return new Date(date.getFullYear(), date.getMonth(), date.getDate());
}

// obj can be a parseable string, a millisecond timestamp, or a Date object
const convertToDate = function(obj): Date {
    return obj instanceof Date ? obj : new Date(obj);
}

const dateNDaysAgo = function(numDaysAgo) {
    return shiftDate(new Date(), -numDaysAgo);
}

const getRange = function(count) {
    const arr: number[] = [];
    for (let idx = 0; idx < count; idx += 1) {
        arr.push(idx);
    }
    return arr;
}

/** END CALENDAR **/


export { isAllLoadedLocally, shiftDate, getBeginningTimeForDate, convertToDate, dateNDaysAgo, getRange };