85 lines
1.9 KiB
TypeScript
85 lines
1.9 KiB
TypeScript
import { courseStartTimeToEventRow } from '../constants/index';
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import { SchedulerEvent } from '../types';
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export const createClassTime = (startTime: string): [string, string] => {
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const startTimeMapped = courseStartTimeToEventRow[startTime];
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const endTime = Object.keys(courseStartTimeToEventRow).find(
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(key) => courseStartTimeToEventRow[key] === startTimeMapped + 1,
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)!;
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return [startTime, endTime];
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};
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export const selectGroupsToShow = (schedulerEvents: Array<SchedulerEvent>, index: number) => {
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return schedulerEvents.filter(({ time }: { time: [string, string] }) => courseStartTimeToEventRow[time[0]] === index);
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};
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//debounce declaration and implementation
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type Procedure = (...args: any[]) => any;
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interface Debounce {
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(...args: any[]): any;
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clear: () => void;
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flush: () => void;
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}
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export const debounce = (func: Procedure, wait: number, immediate: boolean = false) => {
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let timeout: number | null;
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let args: any;
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let context: any;
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let result: any;
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const later = () => {
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timeout = null;
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if (!immediate) {
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result = func.apply(context, args);
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context = args = null;
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}
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};
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const debouncedFunc: Procedure = function (this: any) {
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context = this;
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args = arguments;
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const callNow = immediate && !timeout;
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if (!timeout) {
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timeout = window.setTimeout(later, wait);
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}
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if (callNow) {
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result = func.apply(context, args);
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context = args = null;
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}
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return result;
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};
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const clear = () => {
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if (timeout) {
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clearTimeout(timeout);
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timeout = null;
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}
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};
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const flush = () => {
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if (timeout) {
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result = func.apply(context, args);
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context = args = null;
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clearTimeout(timeout);
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timeout = null;
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}
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};
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const debounced: Debounce = (() => {
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const f: any = debouncedFunc;
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f.clear = clear;
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f.flush = flush;
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return f;
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})();
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return debounced;
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};
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