Code used during golden hour

golden_hour_code.go

package main

import (
	"errors"
	"fmt"
	"sync"
	"time"
)

type (
	zoomMeeting struct {
		// 10 or 11 digits -> Rune -> int32 - Unicode characters
		ID int64
		// string -> []byte{} -> byte -> uint8 // type byte = uint8 // A, B, C, D etc
		Topic string
	}
)

func main() {
	m := eventRepo()

	var wg sync.WaitGroup
	errChan := make([]chan error, len(m))
	for i := range errChan {
		errChan[i] = make(chan error, 1)
	}

	for i, v := range m {
		wg.Add(1)

		go func(i int, v zoomMeeting) {
			defer wg.Done()
			err := zoomValidateHTTP(v)
			if err != nil {
				errChan[i] <- err
			} else {
				close(errChan[i])
			}
		}(i, v)
	}
	wg.Wait()

	for _, ch := range errChan {
		if ch != nil {
			err, ok := <-ch
			if ok {
				fmt.Printf("Error %v", err)
			}
		}
	}
}

func zoomValidateHTTP(m zoomMeeting) error {
	time.Sleep(3 * time.Second)
	fmt.Println("fetched event for ID %v", m.ID)

	if m.ID == 5 {
		return errors.New("this is some random error")
	}
	return nil
}

func eventRepo() []zoomMeeting {
	var m []zoomMeeting

	for i := 0; i < 10; i++ {
		m = append(m, zoomMeeting{
			ID:    int64(i),
			Topic: fmt.Sprintf("Topic %v", i),
		})
	}

	return m
}