Fetch data via go-gecko

README.md

Fetch data via go-gecko

Go Generic features require version 1.18

# go 구버전이 설치된 상태에서 1.18버전 설치
go install golang.org/dl/go1.18.3@latest
~/go/bin/go1.18.3 download
ln -s ~/go/bin/go1.18.3 ~/bin/go # 또는 ~/bin/go.exe(윈10), PATH 우선순위가 기존 go 보다 높아야함

go-gecko 설치

go get gecko

go.mod

module gecko

go 1.18

require (
	github.com/superoo7/go-gecko v1.0.0
)

main.go

package main

import (
	"log"
	"net/http"
	"time"

	coingecko "github.com/superoo7/go-gecko/v3"
	types "github.com/superoo7/go-gecko/v3/types"
)

type Any = interface{}
type Result = types.CoinList
type Token = types.CoinsListItem

/** Generic 매핑 함수 */
func Map[T comparable](vs []T, f func(T) T) []T {
	vsm := make([]T, len(vs))
	for i, v := range vs {
		vsm[i] = f(v)
	}
	return vsm
}

/** Item 저장 */
func storeCoin(coin Token) Token {
	log.Printf("%+v\n", coin)
	return coin
}

func main() {
	httpClient := &http.Client{
		Timeout: time.Second * 10,
	}
	client := coingecko.NewClient(httpClient)

	done := make(chan *Result)
	exit := make(chan error)
	go func() {
		for { // 비동기 루프
			coins, err := client.CoinsList()
			if err != nil {
				exit <- err
				break
			}
			done <- coins
			time.Sleep(time.Second * 2)
		}
	}()

	for {
		select {
		case coins := <-done:
			Map(*coins, storeCoin)
		case err := <-exit:
			log.Fatal(err)
			break
		}
	}
}

실행 테스트를 위해 패키지를 main으로 수정했습니다.