crypto.go

package main

import (
	"bufio"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"sort"
	"strings"
)

var url = "https://api.coincap.io/v2/assets"

type api struct {
	Data []struct {
		ID                string `json:"id"`
		Rank              string `json:"rank"`
		Symbol            string `json:"symbol"`
		Name              string `json:"name"`
		Supply            string `json:"supply"`
		MaxSupply         string `json:"maxSupply"`
		MarketCapUsd      string `json:"marketCapUsd"`
		VolumeUsd24Hr     string `json:"volumeUsd24Hr"`
		PriceUsd          string `json:"priceUsd"`
		ChangePercent24Hr string `json:"changePercent24Hr"`
		Vwap24Hr          string `json:"vwap24Hr"`
		Explorer          string `json:"explorer"`
	} `json:"data"`
	Timestamp int64 `json:"timestamp"`
}

func main() {
	resp, err := http.Get(strings.TrimSpace(url))
	if err != nil {
		fmt.Println("No response from request")
	}
	body, err := io.ReadAll(resp.Body)
	var jsonstr = body
	var getIt api
	json.Unmarshal([]byte(jsonstr), &getIt)
	if err != nil {
		panic(err)
	}
	var all = getIt.Data
	var length = 0
	var coins []string
	mapDict := make(map[string]int)

	for i := 0; i < len(all); i++ {
		var symbol = getIt.Data[i].Symbol
		coins = append(coins, symbol)
		mapDict[symbol] = i
		length++
	}

	sort.Sort(sort.StringSlice(coins))
	reader := bufio.NewReader(os.Stdin)
	fmt.Println(coins, "\nEnter a crypto from above:")
	pick, _ := reader.ReadString('\n')
	pick = pick[:len(pick)-1]
	var num = mapDict[strings.ToUpper(pick)]
	var name = all[num].Name
	var price = all[num].PriceUsd
	fmt.Println("\"" + name + "\" " + "$" + price)

}