Тестовое Задание

Makefile

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+.PHONY: build
+build:
+	go build  ./main.go
+.DEFAULT_GOAL := build

go.mod

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+module git.ukamnya.ru/stulyaganov/testtasks
+
+go 1.20
+
+require golang.org/x/text v0.9.0 // indirect

go.sum

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+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=

main.go

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+package main
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"golang.org/x/text/encoding/charmap"
+)
+
+type ValCurs struct {
+	XMLName xml.Name `xml:"ValCurs"`
+	Text    string   `xml:",chardata"`
+	Date    string   `xml:"Date,attr"`
+	Name    string   `xml:"name,attr"`
+	Valute  []struct {
+		Text     string `xml:",chardata"`
+		ID       string `xml:"ID,attr"`
+		NumCode  string `xml:"NumCode"`
+		CharCode string `xml:"CharCode"`
+		Nominal  string `xml:"Nominal"`
+		Name     string `xml:"Name"`
+		Value    string `xml:"Value"`
+	} `xml:"Valute"`
+}
+type result struct {
+	name     string
+	value    float64
+	CharCode string
+	date     string
+}
+
+func CharsetReader(char string, data io.Reader) (io.Reader, error) {
+	if char == "windows-1251" {
+		return charmap.Windows1251.NewDecoder().Reader(data), nil
+	}
+	return nil, fmt.Errorf("Кодировка не поддерживается")
+}
+
+func MaxMinAvg(Curss []*ValCurs) (map[string]result, *float64) {
+	var min, max result
+	var agv, summ float64
+	var summItem int
+	res := make(map[string]result)
+	for i := 0; i < len(Curss); i++ {
+		for j := 0; j < len(Curss[i].Valute); j++ {
+			val, err := strconv.ParseFloat(strings.Replace(Curss[i].Valute[j].Value, ",", ".", 1), 64)
+			if err != nil {
+				fmt.Println(err)
+				return nil, nil
+			}
+
+			if val < min.value || min.value == 0 {
+				min.value = val
+				min.name = Curss[i].Valute[j].Name
+				min.CharCode = Curss[i].Valute[j].CharCode
+				min.date = Curss[i].Date
+			}
+			if val > max.value {
+				max.value = val
+				max.name = Curss[i].Valute[j].Name
+				max.CharCode = Curss[i].Valute[j].CharCode
+				max.date = Curss[i].Date
+			}
+			summ += val
+			summItem += i
+		}
+	}
+	res["Min"] = min
+	res["Max"] = max
+	agv = summ / float64(summItem)
+	return res, &agv
+}
+
+func main() {
+	Curss := []*ValCurs{}
+	Client := http.Client{
+		Timeout: time.Second * 10,
+	}
+	t := time.Now()
+	fmt.Println("Пожалуйста подождите....")
+	for i := 0; i <= 90; i++ {
+		buff := ValCurs{}
+		data := fmt.Sprint(t.Add((-2160 + 24*time.Duration(i)) * time.Hour).Format("02/01/2006"))
+		req, err := http.NewRequest("GET", "http://www.cbr.ru/scripts/XML_daily_eng.asp?date_req="+data, nil)
+		if err != nil {
+			fmt.Println(err)
+		}
+		req.Header.Add("User-Agent", "PostmanRuntime/7.31.3")
+		res, err := Client.Do(req)
+		if err != nil {
+			fmt.Println(err)
+		}
+		defer res.Body.Close()
+		dacoder := xml.NewDecoder(res.Body)
+		dacoder.CharsetReader = CharsetReader
+		err = dacoder.Decode(&buff)
+
+		if err != nil {
+			fmt.Println(err)
+		}
+		Curss = append(Curss, &buff)
+	}
+	MaxMin, avg := MaxMinAvg(Curss)
+	fmt.Println("Минимальный Курс")
+	fmt.Println(MaxMin["Min"].value, " ", MaxMin["Min"].name, " ", MaxMin["Min"].CharCode, " ", MaxMin["Min"].date)
+	fmt.Println("Максимальный Курс")
+	fmt.Println(MaxMin["Max"].value, " ", MaxMin["Max"].name, " ", MaxMin["Max"].CharCode, " ", MaxMin["Max"].date)
+	fmt.Println("Среднее значение курса", float32(*avg))
+
+}