masteries.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

type MasteryPageContainer struct {
	Pages []MasteryPage `"json:pages"`
}

type MasteryPage struct {
	Masteries []Mastery `"json:masteries"`
	Id        int64     `"json:id"`
	Name      string    `"json:name"`
	Current   bool      `"json:current"`
}

type Mastery struct {
	Id   int `"json:id"`
	Rank int `"json:rank"`
}

const region = "oce"
const summonerId = "3190144"
const apiKey = "your key here"

func main() {
	// Make the HTTP get request
	resp, err := http.Get("https://" + region + ".api.pvp.net/api/lol/" + region +
		"/v1.4/summoner/" + summonerId + "/masteries?api_key=" + apiKey)
	if err != nil {
		// You should handle the error here
		panic(err)
	}

	// Close the body reader when finished
	defer resp.Body.Close()

	// Handle non 200 status codes
	if resp.StatusCode != 200 {
		fmt.Println("Status code is not 200!")
		fmt.Println("Instead it is: " + resp.Status)
		return
	}

	// Read all the contents
	contents, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		// You should handle the error here
		panic(err)
	}

	// Store the results in a map as you will need to
	// resolve the summoner id index
	results := make(map[string]MasteryPageContainer)

	// Unmarshal (decode) the JSON
	err = json.Unmarshal(contents, &results)
	if err != nil {
		// You should handle the error here
		panic(err)
	}

	pageContainer, found := results[summonerId]
	// Check that the value at the index exists
	if !found {
		fmt.Println("Could not find mastery pages of summoner from response!")
		return
	}

	// Print out all the names of the mastery pages
	fmt.Println("Here's a list of mastery pages for " + summonerId + ":")
	for _, mastery := range pageContainer.Pages {
		fmt.Println("- " + mastery.Name)
	}
}