myapp.go

package main

import (
	"fmt"
	"os"
	"strconv"
	"strings"

	"github.com/dnsimple/dnsimple-go/dnsimple"
)

func main() {
	oauthToken := os.Getenv("TOKEN")
	client := dnsimple.NewClient(dnsimple.NewOauthTokenCredentials(oauthToken))

	listDomains := buildListDomainsFunc(client)
	createDomain := buildCreateDomainFunc(client)
	createRecord := buildCreateRecordFunc(client)

	commands := map[string]func(string, map[string]string){
		"domains.list":   listDomains,
		"domains.create": createDomain,
		"records.create": createRecord,
	}

	if len(os.Args) <= 1 {
		usage("")
		return
	}

	commandName := os.Args[1]
	commandFunc := commands[commandName]
	if commandFunc == nil {
		usage(commandName)
	} else {
		fmt.Printf("Connecting to DNSimple API...\n\n")

		whoamiResponse, err := client.Identity.Whoami()
		if err != nil {
			fmt.Printf("Whoami() returned error: %v\n", err)
			os.Exit(1)
		}
		fmt.Printf("Connected as %+v\n\n", whoamiResponse.Data.Account.Email)

		accountId := strconv.Itoa(whoamiResponse.Data.Account.ID)

		commandFunc(accountId, extractOptions(os.Args))
	}
}

func usage(commandName string) {
	if commandName == "" {
		fmt.Printf("Command is required\n\n")
	} else {
		fmt.Printf("Unknown command: %v\n\n", commandName)
	}
	fmt.Printf("The following commands are supported:\n")
	fmt.Printf("  domains.list\n")
	fmt.Printf("  domains.create name:example.com\n")
	fmt.Printf("  records.create domain:example.com type:A content:1.2.3.4 ttl:600\n")
}

func buildListDomainsFunc(client *dnsimple.Client) func(string, map[string]string) {
	return func(accountId string, _options map[string]string) {
		listDomainsResponse, err := client.Domains.ListDomains(accountId, nil)
		if err != nil {
			fmt.Printf("ListDomains() returned error: %v\n", err)
			os.Exit(1)
		}

		for _, domain := range listDomainsResponse.Data {
			fmt.Printf("%+v\n", domain)
		}
	}
}

func buildCreateDomainFunc(client *dnsimple.Client) func(string, map[string]string) {
	return func(accountId string, options map[string]string) {
		domainAttributes := dnsimple.Domain{Name: options["name"]}
		createDomainResponse, err := client.Domains.CreateDomain(accountId, domainAttributes)
		if err != nil {
			fmt.Printf("CreateDomain() returned error: %v\n", err)
			os.Exit(1)
		}

		fmt.Printf("%+v\n", createDomainResponse.Data)
	}
}

func buildCreateRecordFunc(client *dnsimple.Client) func(string, map[string]string) {
	return func(accountId string, options map[string]string) {
		domainId := options["domain"]

		recordAttributes := dnsimple.ZoneRecord{Name: options["name"], Type: options["type"], Content: options["content"]}
		if options["ttl"] != "" {
			ttl, err := strconv.Atoi(options["ttl"])
			if err != nil {
				fmt.Printf("Problem parsing TTL: %v\n", err)
				os.Exit(1)
			}
			recordAttributes.TTL = ttl
		}

		createRecordResponse, err := client.Zones.CreateRecord(accountId, domainId, recordAttributes)
		if err != nil {
			fmt.Printf("CreateRecord() returned error: %v\n", err)
			os.Exit(1)
		}

		fmt.Printf("%+v\n", createRecordResponse.Data)
	}
}

func extractOptions(args []string) map[string]string {
	options := map[string]string{}
	if len(args) > 2 {
		for _, arg := range args[2:] {
			argNameVal := strings.Split(arg, ":")
			options[argNameVal[0]] = argNameVal[1]
		}
	}
	return options
}