1package cmd
 2
 3import (
 4	"errors"
 5	"fmt"
 6	"os"
 7
 8	"github.com/bryfry/cfdns/internal/cf"
 9	"github.com/bryfry/cfdns/internal/iplookup"
10	"github.com/spf13/cobra"
11)
12
13const (
14	_cfdnsEnvZoneName      = "CFDNS_ZONE_NAME"
15	_cfdnsEnvSubdomainName = "CFDNS_SUBDOMAIN_NAME"
16	_cfdnsEnvAPIToken      = "CFDNS_API_TOKEN"
17)
18
19var (
20	_envErrFmt               = "required env variable %s not found or empty"
21	ErrZoneNameRequired      = errors.New(fmt.Sprintf(_envErrFmt, _cfdnsEnvZoneName))
22	ErrSubdomainNameRequired = errors.New(fmt.Sprintf(_envErrFmt, _cfdnsEnvSubdomainName))
23	ErrAPITokenRequired      = errors.New(fmt.Sprintf(_envErrFmt, _cfdnsEnvAPIToken))
24)
25
26func RootCmd() *cobra.Command {
27	root := &cobra.Command{
28		Use:          "cfdns",
29		Short:        "update cloudflare dns",
30		Version:      "0.0.1",
31		Args:         cobra.NoArgs,
32		SilenceUsage: true,
33		RunE:         rootE,
34	}
35	return root
36}
37
38func rootE(cmd *cobra.Command, args []string) error {
39
40	zoneName, zoneNameExists := os.LookupEnv(_cfdnsEnvZoneName)
41	if !zoneNameExists || len(zoneName) == 0 {
42		return ErrZoneNameRequired
43	}
44	subdomainName, subdomainNameExists := os.LookupEnv(_cfdnsEnvSubdomainName)
45	if !subdomainNameExists || len(subdomainName) == 0 {
46		return ErrSubdomainNameRequired
47	}
48	apiToken, apiTokenExists := os.LookupEnv(_cfdnsEnvAPIToken)
49	if !apiTokenExists || len(apiToken) == 0 {
50		return ErrAPITokenRequired
51	}
52
53	ipDetails, err := iplookup.Discover()
54	if err != nil {
55		return err
56	}
57	fmt.Printf("External IP: %s\n", ipDetails.Address)
58	fmt.Printf("DNS Record Name: %s\n", subdomainName)
59
60	cfdns, err := cf.New(
61		zoneName,
62		subdomainName,
63		apiToken)
64	if err != nil {
65		return err
66	}
67
68	fmt.Printf("Current DNS Record IP: %s\n", cfdns.IP())
69	err = cfdns.SetIP(ipDetails.Address)
70	if err != nil {
71		return err
72	}
73	fmt.Printf("Updated DNS Record IP: %s\n", cfdns.IP())
74	return nil
75}