add cloudflare

internal/applicant/cloudflare.go

@@ -0,0 +1,33 @@
+package applicant
+
+import (
+	"certimate/internal/domain"
+	"encoding/json"
+	"os"
+
+	cf "github.com/go-acme/lego/v4/providers/dns/cloudflare"
+)
+
+type cloudflare struct {
+	option *ApplyOption
+}
+
+func NewCloudflare(option *ApplyOption) Applicant {
+	return &cloudflare{
+		option: option,
+	}
+}
+
+func (c *cloudflare) Apply() (*Certificate, error) {
+	access := &domain.CloudflareAccess{}
+	json.Unmarshal([]byte(c.option.Access), access)
+
+	os.Setenv("CLOUDFLARE_DNS_API_TOKEN", access.CloudflareDnsApiToken)
+
+	provider, err := cf.NewDNSProvider()
+	if err != nil {
+		return nil, err
+	}
+
+	return apply(c.option, provider)
+}