Added Vultr provider (#217) (#219)

* Added Vultr provider
* Fixed tests
* Fixed CI build validation
* Add unsupported features
* Added #rtype_variations tags according to stackexchange.github.io/dnscontrol/adding-new-rtypes
* Add title (for compatibility with #223)
* Removed extra rtype_variations

vendor/github.com/JamesClonk/vultr/lib/dns.go

@@ -0,0 +1,150 @@
+package lib
+
+import (
+	"fmt"
+	"net/url"
+	"sort"
+	"strings"
+)
+
+// DNSDomain represents a DNS domain on Vultr
+type DNSDomain struct {
+	Domain  string `json:"domain"`
+	Created string `json:"date_created"`
+}
+
+type dnsdomains []DNSDomain
+
+func (d dnsdomains) Len() int      { return len(d) }
+func (d dnsdomains) Swap(i, j int) { d[i], d[j] = d[j], d[i] }
+func (d dnsdomains) Less(i, j int) bool {
+	return strings.ToLower(d[i].Domain) < strings.ToLower(d[j].Domain)
+}
+
+// DNSRecord represents a DNS record on Vultr
+type DNSRecord struct {
+	RecordID int    `json:"RECORDID"`
+	Type     string `json:"type"`
+	Name     string `json:"name"`
+	Data     string `json:"data"`
+	Priority int    `json:"priority"`
+	TTL      int    `json:"ttl"`
+}
+
+type dnsrecords []DNSRecord
+
+func (d dnsrecords) Len() int      { return len(d) }
+func (d dnsrecords) Swap(i, j int) { d[i], d[j] = d[j], d[i] }
+func (d dnsrecords) Less(i, j int) bool {
+	// sort order: type, data, name
+	if d[i].Type < d[j].Type {
+		return true
+	} else if d[i].Type > d[j].Type {
+		return false
+	}
+	if d[i].Data < d[j].Data {
+		return true
+	} else if d[i].Data > d[j].Data {
+		return false
+	}
+	return strings.ToLower(d[i].Name) < strings.ToLower(d[j].Name)
+}
+
+// GetDNSDomains returns a list of available domains on Vultr account
+func (c *Client) GetDNSDomains() (domains []DNSDomain, err error) {
+	if err := c.get(`dns/list`, &domains); err != nil {
+		return nil, err
+	}
+	sort.Sort(dnsdomains(domains))
+	return domains, nil
+}
+
+// GetDNSRecords returns a list of all DNS records of a particular domain
+func (c *Client) GetDNSRecords(domain string) (records []DNSRecord, err error) {
+	if err := c.get(`dns/records?domain=`+domain, &records); err != nil {
+		return nil, err
+	}
+	sort.Sort(dnsrecords(records))
+	return records, nil
+}
+
+// CreateDNSDomain creates a new DNS domain name on Vultr
+func (c *Client) CreateDNSDomain(domain, serverIP string) error {
+	values := url.Values{
+		"domain":   {domain},
+		"serverip": {serverIP},
+	}
+
+	if err := c.post(`dns/create_domain`, values, nil); err != nil {
+		return err
+	}
+	return nil
+}
+
+// DeleteDNSDomain deletes an existing DNS domain name
+func (c *Client) DeleteDNSDomain(domain string) error {
+	values := url.Values{
+		"domain": {domain},
+	}
+
+	if err := c.post(`dns/delete_domain`, values, nil); err != nil {
+		return err
+	}
+	return nil
+}
+
+// CreateDNSRecord creates a new DNS record
+func (c *Client) CreateDNSRecord(domain, name, rtype, data string, priority, ttl int) error {
+	values := url.Values{
+		"domain":   {domain},
+		"name":     {name},
+		"type":     {rtype},
+		"data":     {data},
+		"priority": {fmt.Sprintf("%v", priority)},
+		"ttl":      {fmt.Sprintf("%v", ttl)},
+	}
+
+	if err := c.post(`dns/create_record`, values, nil); err != nil {
+		return err
+	}
+	return nil
+}
+
+// UpdateDNSRecord updates an existing DNS record
+func (c *Client) UpdateDNSRecord(domain string, dnsrecord DNSRecord) error {
+	values := url.Values{
+		"domain":   {domain},
+		"RECORDID": {fmt.Sprintf("%v", dnsrecord.RecordID)},
+	}
+
+	if dnsrecord.Name != "" {
+		values.Add("name", dnsrecord.Name)
+	}
+	if dnsrecord.Data != "" {
+		values.Add("data", dnsrecord.Data)
+	}
+	if dnsrecord.Priority != 0 {
+		values.Add("priority", fmt.Sprintf("%v", dnsrecord.Priority))
+	}
+	if dnsrecord.TTL != 0 {
+		values.Add("ttl", fmt.Sprintf("%v", dnsrecord.TTL))
+	}
+
+	if err := c.post(`dns/update_record`, values, nil); err != nil {
+		return err
+	}
+	return nil
+}
+
+// DeleteDNSRecord deletes an existing DNS record
+func (c *Client) DeleteDNSRecord(domain string, recordID int) error {
+	values := url.Values{
+		"domain":   {domain},
+		"RECORDID": {fmt.Sprintf("%v", recordID)},
+	}
+
+	if err := c.post(`dns/delete_record`, values, nil); err != nil {
+		return err
+	}
+	return nil
+}