add OVH provider

pkg/providers/main.go

@@ -0,0 +1,6 @@
+package providers
+
+// Provider is the default interface for all providers
+type Provider interface {
+	UpdateIP(subdomain, ip string) error
+}

pkg/providers/ovh/main.go

@@ -0,0 +1,60 @@
+package ovh
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/datahearth/ddnsclient/pkg/providers"
+	"github.com/datahearth/ddnsclient/pkg/utils"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
+)
+
+type ovh struct {
+	ovhConfig config
+	logger    logrus.FieldLogger
+}
+
+// NewOVH returns a new instance of the OVH provider
+func NewOVH(logger logrus.FieldLogger) (providers.Provider, error) {
+	var ovhConfig config
+	if c, ok := viper.GetStringMap("provider")["ovh"].(config); ok {
+		ovhConfig = c
+	} else {
+		return nil, ErrNilOvhConfig
+	}
+
+	if logger == nil {
+		return nil, utils.ErrNilLogger
+	}
+
+	return &ovh{
+		ovhConfig: ovhConfig,
+		logger:    logger,
+	}, nil
+}
+
+func (ovh *ovh) UpdateIP(subdomain, ip string) error {
+	newURL := strings.ReplaceAll(ovh.ovhConfig["url"].(string), "SUBDOMAIN", subdomain)
+	newURL = strings.ReplaceAll(newURL, "NEWIP", ip)
+
+	// * create GET request
+	req, err := http.NewRequest("GET", newURL, nil)
+	if err != nil {
+		return err
+	}
+	req.SetBasicAuth(ovh.ovhConfig["username"].(string), ovh.ovhConfig["password"].(string))
+
+	// * perform GET request
+	c := new(http.Client)
+	resp, err := c.Do(req)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode != 200 {
+		return utils.ErrWrongStatusCode
+	}
+
+	return nil
+}

pkg/providers/ovh/types.go

@@ -0,0 +1,12 @@
+package ovh
+
+import "errors"
+
+type (
+	config map[string]interface{}
+)
+
+var (
+	// ErrNilOvhConfig is thrown when OVH configuration is empty
+	ErrNilOvhConfig = errors.New("OVH config is mandatory")
+)