chore(all): move sub-packages to internal/provider

internal/provider/windscribe/updater/api.go

@@ -0,0 +1,69 @@
+package windscribe
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+var (
+	ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
+)
+
+type apiData struct {
+	Data []regionData `json:"data"`
+}
+
+type regionData struct {
+	Region string      `json:"name"`
+	Groups []groupData `json:"groups"`
+}
+
+type groupData struct {
+	City     string       `json:"city"`
+	Nodes    []serverData `json:"nodes"`
+	OvpnX509 string       `json:"ovpn_x509"`
+	WgPubKey string       `json:"wg_pubkey"`
+}
+
+type serverData struct {
+	Hostname string `json:"hostname"`
+	IP       net.IP `json:"ip"`
+	IP2      net.IP `json:"ip2"`
+	IP3      net.IP `json:"ip3"`
+}
+
+func fetchAPI(ctx context.Context, client *http.Client) (
+	data apiData, err error) {
+	const baseURL = "https://assets.windscribe.com/serverlist/mob-v2/1/"
+	cacheBreaker := time.Now().Unix()
+	url := baseURL + strconv.Itoa(int(cacheBreaker))
+
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return data, err
+	}
+
+	response, err := client.Do(request)
+	if err != nil {
+		return data, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode != http.StatusOK {
+		return data, fmt.Errorf("%w: %d %s", ErrHTTPStatusCodeNotOK,
+			response.StatusCode, response.Status)
+	}
+
+	decoder := json.NewDecoder(response.Body)
+	if err := decoder.Decode(&data); err != nil {
+		return data, fmt.Errorf("failed unmarshaling response body: %w", err)
+	}
+
+	return data, nil
+}