tsk-6: Check queue (#12)

Closes #6

Reviewed-on: #12
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/service/auth.go

@@ -0,0 +1,55 @@
+package service
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"git.kundeng.us/phoenix/textsender-models/tx0/token"
+
+	"git.kundeng.us/phoenix/catapult/internal/app"
+)
+
+type Auth struct {
+	Application *app.App
+}
+
+type service struct {
+	Username   string `json:"username"`
+	Passphrase string `json:"passphrase"`
+}
+
+type tokenResponse struct {
+	Message string         `json:"message"`
+	Data    []*token.Login `json:"data"`
+}
+
+func (a *Auth) GetToken() (*token.Login, error) {
+	serv := service{
+		Username:   a.Application.ServiceUsername,
+		Passphrase: a.Application.ServicePassphrase,
+	}
+
+	jsonData, err := json.Marshal(serv)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := http.Post(
+		fmt.Sprintf("%s/api/v1/service/login", a.Application.AuthUrl),
+		"application/json",
+		bytes.NewBuffer(jsonData),
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var r tokenResponse
+	err = json.NewDecoder(resp.Body).Decode(&r)
+	if err != nil {
+		return nil, err
+	}
+
+	return r.Data[0], nil
+}