added model and func to fetch vouchers from the API

internal/handlers/server/accountservice.go

@@ -13,6 +13,7 @@ type AccountServiceInterface interface {
 	CheckBalance(publicKey string) (string, error)
 	CreateAccount() (*models.AccountResponse, error)
 	CheckAccountStatus(trackingId string) (string, error)
+	FetchVouchersFromAPI() ([]models.VoucherHolding, error)
 }
 
 type AccountService struct {
@@ -110,3 +111,31 @@ func (as *AccountService) CreateAccount() (*models.AccountResponse, error) {
 
 	return &accountResp, nil
 }
+
+// fetchVouchersFromAPI calls the API to get the list of vouchers belonging to the user
+func  (as *AccountService) FetchVouchersFromAPI() ([]models.VoucherHolding, error) {
+	// TODO replace with the actual request once ready
+	mockJSON := `[
+		{
+			"symbol": "MUMO",
+			"address": "0x078b3a26596218507781722A4e8825BFB9570Fba"
+		},
+		{
+			"symbol": "SRF",
+			"address": "0x45d747172e77d55575c197CbA9451bC2CD8F4958"
+		},
+		{
+			"symbol": "HALGAN",
+			"address": "0x12169Fb5931A599ad1283bb8311Dad54Feb51A28"
+		}
+	]`
+
+	// Unmarshal the JSON response
+	var holdings []models.VoucherHolding
+	err := json.Unmarshal([]byte(mockJSON), &holdings)
+	if err != nil {
+		return nil, err
+	}
+
+	return holdings, nil
+}

internal/handlers/ussd/menuhandler.go

@@ -231,36 +231,23 @@ func (h *Handlers) SaveTemporaryPin(ctx context.Context, sym string, input []byt
 	return res, nil
 }
 
+// GetVoucherList fetches the list of vouchers and formats them
+// checks whether they are synced internally before calling the API
 func (h *Handlers) GetVoucherList(ctx context.Context, sym string, input []byte) (resource.Result, error) {
 	var res resource.Result
-	vouchers := []string{
-		"SRF",
-		"CRF",
-		"VCF",
-		"VSAPA",
-		"FSTMP",
-		"FSAW",
-		"PTAQ",
-		"VCRXT",
-		"VSGAQ",
-		"QPWIQQ",
-		"FSTMP",
-		"FSAW",
-		"PTAQ",
-		"VCRXT",
-		"VSGAQ",
-		"QPWIQQ",
-		"FSTMP",
-		"FSAW",
-		"PTAQ",
-		"VCRXT",
-		"VSGAQ",
-		"QPWIQQ",
+
+	// check if the vouchers exist internally and if not
+	// fetch from the API
+
+	// Fetch vouchers from API
+	vouchers, err := h.accountService.FetchVouchersFromAPI()
+	if err != nil {
+		return res, fmt.Errorf("error fetching vouchers: %w", err)
 	}
 
 	var numberedVouchers []string
 	for i, voucher := range vouchers {
-		numberedVouchers = append(numberedVouchers, fmt.Sprintf("%d:%s", i+1, voucher))
+		numberedVouchers = append(numberedVouchers, fmt.Sprintf("%d:%s", i+1, voucher.Symbol))
 	}
 	res.Content = strings.Join(numberedVouchers, "\n")
 

internal/mocks/servicemock.go

@@ -23,4 +23,9 @@ func (m *MockAccountService) CheckBalance(publicKey string) (string, error) {
 func (m *MockAccountService) CheckAccountStatus(trackingId string) (string, error) {
 	args := m.Called(trackingId)
 	return args.String(0), args.Error(1)
-}
+}
+
+func (m *MockAccountService) FetchVouchersFromAPI() ([]models.VoucherHolding, error) {
+	args := m.Called()
+	return args.Get(0).([]models.VoucherHolding), args.Error(1)
+}

internal/models/vouchersresponse.go

@@ -0,0 +1,7 @@
+package models
+
+// VoucherHolding represents a single voucher holding
+type VoucherHolding struct {
+	Symbol  string `json:"symbol"`
+	Address string `json:"address"`
+}