add support for specifying custom api url

helpers.go

@@ -7,22 +7,19 @@ import (
 // GetTelegraphClient returns a new TelegraphClient using the specified options.
 func GetTelegraphClient(options *ClientOpt) *TelegraphClient {
 	if options == nil {
-		options = GetDefaultOptions()
+		options = &ClientOpt{}
+	}
+	if options.HttpClient == nil {
+		options.HttpClient = http.DefaultClient
+	}
+	if options.ApiUrl == "" {
+		options.ApiUrl = "https://api.telegra.ph/"
 	}
-
 	return &TelegraphClient{
 		HttpClient: options.HttpClient,
 	}
 }
 
-// GetDefaultOptions returns the default-options used for constructing a
-// TelegraphClient.
-func GetDefaultOptions() *ClientOpt {
-	return &ClientOpt{
-		HttpClient: http.DefaultClient,
-	}
-}
-
 // EditInfo is a helper method to easily call EditAccountInfo by an account.
 func (a *Account) EditInfo(client *TelegraphClient, opts *EditAccountInfoOpts) (*Account, error) {
 	return client.EditAccountInfo(a.AccessToken, opts)

requests.go

@@ -19,7 +19,7 @@ type Body struct {
 }
 
 func (c *TelegraphClient) InvokeRequest(method string, params url.Values) (json.RawMessage, error) {
-	r, err := http.NewRequest(http.MethodPost, "https://api.telegra.ph/"+method, strings.NewReader(params.Encode()))
+	r, err := http.NewRequest(http.MethodPost, c.ApiUrl+method, strings.NewReader(params.Encode()))
 	if err != nil {
 		return nil, fmt.Errorf("failed to build POST request to %s: %w", method, err)
 	}

types.go

@@ -6,12 +6,17 @@ import (
 
 // TelegraphClient is the client that contains all library methods implemented on it.
 type TelegraphClient struct {
+	// Api URL of the Telegraph API.
+	ApiUrl string
 	// HttpClient is the http client used to send http requests to the Telegraph API.
 	HttpClient *http.Client
 }
 
 // ClientOpt is the options used to construct the TelegraphClient value.
 type ClientOpt struct {
+	// Api URL of the Telegraph API.
+	ApiUrl string
+	// HttpClient is the http client used to send http requests to the Telegraph API.
 	HttpClient *http.Client
 }