Serialize GraphQL parameters under variables

api/client.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"io/ioutil"
 	"net/http"
+	"net/url"
 	"regexp"
 	"strings"
 
@@ -212,15 +213,23 @@ func (c Client) DirectRequest(method string, p string, params interface{}, heade
 	url := "https://api.github.com/" + p
 	var body io.Reader
 	var bodyIsJSON bool
+	isGraphQL := p == "graphql"
 
 	switch pp := params.(type) {
 	case map[string]interface{}:
-		b, err := json.Marshal(pp)
-		if err != nil {
-			return nil, fmt.Errorf("error serializing parameters: %w", err)
+		if strings.EqualFold(method, "GET") {
+			url = addQuery(url, pp)
+		} else {
+			if isGraphQL {
+				pp = groupGraphQLVariables(pp)
+			}
+			b, err := json.Marshal(pp)
+			if err != nil {
+				return nil, fmt.Errorf("error serializing parameters: %w", err)
+			}
+			body = bytes.NewBuffer(b)
+			bodyIsJSON = true
 		}
-		body = bytes.NewBuffer(b)
-		bodyIsJSON = true
 	case io.Reader:
 		body = pp
 	default:
@@ -246,6 +255,55 @@ func (c Client) DirectRequest(method string, p string, params interface{}, heade
 	return c.http.Do(req)
 }
 
+func groupGraphQLVariables(params map[string]interface{}) map[string]interface{} {
+	topLevel := make(map[string]interface{})
+	variables := make(map[string]interface{})
+
+	for key, val := range params {
+		switch key {
+		case "query":
+			topLevel[key] = val
+		default:
+			variables[key] = val
+		}
+	}
+
+	if len(variables) > 0 {
+		topLevel["variables"] = variables
+	}
+	return topLevel
+}
+
+func addQuery(path string, params map[string]interface{}) string {
+	if len(params) == 0 {
+		return path
+	}
+
+	query := url.Values{}
+	for key, value := range params {
+		switch v := value.(type) {
+		case string:
+			query.Add(key, v)
+		case []byte:
+			query.Add(key, string(v))
+		case nil:
+			query.Add(key, "")
+		case int:
+			query.Add(key, fmt.Sprintf("%d", v))
+		case bool:
+			query.Add(key, fmt.Sprintf("%v", v))
+		default:
+			panic(fmt.Sprintf("unknown type %v", v))
+		}
+	}
+
+	sep := "?"
+	if strings.ContainsRune(path, '?') {
+		sep = "&"
+	}
+	return path + sep + query.Encode()
+}
+
 func handleResponse(resp *http.Response, data interface{}) error {
 	success := resp.StatusCode >= 200 && resp.StatusCode < 300