Initial commit

README.md

@@ -0,0 +1 @@
+# PalAuth IAM Go client

check.go

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+package palauthiam
+
+import "context"
+
+type CheckPermissionRequest struct {
+	UserID string
+	Permission string
+}
+
+type CheckPermissionResponse struct {
+	Allowed bool `json:"allowed"`
+}
+
+func (c *PalAuthIAMClient) CheckPermission(ctx context.Context, request *CheckPermissionRequest) (bool, error) {
+	resp := CheckPermissionResponse{}
+	err := c.getRequest(ctx, "/check", map[string]string{
+		"userId": request.UserID,
+		"permission": request.Permission,
+	}, &resp)
+
+	if err != nil {
+		return false, err
+	}
+
+	return resp.Allowed, nil
+}

client.go

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+package palauthiam
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+)
+
+type PalAuthIAMClient struct {
+	clientId string
+	clientSecret string
+	baseURL string
+}
+
+func InitClient(clientId, clientSecret string) *PalAuthIAMClient {
+	return &PalAuthIAMClient{
+		clientId: clientId,
+		clientSecret: clientSecret,
+		baseURL: "https://auth.palk.me/iam",
+	}
+}
+
+func (c *PalAuthIAMClient) SetBaseURL(baseURL string) {
+	c.baseURL = baseURL
+}
+
+func mapToQuery(variables map[string]string) (output string) {
+	for key, value := range variables {
+		output += fmt.Sprintf("%s=%s&", key, value)
+	}
+
+	if len(variables) != 0 {
+		output = strings.TrimSuffix(output, "&")
+	}
+	return output
+}
+
+func (c *PalAuthIAMClient) buildURL(path string, query map[string]string) string {
+	return fmt.Sprintf("%s%s?%s", c.baseURL, path, mapToQuery(query))
+}
+
+func (c *PalAuthIAMClient) runRequest(req *http.Request, mapTo interface{}) error {
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("making request: %s", err)
+	}
+
+	resBody, err := io.ReadAll(res.Body)
+	if err != nil {
+		return fmt.Errorf("read response body: %s", err)
+	}
+
+	if res.StatusCode >= 200 && res.StatusCode < 300 {
+		err = json.Unmarshal(resBody, mapTo)
+		if err != nil {
+			return fmt.Errorf("decode JSON response: %s", err)
+		}
+	} else if res.StatusCode >= 400 && res.StatusCode < 500 {
+		return &IAMError{
+			ServerMessage: string(resBody),
+		}
+	}
+
+	return nil
+}
+
+func (c *PalAuthIAMClient) getRequest(
+	ctx context.Context,
+	path string,
+	variables map[string]string,
+	mapTo interface{},
+) error {
+	req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodGet,
+		c.buildURL(path, variables),
+		http.NoBody,
+	)
+	if err != nil {
+		return fmt.Errorf("construct request: %s", err)
+	}
+
+	return c.runRequest(req, mapTo)
+}

errors.go

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+package palauthiam
+
+import "fmt"
+
+type IAMError struct {
+	ServerMessage string
+}
+
+func (r *IAMError) Error() string {
+	return fmt.Sprintf("iam error: %s", r.ServerMessage)
+}

go.mod

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+module gitlab.palk.me/paltiverse/palauth-iam-go
+
+go 1.21.1

types.go

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+package palauthiam
+
+type IAMPermission string