restructure and process additions and deleteions of relationships, roles and memberships

internal/permissions/relationships.go

@@ -0,0 +1,71 @@
+package permissions
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"go.infratographer.com/x/gidx"
+)
+
+type resourceRelationship struct {
+	ResourceID string `json:"resource_id"`
+	Relation   string `json:"relation"`
+	SubjectID  string `json:"subject_id"`
+}
+
+type ResourceRelationship struct {
+	ResourceID gidx.PrefixedID
+	Relation   string
+	SubjectID  gidx.PrefixedID
+}
+
+func (c *Client) ListResourceRelationships(ctx context.Context, resourceID gidx.PrefixedID, relatedResourceType string) ([]ResourceRelationship, error) {
+	query := url.Values{
+		"resourceType": []string{relatedResourceType},
+	}
+
+	url := url.URL{
+		Path:     fmt.Sprintf("/api/v1/resources/%s/relationships", resourceID.String()),
+		RawQuery: query.Encode(),
+	}
+
+	var response struct {
+		Data []resourceRelationship `json:"data"`
+	}
+
+	if _, err := c.DoRequest(ctx, http.MethodGet, url.String(), nil, &response); err != nil {
+		return nil, err
+	}
+
+	data := make([]ResourceRelationship, len(response.Data))
+	for i, entry := range response.Data {
+		var (
+			resID, subID gidx.PrefixedID
+			err          error
+		)
+
+		if entry.ResourceID != "" {
+			resID, err = gidx.Parse(entry.ResourceID)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		if entry.SubjectID != "" {
+			subID, err = gidx.Parse(entry.SubjectID)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		data[i] = ResourceRelationship{
+			ResourceID: resID,
+			Relation:   entry.Relation,
+			SubjectID:  subID,
+		}
+	}
+
+	return data, nil
+}