🎨 Update project structure

pkg/internal/services/perms.go

@@ -0,0 +1,63 @@
+package services
+
+import (
+	"fmt"
+	"reflect"
+	"regexp"
+	"strings"
+)
+
+func HasPermNode(perms map[string]any, requiredKey string, requiredValue any) bool {
+	if heldValue, ok := perms[requiredKey]; ok {
+		return ComparePermNode(heldValue, requiredValue)
+	}
+	return false
+}
+
+func ComparePermNode(held any, required any) bool {
+	heldValue := reflect.ValueOf(held)
+	requiredValue := reflect.ValueOf(required)
+
+	switch heldValue.Kind() {
+	case reflect.Int, reflect.Float64:
+		if heldValue.Float() >= requiredValue.Float() {
+			return true
+		}
+	case reflect.String:
+		if heldValue.String() == requiredValue.String() {
+			return true
+		}
+	case reflect.Slice, reflect.Array:
+		for i := 0; i < heldValue.Len(); i++ {
+			if reflect.DeepEqual(heldValue.Index(i).Interface(), required) {
+				return true
+			}
+		}
+	default:
+		if reflect.DeepEqual(held, required) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func FilterPermNodes(tree map[string]any, claims []string) map[string]any {
+	filteredTree := make(map[string]any)
+
+	match := func(claim, permission string) bool {
+		regex := strings.ReplaceAll(claim, "*", ".*")
+		match, _ := regexp.MatchString(fmt.Sprintf("^%s$", regex), permission)
+		return match
+	}
+
+	for _, claim := range claims {
+		for key, value := range tree {
+			if match(claim, key) {
+				filteredTree[key] = value
+			}
+		}
+	}
+
+	return filteredTree
+}