add arango package with aql generation

params.go

@@ -0,0 +1,22 @@
+package arango
+
+import (
+	"regexp"
+)
+
+// https://docs.arangodb.com/3.11/aql/fundamentals/bind-parameters/#syntax
+var paramRegexp = regexp.MustCompile("@{1,2}([A-z0-9_]+)")
+
+// ReadParams reads out named parameters from an AQL string.
+func ReadParams(input string) []string {
+	params := []string{}
+
+	matches := paramRegexp.FindAllStringSubmatch(input, -1)
+	if matches != nil {
+		for _, match := range matches {
+			params = append(params, match[1])
+		}
+	}
+
+	return params
+}