feat: Introduce generic auth steps

packages/web/src/helpers/computeAuthStepVariables.ts

@@ -0,0 +1,25 @@
+import template from 'lodash.template';
+
+const interpolate = /{([\s\S]+?)}/g;
+
+type VARIABLES = {
+  [key: string]: any
+}
+
+const computeAuthStepVariables = (authStep: any, aggregatedData: any) => {
+  const variables: VARIABLES = {};
+
+  for (const field of authStep.fields) {
+    if (field.fields) {
+      variables[field.name] = computeAuthStepVariables(field, aggregatedData);
+
+      continue;
+    }
+
+    variables[field.name] = template(field.value, { interpolate })(aggregatedData);
+  }
+
+  return variables;
+};
+
+export default computeAuthStepVariables;