@directus/api/dist/utils/get-field-relational-depth.js

Directus is a real-time API and App dashboard for managing SQL database content

//#region src/utils/get-field-relational-depth.ts
/**
* Counts the number of relational segments in a field path. Handles function syntax
* (e.g. json(), year()) by counting relational segments in the prefix and in the first argument
* separately, while ignoring subsequent arguments (e.g. json paths).
*
* @example
* getFieldRelationalDepth('a.b.c')                              // 3
* getFieldRelationalDepth('year(user.date_created)')            // 2
* getFieldRelationalDepth('category_id.json(metadata, a.b.c)') // 2
* getFieldRelationalDepth('json(a.b.field, some.path)')         // 3
* getFieldRelationalDepth('json(metadata, path.to.value)')      // 1
*/
function getFieldRelationalDepth(field) {
	const openParenIndex = field.indexOf("(");
	if (openParenIndex === -1) return field.split(".").length;
	const functionDepth = field.slice(0, openParenIndex).split(".").length - 1;
	const commaIndex = field.indexOf(",", openParenIndex);
	return functionDepth + field.slice(openParenIndex, commaIndex).split(".").length;
}

//#endregion
export { getFieldRelationalDepth };