@directus/api/dist/utils/reduce-schema.js

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

//#region src/utils/reduce-schema.ts
/**
* Reduces the schema based on the included permissions. The resulting object is the schema structure, but with only
* the allowed collections/fields/relations included based on the passed field map.
*/
function reduceSchema(schema, fieldMap) {
	const reduced = {
		collections: {},
		relations: []
	};
	for (const [collectionName, collection] of Object.entries(schema.collections)) {
		if (!fieldMap[collectionName]) continue;
		const fields = {};
		for (const [fieldName, field] of Object.entries(schema.collections[collectionName].fields)) {
			if (!fieldMap[collectionName]?.includes("*") && !fieldMap[collectionName]?.includes(fieldName)) continue;
			if (schema.relations.find((relation) => relation.related_collection === collectionName && relation.meta?.one_field === fieldName) && !fieldMap[collectionName]) continue;
			fields[fieldName] = field;
		}
		reduced.collections[collectionName] = {
			...collection,
			fields
		};
	}
	reduced.relations = schema.relations.filter((relation) => {
		let collectionsAllowed = true;
		let fieldsAllowed = true;
		if (Object.keys(fieldMap).includes(relation.collection) === false) collectionsAllowed = false;
		if (relation.related_collection && (Object.keys(fieldMap).includes(relation.related_collection) === false || fieldMap[relation.related_collection]?.length === 0)) collectionsAllowed = false;
		if (relation.meta?.one_allowed_collections && relation.meta.one_allowed_collections.every((collection) => Object.keys(fieldMap).includes(collection)) === false) collectionsAllowed = false;
		if (!fieldMap[relation.collection] || fieldMap[relation.collection]?.includes("*") === false && fieldMap[relation.collection]?.includes(relation.field) === false) fieldsAllowed = false;
		if (relation.related_collection && relation.meta?.one_field && (!fieldMap[relation.related_collection] || fieldMap[relation.related_collection]?.includes("*") === false && fieldMap[relation.related_collection]?.includes(relation.meta?.one_field) === false)) fieldsAllowed = false;
		return collectionsAllowed && fieldsAllowed;
	});
	return reduced;
}

//#endregion
export { reduceSchema };