@data-client/normalizr
Version:
Normalizes and denormalizes JSON according to schema for Redux and Flux applications
28 lines (27 loc) • 5.25 kB
JavaScript
const validateSchema = definition => {
/* istanbul ignore else */
if (process.env.NODE_ENV !== 'production') {
const isArray = Array.isArray(definition);
if (isArray && definition.length > 1) {
throw new Error(`Expected schema definition to be a single schema, but found ${definition.length}.`);
}
}
return definition[0];
};
const getValues = input => Array.isArray(input) ? input : Object.keys(input).map(key => input[key]);
const filterEmpty = item => item !== undefined && typeof item !== 'symbol';
export const normalize = (schema, input, parent, key, args, visit) => {
schema = validateSchema(schema);
const values = getValues(input);
// Special case: Arrays pass *their* parent on to their children, since there
// is not any special information that can be gathered from themselves directly
return values.map(value => visit(schema, value, parent, key, args));
};
export const denormalize = (schema, input, args, unvisit) => {
schema = validateSchema(schema);
return input.map ? input.map(entityOrId => unvisit(schema, entityOrId)).filter(filterEmpty) : input;
};
export function queryKey() {
return undefined;
}
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