@vendure/common
Version:
86 lines • 2.83 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.notNullOrUndefined = notNullOrUndefined;
exports.assertNever = assertNever;
exports.isObject = isObject;
exports.isClassInstance = isClassInstance;
exports.summate = summate;
exports.generateAllCombinations = generateAllCombinations;
exports.getGraphQlInputName = getGraphQlInputName;
/**
* Predicate with type guard, used to filter out null or undefined values
* in a filter operation.
*/
function notNullOrUndefined(val) {
return val !== undefined && val !== null;
}
/**
* Used in exhaustiveness checks to assert a codepath should never be reached.
*/
function assertNever(value) {
throw new Error(`Expected never, got ${typeof value} (${JSON.stringify(value)})`);
}
/**
* Simple object check.
* From https://stackoverflow.com/a/34749873/772859
*/
function isObject(item) {
return item && typeof item === 'object' && !Array.isArray(item);
}
function isClassInstance(item) {
// Even if item is an object, it might not have a constructor as in the
// case when it is a null-prototype object, i.e. created using `Object.create(null)`.
return isObject(item) && item.constructor && item.constructor.name !== 'Object';
}
/**
* Adds up all the values of a given numeric property of a list of objects.
*/
function summate(items, prop) {
return (items || []).reduce((sum, i) => sum + i[prop], 0);
}
/**
* Given an array of option arrays `[['red, 'blue'], ['small', 'large']]`, this method returns a new array
* containing all the combinations of those options:
*
* @example
* ```
* generateAllCombinations([['red, 'blue'], ['small', 'large']]);
* // =>
* // [
* // ['red', 'small'],
* // ['red', 'large'],
* // ['blue', 'small'],
* // ['blue', 'large'],
* // ]
*/
function generateAllCombinations(optionGroups, combination = [], k = 0, output = []) {
if (k === 0) {
optionGroups = optionGroups.filter(g => 0 < g.length);
}
if (k === optionGroups.length) {
output.push(combination);
return [];
}
else {
/* eslint-disable @typescript-eslint/prefer-for-of */
for (let i = 0; i < optionGroups[k].length; i++) {
generateAllCombinations(optionGroups, combination.concat(optionGroups[k][i]), k + 1, output);
}
/* eslint-enable @typescript-eslint/prefer-for-of */
return output;
}
}
/**
* @description
* Returns the input field name of a custom field, taking into account that "relation" type custom
* field inputs are suffixed with "Id" or "Ids".
*/
function getGraphQlInputName(config) {
if (config.type === 'relation') {
return config.list === true ? `${config.name}Ids` : `${config.name}Id`;
}
else {
return config.name;
}
}
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