@angular-devkit/schematics
Version:
Angular Schematics - Library
93 lines (92 loc) • 3.09 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.InvalidSourceResultException = exports.InvalidRuleResultException = void 0;
exports.callSource = callSource;
exports.callRule = callRule;
const core_1 = require("@angular-devkit/core");
const rxjs_1 = require("rxjs");
const interface_1 = require("../tree/interface");
function _getTypeOfResult(value) {
if (value === undefined) {
return 'undefined';
}
else if (value === null) {
return 'null';
}
else if (typeof value == 'function') {
return `Function()`;
}
else if (typeof value != 'object') {
return `${typeof value}(${JSON.stringify(value)})`;
}
else {
if (Object.getPrototypeOf(value) == Object) {
return `Object(${JSON.stringify(value)})`;
}
else if (value.constructor) {
return `Instance of class ${value.constructor.name}`;
}
else {
return 'Unknown Object';
}
}
}
/**
* When a rule or source returns an invalid value.
*/
class InvalidRuleResultException extends core_1.BaseException {
constructor(value) {
super(`Invalid rule result: ${_getTypeOfResult(value)}.`);
}
}
exports.InvalidRuleResultException = InvalidRuleResultException;
class InvalidSourceResultException extends core_1.BaseException {
constructor(value) {
super(`Invalid source result: ${_getTypeOfResult(value)}.`);
}
}
exports.InvalidSourceResultException = InvalidSourceResultException;
function callSource(source, context) {
return (0, rxjs_1.defer)(async () => {
let result = source(context);
if ((0, rxjs_1.isObservable)(result)) {
result = await (0, rxjs_1.lastValueFrom)(result.pipe((0, rxjs_1.defaultIfEmpty)(undefined)));
}
if (result && interface_1.TreeSymbol in result) {
return result;
}
throw new InvalidSourceResultException(result);
});
}
function callRule(rule, input, context) {
if ((0, rxjs_1.isObservable)(input)) {
return input.pipe((0, rxjs_1.mergeMap)((inputTree) => callRuleAsync(rule, inputTree, context)));
}
else {
return (0, rxjs_1.defer)(() => callRuleAsync(rule, input, context));
}
}
async function callRuleAsync(rule, tree, context) {
let result = await rule(tree, context);
while (typeof result === 'function') {
// This is considered a Rule, chain the rule and return its output.
result = await result(tree, context);
}
if (typeof result === 'undefined') {
return tree;
}
if ((0, rxjs_1.isObservable)(result)) {
result = await (0, rxjs_1.lastValueFrom)(result.pipe((0, rxjs_1.defaultIfEmpty)(tree)));
}
if (result && interface_1.TreeSymbol in result) {
return result;
}
throw new InvalidRuleResultException(result);
}