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"use strict";
/**
* @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.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.callRule = exports.callSource = exports.InvalidSourceResultException = exports.InvalidRuleResultException = void 0;
const core_1 = require("@angular-devkit/core");
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
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) {
const result = source(context);
if ((0, rxjs_1.isObservable)(result)) {
// Only return the last Tree, and make sure it's a Tree.
return result.pipe((0, operators_1.defaultIfEmpty)(), (0, operators_1.last)(), (0, operators_1.tap)((inner) => {
if (!inner || !(interface_1.TreeSymbol in inner)) {
throw new InvalidSourceResultException(inner);
}
}));
}
else if (result && interface_1.TreeSymbol in result) {
return (0, rxjs_1.of)(result);
}
else {
return (0, rxjs_1.throwError)(new InvalidSourceResultException(result));
}
}
exports.callSource = callSource;
function callRule(rule, input, context) {
return ((0, rxjs_1.isObservable)(input) ? input : (0, rxjs_1.of)(input)).pipe((0, operators_1.mergeMap)((inputTree) => {
const result = rule(inputTree, context);
if (!result) {
return (0, rxjs_1.of)(inputTree);
}
else if (typeof result == 'function') {
// This is considered a Rule, chain the rule and return its output.
return callRule(result, inputTree, context);
}
else if ((0, rxjs_1.isObservable)(result)) {
// Only return the last Tree, and make sure it's a Tree.
return result.pipe((0, operators_1.defaultIfEmpty)(), (0, operators_1.last)(), (0, operators_1.tap)((inner) => {
if (!inner || !(interface_1.TreeSymbol in inner)) {
throw new InvalidRuleResultException(inner);
}
}));
}
else if ((0, core_1.isPromise)(result)) {
return (0, rxjs_1.from)(result).pipe((0, operators_1.mergeMap)((inner) => {
if (typeof inner === 'function') {
// This is considered a Rule, chain the rule and return its output.
return callRule(inner, inputTree, context);
}
else {
return (0, rxjs_1.of)(inputTree);
}
}));
}
else if (interface_1.TreeSymbol in result) {
return (0, rxjs_1.of)(result);
}
else {
return (0, rxjs_1.throwError)(new InvalidRuleResultException(result));
}
}));
}
exports.callRule = callRule;
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