@ng-doc/builder/engine/core/operators/join-builder-states.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.joinBuilderStates = joinBuilderStates;
const core_1 = require("@ng-doc/core");
const rxjs_1 = require("rxjs");
const types_1 = require("../types");
/**
 *
 * @param tag
 * @param states
 * @param project
 */
function joinBuilderStates(tag, states, project) {
    /**
     * If any of the states are pending, return an Observable of BuilderPending.
     */
    if (states.some(types_1.isBuilderPending)) {
        return (0, rxjs_1.of)(new types_1.BuilderPending(tag));
    }
    const errors = states.filter(types_1.isBuilderError);
    /**
     * If there are any errors in the states, return an Observable of BuilderError.
     */
    if (errors.length) {
        return (0, rxjs_1.of)(new types_1.BuilderError(tag, (0, core_1.asArray)(...errors.map(({ error }) => error))));
    }
    return project(...states.map(({ result }) => result));
}
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