@ng-doc/builder/engine/core/operators/merge-factory.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.mergeFactory = mergeFactory;
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const types_1 = require("../types");
const builder_state_1 = require("./builder-state");
const handle_cache_strategy_1 = require("./handle-cache-strategy");
let builderId = 0;
/**
 *
 * @param tag
 * @param sources
 * @param project
 * @param cacheStrategy
 * @param mapper
 */
function mergeFactory(tag, sources, project, cacheStrategy, mapper) {
    const id = builderId++;
    const buffer = new Array(sources.length);
    return (0, rxjs_1.merge)(...sources.map((source, i) => (0, rxjs_1.from)(source).pipe((0, operators_1.map)((value) => [i, value])))).pipe((0, rxjs_1.switchMap)(([i, value]) => {
        buffer[i] = value;
        const valueMapper = () => {
            if (!mapper || !(0, types_1.isBuilderDone)(value)) {
                return value;
            }
            return new types_1.BuilderDone(value.tag, mapper(value.result), value.fromCache);
        };
        const mappedValue = valueMapper();
        if (buffer.every(types_1.isBuilderDone)) {
            const results = buffer.map(({ result }) => result);
            const buildFn = (0, rxjs_1.from)(project(...results)).pipe((0, builder_state_1.builderState)(tag), (0, handle_cache_strategy_1.handleCacheStrategy)(`mergeFactory${id}`, cacheStrategy, buffer.every(({ fromCache }) => fromCache)));
            return (0, rxjs_1.merge)((0, rxjs_1.of)(mappedValue), buildFn);
        }
        return (0, rxjs_1.of)(mappedValue);
    }));
}
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