smartrx/dist/smartrx.classes.observableintake.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const plugins = require("./smartrx.plugins");
const rxjs_1 = require("rxjs");
/**
 * ObservableIntake
 */
class ObservableIntake {
    constructor() {
        this.observableFunctions = {
            next: (payloadArg) => {
                // nothing
            },
            complete: (payloadArg) => {
                // nothing
            }
        };
        this.generator = null;
        this.buffered = false;
        this.payloadBuffer = [];
        this.observable = rxjs_1.Observable.create((observerArg) => {
            this.observableFunctions.next = (...args) => {
                return observerArg.next(...args);
            };
            this.observableFunctions.complete = (...args) => {
                this.completedDeffered.resolve();
                return observerArg.complete(...args);
            };
        });
        this.completedDeffered = plugins.smartq.defer();
        this.completed = this.completedDeffered.promise;
    }
    setObservable(observableFunc) {
        this.observable = observableFunc();
    }
    push(payloadArg) {
        if (this.buffered) {
            this.payloadBuffer.push(payloadArg);
        }
        else {
            this.internalPush(payloadArg);
        }
    }
    /**
     * pushes many payloads as array
     * @param payloadArgArray
     */
    pushMany(payloadArgArray) {
        for (let item of payloadArgArray) {
            this.push(item);
        }
    }
    /**
     * sets a generator to query the next pushed value
     * @param generatorArg
     */
    setGenerator(generatorArg) {
        this.generator = generatorArg;
    }
    makeBuffered() {
        this.buffered = true;
    }
    subscribe(...args) {
        return this.observable.subscribe(...args);
    }
    /**
     * request the next values in the quantity specified
     * @param howManyArg if a generator is set, of a buffer exists, this allows retrieving values
     */
    request(howManyArg) {
        if (howManyArg === 0) {
            return;
        }
        else {
            for (let i = 0; i !== howManyArg; i++) {
                if (this.payloadBuffer.length > 0) {
                    this.internalPush(this.payloadBuffer.shift());
                }
                else {
                    const nextPayload = this.generator();
                    this.internalPush(nextPayload);
                }
            }
        }
    }
    /**
     * signals the completion of this observable
     */
    signalComplete() {
        this.observableFunctions.complete();
    }
    internalPush(payloadArg) {
        this.observableFunctions.next(payloadArg);
    }
}
exports.ObservableIntake = ObservableIntake;
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