@pushrocks/smartrx
Version:
smart wrapper for rxjs
94 lines • 5.59 kB
JavaScript
import * as plugins from './smartrx.plugins.js';
import * as rxjs from './smartrx.plugins.rxjs.js';
/**
* ObservableIntake
*/
export class ObservableIntake {
constructor() {
this.observableFunctions = {
next: (payloadArg) => {
// nothing
},
complete: (payloadArg) => {
// nothing
},
};
this.generator = null;
this.buffered = false;
this.payloadBuffer = [];
this.observable = new rxjs.Observable((observerArg) => {
this.observableFunctions.next = (...args) => {
return observerArg.next(args);
};
this.observableFunctions.complete = () => {
this.completedDeffered.resolve();
return observerArg.complete();
};
});
this.completedDeffered = plugins.smartpromise.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 (const 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.next();
this.internalPush(nextPayload.value);
}
}
}
}
/**
* signals the completion of this observable
*/
signalComplete() {
this.observableFunctions.complete();
}
internalPush(payloadArg) {
this.observableFunctions.next(payloadArg);
}
}
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