@synerty/vortexjs
Version:
Custom observable data serialisation and routing based on Angular 2+
106 lines • 13.2 kB
JavaScript
import { payloadIO } from "./PayloadIO";
import { assert, dateStr, dictKeysFromObject } from "./UtilMisc";
import "./UtilArray";
import { Subject } from "rxjs";
export class PayloadEndpoint {
_filt;
_lastPayloadDate;
_processLatestOnly;
constructor(component, filter, processLatestOnly = false) {
let self = this;
self._filt = filter;
self._lastPayloadDate = null;
self._processLatestOnly = processLatestOnly === true;
assert(self._filt != null, "Payload filter is null");
if (self._filt.key == null) {
let e = new Error(`There is no 'key' in the payload filt \
, There must be one for routing - ${JSON.stringify(self._filt)}`);
console.log(e);
throw e;
}
payloadIO.add(self);
// Add auto tear downs for angular scopes
let subscription = component.onDestroyEvent.subscribe(() => {
this.shutdown();
subscription.unsubscribe();
});
this._observable = new Subject();
}
_observable;
get observable() {
return this._observable;
}
/**
* Process Payload
* Check if the payload is meant for us then process it.
*
* @return null, or if the function is overloaded, you could return STOP_PROCESSING
* from PayloadIO, which will tell it to stop processing further endpoints.
*/
process(payloadEnvelope) {
if (!this.checkFilt(this._filt, payloadEnvelope.filt))
return null;
if (!this.checkDate(payloadEnvelope))
return null;
try {
this._observable.next(payloadEnvelope);
}
catch (e) {
// NOTE: Observables automatically remove observers when the raise exceptions.
console.log(`${dateStr()} ERROR: PayloadEndpoint.process, observable has been removed
${e.toString()}
${JSON.stringify(payloadEnvelope.filt)}`);
}
return null;
}
shutdown() {
let self = this;
payloadIO.remove(self);
if (this._observable["observers"] != null) {
for (let observer of this._observable["observers"]) {
observer["unsubscribe"]();
}
}
}
checkFilt(leftFilt, rightFilt) {
for (let key of dictKeysFromObject(leftFilt, true)) {
if (!rightFilt.hasOwnProperty(key))
return false;
let left = leftFilt[key];
let right = rightFilt[key];
// Handle the case of null !== undefined
if (left == null && right == null)
return true;
if (typeof left !== typeof right)
return false;
// Handle special case for Arrays using our equals method in ArrayUtil
if (left instanceof Array) {
if (left.sort().equals(right.sort()))
continue;
else
return false;
}
// Handle special case for Arrays using our equals method in ArrayUtil
if (left instanceof Object) {
if (this.checkFilt(left, right))
continue;
else
return false;
}
if (left !== right)
return false;
}
return true;
}
checkDate(payload) {
if (this._processLatestOnly) {
if (this._lastPayloadDate == null ||
this._lastPayloadDate < payload.date)
this._lastPayloadDate = payload.date;
else
return false;
}
return true;
}
}
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${JSON.stringify(\n                    self._filt\n                )}`);\n            console.log(e);\n            throw e;\n        }\n\n        payloadIO.add(self);\n\n        // Add auto tear downs for angular scopes\n        let subscription = component.onDestroyEvent.subscribe(() => {\n            this.shutdown();\n            subscription.unsubscribe();\n        });\n\n        this._observable = new Subject<PayloadEnvelope>();\n    }\n\n    private _observable: Subject<PayloadEnvelope>;\n\n    get observable(): Observable<PayloadEnvelope> {\n        return this._observable;\n    }\n\n    /**\n     * Process Payload\n     * Check if the payload is meant for us then process it.\n     *\n     * @return null, or if the function is overloaded, you could return STOP_PROCESSING\n     * from PayloadIO, which will tell it to stop processing further endpoints.\n     */\n    process(payloadEnvelope: PayloadEnvelope): null | string {\n        if (!this.checkFilt(this._filt, payloadEnvelope.filt)) return null;\n\n        if (!this.checkDate(payloadEnvelope)) return null;\n\n        try {\n            this._observable.next(payloadEnvelope);\n        } catch (e) {\n            // NOTE: Observables automatically remove observers when the raise exceptions.\n            console.log(`${dateStr()} ERROR: PayloadEndpoint.process, observable has been removed\n            ${e.toString()}\n            ${JSON.stringify(payloadEnvelope.filt)}`);\n        }\n\n        return null;\n    }\n\n    shutdown() {\n        let self = this;\n        payloadIO.remove(self);\n        if (this._observable[\"observers\"] != null) {\n            for (let observer of this._observable[\"observers\"]) {\n                observer[\"unsubscribe\"]();\n            }\n        }\n    }\n\n    private checkFilt(leftFilt, rightFilt): boolean {\n        for (let key of dictKeysFromObject(leftFilt, true)) {\n            if (!rightFilt.hasOwnProperty(key)) return false;\n\n            let left = leftFilt[key];\n            let right = rightFilt[key];\n\n            // Handle the case of null !== undefined\n            if (left == null && right == null) return true;\n\n            if (typeof left !== typeof right) return false;\n\n            // Handle special case for Arrays using our equals method in ArrayUtil\n            if (left instanceof Array) {\n                if (left.sort().equals(right.sort())) continue;\n                else return false;\n            }\n\n            // Handle special case for Arrays using our equals method in ArrayUtil\n            if (left instanceof Object) {\n                if (this.checkFilt(left, right)) continue;\n                else return false;\n            }\n\n            if (left !== right) return false;\n        }\n\n        return true;\n    }\n\n    private checkDate(payload): boolean {\n        if (this._processLatestOnly) {\n            if (\n                this._lastPayloadDate == null ||\n                this._lastPayloadDate < payload.date\n            )\n                this._lastPayloadDate = payload.date;\n            else return false;\n        }\n\n        return true;\n    }\n}\n"]}