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| // need this when running in Node.js environment
import { clearTimeout } from 'timers';
import {
// WILDCARD,
// INTERCEPT,
// ASYNC,
INLINE,
TIMEOUT_REJECT
} from './constants';
import Network from './Network';
import AppCtxRoot from './AppCtxRoot';
import AppCtx from './AppCtx';
// import AppCtxHandlers from './AppCtxHandlers';
import { isIterable, concatIterables, _cleanAC } from './utils';
function _removeHandlers(network, acList, handlers, type) {
handlers.forEach(handler =>
acList.forEach(ac => network.removeHandler(ac, handler, type))
);
}
function _createPromiseHandler(
network,
acList,
promiseFn,
timeoutHook,
handlerType
) {
let owner = this;
if (!owner.handlers) {
owner.handlers = [];
}
const acHandler = (ac, data) => {
timeoutHook && timeoutHook();
_removeHandlers(network, acList, owner.handlers, handlerType);
promiseFn({ tao: ac, data });
};
owner.handlers.push(acHandler);
return acHandler;
}
export default class Kernel {
constructor(canSetWildcard = false) {
this._network = new Network();
this._network.use(this.handleAppCon);
this._canSetWildcard = canSetWildcard;
}
get canSetWildcard() {
return this._canSetWildcard;
}
clone(canSetWildcard) {
const cloned = new Kernel(
typeof canSetWildcard !== 'undefined'
? canSetWildcard
: this._canSetWildcard
);
cloned._network = this._network.clone();
return cloned;
}
/**
* What if a Channel is a separate thing that operates a Kernel and uses bridges to the
* main signal network which is the Kernel from which the Channel is made?
*
* @returns
* @memberof Kernel
*/
channel(id, bridge) {
const network = this;
const channel = new Kernel();
// QQQ: does this mean Kernel has to keep track of all bridges?
let debridge = network.inlineBridge(
channel,
control => control.channelId === id,
bridge
);
return {
setCtx({ t, a, o }, data) {
network.setAppCtxControl(new AppCtx(t, a, o, data), { channelId: id });
},
dispose() {
debridge();
}
};
// const channelled = new Kernel();
// channelled._handlers = this._handlers;
// channelled._leaves = this._leaves;
// channelled._wildcards = this._wildcards;
// channelled._canSetWildcard = this._canSetWildcard;
// return channelled;
}
setCtx({ t, term, a, action, o, orient }, data) {
// get the hash for the ac
const acIn = _cleanAC({ t, term, a, action, o, orient });
const isWild = AppCtxRoot.isWildcard(acIn);
if (!this._canSetWildcard && isWild) {
// Ignore or Throw Error?
return;
}
this._network.setCtxControl(acIn, data, {}, (ac, control) =>
this.forwardAppCtx(ac, control)
);
}
setAppCtx(appCtx) {
if (!(appCtx instanceof AppCtx)) {
throw new Error(`'appCtx' not an instance of AppCtx`);
}
const isWild = appCtx.isWildcard;
if (!this._canSetWildcard && isWild) {
// Ignore or Throw Error?
return;
}
this._network.setAppCtxControl(appCtx, {}, (ac, control) =>
this.forwardAppCtx(ac, control)
);
}
forwardAppCtx(ac, control) {
this.setAppCtx(ac, control);
}
handleAppCon(handler, ac, forwardAppCtx, control) {
return handler.handleAppCon(ac, forwardAppCtx, control);
}
asPromiseHook({ resolveOn = [], rejectOn = [] }, timeoutMs = 0) {
// return this._network.asPromiseHook({ resolveOn, rejectOn }, timeoutMs);
const resolvers = isIterable(resolveOn)
? resolveOn
: resolveOn
? [resolveOn]
: [];
const rejectors = isIterable(rejectOn)
? rejectOn
: rejectOn
? [rejectOn]
: [];
if (
!resolvers.length &&
!resolvers.size &&
!rejectors.length &&
!rejectors.size
) {
throw new Error(
'asPromiseHook must be provided with a way to settle the Promise: `resolveOn` or `rejectOn` must have a value'
);
}
const allAcs = concatIterables(resolvers, rejectors);
return ({ t, term, a, action, o, orient }, data) =>
new Promise((resolve, reject) => {
let to = null;
const clearTO = () => to && clearTimeout(to);
const handlerOwner = {};
const resolveHandler = _createPromiseHandler.call(
handlerOwner,
this._network,
allAcs,
resolve,
clearTO,
INLINE
);
resolvers.forEach(ac => this.addInlineHandler(ac, resolveHandler));
const rejectHandler = _createPromiseHandler.call(
handlerOwner,
this._network,
allAcs,
reject,
clearTO,
INLINE
);
rejectors.forEach(ac => this.addInlineHandler(ac, rejectHandler));
if (timeoutMs > 0) {
to = setTimeout(() => {
_removeHandlers(
this._network,
allAcs,
handlerOwner.handlers,
INLINE
);
reject(TIMEOUT_REJECT);
}, timeoutMs);
}
this.setCtx({ t, term, a, action, o, orient }, data);
});
}
addInterceptHandler({ t, term, a, action, o, orient }, handler) {
this._network.addInterceptHandler(
{ t, term, a, action, o, orient },
handler
);
return this;
}
addAsyncHandler({ t, term, a, action, o, orient }, handler) {
this._network.addAsyncHandler({ t, term, a, action, o, orient }, handler);
return this;
}
addInlineHandler({ t, term, a, action, o, orient }, handler) {
this._network.addInlineHandler({ t, term, a, action, o, orient }, handler);
return this;
}
removeInterceptHandler({ t, term, a, action, o, orient }, handler) {
this._network.removeInterceptHandler(
{ t, term, a, action, o, orient },
handler
);
return this;
}
removeAsyncHandler({ t, term, a, action, o, orient }, handler) {
this._network.removeAsyncHandler(
{ t, term, a, action, o, orient },
handler
);
return this;
}
removeInlineHandler({ t, term, a, action, o, orient }, handler) {
this._network.removeInlineHandler(
{ t, term, a, action, o, orient },
handler
);
return this;
}
}
|