0.1.7
modify toBoolean to accept a packet with ready/online/active properties make available via instance refector to keep the 'all' combination separate from combineObserver add 'all' getter add combinations getter add private method _combineAllmaster
David Kebler
parent
2497321c66
commit
333d565894
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@ -1,16 +1,10 @@
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import { Observable } from 'rxjs'
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import { Ready, changed, map, tap} from '../src/ready'
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import { Ready } from '../src/ready'
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import { EventEmitter } from 'events'
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let emitter = new EventEmitter()
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// let verbose = process.env.VERBOSE==='true'
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let combo = true
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// handler: (r)=> console.log('result:',r)
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const late=3000
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const late=500
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let example = new Ready({emitter: emitter})
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@ -27,82 +21,32 @@ let subscribe = ()=>{
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if (!late) subscribe()
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else setTimeout(subscribe,late)
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const tObs = new Observable(subscriber => {
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subscriber.next('on')
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subscriber.next('off')
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subscriber.next('enabled')
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setTimeout(() => {
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subscriber.next('F')
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}, 7000)
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setTimeout(() => {
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subscriber.next('T')
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}, 8000)
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})
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example.addObserver('obs',tObs,{details:{desc:'this is a constructed observable from the Observable Class'}})
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const tPromise = new Promise(function(resolve) {
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setTimeout(()=>{
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console.log('promise observer is resolving')
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resolve('yes')
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example.addObserver('a',{details:{desc:'this is the a observer which comes from an emitter'}})
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// .subscribe(ev=>{console.log('a',ev)})
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example.addObserver('b')
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// .subscribe(ev=>{console.log('b',ev)})
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example.addObserver('c')
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// .subscribe(ev=>{console.log('c',ev)})
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console.log(' observers added>',example.observers)
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example.combineObservers('a:b',['a','b']).subscribe(ready=>console.log('ab combo state>',ready))
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console.log('-------------emitting, b true -----------------')
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emitter.emit('b',true)
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console.log('-------------emitting, c true -----------------')
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emitter.emit('c',true)
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console.log('===============done emitting =================')
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setTimeout(async () => {
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console.log('============emitting a true after 1 sec===================')
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emitter.emit('a',true)
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},1000)
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})
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example.addObserver('e',{details:{desc:'this is the e observer which comes from an emitter'}})
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example.addObserver('ce',{condition: (ev)=>ev.ready, event:'ec'})
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example.addObserver('pe',emitter)
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example.addObserver('pr',tPromise)
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example.addObserver('extnd',example.getObserver('e').pipe(
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map(state => {
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// console.log('+++++++++++\n','extend before:',state)
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if (state) {
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let val = Math.floor(Math.random() * Math.floor(10))
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// console.log(val)
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state = val <11 ? true:false
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}
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// console.log('extend after:',state,'\n-------------')
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return state
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})
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),{details:'an observer extension of the e observer'})
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if (combo) {
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let combo = example.combineObservers('combo',['e','pr'])
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.pipe(
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tap(state=>console.log('combo e and pr state:',state)),
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changed() // only emit if changed
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)
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if (combo){
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console.log('a combination of e and pr was made\n','combinations are not added to \'all\' list')
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console.log('subscribing to sub combination e, pr')
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example.subscribe('combo',val => console.log('combo e, pr is:',val))
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}
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}
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let madeonly = example.makeObserver('madeonly')
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console.log('observer \'madeonly\' was only made and was not added so not in list \n',madeonly)
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console.log('list of observers made and added to the all combination\n',example.observerNames)
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emitter.emit('ec',{ready:true})
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emitter.emit('pe','yup')
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emitter.emit('e')
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console.log('===============done initial emitting, pe,e,ec/ce=================')
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setTimeout(async () => {
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console.log('============emitting e, pe false===================')
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example.setObserverDetails('e',{moreinfo:'an additional property of details added later'})
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emitter.emit('e',false)
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emitter.emit('pe',false)
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}
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,2000)
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setTimeout(async () => {
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console.log('=================emitting e true, removing pe which is false ================')
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emitter.emit('e',true)
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example.removeObserver('pe')
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}
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,4000)
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console.log('============emitting a false after 2 sec===================')
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emitter.emit('a',false)
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setTimeout(async () => {console.log('timeout done')},6000)
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},2000)
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setTimeout(async () => {
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console.log('============removing a after 3 sec===================')
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example.removeObserver('a')
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console.log('observers after removal>',example.observers)
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},3000)
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setTimeout(async () => {console.log('timeout done');process.exit()},10000)
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@ -0,0 +1,117 @@
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import { Observable } from 'rxjs'
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import { Ready, readyChanged as changed, map, tap} from '../src/ready'
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import { EventEmitter } from 'events'
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let emitter = new EventEmitter()
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// let verbose = process.env.VERBOSE==='true'
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let combo = false
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const late=3000
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let example = new Ready({emitter: emitter})
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console.log('bound change function for use in customized observer', changed)
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console.log('Boolean TEST: {online:\'yes\'}',example.toBoolean({online:'yes'}))
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console.log('Boolean TEST: \'yes\'',example.toBoolean('yes'))
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let subscribe = ()=>{
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console.log('subscribing at',late, 'ms')
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example.subscribe(ready => {
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console.log(`-----------Subscriber at ${late} ms--------------?`,ready)
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console.log('the failed observer:', example.failure, ',details:', example.getObserverDetails(example.failure))
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console.log('the total state', example.state)
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console.log('---------------------------------------')
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})
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}
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if (!late) subscribe()
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else setTimeout(subscribe,late)
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const tObs = new Observable(subscriber => {
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subscriber.next('on')
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subscriber.next('off')
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subscriber.next('enabled')
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setTimeout(() => {
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subscriber.next('F')
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}, 7000)
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setTimeout(() => {
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subscriber.next('T')
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}, 8000)
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})
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example.addObserver('obs',tObs,{details:{desc:'this is a constructed observable from the Observable Class'}})
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const tPromise = new Promise(function(resolve) {
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setTimeout(()=>{
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console.log('promise observer is resolving')
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resolve('yes')
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},1000)
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})
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example.addObserver('e',{details:{desc:'this is the e observer which comes from an emitter'}})
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// example.addObserver('ce',{condition: (ev)=>ev.ready, event:'ec'})
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example.addObserver('ce',{event:'ec'})
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example.addObserver('pe',emitter)
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example.addObserver('pr',tPromise)
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example.addObserver('extnd',example.getObserver('e').pipe(
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map(state => {
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// console.log('+++++++++++\n','extend before:',state)
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if (state) {
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let val = Math.floor(Math.random() * Math.floor(10))
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// console.log(val)
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state = val <11 ? true:false
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}
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// console.log('extend after:',state,'\n-------------')
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return state
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})
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),{details:'an observer extension of the e observer'})
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let madeonly = example.makeObserver({event:'madeonly'})
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madeonly ? console.log('observer \'madeonly\' was only made and was not added so won\'t appear in \'all\' list')
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: console.log('made observer failed')
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console.log('list of observers made and added to the all combination\n',example.observers)
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if (combo) {
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let combo = example.combineObservers('combo',['e','pr'])
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.pipe(
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tap(state=>console.log('++++++++++++++ tap log of extened combo e and pr state:+++++++++++++++',state)),
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)
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if (combo){
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example.subscribe('e', ready => console.log('e',ready))
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example.subscribe('e', ready => console.log('pr',ready))
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console.log('a combination name \'combo\' made of e and pr was created')
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console.log('now subscribing to combination e, pr')
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example.subscribe('combo', val => console.log('saved combo subscription state:',val))
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combo.subscribe(val => console.log('extened combo subscription state:',val))
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}
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}
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console.log('all current combinations',example.combinations)
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console.log('------------------starting to emit values--------------------------')
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// emitter.emit('ec',{ready:true})
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emitter.emit('ec',true)
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emitter.emit('pe','yup')
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emitter.emit('e')
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console.log('===============done initial emitting, pe,e,ec/ce=================')
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setTimeout(async () => {
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console.log('============emitting e, pe false===================')
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example.setObserverDetails('e',{moreinfo:'an additional property of details added later'})
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emitter.emit('e',false)
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emitter.emit('pe',false)
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}
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,2000)
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setTimeout(async () => {
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console.log('=================emitting e true, removing pe which is false ================')
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emitter.emit('e',true)
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example.removeObserver('pe')
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example.subscribe(ready=>console.log('a second all subscriber', ready),{add:true})
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}
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,4000)
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setTimeout(async () => {console.log('timeout done');process.exit()},10000)
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@ -1,6 +1,6 @@
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{
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"name": "@uci-utils/ready",
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"version": "0.1.6",
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"version": "0.1.7",
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"description": "A Class to Observe the reduced to boolean combined state of a map of observables",
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"main": "src/ready.js",
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"scripts": {
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142
src/ready.js
142
src/ready.js
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@ -11,21 +11,27 @@ class Ready extends Map {
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constructor(opts) {
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super(opts.observables)
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this.emitter = isEmitter(opts.emitter) ? opts.emitter : null
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const toBool = createBoolean(opts.boolean) // e.g. {undefined:true}
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this.condition = opts.condition || ( (ev) => toBool(ev) )
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this.subscriptions = new Map()
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this.combinations = new Map()
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this.details = new Map()
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this.combineObservers('__all__') // initialize all combination
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const toBool = createBoolean(opts.boolean)
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this.toBoolean = (value) => {
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if (isPlainObject(value)) value = (value.ready || value.online || value.active || false)
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return toBool(value)
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}
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this.condition = opts.condition || ( (ev) => this.toBoolean(ev) )
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this._subscriptions = new Map()
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this._combinations = new Map()
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this._all = {} // where all observer is kept
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this._combineAll()
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this.logger = new BehaviorSubject()
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this.state = [] // holds last state of all observers
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this.state = [] // holds last emitted state of all combination
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this.log = this.logger.next.bind(this.logger)
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if (opts.verbose||process.env.UCI_READY_VERBOSE==='true') this.logger.subscribe(console.log)
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this.handler = opts.handler || ((ready) => {console.log('default handler', ready)})
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this._first = true // tracks first emission
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}
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get observerNames(){return Array.from(this.keys())}
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get observers(){return Array.from(this.keys())}
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get combinations(){return Array.from(this._combinations.keys())}
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get all() { return this._all}
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get failure () {
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let ret = null
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@ -50,11 +56,12 @@ class Ready extends Map {
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}
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getObserver(name) {
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return ((this.get(name) || {}).obs || this.combinations.get(name||'__all__'))
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return (this.get(name) || {}).obs
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// return (name==null ||'__all__') ? this._all : ( (this.get(name) || {}).obs || this._combinations.get(name) || false )
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}
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getCombination(name) {
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this.combinations.get(name||'__all__')
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return this._combinations.get(name)
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}
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getValue(name) { // NOT recommended. if there is any issue will return false
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@ -71,7 +78,6 @@ class Ready extends Map {
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}
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makeObserver(obs, opts={}) {
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// validation and defaults, obs can be emitter, osbserver, or promise
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if (isPlainObject(obs)) { opts = obs; obs=null }
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if (!(obs || this.emitter)) return false // some observable requried
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@ -79,14 +85,15 @@ class Ready extends Map {
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condition = condition || this.condition
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if (isEmitter(obs) && (event || name)) obs = fromEvent(obs, event || name ) // it's an emitter
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if (isPromise(obs)) obs = from(obs) // it's a promise
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if (obs && !isObservable(obs) && typeof obs==='function' && arguments.length===2) condition = obs
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if (!obs && this.emitter && (event || name)) obs = fromEvent(this.emitter,event || name)
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if (!obs && this.emitter && (event || name)) obs = fromEvent(this.emitter,(event || name))
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if (!obs || !isObservable(obs)) return false
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let xobs = obs.pipe(
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tap(val => this.log(`${name} emitted/resolved the value =>${JSON.stringify(val)}`)),
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// TODO retain plain object if it has a ready property
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map(condition),
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tap(val => this.log(`boolean: ${val}`)),
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startWith(false),
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// shareReplay({refCount:true, bufferSize:1}),
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shareReplay(1),
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)
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xobs._readyType = true
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@ -96,86 +103,111 @@ class Ready extends Map {
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addObserver(name, obs, opts={} ) {
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// validation and defaults, obs can be emitter, osbserver, or promise
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if (!name || typeof(name)!=='string') return false // name required
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if (isPlainObject(obs)) { opts = obs; obs=null }
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if (this.has(name) && !opts.overwrite) return false // don't over write exiting observer
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else this.removeObserver(name)
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opts.name = name
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if (!(obs || {})._readyType) obs = this.makeObserver(obs, opts)
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if (!isObservable(obs)) return false
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let { details } = opts
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let sub = obs.subscribe()
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let sub = obs.subscribe() // internal subscriber
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// let sub = null
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this.set(name, {obs:obs, sub:sub})
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this.setObserverDetails(name,details)
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this.combineObservers('__all__',opts) // update total combo
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if (this.subscriptions.has('__all__')) this.subscribe() // will resubscribe
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this.setObserverDetails(name,opts.details)
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this._combineAll()
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return obs
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}
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// TODO add option for whether changed is enabled (default) or not and store with combo for remake
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combineObservers(name,list,opts={}) {
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if (Array.isArray(name)) {list = name; name = null}
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name = name || '__all__'
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if (name==='__all__') list = Array.from(this.keys()) // get list of all observers
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if (!Array.isArray(list)) return false // can't make a combo without a list
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if (this.has(name)) return false // can't save a combo with same name as any single oberver
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let observers = list.map(name=>this.getObserver(name)) // will get combo if exists
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if (observers.filter(obs=>!isObservable(obs)).length) return false
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let combination = combineLatest(observers).pipe(
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tap(states => { if (name==='__all__') this.state = list.map((name,index) => [name,states[index]])}),
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tap(states => { this.log(list.map((name,index) => [name,states[index]]))}),
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map(states => states.reduce((res,state) => {return res && state},true)),
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changed(), //filters out emission if it is unchanged from last
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startWith(false),
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shareReplay(1)
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)
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this.combinations.set(name, combination) // if name passed then save combo in Map
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return combination
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}
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// will remove combination as well
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removeObserver(names) {
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if (!names) names = this.observerNames
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else {
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if (!names) names = this.observers // remove all
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if (!Array.isArray(names)) names = [names]
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console.log('names to remove', names)
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names.forEach(name => {
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const sub = (this.get(name)||{}).sub
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if (sub) sub.unsubscribe() // remove attached subscription
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this.unsubscribe(name) // remove any manual subscription
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this.delete(name) || this.combinations.delete(name)
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this.delete(name)
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})
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}
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console.log(this.observerNames)
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this.combineObservers('__all__') // update total combo
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this.subscribe() // resubscribe to changed combo
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// update total combo
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this._combineAll()
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// TODO update affected combinations
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}
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subscribe(name, handler, save) {
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// TODO add option for whether changed is enabled (default) or not and store with combo for remake
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combineObservers(name,list,opts={}) {
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if (!name || typeof(name)!=='string') return false // name required
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if (this.has(name)) return false // can't save a combo with same name as any single oberver
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if (!Array.isArray(list)) return false // need a list of observers
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if (this._combinations.has(name)) {
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if (opts.overwrite) this.removeCombination(name)
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else return false
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}
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let observers = list.map(name=>{return name._readyType ? name : this.getObserver(name)})
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observers = observers.filter(obs=>obs._readyType)
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if (!observers.length) return false
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let combination = combineLatest(observers).pipe(
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tap(states => { this.log(list.map((name,index) => [name,states[index]]))}),
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map(states => states.reduce((res,state) => {return res && state},true)),
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changed(), //filters out emission if it is unchanged from last
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shareReplay(1)
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)
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this._combinations.set(name, combination) // if name passed then save combo in Map
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return combination
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}
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removeCombination(names){
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if (!names) names = this.combinations // remove all
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if (!Array.isArray(names)) names = [names]
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names.forEach(name => {
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// const sub = (this._combinations.get(name)||{}).sub
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// if (sub) sub.unsubscribe() // remove attached subscription
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this.unsubscribe(name) // remove any resigtered subscription
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this._combinations.delete(name)
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})
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}
|
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|
||||
subscribe(name, handler, opts={}) {
|
||||
// only one subscription at a time per observer or combination from this method
|
||||
if (typeof name ==='function') {
|
||||
opts=handler||{}
|
||||
handler=name
|
||||
name = null
|
||||
}
|
||||
name = name ||'__all__'
|
||||
handler = handler || (this.subscriptions.get(name)||{}).handler || this.handler
|
||||
let obs = this.getObserver(name) // will attempt to get combo if no simple observer, all if name is null
|
||||
handler = handler || (this._subscriptions.get(name)||{}).handler || this.handler // will resubscribe exisiting handler
|
||||
let obs = name==='__all__' ? this._all : (this.getObserver(name)||this.getCombination(name))
|
||||
if (!obs) return false
|
||||
if (this.subscriptions.has(name)) this.subscriptions.get(name).subs.unsubscribe()
|
||||
if (this._subscriptions.has(name)) this._subscriptions.get(name).subs.unsubscribe()
|
||||
let subs = obs.subscribe(handler)
|
||||
if (save) this.subscriptions.set(name,{subs:subs,handler:handler})
|
||||
// TODO allow reseting additional subscription on add/remove
|
||||
if (!opts.add) this._subscriptions.set(name, {subs:subs,handler:handler})
|
||||
return subs
|
||||
}
|
||||
|
||||
unsubscribe(name) {
|
||||
name = name ||'__all__'
|
||||
if (!this.subscriptions.has(name)) return false
|
||||
this.subscriptions.get(name).subs.unsubscribe()
|
||||
this.subscriptions.delete(name)
|
||||
if (!this._subscriptions.has(name)) return false
|
||||
this._subscriptions.get(name).subs.unsubscribe()
|
||||
this._subscriptions.delete(name)
|
||||
return true
|
||||
}
|
||||
|
||||
_combineAll() {
|
||||
let observers = this.observers.map(name=>this.getObserver(name))
|
||||
this._all = combineLatest(observers).pipe(
|
||||
tap(states => { this.state = this.observers.map((name,index) => [name,states[index]]) }),
|
||||
tap(states => { this.log(this.observers.map((name,index) => [name,states[index]])) }),
|
||||
map(states => states.reduce((res,state) => {return res && state},true)),
|
||||
changed(), //filters out emission if it is unchanged from last
|
||||
)
|
||||
if (this._subscriptions.has('__all__')) this.subscribe() // will resubscribe with same handler
|
||||
}
|
||||
|
||||
} // end class
|
||||
|
||||
|
||||
function changed(toBoolean) {
|
||||
toBoolean = toBoolean || (val => !!val)
|
||||
return obs$ => obs$.pipe(
|
||||
startWith(false),
|
||||
pairwise(),
|
||||
filter( ([p,c]) => {
|
||||
const chng = !obs$.__not_first__ || !!(toBoolean(p) ^ toBoolean(c))
|
||||
|
|
|
|||
Loading…
Reference in New Issue