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bufferTime, concatMap, filter, map, takeUntil
} from 'rxjs/operators';
import {
BehaviorSubject, interval, Observable, Subject, Subscription, timer
} from 'rxjs';
import { Injectable } from '@angular/core';
import { Router } from '@angular/router';
import { MaxTimerData, Testlet, UnitWithContext } from '../classes/test-controller.classes';
import {
KeyValuePairNumber,
KeyValuePairString,
LoadingProgress,
MaxTimerDataType,
StateReportEntry,
TestControllerState,
TestStateKey,
UnitDataParts,
UnitNavigationTarget,
UnitStateUpdate,
WindowFocusState
} from '../interfaces/test-controller.interfaces';
import { BackendService } from './backend.service';
import { BookletConfig, TestMode } from '../../shared/shared.module';
import { VeronaNavigationDeniedReason } from '../interfaces/verona.interfaces';
import { MissingBookletError } from '../classes/missing-booklet-error.class';
import { MessageService } from '../../shared/services/message.service';
import { AppError } from '../../app.interfaces';
@Injectable({
providedIn: 'root'
})
export class TestControllerService {
static readonly unitDataBufferMs = 1000;
static readonly unitStateBufferMs = 2500;
testId = '';
testStatus$ = new BehaviorSubject<TestControllerState>(TestControllerState.INIT);
testStatusEnum = TestControllerState;
workspaceId = 0;
testStructureChanges$ = new BehaviorSubject<void>(undefined);
totalLoadingProgress = 0;
clearCodeTestlets: string[] = [];
testMode = new TestMode();
bookletConfig = new BookletConfig();
rootTestlet: Testlet | null = null;
maxTimeTimer$ = new Subject<MaxTimerData>();
currentMaxTimerTestletId = '';
private maxTimeIntervalSubscription: Subscription | null = null;
maxTimeTimers: KeyValuePairNumber = {};
timerWarningPoints: number[] = [];
currentUnitDbKey = '';
currentUnitTitle = '';
currentPageIndex: number = -1;
currentPageLabel: string = '';
allUnitIds: string[] = [];
windowFocusState$ = new Subject<WindowFocusState>();
resumeTargetUnitSequenceId = 0;
originalUnitId = this.rootTestlet?.getUnitAt(this.currentUnitSequenceId)?.unitDef.id ?? '';
private _navigationDenial = new Subject<{ sourceUnitSequenceId: number, reason: VeronaNavigationDeniedReason[] }>();
get navigationDenial(): Observable<{ sourceUnitSequenceId: number, reason: VeronaNavigationDeniedReason[] }> {
return this._navigationDenial;
}
private _currentUnitSequenceId$: BehaviorSubject<number> = new BehaviorSubject<number>(-Infinity);
get currentUnitSequenceId(): number {
return this._currentUnitSequenceId$.getValue();
}
set currentUnitSequenceId(v: number) {
this._currentUnitSequenceId$.next(v);
}
get currentUnitSequenceId$(): Observable<number> {
return this._currentUnitSequenceId$.asObservable();
}
/**
* the structure of this service is weird: instead of distributing the UnitDefs into the several arrays
* below we could store a single array with UnitDefs (wich would be a flattened version of the root testlet). Thus
* we would could get rid of all those arrays, get-, set- and has- functions. I leave this out for the next
* refactoring. Also those data-stores are only used to transfer restored data from loading process to the moment of
* sending vopStartCommand. They are almost never updated.
* TODO simplify data structure
*/
private players: { [filename: string]: string } = {};
private unitDefinitions: { [sequenceId: number]: string } = {};
private unitStateDataParts: { [sequenceId: number]: KeyValuePairString } = {};
private unitPresentationProgressStates: { [sequenceId: number]: string | undefined } = {};
private unitResponseProgressStates: { [sequenceId: number]: string | undefined } = {};
private unitStateCurrentPages: { [sequenceId: number]: string | undefined } = {};
private unitContentLoadProgress$: { [sequenceId: number]: Observable<LoadingProgress> } = {};
private unitDefinitionTypes: { [sequenceId: number]: string } = {};
private unitResponseTypes: { [sequenceId: number]: string } = {};
private unitDataPartsToSave$ = new Subject<UnitDataParts>();
private unitDataPartsToSaveSubscription: Subscription | null = null;
private unitStateToSave$ = new Subject<UnitStateUpdate>();
private unitStateToSaveSubscription: Subscription | null = null;
constructor(
private router: Router,
private bs: BackendService,
private messageService: MessageService
) {
this.setupUnitDataPartsBuffer();
this.setupUnitStateBuffer();
}
setupUnitDataPartsBuffer(): void {
this.destroyUnitDataPartsBuffer(); // important when called from unit-test with fakeAsync
this.destroyUnitStateBuffer();
// the last buffer when test gets terminated is lost. Seems not to be important, but noteworthy
this.unitDataPartsToSaveSubscription = this.unitDataPartsToSave$
.pipe(
bufferTime(TestControllerService.unitDataBufferMs),
filter(dataPartsBuffer => !!dataPartsBuffer.length),
concatMap(dataPartsBuffer => {
const sortedByUnit = dataPartsBuffer
.reduce(
(agg, dataParts) => {
if (!agg[dataParts.unitDbKey]) agg[dataParts.unitDbKey] = [];
agg[dataParts.unitDbKey].push(dataParts);
return agg;
},
<{ [unitId: string]: UnitDataParts[] }>{}
);
return Object.keys(sortedByUnit)
.map(unitId => ({
unitDbKey: unitId,
dataParts: Object.assign({}, ...sortedByUnit[unitId].map(entry => entry.dataParts)),
// verona4 does not support different dataTypes for different Chunks
unitStateDataType: sortedByUnit[unitId][0].unitStateDataType
}));
})
)
.subscribe(changedDataParts => {
this.bs.updateDataParts(
this.testId,
changedDataParts.unitDbKey,
this.originalUnitId,
changedDataParts.dataParts,
changedDataParts.unitStateDataType
);
});
}
setupUnitStateBuffer(): void {
this.unitStateToSaveSubscription = this.unitStateToSave$
.pipe(
bufferTime(TestControllerService.unitStateBufferMs),
filter(stateBuffer => !!stateBuffer.length),
concatMap(stateBuffer => Object.values(
stateBuffer
.reduce(
(agg, stateUpdate) => {
if (!agg[stateUpdate.unitDbKey]) {
agg[stateUpdate.unitDbKey] = <UnitStateUpdate>{ unitDbKey: stateUpdate.unitDbKey, state: [] };
}
agg[stateUpdate.unitDbKey].state.push(...stateUpdate.state);
return agg;
},
<{ [unitId: string]: UnitStateUpdate }>{}
)
))
)
.subscribe(aggregatedStateUpdate => {
this.bs.updateUnitState(
this.testId,
aggregatedStateUpdate.unitDbKey,
this.originalUnitId,
aggregatedStateUpdate.state
);
});
}
destroyUnitDataPartsBuffer(): void {
if (this.unitDataPartsToSaveSubscription) this.unitDataPartsToSaveSubscription.unsubscribe();
}
destroyUnitStateBuffer(): void {
if (this.unitStateToSaveSubscription) this.unitStateToSaveSubscription.unsubscribe();
}
resetDataStore(): void {
this.players = {};
this.unitDefinitions = {};
this.unitStateDataParts = {};
this.rootTestlet = null;
this.clearCodeTestlets = [];
this.currentUnitSequenceId = 0;
this.currentUnitDbKey = '';
this.currentUnitTitle = '';
Iif (this.maxTimeIntervalSubscription !== null) {
this.maxTimeIntervalSubscription.unsubscribe();
this.maxTimeIntervalSubscription = null;
}
this.currentMaxTimerTestletId = '';
this.maxTimeTimers = {};
this.unitPresentationProgressStates = {};
this.unitResponseProgressStates = {};
this.unitStateCurrentPages = {};
this.unitDefinitionTypes = {};
this.unitResponseTypes = {};
this.timerWarningPoints = [];
this.workspaceId = 0;
}
// uppercase and add extension if not part
static normaliseId(id: string, expectedExtension = ''): string {
let normalisedId = id.trim().toUpperCase();
const normalisedExtension = expectedExtension.toUpperCase();
if (normalisedExtension && (normalisedId.split('.').pop() !== normalisedExtension)) {
normalisedId += `.${normalisedExtension}`;
}
return normalisedId;
}
updateUnitStateDataParts(
unitDbKey: string,
sequenceId: number,
dataParts: KeyValuePairString,
unitStateDataType: string
): void {
const changedParts: KeyValuePairString = {};
Object.keys(dataParts)
.forEach(dataPartId => {
if (!this.unitStateDataParts[sequenceId]) {
this.unitStateDataParts[sequenceId] = {};
}
if (
!this.unitStateDataParts[sequenceId][dataPartId] ||
(this.unitStateDataParts[sequenceId][dataPartId] !== dataParts[dataPartId])
) {
this.unitStateDataParts[sequenceId][dataPartId] = dataParts[dataPartId];
changedParts[dataPartId] = dataParts[dataPartId];
}
});
if (Object.keys(changedParts).length && this.testMode.saveResponses) {
this.unitDataPartsToSave$.next({ unitDbKey, dataParts: changedParts, unitStateDataType });
}
}
// TODO remove parameter unitSequenceId. getUnitWithContext is kind of expensive, when this is fixed, we need only...
// ...unitSequenceId or unitStateUpdate.unitDbKey and can remove the other one
updateUnitState(unitSequenceId: number, unitStateUpdate: UnitStateUpdate): void {
unitStateUpdate.state = unitStateUpdate.state
.filter(state => !!state.content)
.filter(changedState => {
const oldState = this.getUnitState(unitSequenceId, changedState.key);
if (oldState) {
return oldState !== changedState.content;
}
return true;
});
unitStateUpdate.state
.forEach(changedState => this.setUnitState(unitSequenceId, changedState.key, changedState.content));
if (this.testMode.saveResponses && unitStateUpdate.state.length) {
this.unitStateToSave$.next(unitStateUpdate);
}
}
// TODO the following two functions are workarounds to the shitty structure of this service (see above)
private getUnitState(unitSequenceId: number, stateKey: string): string | undefined {
if (stateKey === 'RESPONSE_PROGRESS') {
return this.unitResponseProgressStates[unitSequenceId];
}
if (stateKey === 'PRESENTATION_PROGRESS') {
return this.unitPresentationProgressStates[unitSequenceId];
}
Iif (stateKey === 'CURRENT_PAGE_ID') {
return this.unitStateCurrentPages[unitSequenceId];
}
return undefined;
}
private setUnitState(unitSequenceId: number, stateKey: string, value: string): void {
if (stateKey === 'RESPONSE_PROGRESS') {
this.unitResponseProgressStates[unitSequenceId] = value;
}
if (stateKey === 'PRESENTATION_PROGRESS') {
this.unitPresentationProgressStates[unitSequenceId] = value;
}
Iif (stateKey === 'CURRENT_PAGE_ID') {
this.unitStateCurrentPages[unitSequenceId] = value;
}
}
addPlayer(fileName: string, player: string): void {
this.players[fileName] = player;
}
hasPlayer(fileName: string): boolean {
return fileName in this.players;
}
getPlayer(fileName: string): string {
return this.players[fileName];
}
setUnitDefinition(sequenceId: number, uDef: string): void {
this.unitDefinitions[sequenceId] = uDef;
}
getUnitDefinition(sequenceId: number): string {
return this.unitDefinitions[sequenceId];
}
setUnitStateDataParts(unitSequenceId: number, dataParts: KeyValuePairString): void {
this.unitStateDataParts[unitSequenceId] = dataParts;
}
getUnitStateDataParts(sequenceId: number): KeyValuePairString {
return this.unitStateDataParts[sequenceId];
}
setUnitPresentationProgress(sequenceId: number, state: string | undefined): void {
this.unitPresentationProgressStates[sequenceId] = state;
}
hasUnitPresentationProgress(sequenceId: number): boolean {
return sequenceId in this.unitPresentationProgressStates;
}
getUnitPresentationProgress(sequenceId: number): string | undefined {
return this.unitPresentationProgressStates[sequenceId];
}
hasUnitResponseProgress(sequenceId: number): boolean {
return sequenceId in this.unitResponseProgressStates;
}
setUnitResponseProgress(sequenceId: number, state: string | undefined): void {
this.unitResponseProgressStates[sequenceId] = state;
}
getUnitResponseProgress(sequenceId: number): string | undefined {
return this.unitResponseProgressStates[sequenceId];
}
getUnitStateCurrentPage(sequenceId: number): string | null {
return this.unitStateCurrentPages[sequenceId] ?? null;
}
setUnitStateCurrentPage(sequenceId: number, pageId: string | undefined): void {
this.unitStateCurrentPages[sequenceId] = pageId;
}
setUnitLoadProgress$(sequenceId: number, progress: Observable<LoadingProgress>): void {
this.unitContentLoadProgress$[sequenceId] = progress;
}
getUnitLoadProgress$(sequenceId: number): Observable<LoadingProgress> {
return this.unitContentLoadProgress$[sequenceId];
}
setUnitPlayerFilename(sequenceId: number, unitDefinitionType: string): void {
this.unitDefinitionTypes[sequenceId] = unitDefinitionType;
}
getUnitDefinitionType(sequenceId: number): string {
return this.unitDefinitionTypes[sequenceId];
}
setUnitResponseType(sequenceId: number, unitResponseType: string): void {
this.unitResponseTypes[sequenceId] = unitResponseType;
}
getUnitResponseType(sequenceId: number): string {
return this.unitResponseTypes[sequenceId];
}
addClearedCodeTestlet(testletId: string): void {
Iif (this.clearCodeTestlets.indexOf(testletId) < 0) {
this.clearCodeTestlets.push(testletId);
this.testStructureChanges$.next();
Iif (this.testMode.saveResponses) {
this.bs.updateTestState(
this.testId,
[<StateReportEntry>{
key: TestStateKey.TESTLETS_CLEARED_CODE,
timeStamp: Date.now(),
content: JSON.stringify(this.clearCodeTestlets)
}]
);
}
}
}
getUnclearedTestlets(unit: UnitWithContext): Testlet[] {
return unit.codeRequiringTestlets
.filter(testlet => !this.clearCodeTestlets.includes(testlet.id));
}
getUnitIsLockedByCode(unit: UnitWithContext): boolean {
return this.getFirstSequenceIdOfLockedBlock(unit) !== unit.unitDef.sequenceId;
}
getFirstSequenceIdOfLockedBlock(fromUnit: UnitWithContext): number {
const unclearedTestlets = this.getUnclearedTestlets(fromUnit);
Iif (!unclearedTestlets.length) {
return fromUnit.unitDef.sequenceId;
}
return unclearedTestlets
.reduce((acc, item) => (acc.sequenceId < item.sequenceId ? acc : item))
.children
.filter(child => !!child.sequenceId)[0].sequenceId;
}
getUnitIsLocked(unit: UnitWithContext): boolean {
return this.getUnitIsLockedByCode(unit) || unit.unitDef.lockedByTime;
}
getUnitWithContext(unitSequenceId: number): UnitWithContext {
Iif (!this.rootTestlet) { // when loading process was aborted
throw new MissingBookletError();
}
const unit = this.rootTestlet.getUnitAt(unitSequenceId);
Iif (!unit) {
throw new AppError({
label: `Unit not found:${unitSequenceId}`,
description: '',
type: 'script'
});
}
return unit;
}
// the duplication of getUnitWithContext is a temporary fix and is already solved better in testcenter 15.2
getUnitWithContextSilent(unitSequenceId: number): UnitWithContext | null {
Iif (!this.rootTestlet) { // when loading process was aborted
throw new MissingBookletError();
}
return this.rootTestlet.getUnitAt(unitSequenceId);
}
getNextUnlockedUnitSequenceId(currentUnitSequenceId: number, reverse: boolean = false): number | null {
const step = reverse ? -1 : 1;
let nextUnitSequenceId = currentUnitSequenceId + step;
let nextUnit: UnitWithContext | null = this.getUnitWithContextSilent(nextUnitSequenceId);
while (nextUnit !== null && this.getUnitIsLocked(nextUnit)) {
nextUnitSequenceId += step;
nextUnit = this.getUnitWithContextSilent(nextUnitSequenceId);
}
return nextUnit ? nextUnitSequenceId : null;
}
startMaxTimer(testlet: Testlet): void {
const timeLeftMinutes = (testlet.id in this.maxTimeTimers) ?
Math.min(this.maxTimeTimers[testlet.id], testlet.maxTimeLeft) :
testlet.maxTimeLeft;
Iif (this.maxTimeIntervalSubscription !== null) {
this.maxTimeIntervalSubscription.unsubscribe();
}
this.maxTimeTimer$.next(new MaxTimerData(timeLeftMinutes, testlet.id, MaxTimerDataType.STARTED));
this.currentMaxTimerTestletId = testlet.id;
this.maxTimeIntervalSubscription = interval(1000)
.pipe(
takeUntil(
timer(timeLeftMinutes * 60 * 1000)
),
map(val => (timeLeftMinutes * 60) - val - 1)
).subscribe({
next: val => {
this.maxTimeTimer$.next(new MaxTimerData(val / 60, testlet.id, MaxTimerDataType.STEP));
},
error: e => {
throw e;
},
complete: () => {
this.maxTimeTimer$.next(new MaxTimerData(0, testlet.id, MaxTimerDataType.ENDED));
this.currentMaxTimerTestletId = '';
}
});
}
cancelMaxTimer(): void {
Iif (this.maxTimeIntervalSubscription !== null) {
this.maxTimeIntervalSubscription.unsubscribe();
this.maxTimeIntervalSubscription = null;
this.maxTimeTimer$.next(new MaxTimerData(0, this.currentMaxTimerTestletId, MaxTimerDataType.CANCELLED));
}
this.currentMaxTimerTestletId = '';
}
interruptMaxTimer(): void {
Iif (this.maxTimeIntervalSubscription !== null) {
this.maxTimeIntervalSubscription.unsubscribe();
this.maxTimeIntervalSubscription = null;
this.maxTimeTimer$.next(new MaxTimerData(0, this.currentMaxTimerTestletId, MaxTimerDataType.INTERRUPTED));
}
this.currentMaxTimerTestletId = '';
}
notifyNavigationDenied(sourceUnitSequenceId: number, reason: VeronaNavigationDeniedReason[]): void {
this._navigationDenial.next({ sourceUnitSequenceId, reason });
}
terminateTest(logEntryKey: string, force: boolean, lockTest: boolean = false): void {
Iif (
(this.testStatus$.getValue() === TestControllerState.TERMINATED) ||
(this.testStatus$.getValue() === TestControllerState.FINISHED)
) {
// sometimes terminateTest get called two times from player
return;
}
const oldTestStatus = this.testStatus$.getValue();
this.testStatus$.next(
(oldTestStatus === TestControllerState.PAUSED) ?
TestControllerState.TERMINATED_PAUSED :
TestControllerState.TERMINATED
); // last state that will and can be logged
this.router.navigate(['/r/starter'], { state: { force } })
.then(navigationSuccessful => {
Iif (!(navigationSuccessful || force)) {
this.testStatus$.next(oldTestStatus); // navigation was denied, test continues
return;
}
this.finishTest(logEntryKey, lockTest);
});
}
private finishTest(logEntryKey: string, lockTest: boolean = false): void {
if (lockTest) {
this.bs.lockTest(this.testId, Date.now(), logEntryKey);
} else {
this.testStatus$.next(TestControllerState.FINISHED); // will not be logged, test is already locked maybe
}
}
setUnitNavigationRequest(navString: string, force = false): void {
const targetIsCurrent = this.currentUnitSequenceId.toString(10) === navString;
Iif (!this.rootTestlet) {
this.router.navigate([`/t/${this.testId}/status`], { skipLocationChange: true, state: { force } });
} else {
switch (navString) {
case UnitNavigationTarget.ERROR:
case UnitNavigationTarget.PAUSE:
this.router.navigate([`/t/${this.testId}/status`], { skipLocationChange: true, state: { force } });
break;
case UnitNavigationTarget.NEXT:
// eslint-disable-next-line no-case-declarations
const nextUnlockedUnitSequenceId =
this.getNextUnlockedUnitSequenceId(this.currentUnitSequenceId) ?? this.allUnitIds.length;
Iif (!nextUnlockedUnitSequenceId) break;
this.router.navigate([`/t/${this.testId}/u/${nextUnlockedUnitSequenceId}`], { state: { force } });
break;
case UnitNavigationTarget.PREVIOUS:
// eslint-disable-next-line no-case-declarations
const previousUnlockedUnitSequenceId =
this.getNextUnlockedUnitSequenceId(this.currentUnitSequenceId, true) ?? 1;
this.router.navigate([`/t/${this.testId}/u/${previousUnlockedUnitSequenceId}`], { state: { force } });
break;
case UnitNavigationTarget.FIRST:
this.router.navigate([`/t/${this.testId}/u/1`], { state: { force } });
break;
case UnitNavigationTarget.LAST:
this.router.navigate([`/t/${this.testId}/u/${this.allUnitIds.length}`], { state: { force } });
break;
case UnitNavigationTarget.END:
this.terminateTest(
force ? 'BOOKLETLOCKEDforced' : 'BOOKLETLOCKEDbyTESTEE',
force,
this.bookletConfig.lock_test_on_termination === 'ON'
);
break;
default:
// eslint-disable-next-line no-case-declarations
let navNr = parseInt(navString, 10);
navNr = (navNr <= 1) ? 1 : navNr;
navNr = (navNr > this.allUnitIds.length) ? this.allUnitIds.length : navNr;
this.router.navigate(
[`/t/${this.testId}/u/${navNr}`],
{
state: { force },
// eslint-disable-next-line no-bitwise
queryParams: targetIsCurrent ? { reload: Date.now() >> 11 } : {}
// unit shall be reloaded even if we are there already there
}
)
.then(navOk => {
Iif (!navOk && !targetIsCurrent) {
this.messageService.showError(`Navigation zu ${navString} nicht möglich!`);
}
});
break;
}
}
}
errorOut(): void {
this.totalLoadingProgress = 0;
this.testStatus$.next(TestControllerState.ERROR);
this.setUnitNavigationRequest(UnitNavigationTarget.ERROR);
}
pause(): void {
this.interruptMaxTimer();
this.testStatus$.next(TestControllerState.PAUSED);
this.setUnitNavigationRequest(UnitNavigationTarget.PAUSE, true);
}
isUnitContentLoaded(sequenceId: number): boolean {
return !!this.unitDefinitions[sequenceId];
}
}
|