src/charging-station/AutomaticTransactionGenerator.ts

   1 // Partial Copyright Jerome Benoit. 2021-2024. All Rights Reserved.
   2
   3 import { hoursToMilliseconds, secondsToMilliseconds } from 'date-fns'
   4
   5 import type { ChargingStation } from './ChargingStation.js'
   6 import { checkChargingStation } from './Helpers.js'
   7 import { IdTagsCache } from './IdTagsCache.js'
   8 import { isIdTagAuthorized } from './ocpp/index.js'
   9 import { BaseError } from '../exception/index.js'
  10 import { PerformanceStatistics } from '../performance/index.js'
  11 import {
  12   AuthorizationStatus,
  13   RequestCommand,
  14   type StartTransactionRequest,
  15   type StartTransactionResponse,
  16   type Status,
  17   StopTransactionReason,
  18   type StopTransactionResponse
  19 } from '../types/index.js'
  20 import {
  21   Constants,
  22   clone,
  23   convertToDate,
  24   formatDurationMilliSeconds,
  25   getRandomInteger,
  26   isValidDate,
  27   logPrefix,
  28   logger,
  29   secureRandom,
  30   sleep
  31 } from '../utils/index.js'
  32
  33 export class AutomaticTransactionGenerator {
  34   private static readonly instances: Map<string, AutomaticTransactionGenerator> = new Map<
  35   string,
  36   AutomaticTransactionGenerator
  37   >()
  38
  39   public readonly connectorsStatus: Map<number, Status>
  40   public started: boolean
  41   private starting: boolean
  42   private stopping: boolean
  43   private readonly chargingStation: ChargingStation
  44
  45   private constructor (chargingStation: ChargingStation) {
  46     this.started = false
  47     this.starting = false
  48     this.stopping = false
  49     this.chargingStation = chargingStation
  50     this.connectorsStatus = new Map<number, Status>()
  51     this.initializeConnectorsStatus()
  52   }
  53
  54   public static getInstance (
  55     chargingStation: ChargingStation
  56   ): AutomaticTransactionGenerator | undefined {
  57     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  58     if (!AutomaticTransactionGenerator.instances.has(chargingStation.stationInfo!.hashId)) {
  59       AutomaticTransactionGenerator.instances.set(
  60         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  61         chargingStation.stationInfo!.hashId,
  62         new AutomaticTransactionGenerator(chargingStation)
  63       )
  64     }
  65     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  66     return AutomaticTransactionGenerator.instances.get(chargingStation.stationInfo!.hashId)
  67   }
  68
  69   public start (): void {
  70     if (!checkChargingStation(this.chargingStation, this.logPrefix())) {
  71       return
  72     }
  73     if (this.started) {
  74       logger.warn(`${this.logPrefix()} is already started`)
  75       return
  76     }
  77     if (this.starting) {
  78       logger.warn(`${this.logPrefix()} is already starting`)
  79       return
  80     }
  81     this.starting = true
  82     this.startConnectors()
  83     this.started = true
  84     this.starting = false
  85   }
  86
  87   public stop (): void {
  88     if (!this.started) {
  89       logger.warn(`${this.logPrefix()} is already stopped`)
  90       return
  91     }
  92     if (this.stopping) {
  93       logger.warn(`${this.logPrefix()} is already stopping`)
  94       return
  95     }
  96     this.stopping = true
  97     this.stopConnectors()
  98     this.started = false
  99     this.stopping = false
 100   }
 101
 102   public startConnector (connectorId: number): void {
 103     if (!checkChargingStation(this.chargingStation, this.logPrefix(connectorId))) {
 104       return
 105     }
 106     if (!this.connectorsStatus.has(connectorId)) {
 107       logger.error(`${this.logPrefix(connectorId)} starting on non existing connector`)
 108       throw new BaseError(`Connector ${connectorId} does not exist`)
 109     }
 110     if (this.connectorsStatus.get(connectorId)?.start === false) {
 111       this.internalStartConnector(connectorId).catch(Constants.EMPTY_FUNCTION)
 112     } else if (this.connectorsStatus.get(connectorId)?.start === true) {
 113       logger.warn(`${this.logPrefix(connectorId)} is already started on connector`)
 114     }
 115   }
 116
 117   public stopConnector (connectorId: number): void {
 118     if (!this.connectorsStatus.has(connectorId)) {
 119       logger.error(`${this.logPrefix(connectorId)} stopping on non existing connector`)
 120       throw new BaseError(`Connector ${connectorId} does not exist`)
 121     }
 122     if (this.connectorsStatus.get(connectorId)?.start === true) {
 123       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 124       this.connectorsStatus.get(connectorId)!.start = false
 125     } else if (this.connectorsStatus.get(connectorId)?.start === false) {
 126       logger.warn(`${this.logPrefix(connectorId)} is already stopped on connector`)
 127     }
 128   }
 129
 130   private startConnectors (): void {
 131     if (
 132       this.connectorsStatus.size > 0 &&
 133       this.connectorsStatus.size !== this.chargingStation.getNumberOfConnectors()
 134     ) {
 135       this.connectorsStatus.clear()
 136       this.initializeConnectorsStatus()
 137     }
 138     if (this.chargingStation.hasEvses) {
 139       for (const [evseId, evseStatus] of this.chargingStation.evses) {
 140         if (evseId > 0) {
 141           for (const connectorId of evseStatus.connectors.keys()) {
 142             this.startConnector(connectorId)
 143           }
 144         }
 145       }
 146     } else {
 147       for (const connectorId of this.chargingStation.connectors.keys()) {
 148         if (connectorId > 0) {
 149           this.startConnector(connectorId)
 150         }
 151       }
 152     }
 153   }
 154
 155   private stopConnectors (): void {
 156     if (this.chargingStation.hasEvses) {
 157       for (const [evseId, evseStatus] of this.chargingStation.evses) {
 158         if (evseId > 0) {
 159           for (const connectorId of evseStatus.connectors.keys()) {
 160             this.stopConnector(connectorId)
 161           }
 162         }
 163       }
 164     } else {
 165       for (const connectorId of this.chargingStation.connectors.keys()) {
 166         if (connectorId > 0) {
 167           this.stopConnector(connectorId)
 168         }
 169       }
 170     }
 171   }
 172
 173   private async internalStartConnector (connectorId: number): Promise<void> {
 174     this.setStartConnectorStatus(connectorId)
 175     logger.info(
 176       `${this.logPrefix(
 177         connectorId
 178       )} started on connector and will run for ${formatDurationMilliSeconds(
 179         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 180         this.connectorsStatus.get(connectorId)!.stopDate!.getTime() -
 181           // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 182           this.connectorsStatus.get(connectorId)!.startDate!.getTime()
 183       )}`
 184     )
 185     while (this.connectorsStatus.get(connectorId)?.start === true) {
 186       await this.waitChargingStationAvailable(connectorId)
 187       await this.waitConnectorAvailable(connectorId)
 188       if (!this.canStartConnector(connectorId)) {
 189         this.stopConnector(connectorId)
 190         break
 191       }
 192       const wait = secondsToMilliseconds(
 193         getRandomInteger(
 194           this.chargingStation.getAutomaticTransactionGeneratorConfiguration()
 195             ?.maxDelayBetweenTwoTransactions,
 196           this.chargingStation.getAutomaticTransactionGeneratorConfiguration()
 197             ?.minDelayBetweenTwoTransactions
 198         )
 199       )
 200       logger.info(`${this.logPrefix(connectorId)} waiting for ${formatDurationMilliSeconds(wait)}`)
 201       await sleep(wait)
 202       const start = secureRandom()
 203       if (
 204         start <
 205         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 206         this.chargingStation.getAutomaticTransactionGeneratorConfiguration()!.probabilityOfStart
 207       ) {
 208         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 209         this.connectorsStatus.get(connectorId)!.skippedConsecutiveTransactions = 0
 210         // Start transaction
 211         const startResponse = await this.startTransaction(connectorId)
 212         if (startResponse?.idTagInfo.status === AuthorizationStatus.ACCEPTED) {
 213           // Wait until end of transaction
 214           const waitTrxEnd = secondsToMilliseconds(
 215             getRandomInteger(
 216               this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.maxDuration,
 217               this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.minDuration
 218             )
 219           )
 220           logger.info(
 221             `${this.logPrefix(connectorId)} transaction started with id ${
 222               this.chargingStation.getConnectorStatus(connectorId)?.transactionId
 223             } and will stop in ${formatDurationMilliSeconds(waitTrxEnd)}`
 224           )
 225           await sleep(waitTrxEnd)
 226           await this.stopTransaction(connectorId)
 227         }
 228       } else {
 229         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 230         ++this.connectorsStatus.get(connectorId)!.skippedConsecutiveTransactions
 231         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 232         ++this.connectorsStatus.get(connectorId)!.skippedTransactions
 233         logger.info(
 234           `${this.logPrefix(connectorId)} skipped consecutively ${
 235             this.connectorsStatus.get(connectorId)?.skippedConsecutiveTransactions
 236           }/${this.connectorsStatus.get(connectorId)?.skippedTransactions} transaction(s)`
 237         )
 238       }
 239       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 240       this.connectorsStatus.get(connectorId)!.lastRunDate = new Date()
 241     }
 242     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 243     this.connectorsStatus.get(connectorId)!.stoppedDate = new Date()
 244     logger.info(
 245       `${this.logPrefix(
 246         connectorId
 247       )} stopped on connector and lasted for ${formatDurationMilliSeconds(
 248         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 249         this.connectorsStatus.get(connectorId)!.stoppedDate!.getTime() -
 250           // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 251           this.connectorsStatus.get(connectorId)!.startDate!.getTime()
 252       )}`
 253     )
 254     logger.debug(
 255       `${this.logPrefix(connectorId)} connector status: %j`,
 256       this.connectorsStatus.get(connectorId)
 257     )
 258   }
 259
 260   private setStartConnectorStatus (connectorId: number): void {
 261     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 262     this.connectorsStatus.get(connectorId)!.startDate = new Date()
 263     if (
 264       this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.stopAbsoluteDuration ===
 265         false ||
 266       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 267       !isValidDate(this.connectorsStatus.get(connectorId)!.stopDate)
 268     ) {
 269       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 270       this.connectorsStatus.get(connectorId)!.stopDate = new Date(
 271         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 272         this.connectorsStatus.get(connectorId)!.startDate!.getTime() +
 273           hoursToMilliseconds(
 274             // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 275             this.chargingStation.getAutomaticTransactionGeneratorConfiguration()!.stopAfterHours
 276           )
 277       )
 278     }
 279     delete this.connectorsStatus.get(connectorId)?.stoppedDate
 280     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 281     this.connectorsStatus.get(connectorId)!.skippedConsecutiveTransactions = 0
 282     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 283     this.connectorsStatus.get(connectorId)!.start = true
 284   }
 285
 286   private canStartConnector (connectorId: number): boolean {
 287     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 288     if (new Date() > this.connectorsStatus.get(connectorId)!.stopDate!) {
 289       logger.info(
 290         `${this.logPrefix(
 291           connectorId
 292         )} entered in transaction loop while the ATG stop date has been reached`
 293       )
 294       return false
 295     }
 296     if (!this.chargingStation.inAcceptedState()) {
 297       logger.error(
 298         `${this.logPrefix(
 299           connectorId
 300         )} entered in transaction loop while the charging station is not in accepted state`
 301       )
 302       return false
 303     }
 304     if (!this.chargingStation.isChargingStationAvailable()) {
 305       logger.info(
 306         `${this.logPrefix(
 307           connectorId
 308         )} entered in transaction loop while the charging station is unavailable`
 309       )
 310       return false
 311     }
 312     if (!this.chargingStation.isConnectorAvailable(connectorId)) {
 313       logger.info(
 314         `${this.logPrefix(
 315           connectorId
 316         )} entered in transaction loop while the connector ${connectorId} is unavailable`
 317       )
 318       return false
 319     }
 320     return true
 321   }
 322
 323   private async waitChargingStationAvailable (connectorId: number): Promise<void> {
 324     let logged = false
 325     while (!this.chargingStation.isChargingStationAvailable()) {
 326       if (!logged) {
 327         logger.info(
 328           `${this.logPrefix(
 329             connectorId
 330           )} transaction loop waiting for charging station to be available`
 331         )
 332         logged = true
 333       }
 334       await sleep(Constants.CHARGING_STATION_ATG_AVAILABILITY_TIME)
 335     }
 336   }
 337
 338   private async waitConnectorAvailable (connectorId: number): Promise<void> {
 339     let logged = false
 340     while (!this.chargingStation.isConnectorAvailable(connectorId)) {
 341       if (!logged) {
 342         logger.info(
 343           `${this.logPrefix(
 344             connectorId
 345           )} transaction loop waiting for connector ${connectorId} to be available`
 346         )
 347         logged = true
 348       }
 349       await sleep(Constants.CHARGING_STATION_ATG_AVAILABILITY_TIME)
 350     }
 351   }
 352
 353   private initializeConnectorsStatus (): void {
 354     if (this.chargingStation.hasEvses) {
 355       for (const [evseId, evseStatus] of this.chargingStation.evses) {
 356         if (evseId > 0) {
 357           for (const connectorId of evseStatus.connectors.keys()) {
 358             this.connectorsStatus.set(connectorId, this.getConnectorStatus(connectorId))
 359           }
 360         }
 361       }
 362     } else {
 363       for (const connectorId of this.chargingStation.connectors.keys()) {
 364         if (connectorId > 0) {
 365           this.connectorsStatus.set(connectorId, this.getConnectorStatus(connectorId))
 366         }
 367       }
 368     }
 369   }
 370
 371   private getConnectorStatus (connectorId: number): Status {
 372     const statusIndex = connectorId - 1
 373     let connectorStatus: Status | undefined
 374     if (this.chargingStation.getAutomaticTransactionGeneratorStatuses()?.[statusIndex] != null) {
 375       connectorStatus = clone<Status>(
 376         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 377         this.chargingStation.getAutomaticTransactionGeneratorStatuses()![statusIndex]
 378       )
 379     } else if (this.chargingStation.getAutomaticTransactionGeneratorStatuses() != null) {
 380       logger.error(`${this.logPrefix(connectorId)} no status found for connector #${connectorId}`)
 381     }
 382     if (connectorStatus != null) {
 383       connectorStatus.startDate = convertToDate(connectorStatus.startDate)
 384       connectorStatus.lastRunDate = convertToDate(connectorStatus.lastRunDate)
 385       connectorStatus.stopDate = convertToDate(connectorStatus.stopDate)
 386       connectorStatus.stoppedDate = convertToDate(connectorStatus.stoppedDate)
 387       if (
 388         !this.started &&
 389         (connectorStatus.start ||
 390           this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.enable !== true)
 391       ) {
 392         connectorStatus.start = false
 393       }
 394     }
 395     return (
 396       connectorStatus ?? {
 397         start: false,
 398         authorizeRequests: 0,
 399         acceptedAuthorizeRequests: 0,
 400         rejectedAuthorizeRequests: 0,
 401         startTransactionRequests: 0,
 402         acceptedStartTransactionRequests: 0,
 403         rejectedStartTransactionRequests: 0,
 404         stopTransactionRequests: 0,
 405         acceptedStopTransactionRequests: 0,
 406         rejectedStopTransactionRequests: 0,
 407         skippedConsecutiveTransactions: 0,
 408         skippedTransactions: 0
 409       }
 410     )
 411   }
 412
 413   private async startTransaction (
 414     connectorId: number
 415   ): Promise<StartTransactionResponse | undefined> {
 416     const measureId = 'StartTransaction with ATG'
 417     const beginId = PerformanceStatistics.beginMeasure(measureId)
 418     let startResponse: StartTransactionResponse | undefined
 419     if (this.chargingStation.hasIdTags()) {
 420       const idTag = IdTagsCache.getInstance().getIdTag(
 421         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 422         this.chargingStation.getAutomaticTransactionGeneratorConfiguration()!.idTagDistribution!,
 423         this.chargingStation,
 424         connectorId
 425       )
 426       const startTransactionLogMsg = `${this.logPrefix(
 427         connectorId
 428       )} start transaction with an idTag '${idTag}'`
 429       if (this.getRequireAuthorize()) {
 430         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 431         ++this.connectorsStatus.get(connectorId)!.authorizeRequests
 432         if (await isIdTagAuthorized(this.chargingStation, connectorId, idTag)) {
 433           // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 434           ++this.connectorsStatus.get(connectorId)!.acceptedAuthorizeRequests
 435           logger.info(startTransactionLogMsg)
 436           // Start transaction
 437           startResponse = await this.chargingStation.ocppRequestService.requestHandler<
 438           StartTransactionRequest,
 439           StartTransactionResponse
 440           >(this.chargingStation, RequestCommand.START_TRANSACTION, {
 441             connectorId,
 442             idTag
 443           })
 444           this.handleStartTransactionResponse(connectorId, startResponse)
 445           PerformanceStatistics.endMeasure(measureId, beginId)
 446           return startResponse
 447         }
 448         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 449         ++this.connectorsStatus.get(connectorId)!.rejectedAuthorizeRequests
 450         PerformanceStatistics.endMeasure(measureId, beginId)
 451         return startResponse
 452       }
 453       logger.info(startTransactionLogMsg)
 454       // Start transaction
 455       startResponse = await this.chargingStation.ocppRequestService.requestHandler<
 456       StartTransactionRequest,
 457       StartTransactionResponse
 458       >(this.chargingStation, RequestCommand.START_TRANSACTION, {
 459         connectorId,
 460         idTag
 461       })
 462       this.handleStartTransactionResponse(connectorId, startResponse)
 463       PerformanceStatistics.endMeasure(measureId, beginId)
 464       return startResponse
 465     }
 466     logger.info(`${this.logPrefix(connectorId)} start transaction without an idTag`)
 467     startResponse = await this.chargingStation.ocppRequestService.requestHandler<
 468     StartTransactionRequest,
 469     StartTransactionResponse
 470     >(this.chargingStation, RequestCommand.START_TRANSACTION, { connectorId })
 471     this.handleStartTransactionResponse(connectorId, startResponse)
 472     PerformanceStatistics.endMeasure(measureId, beginId)
 473     return startResponse
 474   }
 475
 476   private async stopTransaction (
 477     connectorId: number,
 478     reason = StopTransactionReason.LOCAL
 479   ): Promise<StopTransactionResponse | undefined> {
 480     const measureId = 'StopTransaction with ATG'
 481     const beginId = PerformanceStatistics.beginMeasure(measureId)
 482     let stopResponse: StopTransactionResponse | undefined
 483     if (this.chargingStation.getConnectorStatus(connectorId)?.transactionStarted === true) {
 484       logger.info(
 485         `${this.logPrefix(connectorId)} stop transaction with id ${
 486           this.chargingStation.getConnectorStatus(connectorId)?.transactionId
 487         }`
 488       )
 489       stopResponse = await this.chargingStation.stopTransactionOnConnector(connectorId, reason)
 490       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 491       ++this.connectorsStatus.get(connectorId)!.stopTransactionRequests
 492       if (stopResponse.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
 493         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 494         ++this.connectorsStatus.get(connectorId)!.acceptedStopTransactionRequests
 495       } else {
 496         // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 497         ++this.connectorsStatus.get(connectorId)!.rejectedStopTransactionRequests
 498       }
 499     } else {
 500       const transactionId = this.chargingStation.getConnectorStatus(connectorId)?.transactionId
 501       logger.debug(
 502         `${this.logPrefix(connectorId)} stopping a not started transaction${
 503           transactionId != null ? ` with id ${transactionId}` : ''
 504         }`
 505       )
 506     }
 507     PerformanceStatistics.endMeasure(measureId, beginId)
 508     return stopResponse
 509   }
 510
 511   private getRequireAuthorize (): boolean {
 512     return (
 513       this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.requireAuthorize ?? true
 514     )
 515   }
 516
 517   private readonly logPrefix = (connectorId?: number): string => {
 518     return logPrefix(
 519       ` ${this.chargingStation.stationInfo?.chargingStationId} | ATG${
 520         connectorId != null ? ` on connector #${connectorId}` : ''
 521       }:`
 522     )
 523   }
 524
 525   private handleStartTransactionResponse (
 526     connectorId: number,
 527     startResponse: StartTransactionResponse
 528   ): void {
 529     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 530     ++this.connectorsStatus.get(connectorId)!.startTransactionRequests
 531     if (startResponse.idTagInfo.status === AuthorizationStatus.ACCEPTED) {
 532       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 533       ++this.connectorsStatus.get(connectorId)!.acceptedStartTransactionRequests
 534     } else {
 535       logger.warn(`${this.logPrefix(connectorId)} start transaction rejected`)
 536       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 537       ++this.connectorsStatus.get(connectorId)!.rejectedStartTransactionRequests
 538     }
 539   }
 540 }