| 1 | import ChargingStationConfiguration from '../types/ChargingStationConfiguration'; |
| 2 | import ChargingStationTemplate from '../types/ChargingStationTemplate'; |
| 3 | import LRUCache from 'mnemonist/lru-map-with-delete'; |
| 4 | import Utils from '../utils/Utils'; |
| 5 | |
| 6 | enum CacheType { |
| 7 | CHARGING_STATION_TEMPLATE = 'chargingStationTemplate', |
| 8 | CHARGING_STATION_CONFIGURATION = 'chargingStationConfiguration', |
| 9 | } |
| 10 | |
| 11 | export class ChargingStationCache { |
| 12 | private static instance: ChargingStationCache | null = null; |
| 13 | private readonly lruCache: LRUCache<string, any>; |
| 14 | |
| 15 | private constructor() { |
| 16 | this.lruCache = new LRUCache<string, any>(1000); |
| 17 | } |
| 18 | |
| 19 | public static getInstance(): ChargingStationCache { |
| 20 | if (!ChargingStationCache.instance) { |
| 21 | ChargingStationCache.instance = new ChargingStationCache(); |
| 22 | } |
| 23 | return ChargingStationCache.instance; |
| 24 | } |
| 25 | |
| 26 | public hasChargingStationConfiguration(chargingStationConfigurationHash: string): boolean { |
| 27 | return this.has(CacheType.CHARGING_STATION_CONFIGURATION + chargingStationConfigurationHash); |
| 28 | } |
| 29 | |
| 30 | public setChargingStationConfiguration( |
| 31 | chargingStationConfiguration: ChargingStationConfiguration |
| 32 | ): void { |
| 33 | if (this.isChargingStationConfigurationCacheable(chargingStationConfiguration)) { |
| 34 | this.set( |
| 35 | CacheType.CHARGING_STATION_CONFIGURATION + chargingStationConfiguration.configurationHash, |
| 36 | chargingStationConfiguration |
| 37 | ); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | public getChargingStationConfiguration( |
| 42 | chargingStationConfigurationHash: string |
| 43 | ): ChargingStationConfiguration { |
| 44 | return this.get( |
| 45 | CacheType.CHARGING_STATION_CONFIGURATION + chargingStationConfigurationHash |
| 46 | ) as ChargingStationConfiguration; |
| 47 | } |
| 48 | |
| 49 | public deleteChargingStationConfiguration(chargingStationConfigurationHash: string): void { |
| 50 | this.delete(CacheType.CHARGING_STATION_CONFIGURATION + chargingStationConfigurationHash); |
| 51 | } |
| 52 | |
| 53 | public hasChargingStationTemplate(chargingStationTemplateHash: string): boolean { |
| 54 | return this.has(CacheType.CHARGING_STATION_TEMPLATE + chargingStationTemplateHash); |
| 55 | } |
| 56 | |
| 57 | public setChargingStationTemplate(chargingStationTemplate: ChargingStationTemplate): void { |
| 58 | this.set( |
| 59 | CacheType.CHARGING_STATION_TEMPLATE + chargingStationTemplate.templateHash, |
| 60 | chargingStationTemplate |
| 61 | ); |
| 62 | } |
| 63 | |
| 64 | public getChargingStationTemplate(chargingStationTemplateHash: string): ChargingStationTemplate { |
| 65 | return this.get( |
| 66 | CacheType.CHARGING_STATION_TEMPLATE + chargingStationTemplateHash |
| 67 | ) as ChargingStationTemplate; |
| 68 | } |
| 69 | |
| 70 | public deleteChargingStationTemplate(chargingStationTemplateHash: string): void { |
| 71 | this.delete(CacheType.CHARGING_STATION_TEMPLATE + chargingStationTemplateHash); |
| 72 | } |
| 73 | |
| 74 | public clear(): void { |
| 75 | this.lruCache.clear(); |
| 76 | } |
| 77 | |
| 78 | private has(key: string): boolean { |
| 79 | return this.lruCache.has(key); |
| 80 | } |
| 81 | |
| 82 | private get(key: string): any { |
| 83 | return this.lruCache.get(key); |
| 84 | } |
| 85 | |
| 86 | private set(key: string, value: any): void { |
| 87 | this.lruCache.set(key, value); |
| 88 | } |
| 89 | |
| 90 | private delete(key: string): void { |
| 91 | this.lruCache.delete(key); |
| 92 | } |
| 93 | |
| 94 | private isChargingStationConfigurationCacheable( |
| 95 | chargingStationConfiguration: ChargingStationConfiguration |
| 96 | ): boolean { |
| 97 | return ( |
| 98 | !Utils.isNullOrUndefined(chargingStationConfiguration?.configurationKey) && |
| 99 | !Utils.isNullOrUndefined(chargingStationConfiguration?.stationInfo) && |
| 100 | !Utils.isNullOrUndefined(chargingStationConfiguration?.configurationHash) && |
| 101 | !Utils.isEmptyArray(chargingStationConfiguration?.configurationKey) && |
| 102 | !Utils.isEmptyObject(chargingStationConfiguration?.stationInfo) && |
| 103 | !Utils.isEmptyString(chargingStationConfiguration?.configurationHash) |
| 104 | ); |
| 105 | } |
| 106 | } |