STEINNI
83 lines
2.3 KiB
JavaScript
83 lines
2.3 KiB
JavaScript
import { positionAt } from '../GPS/actions/arena/worldline.js'
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export class GpsStorageReader {
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constructor(systemCnx, gpsStorage, debug = false) {
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this.cnx = systemCnx
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this.gpsStorage = gpsStorage
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this.debug = debug
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}
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agentHashKey(agentId) {
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return(this.gpsStorage.agentHashKey.replace(/\[UID\]/g, agentId))
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}
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#parseHashField(raw) {
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if(raw == null) return(null)
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if(typeof(raw) === 'object') return(raw)
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try { return(JSON.parse(raw)) }
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catch { return(null) }
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}
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#segmentToAgent(segment) {
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if(!segment?.id) return(null)
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if(!this.#isVector(segment.position) || !this.#isVector(segment.vector)) return(null)
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return({
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id: segment.id,
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position: { ...segment.position },
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vector: { ...segment.vector },
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since: segment.since ?? 0,
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generation: segment.generation ?? 0,
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})
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}
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#isVector(v) {
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return(
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v &&
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typeof(v) === 'object' &&
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typeof(v.x) === 'number' &&
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typeof(v.y) === 'number' &&
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typeof(v.z) === 'number'
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)
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}
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buildAgentSnapshot(agent, at) {
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return({
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id: agent.id,
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position: positionAt(agent, at),
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vector: { ...agent.vector },
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since: agent.since,
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generation: agent.generation ?? 0,
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t: at,
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})
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}
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async loadSegment(agentId) {
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const raw = await this.cnx.redisHget(this.agentHashKey(agentId), 'segment')
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return(this.#parseHashField(raw))
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}
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async listAgentIds() {
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return(await this.cnx.redisSmembers(this.gpsStorage.agentsIndexKey))
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}
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async loadAllAgents() {
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const ids = await this.listAgentIds()
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const agents = new Map()
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for(const id of ids) {
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const segment = await this.loadSegment(id)
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const agent = this.#segmentToAgent(segment)
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if(agent) agents.set(id, agent)
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}
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return(agents)
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}
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async getAgentPosition(agentId, at) {
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const segment = await this.loadSegment(agentId)
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const agent = this.#segmentToAgent(segment)
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if(!agent) return(null)
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return(this.buildAgentSnapshot(agent, at))
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}
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}
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