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store.ts
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store.ts
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import { getHistoryDates } from './datetime'
import type { Monitor } from '#src/types'
import { config } from '#src/config'
import { aMiB, memorySizeOf } from '#src/helpers/memory'
import getRemoteMonitors from '#src/helpers/monitors'
import { ensureWorkerEnv } from '#src/worker/_helpers'
export const WORKER_SUBREQUESTS_LIMIT = 50
export const DATA_KEY = 'data-v1'
export interface MonitorLastCheck {
/** Timestamp(ms) */
time?: number
operational: boolean
status: number
statusText: string
}
export interface DataV1LastCheck {
/** Timestamp(ms) */
time: number
location: string
/** Requests has been initiated, subrequest including required/check/notify request */
subrequests: {
total: number
/** Monitor notified subrequests has been initiated */
notified: number
/** Monitor required subrequests has been initiated */
required: number
}
/** Monitor check subrequests has been initiated, store with monitor id */
checks: {
ids: string[]
allOperational: boolean
}
}
export interface MonitorDailyChecksItem {
date: string
fails: number
/**
* Stats for operational monitor
*
* Key: location, No value if config.settings.collectResponseTimes=false
*/
stats: Record<string, {
count: number
totalMs: number
// totalMs / count
// avgMs: number
}>
}
export interface MonitorAllData {
checks: MonitorDailyChecksItem[]
firstCheck: string
lastCheck: MonitorLastCheck
}
export interface DataV1 {
/** Key: monitor id */
monitorHistoryData?: Record<string, MonitorAllData>
lastUpdate?: DataV1LastCheck
}
export async function upsertKvStore(value: DataV1 | null, allMonitors: Monitor[]) {
ensureWorkerEnv()
if (value === null) {
await KV_STORE.delete(DATA_KEY)
return
}
const cleanedValue = await cleanDataV1(value, allMonitors)
await KV_STORE.put(DATA_KEY, JSON.stringify(cleanedValue))
}
export async function cleanDataV1(value: DataV1, allMonitors: Monitor[]) {
const { bytes } = memorySizeOf(JSON.stringify(value))
// https://developers.cloudflare.com/kv/platform/limits/
// Value max size 25 MiB, in case of exceptions, we clean data when bytes bigger than 24 MiB.
if (bytes < 24 * aMiB) {
return value
}
const { monitorHistoryData, ...rest } = value
if (!monitorHistoryData) {
return value
}
const historyDates = getHistoryDates()
return {
...rest,
...(Object.keys(monitorHistoryData).filter((item) => {
// Remove monitor data from state if missing in monitors config
return allMonitors.some((monitorItem) => monitorItem.id === item)
}).reduce<Record<string, MonitorAllData>>((previous, current) => {
const { checks, ...restHistoryData } = monitorHistoryData[current]
return {
...previous,
[current]: {
...restHistoryData,
// Remove dates older than config.settings.displayDays
checks: checks.filter((item) => {
return historyDates.includes(item.date)
}),
},
}
}, {})),
}
}
async function getStore() {
ensureWorkerEnv()
// https://developers.cloudflare.com/kv/api/read-key-value-pairs/
let kvData = await KV_STORE.get<DataV1>(DATA_KEY, 'json')
if (!kvData) {
kvData = {}
}
return { kvData }
}
export async function getAllMonitors(useRemoteMonitors = true) {
if (useRemoteMonitors) {
const remoteMonitors = await getRemoteMonitors()
return [...config.monitors, ...remoteMonitors]
}
return config.monitors
}
export async function getCoreData(useRemoteMonitors?: boolean) {
const [allMonitors, { kvData }] = await Promise.all([getAllMonitors(useRemoteMonitors), getStore()])
return {
allMonitors,
kvData,
}
}
export async function prepareData() {
const { allMonitors, kvData } = await getCoreData()
const lastCheckedMonitorIds = kvData.lastUpdate?.checks.ids || []
const uncheckMonitors = lastCheckedMonitorIds.length === 0
? allMonitors
: allMonitors.filter((item) => {
return !lastCheckedMonitorIds.includes(item.id)
})
if (uncheckMonitors.length === 0) {
return {
kvData,
allMonitors,
uncheckMonitors: allMonitors,
lastCheckedMonitorIds: [],
}
}
return {
kvData,
allMonitors,
uncheckMonitors,
lastCheckedMonitorIds,
}
}