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move server status monitor into background
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101 changes: 101 additions & 0 deletions
101
packages/yoroi-extension/chrome/extension/background/serverStatus.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // @flow | ||
| import { ConceptualWalletSchema } from '../../../app/api/ada/lib/storage/database/walletTypes/core/tables'; | ||
| import { raii, getAll } from '../../../app/api/ada/lib/storage/database/utils'; | ||
| import { getDb } from './state'; | ||
| import { networks } from '../../../app/api/ada/lib/storage/database/prepackaged/networks'; | ||
| import type { NetworkRow } from '../../../app/api/ada/lib/storage/database/primitives/tables'; | ||
| import type { ConceptualWalletRow } from '../../../app/api/ada/lib/storage/database/walletTypes/core/tables'; | ||
| import { getCommonStateFetcher } from './utils'; | ||
| import environment from '../../../app/environment'; | ||
| import type { ServerStatus } from './types'; | ||
| import { | ||
| getSubscriptions, | ||
| registerCallback, | ||
| emitUpdateToSubscriptions, | ||
| } from './subscriptionManager'; | ||
|
|
||
| const serverStatusByNetworkId: Map<number, ServerStatus> = new Map(); | ||
|
|
||
| async function getAllNetworks(): Promise<$ReadOnlyArray<NetworkRow>> { | ||
| const db = await getDb(); | ||
| const allConceptualWallets = await raii<$ReadOnlyArray<ConceptualWalletRow>>( | ||
| db, | ||
| [], | ||
| tx => getAll( | ||
| db, tx, | ||
| ConceptualWalletSchema.name, | ||
| ) | ||
| ); | ||
| const allNetworkIdSet = new Set(allConceptualWallets.map(w => w.NetworkId)); | ||
| return Object.keys(networks).map(n => networks[n]).filter( | ||
| ({ NetworkId }) => allNetworkIdSet.has(NetworkId) | ||
| ); | ||
| } | ||
|
|
||
| async function updateServerStatus() { | ||
| const networks = await getAllNetworks(); | ||
| const fetcher = await getCommonStateFetcher(); | ||
|
|
||
| for (const network of networks) { | ||
| const backend = network.Backend.BackendServiceZero; | ||
| if (!backend) { | ||
| throw new Error('unexpectedly missing backend zero'); | ||
| } | ||
| const startTime = Date.now(); | ||
| let resp; | ||
| try { | ||
| resp = await fetcher.checkServerStatus({ backend }); | ||
| } catch { | ||
| continue; | ||
| } | ||
| const endTime = Date.now(); | ||
| const roundtripTime = endTime - startTime; | ||
|
|
||
| serverStatusByNetworkId.set( | ||
| network.NetworkId, | ||
| { | ||
| networkId: network.NetworkId, | ||
| isServerOk: resp.isServerOk, | ||
| isMaintenance: resp.isMaintenance || false, | ||
| // server time = local time + clock skew | ||
| clockSkew: resp.serverTime + roundtripTime / 2 - endTime, | ||
| lastUpdateTimestamp: startTime + roundtripTime / 2, | ||
| } | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| let lastUpdateTimestamp: number = 0; | ||
| let updatePromise: null | Promise<void> = null; | ||
|
|
||
| async function updateServerStatusTick() { | ||
| const refreshInterval = environment.getServerStatusRefreshInterval(); | ||
|
|
||
| if (getSubscriptions().length === 0) { | ||
| return; | ||
| } | ||
|
|
||
| if (Date.now() - lastUpdateTimestamp > refreshInterval) { | ||
| if (!updatePromise) { | ||
| updatePromise = updateServerStatus(); | ||
| } | ||
| await updatePromise; | ||
| updatePromise = null; | ||
| lastUpdateTimestamp = Date.now(); | ||
| } | ||
|
|
||
| emitUpdateToSubscriptions({ | ||
| type: 'server-status-update', | ||
| params: [...serverStatusByNetworkId.values()], | ||
| }); | ||
|
|
||
| setTimeout(updateServerStatusTick, refreshInterval); | ||
| } | ||
|
|
||
| export function startMonitorServerStatus() { | ||
| registerCallback(params => { | ||
| if (params.type === 'subscriptionChange') { | ||
| updateServerStatusTick(); | ||
| } | ||
| }); | ||
| } |
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