mirror of
https://codeberg.org/timelimit/timelimit-server.git
synced 2026-08-31 19:03:45 +02:00
65 lines
2.2 KiB
TypeScript
65 lines
2.2 KiB
TypeScript
/*
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* server component for the TimeLimit App
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* Copyright (C) 2019 - 2026 Jonas Lochmann
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import { createHash } from 'crypto'
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const updateMessage =
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'Please update the TimeLimit App to the latest release. ' +
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'In your current version, synchronization and purchases may not work as expected.' +
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'\n\n' +
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'Bitte die TimeLimit-App aktualisieren. ' +
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'Mit der momentan installierten Version kann es zu Einschränkungen bei der Synchronisation und bei Käufen kommen.'
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export function getCampaign({ familyId, isClient750OrNewer }: {
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familyId: string
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isClient750OrNewer: boolean
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}): string | undefined {
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const now = Date.now()
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const campaigns = [
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{
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enable: !isClient750OrNewer,
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seed: 'Q05NwM4nyUfiYg6K', // require('crypto').randomBytes(12).toString('base64')
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startTime: 1784160000000, // new Date('2026-07-16').valueOf()
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endTime: 1785369600000, // new Date('2026-07-30').valueOf()
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startPercentage: 0,
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endPercentage: 10,
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message: updateMessage,
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}
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]
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for (const campaign of campaigns) {
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if (!campaign.enable) continue
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if (now < campaign.startTime) continue
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const progress = Math.min((now - campaign.startTime) / (campaign.endTime - campaign.startTime), 1)
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const chanceInPercent = campaign.startPercentage + progress * (campaign.endPercentage - campaign.startPercentage)
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const hasher = createHash('SHA3-224')
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hasher.update(campaign.seed, 'base64')
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hasher.update(familyId)
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const hash = hasher.digest().readUInt32BE(0)
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const match = hash < chanceInPercent * Math.pow(2, 32) / 100
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if (match) return campaign.message
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}
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return undefined
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}
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