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feat(config): add remote configuration (#2152)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| /** | ||
| * Ghostery Browser Extension | ||
| * https://www.ghostery.com/ | ||
| * | ||
| * Copyright 2017-present Ghostery GmbH. All rights reserved. | ||
| * | ||
| * This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0 | ||
| */ | ||
|
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| import { store } from 'hybrids'; | ||
|
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| import Config from '/store/config.js'; | ||
| import { CDN_URL } from '/utils/api.js'; | ||
|
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| const CONFIG_URL = CDN_URL + 'configs/v1.json'; | ||
|
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| function filter(item) { | ||
| if (item.filter) { | ||
| const { platform } = item.filter; | ||
| let check = true; | ||
|
|
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| // Browser check | ||
| if (check && Array.isArray(platform)) { | ||
| check = platform.includes(__PLATFORM__); | ||
| } | ||
|
|
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| return check; | ||
| } | ||
|
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| return true; | ||
| } | ||
|
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| const HALF_HOUR_IN_MS = 1000 * 60 * 30; | ||
|
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| export default async function syncConfig() { | ||
| const config = await store.resolve(Config); | ||
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| if (config.updatedAt > Date.now() - HALF_HOUR_IN_MS) { | ||
| return; | ||
| } | ||
|
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| // TODO: implement fetching remote config from the server | ||
| // This is a mock of the fetched config | ||
| try { | ||
| const fetchedConfig = await fetch(CONFIG_URL).then((res) => { | ||
| if (!res.ok) throw new Error('Failed to fetch the remote config'); | ||
| return res.json(); | ||
| }); | ||
|
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| // -- domains -- | ||
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| const domains = { ...config.domains }; | ||
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| // Clear out domains removed from the config | ||
| for (const name of Object.keys(domains)) { | ||
| if (fetchedConfig.domains[name] === undefined) { | ||
| domains[name] = null; | ||
| } | ||
| } | ||
|
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| // Update the config with new values | ||
| for (const [name, item] of Object.entries(fetchedConfig.domains)) { | ||
| domains[name] = filter(item) ? item : null; | ||
| } | ||
|
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| // -- flags -- | ||
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| const flags = { ...config.flags }; | ||
|
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| // Clear out flags removed from the config | ||
| for (const name of Object.keys(flags)) { | ||
| if (fetchedConfig.flags[name] === undefined) { | ||
| flags[name] = null; | ||
| } | ||
| } | ||
|
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| // Update the config with the new values | ||
| for (const [name, items] of Object.entries(fetchedConfig.flags)) { | ||
| const item = items.find((item) => filter(item)); | ||
| if (!item) { | ||
| flags[name] = null; | ||
| continue; | ||
| } | ||
| // Generate local percentage only once for each flag | ||
| const percentage = | ||
| flags[name]?.percentage || Math.floor(Math.random() * 100) + 1; | ||
|
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| flags[name] = { | ||
| percentage, | ||
| enabled: percentage <= item.percentage, | ||
| }; | ||
| } | ||
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| // Update the config | ||
| store.set(Config, { | ||
| updatedAt: Date.now(), | ||
| domains, | ||
| flags, | ||
| }); | ||
| } catch (e) { | ||
| console.error('[config] Failed to sync remote config:', e); | ||
| } | ||
| } | ||
|
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| syncConfig(); |
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