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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| /** | ||
| * Stores settings from Onyx.init globally so they can be made accessible by other parts of the library. | ||
| */ | ||
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| const globalSettings = { | ||
| enablePerformanceMetrics: false, | ||
| }; | ||
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| type GlobalSettings = typeof globalSettings; | ||
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| const listeners = new Set<(settings: GlobalSettings) => unknown>(); | ||
| function addGlobalSettingsChangeListener(listener: (settings: GlobalSettings) => unknown) { | ||
| listeners.add(listener); | ||
| return () => { | ||
| listeners.delete(listener); | ||
| }; | ||
| } | ||
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| function notifyListeners() { | ||
| listeners.forEach((listener) => listener(globalSettings)); | ||
| } | ||
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| function setPerformanceMetricsEnabled(enabled: boolean) { | ||
| globalSettings.enablePerformanceMetrics = enabled; | ||
| notifyListeners(); | ||
| } | ||
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| function isPerformanceMetricsEnabled() { | ||
| return globalSettings.enablePerformanceMetrics; | ||
| } | ||
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| export {setPerformanceMetricsEnabled, isPerformanceMetricsEnabled, addGlobalSettingsChangeListener}; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| type ImportType = ReturnType<typeof require>; | ||
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| /** | ||
| * Create a lazily-imported module proxy. | ||
| * This is useful for lazily requiring optional dependencies. | ||
| */ | ||
| const createModuleProxy = <TModule>(getModule: () => ImportType): TModule => { | ||
| const holder: {module: TModule | undefined} = {module: undefined}; | ||
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| const proxy = new Proxy(holder, { | ||
| get: (target, property) => { | ||
| if (property === '$$typeof') { | ||
| // If inlineRequires is enabled, Metro will look up all imports | ||
| // with the $$typeof operator. In this case, this will throw the | ||
| // `OptionalDependencyNotInstalledError` error because we try to access the module | ||
| // even though we are not using it (Metro does it), so instead we return undefined | ||
| // to bail out of inlineRequires here. | ||
| return undefined; | ||
| } | ||
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| if (target.module == null) { | ||
| // lazy initialize module via require() | ||
| // caller needs to make sure the require() call is wrapped in a try/catch | ||
| // eslint-disable-next-line no-param-reassign | ||
| target.module = getModule() as TModule; | ||
| } | ||
| return target.module[property as keyof typeof holder.module]; | ||
| }, | ||
| }); | ||
| return proxy as unknown as TModule; | ||
| }; | ||
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| class OptionalDependencyNotInstalledError extends Error { | ||
| constructor(name: string) { | ||
| super(`${name} is not installed!`); | ||
| } | ||
| } | ||
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| export {createModuleProxy, OptionalDependencyNotInstalledError}; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| import type performance from 'react-native-performance'; | ||
| import {createModuleProxy, OptionalDependencyNotInstalledError} from '../ModuleProxy'; | ||
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| const PerformanceProxy = createModuleProxy<typeof performance>(() => { | ||
| try { | ||
| // eslint-disable-next-line @typescript-eslint/no-var-requires | ||
| return require('react-native-performance').default; | ||
| } catch { | ||
| throw new OptionalDependencyNotInstalledError('react-native-performance'); | ||
| } | ||
| }); | ||
|
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| export default PerformanceProxy; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| // Use the existing performance API on web | ||
| export default performance; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| import PerformanceProxy from './dependencies/PerformanceProxy'; | ||
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| const decoratedAliases = new Set(); | ||
|
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| /** | ||
| * Capture a measurement between the start mark and now | ||
| */ | ||
| function measureMarkToNow(startMark: PerformanceMark, detail: Record<string, unknown>) { | ||
| PerformanceProxy.measure(`${startMark.name} [${startMark.detail.args.toString()}]`, { | ||
| start: startMark.startTime, | ||
| end: PerformanceProxy.now(), | ||
| detail: {...startMark.detail, ...detail}, | ||
| }); | ||
| } | ||
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| function isPromiseLike(value: unknown): value is Promise<unknown> { | ||
| return value != null && typeof value === 'object' && 'then' in value; | ||
| } | ||
|
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| /** | ||
| * Wraps a function with metrics capturing logic | ||
| */ | ||
| function decorateWithMetrics<Args extends unknown[], ReturnType>(func: (...args: Args) => ReturnType, alias = func.name) { | ||
| if (decoratedAliases.has(alias)) { | ||
| throw new Error(`"${alias}" is already decorated`); | ||
| } | ||
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| decoratedAliases.add(alias); | ||
| function decorated(...args: Args) { | ||
| const mark = PerformanceProxy.mark(alias, {detail: {args, alias}}); | ||
|
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| const originalReturnValue = func(...args); | ||
|
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| if (isPromiseLike(originalReturnValue)) { | ||
| /* | ||
| * The handlers added here are not affecting the original promise | ||
| * They create a separate chain that's not exposed (returned) to the original caller | ||
| */ | ||
| originalReturnValue | ||
| .then((result) => { | ||
| measureMarkToNow(mark, {result}); | ||
| }) | ||
| .catch((error) => { | ||
| measureMarkToNow(mark, {error}); | ||
| }); | ||
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| return originalReturnValue; | ||
| } | ||
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| measureMarkToNow(mark, {result: originalReturnValue}); | ||
| return originalReturnValue; | ||
| } | ||
| decorated.name = `${alias}_DECORATED`; | ||
|
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| return decorated; | ||
| } | ||
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| export default decorateWithMetrics; |
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