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35 lines
892 B
35 lines
892 B
import {Canonical} from './Canonical'
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/**
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* Variant of the Canonical unit whose accessor allows accessing nested
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* properties on the resolved objects.
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*
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* @example
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* The Config unit is a CanonicalRecursive unit. So, once a config file is
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* resolved, a particular value in the config file can be retrieved as well:
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*
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* ```typescript
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* // app/config/my/config.config.ts
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* {
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* foo: {
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* bar: 123
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* }
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* }
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* ```
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*
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* This can be accessed as:
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* ```typescript
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* config.get('my:config.foo.bar') // => 123
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* ```
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*/
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export class CanonicalRecursive extends Canonical<any> {
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public get(key: string, fallback?: unknown): any | undefined {
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const parts = key.split('.')
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let currentValue = this.loadedItems
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for ( const part of parts ) {
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currentValue = currentValue?.[part]
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}
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return currentValue ?? fallback
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}
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}
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