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36 lines
1 KiB
TypeScript
36 lines
1 KiB
TypeScript
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import { snakeCase } from "case-anything";
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// https://stackoverflow.com/questions/60269936/typescript-convert-generic-object-from-snake-to-camel-case
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// Typescript magic to convert any string from camelCase to snake_case at compile time
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type SnakeCase<S> =
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S extends string ?
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S extends `${infer T}${infer U}` ?
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`${T extends Capitalize<T> ? "_" : ""}${Lowercase<T>}${SnakeCase<U>}` :
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S :
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S;
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type SnakeCased<Type> = {
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[Property in keyof Type as SnakeCase<Property>]: SnakeCased<Type[Property]>
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}
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export default function snakeCaseTree<T>(object: T): SnakeCased<T> {
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const snakeObject: any = {};
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for (const key in object) {
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snakeObject[snakeCase(key)] = snakeCaseValue(object[key]);
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}
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return snakeObject;
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}
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function snakeCaseValue(value: any): any {
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if (typeof value === "object") {
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if (Array.isArray(value)) {
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return value.map(snakeCaseValue);
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} else {
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return snakeCaseTree(value);
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}
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} else {
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return value;
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}
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}
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