/
typeAssert.ts
54 lines (45 loc) · 1.3 KB
/
typeAssert.ts
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import { first } from 'my-easy-fp';
export function isValidPrimitiveType(value: unknown): value is string | boolean | number | Date {
if (
typeof value === 'string' ||
typeof value === 'boolean' ||
typeof value === 'number' ||
(typeof value === 'object' && value instanceof Date)
) {
return true;
}
return false;
}
export function isValidArrayType(value: unknown): value is string[] | boolean[] | number[] | Date[] {
if (typeof value === 'object' && Array.isArray(value)) {
if (
typeof first(value) === 'string' ||
typeof first(value) === 'boolean' ||
typeof first(value) === 'number' ||
(typeof first(value) === 'object' && first(value) instanceof Date)
) {
return true;
}
return false;
}
return false;
}
export function typeAssert(strict: boolean, value: unknown): boolean {
if (isValidPrimitiveType(value)) {
return true;
}
if (typeof value === 'object' && Array.isArray(value)) {
if (
typeof first(value) === 'string' ||
typeof first(value) === 'boolean' ||
typeof first(value) === 'number' ||
(typeof first(value) === 'object' && first(value) instanceof Date)
) {
return true;
}
}
if (strict) {
throw new Error(`invalid type value: ${typeof value}`);
}
return false;
}