52 lines
1.8 KiB
TypeScript
52 lines
1.8 KiB
TypeScript
import { z } from '@/deps.ts';
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/** Validates individual items in an array, dropping any that aren't valid. */
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function filteredArray<T extends z.ZodTypeAny>(schema: T) {
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return z.any().array().catch([])
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.transform((arr) => (
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arr.map((item) => {
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const parsed = schema.safeParse(item);
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return parsed.success ? parsed.data : undefined;
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}).filter((item): item is z.infer<T> => Boolean(item))
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));
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}
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/** Parses a JSON string into its native type. */
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const jsonSchema = z.string().transform((value, ctx) => {
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try {
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return JSON.parse(value) as unknown;
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} catch (_e) {
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ctx.addIssue({ code: z.ZodIssueCode.custom, message: 'Invalid JSON' });
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return z.NEVER;
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}
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});
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/** https://developer.mozilla.org/en-US/docs/Glossary/Base64#the_unicode_problem */
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const decode64Schema = z.string().transform((value, ctx) => {
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try {
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const binString = atob(value);
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const bytes = Uint8Array.from(binString, (m) => m.codePointAt(0)!);
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return new TextDecoder().decode(bytes);
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} catch (_e) {
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ctx.addIssue({ code: z.ZodIssueCode.custom, message: 'Invalid base64', fatal: true });
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return z.NEVER;
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}
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});
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/** Parses a hashtag, eg `#yolo`. */
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const hashtagSchema = z.string().regex(/^\w{1,30}$/);
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/**
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* Limits the length before trying to parse the URL.
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* https://stackoverflow.com/a/417184/8811886
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*/
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const safeUrlSchema = z.string().max(2048).url();
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/** https://github.com/colinhacks/zod/issues/1630#issuecomment-1365983831 */
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const booleanParamSchema = z.enum(['true', 'false']).transform((value) => value === 'true');
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/** Schema for `File` objects. */
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const fileSchema = z.custom<File>((value) => value instanceof File);
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export { booleanParamSchema, decode64Schema, fileSchema, filteredArray, hashtagSchema, jsonSchema, safeUrlSchema };
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