astro-zod-to-json-schema/dist/astro-zod-to-json-schema.js

Auto-generate JSON schemas from your Astro's Content Collections Zod schemas.

import fs from "node:fs";
import path from "node:path";
// NOTE: Most typings are overlooked for now.
// This can be enhanced by leveraging more of Astro's public APIs?
// It's not that critical for dev. tooling like this lib,
// and Astro's CC / Assets API are still subject to
// substantial changes anyway.
import { z } from "zod";
import { zodToJsonSchema } from "zod-to-json-schema";
export async function astroZodCollectionsToJsonSchemas(
// FIXME: Some types are not accessible publiquely
// collectionConfig: ReturnType<typeof defineCollection<any>>
collectionConfig) {
    await Promise.all(Object.entries(collectionConfig).map(async ([key, collection]) => {
        console.info(`Generating JSON Schema for collection "${key}"`);
        // STUB!
        // NOTE: Beware, for future maintenance, syncing is needed
        // (or find a better solution, once APIs are more mature / exposed)
        const context = {
            image: () => {
                return z.object({
                    src: z.string(),
                    width: z.number(),
                    height: z.number(),
                    format: z.union([
                        z.literal("png"),
                        z.literal("jpg"),
                        z.literal("jpeg"),
                        z.literal("tiff"),
                        z.literal("webp"),
                        z.literal("gif"),
                        z.literal("svg"),
                        z.literal("avif"),
                    ]),
                });
            },
        };
        const schema = 
        // @ts-expect-error ...
        typeof collection.schema === "function"
            ? // @ts-expect-error ...
                collection.schema(context)
            : // @ts-expect-error ...
                collection.schema;
        const builtJsonSchema = zodToJsonSchema(schema);
        fs.promises.writeFile(path.join(process.cwd(), "/src/content/", key, `_${key}.schema.json`), JSON.stringify(builtJsonSchema, null, 2));
    }));
}