@appsemble/lang-sdk/schemas/utils/extendJSONSchema.js

Language SDK for Appsemble

import { has } from '../../miscellaneous.js';
/**
 * Extend a JSON schema by copying its properties.
 *
 * This creates a new schema based on the input schema, where `required` and `properties` are
 * inherited from the `base` schema.
 *
 * @param base The base schema whose properties to inherit.
 * @param schema The schema overriding the base schema.
 * @param omit Properties to omit from the base schema.
 * @returns The schema which extends the base schema.
 */
export function extendJSONSchema(base, schema, omit = []) {
    const result = { ...schema };
    const required = Array.isArray(schema.required) ? [...schema.required] : [];
    if (Array.isArray(base.required)) {
        for (const name of base.required) {
            if (!required.includes(name) && !omit.includes(name)) {
                required.push(name);
            }
        }
    }
    if (required.length) {
        result.required = required;
    }
    result.properties = { ...schema.properties };
    for (const [name, property] of Object.entries(base.properties ?? {})) {
        if (!omit.includes(name) && !has(result.properties, name)) {
            result.properties[name] = property;
        }
    }
    return result;
}
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