patternRequired.ts
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patternRequired.ts
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			import type {CodeKeywordDefinition, KeywordCxt, KeywordErrorDefinition, ErrorObject} from "ajv"
			import {_, str, and} from "ajv/dist/compile/codegen"
			import {usePattern} from "./_util"

			export type PatternRequiredError = ErrorObject<"patternRequired", {missingPattern: string}>

			const error: KeywordErrorDefinition = {
			message: ({params: {missingPattern}}) =>
			str`should have property matching pattern '${missingPattern}'`,
			params: ({params: {missingPattern}}) => _`{missingPattern: ${missingPattern}}`,
			}

			export default function getDef(): CodeKeywordDefinition {
			return {
			keyword: "patternRequired",
			type: "object",
			schemaType: "array",
			error,
			code(cxt: KeywordCxt) {
			const {gen, schema, data} = cxt
			if (schema.length === 0) return
			const valid = gen.let("valid", true)
			for (const pat of schema) validateProperties(pat)

			function validateProperties(pattern: string): void {
			const matched = gen.let("matched", false)

			gen.forIn("key", data, (key) => {
			gen.assign(matched, _`${usePattern(cxt, pattern)}.test(${key})`)
			gen.if(matched, () => gen.break())
			})

			cxt.setParams({missingPattern: pattern})
			gen.assign(valid, and(valid, matched))
			cxt.pass(valid)
			}
			},
			metaSchema: {
			type: "array",
			items: {type: "string", format: "regex"},
			uniqueItems: true,
			},
			}
			}

			module.exports = getDef