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55 lines
1.8 KiB
55 lines
1.8 KiB
3 years ago
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import type {CodeKeywordDefinition, ErrorObject, KeywordErrorDefinition} from "../../types"
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import type {KeywordCxt} from "../../compile/validate"
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import {_, or, Name, Code} from "../../compile/codegen"
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import {useFunc} from "../../compile/util"
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import equal from "../../runtime/equal"
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export type EnumError = ErrorObject<"enum", {allowedValues: any[]}, any[] | {$data: string}>
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const error: KeywordErrorDefinition = {
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message: "must be equal to one of the allowed values",
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params: ({schemaCode}) => _`{allowedValues: ${schemaCode}}`,
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}
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const def: CodeKeywordDefinition = {
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keyword: "enum",
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schemaType: "array",
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$data: true,
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error,
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code(cxt: KeywordCxt) {
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const {gen, data, $data, schema, schemaCode, it} = cxt
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if (!$data && schema.length === 0) throw new Error("enum must have non-empty array")
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const useLoop = schema.length >= it.opts.loopEnum
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let eql: Name | undefined
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const getEql = (): Name => (eql ??= useFunc(gen, equal))
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let valid: Code
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if (useLoop || $data) {
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valid = gen.let("valid")
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cxt.block$data(valid, loopEnum)
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} else {
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/* istanbul ignore if */
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if (!Array.isArray(schema)) throw new Error("ajv implementation error")
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const vSchema = gen.const("vSchema", schemaCode)
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valid = or(...schema.map((_x: unknown, i: number) => equalCode(vSchema, i)))
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}
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cxt.pass(valid)
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function loopEnum(): void {
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gen.assign(valid, false)
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gen.forOf("v", schemaCode as Code, (v) =>
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gen.if(_`${getEql()}(${data}, ${v})`, () => gen.assign(valid, true).break())
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)
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}
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function equalCode(vSchema: Name, i: number): Code {
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const sch = schema[i]
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return typeof sch === "object" && sch !== null
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? _`${getEql()}(${data}, ${vSchema}[${i}])`
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: _`${data} === ${sch}`
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}
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},
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}
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export default def
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