90 lines
2.6 KiB
TypeScript
90 lines
2.6 KiB
TypeScript
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import type {CodeKeywordDefinition, KeywordErrorDefinition} from "../../types"
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import type {KeywordCxt} from "../../compile/validate"
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import {_, not, getProperty, Name} from "../../compile/codegen"
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import {checkMetadata} from "./metadata"
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import {checkNullableObject} from "./nullable"
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import {typeErrorMessage, typeErrorParams, _JTDTypeError} from "./error"
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import {DiscrError, DiscrErrorObj} from "../discriminator/types"
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export type JTDDiscriminatorError =
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| _JTDTypeError<"discriminator", "object", string>
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| DiscrErrorObj<DiscrError.Tag>
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| DiscrErrorObj<DiscrError.Mapping>
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const error: KeywordErrorDefinition = {
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message: (cxt) => {
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const {schema, params} = cxt
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return params.discrError
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? params.discrError === DiscrError.Tag
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? `tag "${schema}" must be string`
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: `value of tag "${schema}" must be in mapping`
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: typeErrorMessage(cxt, "object")
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},
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params: (cxt) => {
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const {schema, params} = cxt
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return params.discrError
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? _`{error: ${params.discrError}, tag: ${schema}, tagValue: ${params.tag}}`
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: typeErrorParams(cxt, "object")
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},
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}
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const def: CodeKeywordDefinition = {
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keyword: "discriminator",
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schemaType: "string",
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implements: ["mapping"],
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error,
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code(cxt: KeywordCxt) {
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checkMetadata(cxt)
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const {gen, data, schema, parentSchema} = cxt
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const [valid, cond] = checkNullableObject(cxt, data)
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gen.if(cond)
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validateDiscriminator()
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gen.elseIf(not(valid))
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cxt.error()
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gen.endIf()
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cxt.ok(valid)
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function validateDiscriminator(): void {
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const tag = gen.const("tag", _`${data}${getProperty(schema)}`)
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gen.if(_`${tag} === undefined`)
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cxt.error(false, {discrError: DiscrError.Tag, tag})
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gen.elseIf(_`typeof ${tag} == "string"`)
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validateMapping(tag)
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gen.else()
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cxt.error(false, {discrError: DiscrError.Tag, tag}, {instancePath: schema})
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gen.endIf()
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}
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function validateMapping(tag: Name): void {
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gen.if(false)
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for (const tagValue in parentSchema.mapping) {
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gen.elseIf(_`${tag} === ${tagValue}`)
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gen.assign(valid, applyTagSchema(tagValue))
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}
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gen.else()
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cxt.error(
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false,
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{discrError: DiscrError.Mapping, tag},
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{instancePath: schema, schemaPath: "mapping", parentSchema: true}
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)
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gen.endIf()
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}
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function applyTagSchema(schemaProp: string): Name {
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const _valid = gen.name("valid")
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cxt.subschema(
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{
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keyword: "mapping",
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schemaProp,
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jtdDiscriminator: schema,
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},
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_valid
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)
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return _valid
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}
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},
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}
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export default def
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