source: trip-planner-front/node_modules/ajv/lib/vocabularies/jtd/discriminator.ts@ 8d391a1

Last change on this file since 8d391a1 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1import type {CodeKeywordDefinition, KeywordErrorDefinition} from "../../types"
2import type {KeywordCxt} from "../../compile/validate"
3import {_, not, getProperty, Name} from "../../compile/codegen"
4import {checkMetadata} from "./metadata"
5import {checkNullableObject} from "./nullable"
6import {typeErrorMessage, typeErrorParams, _JTDTypeError} from "./error"
7import {DiscrError, DiscrErrorObj} from "../discriminator/types"
8
9export type JTDDiscriminatorError =
10 | _JTDTypeError<"discriminator", "object", string>
11 | DiscrErrorObj<DiscrError.Tag>
12 | DiscrErrorObj<DiscrError.Mapping>
13
14const error: KeywordErrorDefinition = {
15 message: (cxt) => {
16 const {schema, params} = cxt
17 return params.discrError
18 ? params.discrError === DiscrError.Tag
19 ? `tag "${schema}" must be string`
20 : `value of tag "${schema}" must be in mapping`
21 : typeErrorMessage(cxt, "object")
22 },
23 params: (cxt) => {
24 const {schema, params} = cxt
25 return params.discrError
26 ? _`{error: ${params.discrError}, tag: ${schema}, tagValue: ${params.tag}}`
27 : typeErrorParams(cxt, "object")
28 },
29}
30
31const def: CodeKeywordDefinition = {
32 keyword: "discriminator",
33 schemaType: "string",
34 implements: ["mapping"],
35 error,
36 code(cxt: KeywordCxt) {
37 checkMetadata(cxt)
38 const {gen, data, schema, parentSchema} = cxt
39 const [valid, cond] = checkNullableObject(cxt, data)
40
41 gen.if(cond)
42 validateDiscriminator()
43 gen.elseIf(not(valid))
44 cxt.error()
45 gen.endIf()
46 cxt.ok(valid)
47
48 function validateDiscriminator(): void {
49 const tag = gen.const("tag", _`${data}${getProperty(schema)}`)
50 gen.if(_`${tag} === undefined`)
51 cxt.error(false, {discrError: DiscrError.Tag, tag})
52 gen.elseIf(_`typeof ${tag} == "string"`)
53 validateMapping(tag)
54 gen.else()
55 cxt.error(false, {discrError: DiscrError.Tag, tag}, {instancePath: schema})
56 gen.endIf()
57 }
58
59 function validateMapping(tag: Name): void {
60 gen.if(false)
61 for (const tagValue in parentSchema.mapping) {
62 gen.elseIf(_`${tag} === ${tagValue}`)
63 gen.assign(valid, applyTagSchema(tagValue))
64 }
65 gen.else()
66 cxt.error(
67 false,
68 {discrError: DiscrError.Mapping, tag},
69 {instancePath: schema, schemaPath: "mapping", parentSchema: true}
70 )
71 gen.endIf()
72 }
73
74 function applyTagSchema(schemaProp: string): Name {
75 const _valid = gen.name("valid")
76 cxt.subschema(
77 {
78 keyword: "mapping",
79 schemaProp,
80 jtdDiscriminator: schema,
81 },
82 _valid
83 )
84 return _valid
85 }
86 },
87}
88
89export default def
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