1 | import type {
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2 | CodeKeywordDefinition,
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3 | ErrorObject,
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4 | KeywordErrorDefinition,
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5 | AnySchema,
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6 | } from "../../types"
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7 | import type {SchemaObjCxt} from "../../compile"
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8 | import type {KeywordCxt} from "../../compile/validate"
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9 | import {_, str, not, Name} from "../../compile/codegen"
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10 | import {alwaysValidSchema, checkStrictMode} from "../../compile/util"
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11 |
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12 | export type IfKeywordError = ErrorObject<"if", {failingKeyword: string}, AnySchema>
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13 |
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14 | const error: KeywordErrorDefinition = {
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15 | message: ({params}) => str`must match "${params.ifClause}" schema`,
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16 | params: ({params}) => _`{failingKeyword: ${params.ifClause}}`,
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17 | }
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18 |
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19 | const def: CodeKeywordDefinition = {
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20 | keyword: "if",
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21 | schemaType: ["object", "boolean"],
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22 | trackErrors: true,
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23 | error,
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24 | code(cxt: KeywordCxt) {
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25 | const {gen, parentSchema, it} = cxt
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26 | if (parentSchema.then === undefined && parentSchema.else === undefined) {
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27 | checkStrictMode(it, '"if" without "then" and "else" is ignored')
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28 | }
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29 | const hasThen = hasSchema(it, "then")
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30 | const hasElse = hasSchema(it, "else")
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31 | if (!hasThen && !hasElse) return
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32 |
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33 | const valid = gen.let("valid", true)
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34 | const schValid = gen.name("_valid")
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35 | validateIf()
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36 | cxt.reset()
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37 |
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38 | if (hasThen && hasElse) {
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39 | const ifClause = gen.let("ifClause")
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40 | cxt.setParams({ifClause})
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41 | gen.if(schValid, validateClause("then", ifClause), validateClause("else", ifClause))
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42 | } else if (hasThen) {
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43 | gen.if(schValid, validateClause("then"))
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44 | } else {
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45 | gen.if(not(schValid), validateClause("else"))
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46 | }
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47 |
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48 | cxt.pass(valid, () => cxt.error(true))
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49 |
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50 | function validateIf(): void {
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51 | const schCxt = cxt.subschema(
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52 | {
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53 | keyword: "if",
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54 | compositeRule: true,
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55 | createErrors: false,
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56 | allErrors: false,
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57 | },
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58 | schValid
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59 | )
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60 | cxt.mergeEvaluated(schCxt)
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61 | }
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62 |
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63 | function validateClause(keyword: string, ifClause?: Name): () => void {
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64 | return () => {
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65 | const schCxt = cxt.subschema({keyword}, schValid)
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66 | gen.assign(valid, schValid)
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67 | cxt.mergeValidEvaluated(schCxt, valid)
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68 | if (ifClause) gen.assign(ifClause, _`${keyword}`)
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69 | else cxt.setParams({ifClause: keyword})
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70 | }
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71 | }
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72 | },
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73 | }
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74 |
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75 | function hasSchema(it: SchemaObjCxt, keyword: string): boolean {
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76 | const schema = it.schema[keyword]
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77 | return schema !== undefined && !alwaysValidSchema(it, schema)
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78 | }
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79 |
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80 | export default def
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