100 lines
3 KiB
TypeScript
Executable file
100 lines
3 KiB
TypeScript
Executable file
import type Ajv from "ajv"
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import type {
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Plugin,
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CodeKeywordDefinition,
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KeywordErrorDefinition,
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Code,
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Name,
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ErrorObject,
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} from "ajv"
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import type {AddedFormat} from "ajv/dist/types"
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import type {Rule} from "ajv/dist/compile/rules"
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import {KeywordCxt} from "ajv"
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import {_, str, or, getProperty, operators} from "ajv/dist/compile/codegen"
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type Kwd = "formatMaximum" | "formatMinimum" | "formatExclusiveMaximum" | "formatExclusiveMinimum"
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type Comparison = "<=" | ">=" | "<" | ">"
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const ops = operators
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const KWDs: {[K in Kwd]: {okStr: Comparison; ok: Code; fail: Code}} = {
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formatMaximum: {okStr: "<=", ok: ops.LTE, fail: ops.GT},
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formatMinimum: {okStr: ">=", ok: ops.GTE, fail: ops.LT},
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formatExclusiveMaximum: {okStr: "<", ok: ops.LT, fail: ops.GTE},
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formatExclusiveMinimum: {okStr: ">", ok: ops.GT, fail: ops.LTE},
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}
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export type LimitFormatError = ErrorObject<Kwd, {limit: string; comparison: Comparison}>
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const error: KeywordErrorDefinition = {
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message: ({keyword, schemaCode}) => str`should be ${KWDs[keyword as Kwd].okStr} ${schemaCode}`,
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params: ({keyword, schemaCode}) =>
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_`{comparison: ${KWDs[keyword as Kwd].okStr}, limit: ${schemaCode}}`,
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}
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export const formatLimitDefinition: CodeKeywordDefinition = {
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keyword: Object.keys(KWDs),
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type: "string",
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schemaType: "string",
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$data: true,
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error,
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code(cxt) {
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const {gen, data, schemaCode, keyword, it} = cxt
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const {opts, self} = it
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if (!opts.validateFormats) return
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const fCxt = new KeywordCxt(it, (self.RULES.all.format as Rule).definition, "format")
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if (fCxt.$data) validate$DataFormat()
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else validateFormat()
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function validate$DataFormat(): void {
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const fmts = gen.scopeValue("formats", {
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ref: self.formats,
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code: opts.code.formats,
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})
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const fmt = gen.const("fmt", _`${fmts}[${fCxt.schemaCode}]`)
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cxt.fail$data(
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or(
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_`typeof ${fmt} != "object"`,
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_`${fmt} instanceof RegExp`,
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_`typeof ${fmt}.compare != "function"`,
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compareCode(fmt)
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)
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)
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}
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function validateFormat(): void {
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const format = fCxt.schema as string
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const fmtDef: AddedFormat | undefined = self.formats[format]
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if (!fmtDef || fmtDef === true) return
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if (
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typeof fmtDef != "object" ||
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fmtDef instanceof RegExp ||
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typeof fmtDef.compare != "function"
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) {
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throw new Error(`"${keyword}": format "${format}" does not define "compare" function`)
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}
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const fmt = gen.scopeValue("formats", {
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key: format,
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ref: fmtDef,
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code: opts.code.formats ? _`${opts.code.formats}${getProperty(format)}` : undefined,
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})
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cxt.fail$data(compareCode(fmt))
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}
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function compareCode(fmt: Name): Code {
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return _`${fmt}.compare(${data}, ${schemaCode}) ${KWDs[keyword as Kwd].fail} 0`
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}
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},
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dependencies: ["format"],
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}
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const formatLimitPlugin: Plugin<undefined> = (ajv: Ajv): Ajv => {
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ajv.addKeyword(formatLimitDefinition)
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return ajv
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}
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export default formatLimitPlugin
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