index.js 4.7 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", { value: true });
  3. const codegen_1 = require("../../compile/codegen");
  4. const types_1 = require("../discriminator/types");
  5. const compile_1 = require("../../compile");
  6. const ref_error_1 = require("../../compile/ref_error");
  7. const util_1 = require("../../compile/util");
  8. const error = {
  9. message: ({ params: { discrError, tagName } }) => discrError === types_1.DiscrError.Tag
  10. ? `tag "${tagName}" must be string`
  11. : `value of tag "${tagName}" must be in oneOf`,
  12. params: ({ params: { discrError, tag, tagName } }) => (0, codegen_1._) `{error: ${discrError}, tag: ${tagName}, tagValue: ${tag}}`,
  13. };
  14. const def = {
  15. keyword: "discriminator",
  16. type: "object",
  17. schemaType: "object",
  18. error,
  19. code(cxt) {
  20. const { gen, data, schema, parentSchema, it } = cxt;
  21. const { oneOf } = parentSchema;
  22. if (!it.opts.discriminator) {
  23. throw new Error("discriminator: requires discriminator option");
  24. }
  25. const tagName = schema.propertyName;
  26. if (typeof tagName != "string")
  27. throw new Error("discriminator: requires propertyName");
  28. if (schema.mapping)
  29. throw new Error("discriminator: mapping is not supported");
  30. if (!oneOf)
  31. throw new Error("discriminator: requires oneOf keyword");
  32. const valid = gen.let("valid", false);
  33. const tag = gen.const("tag", (0, codegen_1._) `${data}${(0, codegen_1.getProperty)(tagName)}`);
  34. gen.if((0, codegen_1._) `typeof ${tag} == "string"`, () => validateMapping(), () => cxt.error(false, { discrError: types_1.DiscrError.Tag, tag, tagName }));
  35. cxt.ok(valid);
  36. function validateMapping() {
  37. const mapping = getMapping();
  38. gen.if(false);
  39. for (const tagValue in mapping) {
  40. gen.elseIf((0, codegen_1._) `${tag} === ${tagValue}`);
  41. gen.assign(valid, applyTagSchema(mapping[tagValue]));
  42. }
  43. gen.else();
  44. cxt.error(false, { discrError: types_1.DiscrError.Mapping, tag, tagName });
  45. gen.endIf();
  46. }
  47. function applyTagSchema(schemaProp) {
  48. const _valid = gen.name("valid");
  49. const schCxt = cxt.subschema({ keyword: "oneOf", schemaProp }, _valid);
  50. cxt.mergeEvaluated(schCxt, codegen_1.Name);
  51. return _valid;
  52. }
  53. function getMapping() {
  54. var _a;
  55. const oneOfMapping = {};
  56. const topRequired = hasRequired(parentSchema);
  57. let tagRequired = true;
  58. for (let i = 0; i < oneOf.length; i++) {
  59. let sch = oneOf[i];
  60. if ((sch === null || sch === void 0 ? void 0 : sch.$ref) && !(0, util_1.schemaHasRulesButRef)(sch, it.self.RULES)) {
  61. const ref = sch.$ref;
  62. sch = compile_1.resolveRef.call(it.self, it.schemaEnv.root, it.baseId, ref);
  63. if (sch instanceof compile_1.SchemaEnv)
  64. sch = sch.schema;
  65. if (sch === undefined)
  66. throw new ref_error_1.default(it.opts.uriResolver, it.baseId, ref);
  67. }
  68. const propSch = (_a = sch === null || sch === void 0 ? void 0 : sch.properties) === null || _a === void 0 ? void 0 : _a[tagName];
  69. if (typeof propSch != "object") {
  70. throw new Error(`discriminator: oneOf subschemas (or referenced schemas) must have "properties/${tagName}"`);
  71. }
  72. tagRequired = tagRequired && (topRequired || hasRequired(sch));
  73. addMappings(propSch, i);
  74. }
  75. if (!tagRequired)
  76. throw new Error(`discriminator: "${tagName}" must be required`);
  77. return oneOfMapping;
  78. function hasRequired({ required }) {
  79. return Array.isArray(required) && required.includes(tagName);
  80. }
  81. function addMappings(sch, i) {
  82. if (sch.const) {
  83. addMapping(sch.const, i);
  84. }
  85. else if (sch.enum) {
  86. for (const tagValue of sch.enum) {
  87. addMapping(tagValue, i);
  88. }
  89. }
  90. else {
  91. throw new Error(`discriminator: "properties/${tagName}" must have "const" or "enum"`);
  92. }
  93. }
  94. function addMapping(tagValue, i) {
  95. if (typeof tagValue != "string" || tagValue in oneOfMapping) {
  96. throw new Error(`discriminator: "${tagName}" values must be unique strings`);
  97. }
  98. oneOfMapping[tagValue] = i;
  99. }
  100. }
  101. },
  102. };
  103. exports.default = def;
  104. //# sourceMappingURL=index.js.map