openapi-typescript
Version:
Convert OpenAPI 3.0 & 3.1 schemas to TypeScript
257 lines • 10.1 kB
JavaScript
import { parseRef } from "@redocly/openapi-core/lib/ref-utils.js";
import ts from "typescript";
export const JS_PROPERTY_INDEX_RE = /^[A-Za-z_$][A-Za-z_$0-9]*$/;
export const JS_ENUM_INVALID_CHARS_RE = /[^A-Za-z_$0-9]+(.)?/g;
export const JS_PROPERTY_INDEX_INVALID_CHARS_RE = /[^A-Za-z_$0-9]+/g;
export const BOOLEAN = ts.factory.createKeywordTypeNode(ts.SyntaxKind.BooleanKeyword);
export const FALSE = ts.factory.createLiteralTypeNode(ts.factory.createFalse());
export const NEVER = ts.factory.createKeywordTypeNode(ts.SyntaxKind.NeverKeyword);
export const NULL = ts.factory.createLiteralTypeNode(ts.factory.createNull());
export const NUMBER = ts.factory.createKeywordTypeNode(ts.SyntaxKind.NumberKeyword);
export const QUESTION_TOKEN = ts.factory.createToken(ts.SyntaxKind.QuestionToken);
export const STRING = ts.factory.createKeywordTypeNode(ts.SyntaxKind.StringKeyword);
export const TRUE = ts.factory.createLiteralTypeNode(ts.factory.createTrue());
export const UNDEFINED = ts.factory.createKeywordTypeNode(ts.SyntaxKind.UndefinedKeyword);
export const UNKNOWN = ts.factory.createKeywordTypeNode(ts.SyntaxKind.UnknownKeyword);
const LB_RE = /\r?\n/g;
const COMMENT_RE = /\*\//g;
export function addJSDocComment(schemaObject, node) {
if (!schemaObject ||
typeof schemaObject !== "object" ||
Array.isArray(schemaObject)) {
return;
}
const output = [];
if (schemaObject.title) {
output.push(schemaObject.title.replace(LB_RE, "\n * "));
}
if (schemaObject.summary) {
output.push(schemaObject.summary.replace(LB_RE, "\n * "));
}
if (schemaObject.format) {
output.push(`Format: ${schemaObject.format}`);
}
if (schemaObject.deprecated) {
output.push("@deprecated");
}
const supportedJsDocTags = ["description", "default", "example"];
for (const field of supportedJsDocTags) {
const allowEmptyString = field === "default" || field === "example";
if (schemaObject[field] === undefined) {
continue;
}
if (schemaObject[field] === "" && !allowEmptyString) {
continue;
}
const serialized = typeof schemaObject[field] === "object"
? JSON.stringify(schemaObject[field], null, 2)
: schemaObject[field];
output.push(`@${field} ${String(serialized).replace(LB_RE, "\n * ")}`);
}
if ("const" in schemaObject) {
output.push("@constant");
}
if (schemaObject.enum) {
let type = "unknown";
if (Array.isArray(schemaObject.type)) {
type = schemaObject.type.join("|");
}
else if (typeof schemaObject.type === "string") {
type = schemaObject.type;
}
output.push(`@enum {${type}${schemaObject.nullable ? `|null` : ""}}`);
}
if (output.length) {
let text = output.length === 1
? `* ${output.join("\n")} `
: `*
* ${output.join("\n * ")}\n `;
text = text.replace(COMMENT_RE, "*\\/");
ts.addSyntheticLeadingComment(node, ts.SyntaxKind.MultiLineCommentTrivia, text, true);
}
}
export function oapiRef(path) {
const { pointer } = parseRef(path);
if (pointer.length === 0) {
throw new Error(`Error parsing $ref: ${path}. Is this a valid $ref?`);
}
let t = ts.factory.createTypeReferenceNode(ts.factory.createIdentifier(String(pointer[0])));
if (pointer.length > 1) {
for (let i = 1; i < pointer.length; i++) {
t = ts.factory.createIndexedAccessTypeNode(t, ts.factory.createLiteralTypeNode(typeof pointer[i] === "number"
? ts.factory.createNumericLiteral(pointer[i])
: ts.factory.createStringLiteral(pointer[i])));
}
}
return t;
}
export function astToString(ast, options) {
const sourceFile = ts.createSourceFile(options?.fileName ?? "openapi-ts.ts", options?.sourceText ?? "", ts.ScriptTarget.ESNext, false, ts.ScriptKind.TS);
sourceFile.statements = ts.factory.createNodeArray(Array.isArray(ast) ? ast : [ast]);
const printer = ts.createPrinter({
newLine: ts.NewLineKind.LineFeed,
removeComments: false,
...options?.formatOptions,
});
return printer.printFile(sourceFile);
}
export function stringToAST(source) {
return ts.createSourceFile("stringInput", source, ts.ScriptTarget.ESNext, undefined, undefined).statements;
}
export function tsDedupe(types) {
const encounteredTypes = new Set();
const filteredTypes = [];
for (const t of types) {
if (!("text" in (t.literal ?? t))) {
const { kind } = t.literal ?? t;
if (encounteredTypes.has(kind)) {
continue;
}
if (tsIsPrimitive(t)) {
encounteredTypes.add(kind);
}
}
filteredTypes.push(t);
}
return filteredTypes;
}
export function tsEnum(name, members, metadata, options) {
let enumName = name.replace(JS_ENUM_INVALID_CHARS_RE, (c) => {
const last = c[c.length - 1];
return JS_PROPERTY_INDEX_INVALID_CHARS_RE.test(last)
? ""
: last.toUpperCase();
});
if (Number(name[0]) >= 0) {
enumName = `Value${name}`;
}
enumName = `${enumName[0].toUpperCase()}${enumName.substring(1)}`;
return ts.factory.createEnumDeclaration(options
? tsModifiers({
readonly: options.readonly ?? false,
export: options.export ?? false,
})
: undefined, enumName, members.map((value, i) => tsEnumMember(value, metadata?.[i])));
}
export function tsEnumMember(value, metadata = {}) {
let name = metadata.name ?? String(value);
if (!JS_PROPERTY_INDEX_RE.test(name)) {
if (Number(name[0]) >= 0) {
name = `Value${name}`.replace(".", "_");
}
name = name.replace(JS_PROPERTY_INDEX_INVALID_CHARS_RE, "_");
}
let member;
if (typeof value === "number") {
member = ts.factory.createEnumMember(name, ts.factory.createNumericLiteral(value));
}
else {
member = ts.factory.createEnumMember(name, ts.factory.createStringLiteral(value));
}
if (metadata.description == undefined) {
return member;
}
return ts.addSyntheticLeadingComment(member, ts.SyntaxKind.SingleLineCommentTrivia, " ".concat(metadata.description.trim()), true);
}
export function tsIntersection(types) {
if (types.length === 0) {
return NEVER;
}
if (types.length === 1) {
return types[0];
}
return ts.factory.createIntersectionTypeNode(tsDedupe(types));
}
export function tsIsPrimitive(type) {
if (!type) {
return true;
}
return (ts.SyntaxKind[type.kind] === "BooleanKeyword" ||
ts.SyntaxKind[type.kind] === "NeverKeyword" ||
ts.SyntaxKind[type.kind] === "NullKeyword" ||
ts.SyntaxKind[type.kind] === "NumberKeyword" ||
ts.SyntaxKind[type.kind] === "StringKeyword" ||
ts.SyntaxKind[type.kind] === "UndefinedKeyword" ||
("literal" in type && tsIsPrimitive(type.literal)));
}
export function tsLiteral(value) {
if (typeof value === "string") {
return ts.factory.createLiteralTypeNode(ts.factory.createStringLiteral(value));
}
if (typeof value === "number") {
return ts.factory.createLiteralTypeNode(ts.factory.createNumericLiteral(value));
}
if (typeof value === "boolean") {
return value === true ? TRUE : FALSE;
}
if (value === null) {
return NULL;
}
if (Array.isArray(value)) {
if (value.length === 0) {
return ts.factory.createArrayTypeNode(NEVER);
}
return ts.factory.createTupleTypeNode(value.map((v) => tsLiteral(v)));
}
if (typeof value === "object") {
const keys = [];
for (const [k, v] of Object.entries(value)) {
keys.push(ts.factory.createPropertySignature(undefined, tsPropertyIndex(k), undefined, tsLiteral(v)));
}
return keys.length
? ts.factory.createTypeLiteralNode(keys)
: tsRecord(STRING, NEVER);
}
return UNKNOWN;
}
export function tsModifiers(modifiers) {
const typeMods = [];
if (modifiers.export) {
typeMods.push(ts.factory.createModifier(ts.SyntaxKind.ExportKeyword));
}
if (modifiers.readonly) {
typeMods.push(ts.factory.createModifier(ts.SyntaxKind.ReadonlyKeyword));
}
return typeMods;
}
export function tsNullable(types) {
return ts.factory.createUnionTypeNode([...types, NULL]);
}
export function tsOmit(type, keys) {
return ts.factory.createTypeReferenceNode(ts.factory.createIdentifier("Omit"), [type, ts.factory.createUnionTypeNode(keys.map((k) => tsLiteral(k)))]);
}
export function tsRecord(key, value) {
return ts.factory.createTypeReferenceNode(ts.factory.createIdentifier("Record"), [key, value]);
}
export function tsPropertyIndex(index) {
if ((typeof index === "number" && !(index < 0)) ||
(typeof index === "string" &&
String(Number(index)) === index &&
index[0] !== "-")) {
return ts.factory.createNumericLiteral(index);
}
return typeof index === "string" && JS_PROPERTY_INDEX_RE.test(index)
? ts.factory.createIdentifier(index)
: ts.factory.createStringLiteral(String(index));
}
export function tsUnion(types) {
if (types.length === 0) {
return NEVER;
}
if (types.length === 1) {
return types[0];
}
return ts.factory.createUnionTypeNode(tsDedupe(types));
}
export function tsWithRequired(type, keys, injectFooter) {
if (keys.length === 0) {
return type;
}
if (!injectFooter.some((node) => ts.isTypeAliasDeclaration(node) &&
node?.name?.escapedText === "WithRequired")) {
const helper = stringToAST(`type WithRequired<T, K extends keyof T> = T & { [P in K]-?: T[P] };`)[0];
injectFooter.push(helper);
}
return ts.factory.createTypeReferenceNode(ts.factory.createIdentifier("WithRequired"), [type, tsUnion(keys.map((k) => tsLiteral(k)))]);
}
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