@sinclair/typebox
Version:
Json Schema Type Builder with Static Type Resolution for TypeScript
124 lines (123 loc) • 5.49 kB
JavaScript
import * as Guard from './guard.mjs';
import * as Token from './token.mjs';
// ------------------------------------------------------------------
// Context
// ------------------------------------------------------------------
function ParseContext(moduleProperties, left, right, code, context) {
const result = ParseParser(moduleProperties, left, code, context);
return result.length === 2 ? ParseParser(moduleProperties, right, result[1], result[0]) : [];
}
// ------------------------------------------------------------------
// Array
// ------------------------------------------------------------------
function ParseArray(moduleProperties, parser, code, context) {
const buffer = [];
let rest = code;
while (rest.length > 0) {
const result = ParseParser(moduleProperties, parser, rest, context);
if (result.length === 0)
return [buffer, rest];
buffer.push(result[0]);
rest = result[1];
}
return [buffer, rest];
}
// ------------------------------------------------------------------
// Const
// ------------------------------------------------------------------
function ParseConst(value, code, context) {
return Token.Const(value, code);
}
// ------------------------------------------------------------------
// Ident
// ------------------------------------------------------------------
function ParseIdent(code, _context) {
return Token.Ident(code);
}
// ------------------------------------------------------------------
// Number
// ------------------------------------------------------------------
// prettier-ignore
function ParseNumber(code, _context) {
return Token.Number(code);
}
// ------------------------------------------------------------------
// Optional
// ------------------------------------------------------------------
function ParseOptional(moduleProperties, parser, code, context) {
const result = ParseParser(moduleProperties, parser, code, context);
return (result.length === 2 ? [[result[0]], result[1]] : [[], code]);
}
// ------------------------------------------------------------------
// Ref
// ------------------------------------------------------------------
function ParseRef(moduleProperties, ref, code, context) {
const parser = moduleProperties[ref];
if (!Guard.IsParser(parser))
throw Error(`Cannot dereference Parser '${ref}'`);
return ParseParser(moduleProperties, parser, code, context);
}
// ------------------------------------------------------------------
// String
// ------------------------------------------------------------------
// prettier-ignore
function ParseString(options, code, _context) {
return Token.String(options, code);
}
// ------------------------------------------------------------------
// Tuple
// ------------------------------------------------------------------
function ParseTuple(moduleProperties, parsers, code, context) {
const buffer = [];
let rest = code;
for (const parser of parsers) {
const result = ParseParser(moduleProperties, parser, rest, context);
if (result.length === 0)
return [];
buffer.push(result[0]);
rest = result[1];
}
return [buffer, rest];
}
// ------------------------------------------------------------------
// Union
// ------------------------------------------------------------------
// prettier-ignore
function ParseUnion(moduleProperties, parsers, code, context) {
for (const parser of parsers) {
const result = ParseParser(moduleProperties, parser, code, context);
if (result.length === 0)
continue;
return result;
}
return [];
}
// ------------------------------------------------------------------
// Parser
// ------------------------------------------------------------------
// prettier-ignore
function ParseParser(moduleProperties, parser, code, context) {
const result = (Guard.IsContext(parser) ? ParseContext(moduleProperties, parser.left, parser.right, code, context) :
Guard.IsArray(parser) ? ParseArray(moduleProperties, parser.parser, code, context) :
Guard.IsConst(parser) ? ParseConst(parser.value, code, context) :
Guard.IsIdent(parser) ? ParseIdent(code, context) :
Guard.IsNumber(parser) ? ParseNumber(code, context) :
Guard.IsOptional(parser) ? ParseOptional(moduleProperties, parser.parser, code, context) :
Guard.IsRef(parser) ? ParseRef(moduleProperties, parser.ref, code, context) :
Guard.IsString(parser) ? ParseString(parser.options, code, context) :
Guard.IsTuple(parser) ? ParseTuple(moduleProperties, parser.parsers, code, context) :
Guard.IsUnion(parser) ? ParseUnion(moduleProperties, parser.parsers, code, context) :
[]);
return (result.length === 2
? [parser.mapping(result[0], context), result[1]]
: result);
}
/** Parses content using the given parser */
// prettier-ignore
export function Parse(...args) {
const withModuleProperties = typeof args[1] === 'string' ? false : true;
const [moduleProperties, parser, content, context] = withModuleProperties
? [args[0], args[1], args[2], args[3]]
: [{}, args[0], args[1], args[2]];
return ParseParser(moduleProperties, parser, content, context);
}