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122 lines
2.9 KiB
122 lines
2.9 KiB
4 months ago
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'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true,
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});
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exports.stripIgnoredCharacters = stripIgnoredCharacters;
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var _blockString = require('../language/blockString.js');
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var _lexer = require('../language/lexer.js');
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var _source = require('../language/source.js');
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var _tokenKind = require('../language/tokenKind.js');
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/**
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* Strips characters that are not significant to the validity or execution
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* of a GraphQL document:
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* - UnicodeBOM
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* - WhiteSpace
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* - LineTerminator
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* - Comment
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* - Comma
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* - BlockString indentation
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*
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* Note: It is required to have a delimiter character between neighboring
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* non-punctuator tokens and this function always uses single space as delimiter.
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*
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* It is guaranteed that both input and output documents if parsed would result
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* in the exact same AST except for nodes location.
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*
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* Warning: It is guaranteed that this function will always produce stable results.
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* However, it's not guaranteed that it will stay the same between different
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* releases due to bugfixes or changes in the GraphQL specification.
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*
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* Query example:
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*
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* ```graphql
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* query SomeQuery($foo: String!, $bar: String) {
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* someField(foo: $foo, bar: $bar) {
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* a
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* b {
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* c
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* d
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* }
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* }
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* }
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* ```
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*
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* Becomes:
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*
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* ```graphql
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* query SomeQuery($foo:String!$bar:String){someField(foo:$foo bar:$bar){a b{c d}}}
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* ```
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*
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* SDL example:
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*
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* ```graphql
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* """
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* Type description
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* """
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* type Foo {
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* """
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* Field description
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* """
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* bar: String
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* }
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* ```
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*
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* Becomes:
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*
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* ```graphql
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* """Type description""" type Foo{"""Field description""" bar:String}
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* ```
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*/
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function stripIgnoredCharacters(source) {
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const sourceObj = (0, _source.isSource)(source)
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? source
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: new _source.Source(source);
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const body = sourceObj.body;
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const lexer = new _lexer.Lexer(sourceObj);
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let strippedBody = '';
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let wasLastAddedTokenNonPunctuator = false;
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while (lexer.advance().kind !== _tokenKind.TokenKind.EOF) {
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const currentToken = lexer.token;
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const tokenKind = currentToken.kind;
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/**
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* Every two non-punctuator tokens should have space between them.
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* Also prevent case of non-punctuator token following by spread resulting
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* in invalid token (e.g. `1...` is invalid Float token).
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*/
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const isNonPunctuator = !(0, _lexer.isPunctuatorTokenKind)(
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currentToken.kind,
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);
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if (wasLastAddedTokenNonPunctuator) {
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if (
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isNonPunctuator ||
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currentToken.kind === _tokenKind.TokenKind.SPREAD
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) {
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strippedBody += ' ';
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}
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}
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const tokenBody = body.slice(currentToken.start, currentToken.end);
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if (tokenKind === _tokenKind.TokenKind.BLOCK_STRING) {
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strippedBody += (0, _blockString.printBlockString)(currentToken.value, {
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minimize: true,
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});
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} else {
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strippedBody += tokenBody;
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}
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wasLastAddedTokenNonPunctuator = isNonPunctuator;
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}
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return strippedBody;
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}
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