forked from graphql/graphql-js
/
source.js
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/
source.js
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// @flow strict
import devAssert from '../jsutils/devAssert';
import defineToStringTag from '../jsutils/defineToStringTag';
type Location = {|
line: number,
column: number,
|};
/**
* A representation of source input to GraphQL.
* `name` and `locationOffset` are optional. They are useful for clients who
* store GraphQL documents in source files; for example, if the GraphQL input
* starts at line 40 in a file named Foo.graphql, it might be useful for name to
* be "Foo.graphql" and location to be `{ line: 40, column: 0 }`.
* line and column in locationOffset are 1-indexed
*/
export class Source {
body: string;
name: string;
locationOffset: Location;
constructor(body: string, name?: string, locationOffset?: Location): void {
this.body = body;
this.name = name || 'GraphQL request';
this.locationOffset = locationOffset || { line: 1, column: 1 };
devAssert(
this.locationOffset.line > 0,
'line in locationOffset is 1-indexed and must be positive',
);
devAssert(
this.locationOffset.column > 0,
'column in locationOffset is 1-indexed and must be positive',
);
}
}
// Conditionally apply `[Symbol.toStringTag]` if `Symbol`s are supported
defineToStringTag(Source);