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51 lines
1.4 KiB
51 lines
1.4 KiB
4 months ago
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import { devAssert } from '../jsutils/devAssert.mjs';
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import { inspect } from '../jsutils/inspect.mjs';
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import { instanceOf } from '../jsutils/instanceOf.mjs';
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/**
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* A representation of source input to GraphQL. The `name` and `locationOffset` parameters are
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* optional, but they are useful for clients who store GraphQL documents in source files.
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* For example, if the GraphQL input starts at line 40 in a file named `Foo.graphql`, it might
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* be useful for `name` to be `"Foo.graphql"` and location to be `{ line: 40, column: 1 }`.
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* The `line` and `column` properties in `locationOffset` are 1-indexed.
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*/
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export class Source {
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constructor(
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body,
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name = 'GraphQL request',
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locationOffset = {
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line: 1,
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column: 1,
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},
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) {
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typeof body === 'string' ||
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devAssert(false, `Body must be a string. Received: ${inspect(body)}.`);
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this.body = body;
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this.name = name;
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this.locationOffset = locationOffset;
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this.locationOffset.line > 0 ||
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devAssert(
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false,
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'line in locationOffset is 1-indexed and must be positive.',
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);
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this.locationOffset.column > 0 ||
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devAssert(
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false,
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'column in locationOffset is 1-indexed and must be positive.',
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);
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}
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get [Symbol.toStringTag]() {
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return 'Source';
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}
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}
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/**
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* Test if the given value is a Source object.
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*
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* @internal
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*/
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export function isSource(source) {
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return instanceOf(source, Source);
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}
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