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50 lines
1.4 KiB
50 lines
1.4 KiB
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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