1 | import { GraphQLError } from "../../error/GraphQLError.mjs";
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8 | export function UniqueFragmentNamesRule(context) {
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9 | var knownFragmentNames = Object.create(null);
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10 | return {
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11 | OperationDefinition: function OperationDefinition() {
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12 | return false;
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13 | },
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14 | FragmentDefinition: function FragmentDefinition(node) {
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15 | var fragmentName = node.name.value;
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16 |
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17 | if (knownFragmentNames[fragmentName]) {
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18 | context.reportError(new GraphQLError("There can be only one fragment named \"".concat(fragmentName, "\"."), [knownFragmentNames[fragmentName], node.name]));
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19 | } else {
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20 | knownFragmentNames[fragmentName] = node.name;
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21 | }
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22 |
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23 | return false;
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24 | }
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25 | };
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26 | }
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