45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
import { GraphQLError } from '../../error/GraphQLError';
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export function unusedVariableMessage(varName, opName) {
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return opName ? "Variable \"$".concat(varName, "\" is never used in operation \"").concat(opName, "\".") : "Variable \"$".concat(varName, "\" is never used.");
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}
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/**
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* No unused variables
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*
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* A GraphQL operation is only valid if all variables defined by an operation
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* are used, either directly or within a spread fragment.
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*/
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export function NoUnusedVariables(context) {
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var variableDefs = [];
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return {
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OperationDefinition: {
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enter: function enter() {
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variableDefs = [];
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},
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leave: function leave(operation) {
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var variableNameUsed = Object.create(null);
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var usages = context.getRecursiveVariableUsages(operation);
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var opName = operation.name ? operation.name.value : null;
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for (var _i2 = 0; _i2 < usages.length; _i2++) {
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var _ref2 = usages[_i2];
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var node = _ref2.node;
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variableNameUsed[node.name.value] = true;
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}
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for (var _i4 = 0, _variableDefs2 = variableDefs; _i4 < _variableDefs2.length; _i4++) {
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var variableDef = _variableDefs2[_i4];
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var variableName = variableDef.variable.name.value;
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if (variableNameUsed[variableName] !== true) {
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context.reportError(new GraphQLError(unusedVariableMessage(variableName, opName), variableDef));
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}
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}
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}
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},
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VariableDefinition: function VariableDefinition(def) {
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variableDefs.push(def);
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}
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};
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}
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