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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.NoUnusedVariablesRule = NoUnusedVariablesRule;
var _GraphQLError = require("../../error/GraphQLError.js");
/**
* No unused variables
*
* A GraphQL operation is only valid if all variables defined by an operation
* are used, either directly or within a spread fragment.
*/
function NoUnusedVariablesRule(context) {
var variableDefs = [];
return {
OperationDefinition: {
enter: function enter() {
variableDefs = [];
},
leave: function leave(operation) {
var variableNameUsed = Object.create(null);
var usages = context.getRecursiveVariableUsages(operation);
for (var _i2 = 0; _i2 < usages.length; _i2++) {
var _ref2 = usages[_i2];
var node = _ref2.node;
variableNameUsed[node.name.value] = true;
}
for (var _i4 = 0, _variableDefs2 = variableDefs; _i4 < _variableDefs2.length; _i4++) {
var variableDef = _variableDefs2[_i4];
var variableName = variableDef.variable.name.value;
if (variableNameUsed[variableName] !== true) {
context.reportError(new _GraphQLError.GraphQLError(operation.name ? "Variable \"$".concat(variableName, "\" is never used in operation \"").concat(operation.name.value, "\".") : "Variable \"$".concat(variableName, "\" is never used."), variableDef));
}
}
}
},
VariableDefinition: function VariableDefinition(def) {
variableDefs.push(def);
}
};
}
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