58 lines
1.8 KiB
Rust
58 lines
1.8 KiB
Rust
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use crate::validation::context::ValidatorContext;
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use crate::validation::visitor::Visitor;
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use graphql_parser::query::{Field, OperationDefinition, VariableDefinition};
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use graphql_parser::schema::{Directive, Value};
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use graphql_parser::Pos;
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use std::collections::HashSet;
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#[derive(Default)]
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pub struct NoUndefinedVariables<'a> {
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vars: HashSet<&'a str>,
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pos_stack: Vec<Pos>,
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}
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impl<'a> Visitor<'a> for NoUndefinedVariables<'a> {
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fn enter_operation_definition(
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&mut self,
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_ctx: &mut ValidatorContext<'a>,
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_operation_definition: &'a OperationDefinition,
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) {
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self.vars.clear();
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}
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fn enter_variable_definition(
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&mut self,
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_ctx: &mut ValidatorContext<'a>,
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variable_definition: &'a VariableDefinition,
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) {
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self.vars.insert(&variable_definition.name);
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}
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fn enter_directive(&mut self, _ctx: &mut ValidatorContext<'a>, directive: &'a Directive) {
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self.pos_stack.push(directive.position);
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}
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fn exit_directive(&mut self, _ctx: &mut ValidatorContext<'a>, _directive: &'a Directive) {
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self.pos_stack.pop();
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}
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fn enter_argument(&mut self, ctx: &mut ValidatorContext<'a>, _name: &str, value: &'a Value) {
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if let Value::Variable(var_name) = value {
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if !self.vars.contains(var_name.as_str()) {
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ctx.report_error(
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vec![self.pos_stack.last().cloned().unwrap()],
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format!("Variable \"${}\" is not defined", var_name),
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);
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}
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}
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}
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fn enter_field(&mut self, _ctx: &mut ValidatorContext<'a>, field: &'a Field) {
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self.pos_stack.push(field.position);
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}
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fn exit_field(&mut self, _ctx: &mut ValidatorContext<'a>, _field: &'a Field) {
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self.pos_stack.pop();
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}
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}
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