runWithReporter method

@override void runWithReporter(SaropaDiagnosticReporter reporter, SaropaContext context)

Override this method to implement your lint rule.

Use context to register callbacks for AST node types:

context.addMethodInvocation((node) {
  if (condition) {
    reporter.atNode(node);
  }
});

Implementation

@override
void runWithReporter(
  SaropaDiagnosticReporter reporter,
  SaropaContext context,
) {
  context.addMethodInvocation((MethodInvocation node) {
    if (!_multiMethods.contains(node.methodName.name)) return;
    if (!fileImportsPackage(node, PackageImports.imagePicker)) return;

    final AstNode? awaitNode = node.parent;
    if (awaitNode is! AwaitExpression) return;
    final AstNode? decl = awaitNode.parent;
    if (decl is! VariableDeclaration) return;
    final String varName = decl.name.lexeme;

    final FunctionBody? body = _enclosingMemberBody(node);
    if (body == null) return;
    final _MemberScan scan = _MemberScan();
    body.accept(scan);

    // No emptiness guard anywhere on the var → unsafe.
    if (scan.hasEmptinessGuard(varName)) return;

    for (final IndexExpression index in scan.indexExpressions) {
      final Expression target = index.realTarget;
      if (target is SimpleIdentifier && target.name == varName) {
        reporter.atNode(index);
      }
    }
  });
}