/**
* Find first variable declaration in parent scope of a given variable:
*
* <p>function() { $event = new FooEvent(); dispatch('foo', $event); }
*/
@Nullable
public static String getFirstVariableTypeInScope(@NotNull Variable variable) {
// parent search scope, eg Method else fallback to a grouped statement
PsiElement searchScope = PsiTreeUtil.getParentOfType(variable, Function.class);
if (searchScope == null) {
searchScope = PsiTreeUtil.getParentOfType(variable, GroupStatement.class);
}
if (searchScope == null) {
return null;
}
final String name = variable.getName();
if (name == null) {
return null;
}
final String[] result = {null};
searchScope.acceptChildren(
new PsiRecursiveElementVisitor() {
@Override
public void visitElement(PsiElement element) {
if (element instanceof Variable && name.equals(((Variable) element).getName())) {
PsiElement assignmentExpression = element.getParent();
if (assignmentExpression instanceof AssignmentExpression) {
PhpPsiElement value = ((AssignmentExpression) assignmentExpression).getValue();
if (value instanceof NewExpression) {
ClassReference classReference = ((NewExpression) value).getClassReference();
if (classReference != null) {
String classSignature = classReference.getFQN();
if (StringUtils.isNotBlank(classSignature)) {
result[0] = classSignature;
}
}
}
}
}
super.visitElement(element);
}
});
return result[0];
}
