use std::fmt;
use std::borrow::Cow;
use std::hash::Hash;
use std::vec;
use std::slice;
use ordermap::OrderMap;
use executor::Variables;
use parser::Spanning;
#[derive(Clone, Eq, PartialEq, Debug)]
pub enum Type<'a> {
Named(Cow<'a, str>),
List(Box<Type<'a>>),
NonNullNamed(Cow<'a, str>),
NonNullList(Box<Type<'a>>),
}
#[derive(Clone, PartialEq, Debug)]
#[allow(missing_docs)]
pub enum InputValue {
Null,
Int(i32),
Float(f64),
String(String),
Boolean(bool),
Enum(String),
Variable(String),
List(Vec<Spanning<InputValue>>),
Object(Vec<(Spanning<String>, Spanning<InputValue>)>),
}
#[derive(Clone, PartialEq, Debug)]
pub struct VariableDefinition<'a> {
pub var_type: Spanning<Type<'a>>,
pub default_value: Option<Spanning<InputValue>>,
}
#[derive(Clone, PartialEq, Debug)]
pub struct Arguments<'a> {
pub items: Vec<(Spanning<&'a str>, Spanning<InputValue>)>,
}
#[derive(Clone, PartialEq, Debug)]
pub struct VariableDefinitions<'a> {
pub items: Vec<(Spanning<&'a str>, VariableDefinition<'a>)>,
}
#[derive(Clone, PartialEq, Debug)]
pub struct Field<'a> {
pub alias: Option<Spanning<&'a str>>,
pub name: Spanning<&'a str>,
pub arguments: Option<Spanning<Arguments<'a>>>,
pub directives: Option<Vec<Spanning<Directive<'a>>>>,
pub selection_set: Option<Vec<Selection<'a>>>,
}
#[derive(Clone, PartialEq, Debug)]
pub struct FragmentSpread<'a> {
pub name: Spanning<&'a str>,
pub directives: Option<Vec<Spanning<Directive<'a>>>>,
}
#[derive(Clone, PartialEq, Debug)]
pub struct InlineFragment<'a> {
pub type_condition: Option<Spanning<&'a str>>,
pub directives: Option<Vec<Spanning<Directive<'a>>>>,
pub selection_set: Vec<Selection<'a>>,
}
#[derive(Clone, PartialEq, Debug)]
#[allow(missing_docs)]
pub enum Selection<'a> {
Field(Spanning<Field<'a>>),
FragmentSpread(Spanning<FragmentSpread<'a>>),
InlineFragment(Spanning<InlineFragment<'a>>),
}
#[derive(Clone, PartialEq, Debug)]
pub struct Directive<'a> {
pub name: Spanning<&'a str>,
pub arguments: Option<Spanning<Arguments<'a>>>,
}
#[derive(Clone, PartialEq, Debug)]
pub enum OperationType {
Query,
Mutation,
}
#[derive(Clone, PartialEq, Debug)]
pub struct Operation<'a> {
pub operation_type: OperationType,
pub name: Option<Spanning<&'a str>>,
pub variable_definitions: Option<Spanning<VariableDefinitions<'a>>>,
pub directives: Option<Vec<Spanning<Directive<'a>>>>,
pub selection_set: Vec<Selection<'a>>,
}
#[derive(Clone, PartialEq, Debug)]
pub struct Fragment<'a> {
pub name: Spanning<&'a str>,
pub type_condition: Spanning<&'a str>,
pub directives: Option<Vec<Spanning<Directive<'a>>>>,
pub selection_set: Vec<Selection<'a>>,
}
#[derive(Clone, PartialEq, Debug)]
pub enum Definition<'a> {
Operation(Spanning<Operation<'a>>),
Fragment(Spanning<Fragment<'a>>),
}
pub type Document<'a> = Vec<Definition<'a>>;
pub trait FromInputValue: Sized {
fn from_input_value(v: &InputValue) -> Option<Self>;
}
pub trait ToInputValue: Sized {
fn to_input_value(&self) -> InputValue;
}
impl<'a> Type<'a> {
pub fn name(&self) -> Option<&str> {
match *self {
Type::Named(ref n) | Type::NonNullNamed(ref n) => Some(n),
_ => None,
}
}
pub fn innermost_name(&self) -> &str {
match *self {
Type::Named(ref n) | Type::NonNullNamed(ref n) => n,
Type::List(ref l) | Type::NonNullList(ref l) => l.innermost_name(),
}
}
pub fn is_non_null(&self) -> bool {
match *self {
Type::NonNullNamed(_) | Type::NonNullList(_) => true,
_ => false,
}
}
}
impl<'a> fmt::Display for Type<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Type::Named(ref n) => write!(f, "{}", n),
Type::NonNullNamed(ref n) => write!(f, "{}!", n),
Type::List(ref t) => write!(f, "[{}]", t),
Type::NonNullList(ref t) => write!(f, "[{}]!", t),
}
}
}
impl InputValue {
pub fn null() -> InputValue {
InputValue::Null
}
pub fn int(i: i32) -> InputValue {
InputValue::Int(i)
}
pub fn float(f: f64) -> InputValue {
InputValue::Float(f)
}
pub fn boolean(b: bool) -> InputValue {
InputValue::Boolean(b)
}
pub fn string<T: AsRef<str>>(s: T) -> InputValue {
InputValue::String(s.as_ref().to_owned())
}
pub fn enum_value<T: AsRef<str>>(s: T) -> InputValue {
InputValue::Enum(s.as_ref().to_owned())
}
pub fn variable<T: AsRef<str>>(v: T) -> InputValue {
InputValue::Variable(v.as_ref().to_owned())
}
pub fn list(l: Vec<InputValue>) -> InputValue {
InputValue::List(l.into_iter().map(Spanning::unlocated).collect())
}
pub fn parsed_list(l: Vec<Spanning<InputValue>>) -> InputValue {
InputValue::List(l)
}
pub fn object<K>(o: OrderMap<K, InputValue>) -> InputValue
where
K: AsRef<str> + Eq + Hash,
{
InputValue::Object(
o.into_iter()
.map(|(k, v)| {
(
Spanning::unlocated(k.as_ref().to_owned()),
Spanning::unlocated(v),
)
})
.collect(),
)
}
pub fn parsed_object(o: Vec<(Spanning<String>, Spanning<InputValue>)>) -> InputValue {
InputValue::Object(o)
}
pub fn into_const(self, vars: &Variables) -> InputValue {
match self {
InputValue::Variable(v) => vars.get(&v).map_or_else(InputValue::null, Clone::clone),
InputValue::List(l) => InputValue::List(
l.into_iter()
.map(|s| s.map(|v| v.into_const(vars)))
.collect(),
),
InputValue::Object(o) => InputValue::Object(
o.into_iter()
.map(|(sk, sv)| (sk, sv.map(|v| v.into_const(vars))))
.collect(),
),
v => v,
}
}
pub fn convert<T>(&self) -> Option<T>
where
T: FromInputValue,
{
<T as FromInputValue>::from_input_value(self)
}
pub fn is_null(&self) -> bool {
match *self {
InputValue::Null => true,
_ => false,
}
}
pub fn is_variable(&self) -> bool {
match *self {
InputValue::Variable(_) => true,
_ => false,
}
}
pub fn as_enum_value(&self) -> Option<&str> {
match *self {
InputValue::Enum(ref e) => Some(e),
_ => None,
}
}
pub fn as_int_value(&self) -> Option<i32> {
match *self {
InputValue::Int(i) => Some(i),
_ => None,
}
}
pub fn as_float_value(&self) -> Option<f64> {
match *self {
InputValue::Float(f) => Some(f),
_ => None,
}
}
pub fn as_string_value(&self) -> Option<&str> {
match *self {
InputValue::String(ref s) => Some(s),
_ => None,
}
}
pub fn to_object_value(&self) -> Option<OrderMap<&str, &InputValue>> {
match *self {
InputValue::Object(ref o) => Some(
o.iter()
.map(|&(ref sk, ref sv)| (sk.item.as_str(), &sv.item))
.collect(),
),
_ => None,
}
}
pub fn to_list_value(&self) -> Option<Vec<&InputValue>> {
match *self {
InputValue::List(ref l) => Some(l.iter().map(|s| &s.item).collect()),
_ => None,
}
}
pub fn referenced_variables(&self) -> Vec<&str> {
match *self {
InputValue::Variable(ref name) => vec![name],
InputValue::List(ref l) => l.iter()
.flat_map(|v| v.item.referenced_variables())
.collect(),
InputValue::Object(ref obj) => obj.iter()
.flat_map(|&(_, ref v)| v.item.referenced_variables())
.collect(),
_ => vec![],
}
}
pub fn unlocated_eq(&self, other: &InputValue) -> bool {
use InputValue::*;
match (self, other) {
(&Null, &Null) => true,
(&Int(i1), &Int(i2)) => i1 == i2,
(&Float(f1), &Float(f2)) => f1 == f2,
(&String(ref s1), &String(ref s2)) |
(&Enum(ref s1), &Enum(ref s2)) |
(&Variable(ref s1), &Variable(ref s2)) => s1 == s2,
(&Boolean(b1), &Boolean(b2)) => b1 == b2,
(&List(ref l1), &List(ref l2)) => l1.iter()
.zip(l2.iter())
.all(|(v1, v2)| v1.item.unlocated_eq(&v2.item)),
(&Object(ref o1), &Object(ref o2)) => {
o1.len() == o2.len() && o1.iter().all(|&(ref sk1, ref sv1)| {
o2.iter().any(|&(ref sk2, ref sv2)| {
sk1.item == sk2.item && sv1.item.unlocated_eq(&sv2.item)
})
})
}
_ => false,
}
}
}
impl fmt::Display for InputValue {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
InputValue::Null => write!(f, "null"),
InputValue::Int(v) => write!(f, "{}", v),
InputValue::Float(v) => write!(f, "{}", v),
InputValue::String(ref v) => write!(f, "\"{}\"", v),
InputValue::Boolean(v) => write!(f, "{}", v),
InputValue::Enum(ref v) => write!(f, "{}", v),
InputValue::Variable(ref v) => write!(f, "${}", v),
InputValue::List(ref v) => {
try!(write!(f, "["));
for (i, spanning) in v.iter().enumerate() {
try!(spanning.item.fmt(f));
if i < v.len() - 1 {
try!(write!(f, ", "));
}
}
write!(f, "]")
}
InputValue::Object(ref o) => {
try!(write!(f, "{{"));
for (i, &(ref k, ref v)) in o.iter().enumerate() {
try!(write!(f, "{}: ", k.item));
try!(v.item.fmt(f));
if i < o.len() - 1 {
try!(write!(f, ", "));
}
}
write!(f, "}}")
}
}
}
}
impl<'a> Arguments<'a> {
pub fn into_iter(self) -> vec::IntoIter<(Spanning<&'a str>, Spanning<InputValue>)> {
self.items.into_iter()
}
pub fn iter(&self) -> slice::Iter<(Spanning<&'a str>, Spanning<InputValue>)> {
self.items.iter()
}
pub fn iter_mut(&mut self) -> slice::IterMut<(Spanning<&'a str>, Spanning<InputValue>)> {
self.items.iter_mut()
}
pub fn len(&self) -> usize {
self.items.len()
}
pub fn get(&self, key: &str) -> Option<&Spanning<InputValue>> {
self.items
.iter()
.filter(|&&(ref k, _)| k.item == key)
.map(|&(_, ref v)| v)
.next()
}
}
impl<'a> VariableDefinitions<'a> {
pub fn iter(&self) -> slice::Iter<(Spanning<&'a str>, VariableDefinition)> {
self.items.iter()
}
}
#[cfg(test)]
mod tests {
use super::InputValue;
use parser::Spanning;
#[test]
fn test_input_value_fmt() {
let value = InputValue::null();
assert_eq!(format!("{}", value), "null");
let value = InputValue::int(123);
assert_eq!(format!("{}", value), "123");
let value = InputValue::float(12.3);
assert_eq!(format!("{}", value), "12.3");
let value = InputValue::string("FOO".to_owned());
assert_eq!(format!("{}", value), "\"FOO\"");
let value = InputValue::boolean(true);
assert_eq!(format!("{}", value), "true");
let value = InputValue::enum_value("BAR".to_owned());
assert_eq!(format!("{}", value), "BAR");
let value = InputValue::variable("baz".to_owned());
assert_eq!(format!("{}", value), "$baz");
let list = vec![InputValue::int(1), InputValue::int(2)];
let value = InputValue::list(list);
assert_eq!(format!("{}", value), "[1, 2]");
let object = vec![
(
Spanning::unlocated("foo".to_owned()),
Spanning::unlocated(InputValue::int(1)),
),
(
Spanning::unlocated("bar".to_owned()),
Spanning::unlocated(InputValue::int(2)),
),
];
let value = InputValue::parsed_object(object);
assert_eq!(format!("{}", value), "{foo: 1, bar: 2}");
}
}