1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use apollo_encoder::Type_;
use arbitrary::Result;
use once_cell::sync::Lazy;

use crate::{input_value::InputValue, name::Name, DocumentBuilder};

static BUILTIN_SCALAR_NAMES: Lazy<[Ty; 5]> = Lazy::new(|| {
    [
        Ty::Named(Name::new(String::from("Int"))),
        Ty::Named(Name::new(String::from("Float"))),
        Ty::Named(Name::new(String::from("String"))),
        Ty::Named(Name::new(String::from("Boolean"))),
        Ty::Named(Name::new(String::from("ID"))),
    ]
});

/// Convenience Type_ implementation used when creating a Field.
/// Can be a `NamedType`, a `NonNull` or a `List`.
///
/// This enum is resposible for encoding creating values such as `String!`, `[[[[String]!]!]!]!`, etc.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum Ty {
    /// The Non-Null field type.
    Named(Name),
    /// The List field type.
    List(Box<Ty>),
    /// The Named field type.
    NonNull(Box<Ty>),
}

impl From<Ty> for Type_ {
    fn from(val: Ty) -> Self {
        match val {
            Ty::Named(name) => Type_::NamedType { name: name.into() },
            Ty::List(ty) => Type_::List {
                ty: Box::new((*ty).into()),
            },
            Ty::NonNull(ty) => Type_::NonNull {
                ty: Box::new((*ty).into()),
            },
        }
    }
}

impl Ty {
    pub(crate) fn name(&self) -> &Name {
        match self {
            Ty::Named(name) => name,
            Ty::List(list) => list.name(),
            Ty::NonNull(non_null) => non_null.name(),
        }
    }

    /// Returns `true` if the ty is [`Named`].
    ///
    /// [`Named`]: Ty::Named
    pub fn is_named(&self) -> bool {
        matches!(self, Self::Named(..))
    }
}

impl<'a> DocumentBuilder<'a> {
    /// Create an arbitrary `Ty`
    pub fn ty(&mut self) -> Result<Ty> {
        self.generate_ty(true)
    }

    /// Choose an arbitrary existing `Ty` given a slice of existing types
    pub fn choose_ty(&mut self, existing_types: &[Ty]) -> Result<Ty> {
        self.choose_ty_given_nullable(existing_types, true)
    }

    /// Choose an arbitrary existing named `Ty` given a slice of existing types
    pub fn choose_named_ty(&mut self, existing_types: &[Ty]) -> Result<Ty> {
        let used_type_names: Vec<&Ty> = existing_types
            .iter()
            .chain(BUILTIN_SCALAR_NAMES.iter())
            .collect();

        Ok(self.u.choose(&used_type_names)?.to_owned().clone())
    }

    fn choose_ty_given_nullable(&mut self, existing_types: &[Ty], is_nullable: bool) -> Result<Ty> {
        let ty: Ty = match self.u.int_in_range(0..=2usize)? {
            // Named type
            0 => {
                let used_type_names: Vec<&Ty> = existing_types
                    .iter()
                    .chain(BUILTIN_SCALAR_NAMES.iter())
                    .collect();

                self.u.choose(&used_type_names)?.to_owned().clone()
            }
            // List type
            1 => Ty::List(Box::new(
                self.choose_ty_given_nullable(existing_types, true)?,
            )),
            // Non Null type
            2 => {
                if is_nullable {
                    Ty::NonNull(Box::new(
                        self.choose_ty_given_nullable(existing_types, false)?,
                    ))
                } else {
                    self.choose_ty_given_nullable(existing_types, is_nullable)?
                }
            }
            _ => unreachable!(),
        };

        Ok(ty)
    }

    fn generate_ty(&mut self, is_nullable: bool) -> Result<Ty> {
        let ty = match self.u.int_in_range(0..=2usize)? {
            // Named type
            0 => Ty::Named(self.name()?),
            // List type
            1 => Ty::List(Box::new(self.generate_ty(true)?)),
            // Non Null type
            2 => {
                if is_nullable {
                    Ty::NonNull(Box::new(self.generate_ty(false)?))
                } else {
                    self.generate_ty(is_nullable)?
                }
            }
            _ => unreachable!(),
        };

        Ok(ty)
    }

    /// List all existing (already created) `Ty`
    pub(crate) fn list_existing_types(&self) -> Vec<Ty> {
        self.object_type_defs
            .iter()
            .map(|o| Ty::Named(o.name.clone()))
            .chain(
                self.enum_type_defs
                    .iter()
                    .map(|e| Ty::Named(e.name.clone())),
            )
            .collect()
    }

    /// List all existing object (already created) `Ty`
    pub(crate) fn list_existing_object_types(&self) -> Vec<Ty> {
        self.object_type_defs
            .iter()
            .map(|o| Ty::Named(o.name.clone()))
            .collect()
    }

    #[allow(dead_code)]
    pub(crate) fn generate_value_for_type(&mut self, _ty: &Ty) -> InputValue {
        todo!()
    }
}