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use std::fmt::Display;
#[derive(Debug, Clone, PartialEq)]
pub enum JsonValue {
String(String),
Integer(i64),
Float(f64),
Boolean(bool),
Null,
}
impl JsonValue {
/// Checks if the value is the `JsonValue::String` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let string_value = JsonValue::String("Hello World!".to_owned());
/// let non_string_value = JsonValue::Null;
///
/// assert!(string_value.is_string());
/// assert!(!non_string_value.is_string());
/// ```
pub fn is_string(&self) -> bool {
match self {
JsonValue::String(_) => true,
_ => false,
}
}
/// Checks if the value is the `JsonValue::Integer` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let integer_value = JsonValue::Integer(42);
/// let non_integer_value = JsonValue::Null;
///
/// assert!(integer_value.is_integer());
/// assert!(!non_integer_value.is_integer());
/// ```
pub fn is_integer(&self) -> bool {
match self {
JsonValue::Integer(_) => true,
_ => false,
}
}
/// Checks if the value is the `JsonValue::Float` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let float_value = JsonValue::Float(3.14);
/// let non_float_value = JsonValue::Null;
///
/// assert!(float_value.is_float());
/// assert!(!non_float_value.is_float());
/// ```
pub fn is_float(&self) -> bool {
match self {
JsonValue::Float(_) => true,
_ => false,
}
}
/// Checks if the value is the `JsonValue::Boolean` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let bool_value = JsonValue::Boolean(true);
/// let non_bool_value = JsonValue::Null;
///
/// assert!(bool_value.is_bool());
/// assert!(!non_bool_value.is_bool());
/// ```
pub fn is_bool(&self) -> bool {
match self {
JsonValue::Boolean(_) => true,
_ => false,
}
}
/// Checks if the value is the `JsonValue::Null` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let null_value = JsonValue::Null;
/// let non_null_value = JsonValue::Integer(42);
///
/// assert!(null_value.is_null());
/// assert!(!non_null_value.is_null());
/// ```
pub fn is_null(&self) -> bool {
match self {
JsonValue::Null => true,
_ => false,
}
}
/// Extracts the inner `str` contained inside the node if it is the `JsonValue::String` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let string_value = JsonValue::String("Hello World!".to_owned());
/// let non_string_value = JsonValue::Null;
///
/// assert_eq!(string_value.as_string(), Some("Hello World!"));
/// assert_eq!(non_string_value.as_string(), None);
/// ```
pub fn as_string(&self) -> Option<&str> {
match self {
JsonValue::String(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `i64` contained inside the node if it is the `JsonValue::Integer` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let integer_value = JsonValue::Integer(42);
/// let non_integer_value = JsonValue::Null;
///
/// assert_eq!(integer_value.as_integer(), Some(&42));
/// assert_eq!(non_integer_value.as_integer(), None);
/// ```
pub fn as_integer(&self) -> Option<&i64> {
match self {
JsonValue::Integer(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `f64` contained inside the node if it is the `JsonValue::Float` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let float_value = JsonValue::Float(3.14);
/// let non_float_value = JsonValue::Null;
///
/// assert_eq!(float_value.as_float(), Some(&3.14));
/// assert_eq!(non_float_value.as_float(), None);
/// ```
pub fn as_float(&self) -> Option<&f64> {
match self {
JsonValue::Float(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `bool` contained inside the node if it is the `JsonValue::Boolean` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let bool_value = JsonValue::Boolean(true);
/// let non_bool_value = JsonValue::Null;
///
/// assert_eq!(bool_value.as_boolean(), Some(&true));
/// assert_eq!(non_bool_value.as_boolean(), None);
/// ```
pub fn as_boolean(&self) -> Option<&bool> {
match self {
JsonValue::Boolean(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `mut str` contained inside the node if it is the `JsonValue::String` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let mut string_value = JsonValue::String("Hello World!".to_owned());
/// let mut non_string_value = JsonValue::Null;
///
/// assert_eq!(string_value.as_string_mut(), Some("Hello World!".to_string().as_mut_str()));
/// assert_eq!(non_string_value.as_string_mut(), None);
/// ```
pub fn as_string_mut(&mut self) -> Option<&mut str> {
match self {
JsonValue::String(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `mut i64` contained inside the node if it is the `JsonValue::Integer` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let mut integer_value = JsonValue::Integer(42);
/// let mut non_integer_value = JsonValue::Null;
///
/// assert_eq!(integer_value.as_integer_mut(), Some(&mut 42));
/// assert_eq!(non_integer_value.as_integer_mut(), None);
/// ```
pub fn as_integer_mut(&mut self) -> Option<&mut i64> {
match self {
JsonValue::Integer(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `mut f64` contained inside the node if it is the `JsonValue::Float` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let mut float_value = JsonValue::Float(3.14);
/// let mut non_float_value = JsonValue::Null;
///
/// assert_eq!(float_value.as_float_mut(), Some(&mut 3.14));
/// assert_eq!(non_float_value.as_float_mut(), None);
/// ```
pub fn as_float_mut(&mut self) -> Option<&mut f64> {
match self {
JsonValue::Float(value) => Some(value),
_ => None,
}
}
/// Extracts the inner `mut bool` contained inside the node if it is the `JsonValue::Boolean` discriminant.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let mut bool_value = JsonValue::Boolean(true);
/// let mut non_bool_value = JsonValue::Null;
///
/// assert_eq!(bool_value.as_boolean_mut(), Some(&mut true));
/// assert_eq!(non_bool_value.as_boolean_mut(), None);
/// ```
pub fn as_boolean_mut(&mut self) -> Option<&mut bool> {
match self {
JsonValue::Boolean(value) => Some(value),
_ => None,
}
}
/// Converts the `JsonValue` into a JSON representation of the value.
///
/// # Examples
///
/// ```
/// use json_node::JsonValue;
///
/// let string_value = JsonValue::String("Hello World!".to_owned());
///
/// assert_eq!(string_value.to_json_string(), "\"Hello World!\"");
/// ```
pub fn to_json_string(&self) -> String {
match self {
JsonValue::String(value) => format!("\"{}\"", value),
JsonValue::Integer(value) => value.to_string(),
JsonValue::Float(value) => value.to_string(),
JsonValue::Boolean(value) => value.to_string(),
JsonValue::Null => String::from("null"),
}
}
}
impl Display for JsonValue {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
JsonValue::String(value) => write!(f, "{}", value),
JsonValue::Integer(value) => write!(f, "{}", value),
JsonValue::Float(value) => write!(f, "{}", value),
JsonValue::Boolean(value) => write!(f, "{}", value),
JsonValue::Null => write!(f, "null"),
}
}
}