Add for loop

Signed-off-by: Marcel Müller <neikos@neikos.email>

src/value.rs

@@ -0,0 +1,251 @@
+use std::borrow::Cow;
+use std::collections::BTreeMap;
+
+#[cfg(feature = "serde_json")]
+use displaydoc::Display;
+use thiserror::Error;
+
+#[derive(Clone)]
+pub enum NomoValue {
+    String {
+        value: Cow<'static, str>,
+    },
+    Array {
+        value: Vec<NomoValue>,
+    },
+    Bool {
+        value: bool,
+    },
+    Object {
+        value: BTreeMap<String, NomoValue>,
+    },
+    Integer {
+        value: u64,
+    },
+    SignedInteger {
+        value: i64,
+    },
+    Float {
+        value: f64,
+    },
+    Iterator {
+        value: Box<dyn CloneIterator<Item = NomoValue>>,
+    },
+}
+
+impl NomoValue {
+    pub fn as_str(&self) -> Option<&str> {
+        if let Self::String { value } = self {
+            Some(value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_array(&self) -> Option<&[NomoValue]> {
+        if let Self::Array { value } = self {
+            Some(value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_bool(&self) -> Option<bool> {
+        if let Self::Bool { value } = self {
+            Some(*value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_object(&self) -> Option<&BTreeMap<String, NomoValue>> {
+        if let Self::Object { value } = self {
+            Some(value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_integer(&self) -> Option<u64> {
+        if let Self::Integer { value } = self {
+            Some(*value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_float(&self) -> Option<f64> {
+        if let Self::Float { value } = self {
+            Some(*value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_iterator(&self) -> Option<&dyn CloneIterator<Item = NomoValue>> {
+        if let Self::Iterator { value } = self {
+            Some(value)
+        } else {
+            None
+        }
+    }
+
+    pub fn as_iterator_mut(&mut self) -> Option<&mut dyn CloneIterator<Item = NomoValue>> {
+        if let Self::Iterator { value } = self {
+            Some(value)
+        } else {
+            None
+        }
+    }
+}
+
+pub trait CloneIterator: Iterator<Item = NomoValue> {
+    fn clone_box(&self) -> Box<dyn CloneIterator<Item = NomoValue>>;
+}
+
+impl<I> CloneIterator for I
+where
+    I: Iterator<Item = NomoValue> + Clone + 'static,
+{
+    fn clone_box(&self) -> Box<dyn CloneIterator<Item = NomoValue>> {
+        Box::new(Clone::clone(self))
+    }
+}
+
+impl Clone for Box<dyn CloneIterator> {
+    fn clone(&self) -> Self {
+        self.clone_box()
+    }
+}
+
+impl std::fmt::Debug for NomoValue {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::String { value } => f.debug_struct("String").field("value", value).finish(),
+            Self::Array { value } => f.debug_struct("Array").field("value", value).finish(),
+            Self::Bool { value } => f.debug_struct("Bool").field("value", value).finish(),
+            Self::Object { value } => f.debug_struct("Object").field("value", value).finish(),
+            Self::Integer { value } => f.debug_struct("Integer").field("value", value).finish(),
+            Self::SignedInteger { value } => f
+                .debug_struct("SignedInteger")
+                .field("value", value)
+                .finish(),
+            Self::Float { value } => f.debug_struct("Float").field("value", value).finish(),
+            Self::Iterator { value: _ } => f
+                .debug_struct("Iterator")
+                .field("value", &"Iterator")
+                .finish(),
+        }
+    }
+}
+
+impl<R> From<&R> for NomoValue
+where
+    R: Into<NomoValue> + Clone,
+{
+    fn from(value: &R) -> Self {
+        value.clone().into()
+    }
+}
+
+impl From<String> for NomoValue {
+    fn from(val: String) -> Self {
+        NomoValue::String {
+            value: Cow::Owned(val),
+        }
+    }
+}
+
+impl From<&'static str> for NomoValue {
+    fn from(val: &'static str) -> Self {
+        NomoValue::String {
+            value: Cow::Borrowed(val),
+        }
+    }
+}
+
+impl<V> From<Vec<V>> for NomoValue
+where
+    V: Into<NomoValue>,
+{
+    fn from(val: Vec<V>) -> Self {
+        NomoValue::Array {
+            value: val.into_iter().map(Into::into).collect(),
+        }
+    }
+}
+
+impl<V> From<std::collections::VecDeque<V>> for NomoValue
+where
+    V: Into<NomoValue>,
+{
+    fn from(val: std::collections::VecDeque<V>) -> Self {
+        NomoValue::Array {
+            value: val.into_iter().map(Into::into).collect(),
+        }
+    }
+}
+
+impl<V> From<&[V]> for NomoValue
+where
+    V: Into<NomoValue> + Clone,
+{
+    fn from(value: &[V]) -> Self {
+        NomoValue::Array {
+            value: value.iter().cloned().map(Into::into).collect(),
+        }
+    }
+}
+
+impl<K, V> From<std::collections::HashMap<K, V>> for NomoValue
+where
+    K: Into<String>,
+    V: Into<NomoValue>,
+{
+    fn from(val: std::collections::HashMap<K, V>) -> Self {
+        NomoValue::Object {
+            value: val.into_iter().map(|(k, v)| (k.into(), v.into())).collect(),
+        }
+    }
+}
+
+#[cfg(feature = "serde_json")]
+#[derive(Debug, Error, Display)]
+/// Could not transform value to [`NomoValue`]
+pub struct NomoValueError;
+
+#[cfg(feature = "serde_json")]
+impl TryFrom<serde_json::Value> for NomoValue {
+    type Error = NomoValueError;
+    fn try_from(value: serde_json::Value) -> Result<Self, NomoValueError> {
+        match value {
+            serde_json::Value::Null => todo!(),
+            serde_json::Value::Bool(value) => Ok(NomoValue::Bool { value }),
+            serde_json::Value::Number(number) => {
+                if let Some(value) = number.as_u64() {
+                    return Ok(NomoValue::Integer { value });
+                }
+
+                if let Some(value) = number.as_f64() {
+                    return Ok(NomoValue::Float { value });
+                }
+
+                if let Some(value) = number.as_i64() {
+                    return Ok(NomoValue::SignedInteger { value });
+                }
+
+                Err(NomoValueError)
+            }
+            serde_json::Value::String(str) => Ok(NomoValue::String {
+                value: Cow::Owned(str),
+            }),
+            serde_json::Value::Array(values) => Ok(NomoValue::Array {
+                value: values
+                    .into_iter()
+                    .map(TryInto::try_into)
+                    .collect::<Result<_, _>>()?,
+            }),
+            serde_json::Value::Object(_map) => todo!(),
+        }
+    }
+}