element: Add conversions from/to ScanElement

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

src/element.rs

@@ -38,6 +38,7 @@
 use std::fmt::Debug;
 use std::marker::PhantomData;
 use std::ops::Deref;
+use std::str::FromStr;
 
 use crate::parsers::parse_variable;
 use crate::types::{Client, Context, Entity, VariableAttr};
@@ -206,6 +207,75 @@ impl Deref for ScanElement {
 	}
 }
 
+impl From<ScanElement> for String {
+	fn from(scan: ScanElement) -> String {
+		String::from(&scan.elem)
+	}
+}
+
+impl From<&ScanElement> for String {
+	fn from(scan: &ScanElement) -> String {
+		String::from(&scan.elem)
+	}
+}
+
+impl From<Element> for ScanElement {
+	fn from(elem: Element) -> ScanElement {
+		ScanElement::new(elem)
+	}
+}
+
+impl From<Iq> for ScanElement {
+	fn from(elem: Iq) -> ScanElement {
+		ScanElement::new(elem.into())
+	}
+}
+
+impl TryFrom<ScanElement> for Iq {
+	type Error = XMPPParserError;
+
+	fn try_from(scan: ScanElement) -> Result<Iq, Self::Error> {
+		scan.elem.try_into()
+	}
+}
+
+impl From<Message> for ScanElement {
+	fn from(elem: Message) -> ScanElement {
+		ScanElement::new(elem.into())
+	}
+}
+
+impl TryFrom<ScanElement> for Message {
+	type Error = XMPPParserError;
+
+	fn try_from(scan: ScanElement) -> Result<Message, Self::Error> {
+		scan.elem.try_into()
+	}
+}
+
+impl From<Presence> for ScanElement {
+	fn from(elem: Presence) -> ScanElement {
+		ScanElement::new(elem.into())
+	}
+}
+
+impl TryFrom<ScanElement> for Presence {
+	type Error = XMPPParserError;
+
+	fn try_from(scan: ScanElement) -> Result<Presence, Self::Error> {
+		scan.elem.try_into()
+	}
+}
+
+impl FromStr for ScanElement {
+	type Err = MinidomError;
+
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		let elem = s.parse::<Element>()?;
+		Ok(ScanElement::new(elem))
+	}
+}
+
 fn apply_context(mut elem: Element, context: &Context) -> Element {
 	// Parse variables in attributes.
 	for (_attr, val) in elem.attrs_mut() {