refactor: reorganize structsHEADmaster

1 files changed, 66 insertions, 0 deletions

diff --git a/src/emphasis.rs b/src/emphasis.rs
new file mode 100644
index 0000000..12502ad
--- /dev/null
+++ b/src/emphasis.rs
@@ -0,0 +1,66 @@
+//! Emphasis.
+use crate::xml::element::Tagged;
+
+/// Emphasis.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Emphasis
+{
+    /// The emphasised text.
+    pub text: String,
+
+    /// Emphasis role.
+    pub role: Role,
+}
+
+impl Emphasis
+{
+    pub(crate) fn from_tagged_element(tagged_element: &Tagged) -> Result<Self, Error>
+    {
+        return Ok(Emphasis {
+            text: tagged_element
+                .child_elements()
+                .get_first_text_element()
+                .cloned()
+                .unwrap_or_default(),
+            role: tagged_element
+                .attributes()
+                .iter()
+                .find(|attr| attr.key == "role")
+                .map(|attr| {
+                    let value = String::from_utf8(attr.value.clone())
+                        .map_err(|_| Error::EmphasisRoleNotUTF8)?;
+
+                    if value == "bold" {
+                        return Ok(Role::Bold);
+                    }
+
+                    Err(Error::UnknownEmphasisRole(value))
+                })
+                .unwrap_or(Ok(Role::None))?,
+        });
+    }
+}
+
+/// [`Emphasis`] error.
+#[derive(Debug, thiserror::Error)]
+pub enum Error
+{
+    /// Emphasis role is not valid UTF-8.
+    #[error("Emphasis role is not valid UTF-8")]
+    EmphasisRoleNotUTF8,
+
+    /// Unknown emphasis role.
+    #[error("Unknown emphasis role '{0}'")]
+    UnknownEmphasisRole(String),
+}
+
+/// Emphasis role.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Role
+{
+    /// Bold.
+    Bold,
+
+    /// None.
+    None,
+}