♻️ Major code restructuring

src/html/assets/stylesheet.rs

@@ -0,0 +1,73 @@
+use crate::html::assets::AssetsTrait;
+use crate::html::{html, Markup};
+use crate::{SmartDefault, Weight};
+
+pub enum TargetMedia {
+    Default,
+    Print,
+    Screen,
+    Speech,
+}
+
+#[rustfmt::skip]
+#[derive(SmartDefault)]
+pub struct StyleSheet {
+    path   : String,
+    prefix : &'static str,
+    version: &'static str,
+    media  : Option<&'static str>,
+    weight : Weight,
+}
+
+impl AssetsTrait for StyleSheet {
+    fn path(&self) -> &str {
+        self.path.as_str()
+    }
+
+    fn weight(&self) -> Weight {
+        self.weight
+    }
+
+    fn prepare(&self) -> Markup {
+        html! {
+            link
+                rel="stylesheet"
+                href=(crate::concat_string!(self.path, self.prefix, self.version))
+                media=[self.media];
+        }
+    }
+}
+
+impl StyleSheet {
+    pub fn at(path: impl Into<String>) -> Self {
+        StyleSheet {
+            path: path.into(),
+            ..Default::default()
+        }
+    }
+
+    pub fn with_version(mut self, version: &'static str) -> Self {
+        (self.prefix, self.version) = if version.is_empty() {
+            ("", "")
+        } else {
+            ("?v=", version)
+        };
+        self
+    }
+
+    pub fn with_weight(mut self, value: Weight) -> Self {
+        self.weight = value;
+        self
+    }
+
+    #[rustfmt::skip]
+    pub fn for_media(mut self, media: TargetMedia) -> Self {
+        self.media = match media {
+            TargetMedia::Print  => Some("print"),
+            TargetMedia::Screen => Some("screen"),
+            TargetMedia::Speech => Some("speech"),
+            _ => None,
+        };
+        self
+    }
+}