implement Titan protocol features

src/client/connection/request/gemini.rs

@@ -0,0 +1,22 @@
+use glib::{Bytes, Uri};
+
+/// [Gemini](https://geminiprotocol.net/docs/protocol-specification.gmi) protocol enum object for `Request`
+pub struct Gemini {
+    pub uri: Uri,
+}
+
+impl Gemini {
+    // Constructors
+
+    /// Build valid new `Self`
+    pub fn build(uri: Uri) -> Self {
+        Self { uri } // @TODO validate
+    }
+
+    // Getters
+
+    /// Copy `Self` to [Bytes](https://docs.gtk.org/glib/struct.Bytes.html)
+    pub fn to_bytes(&self) -> Bytes {
+        Bytes::from(format!("{}\r\n", self.uri).as_bytes())
+    }
+}

src/client/connection/request/titan.rs

@@ -0,0 +1,53 @@
+use glib::{Bytes, Uri};
+
+/// [Titan](gemini://transjovian.org/titan/page/The%20Titan%20Specification) protocol enum object for `Request`
+pub struct Titan {
+    pub uri: Uri,
+    pub size: usize,
+    pub mime: String,
+    pub token: Option<String>,
+    pub data: Vec<u8>,
+}
+
+impl Titan {
+    // Constructors
+
+    /// Build valid new `Self`
+    pub fn build(
+        uri: Uri,
+        size: usize,
+        mime: String,
+        token: Option<String>,
+        data: Vec<u8>,
+    ) -> Self {
+        Self {
+            uri,
+            size,
+            mime,
+            token,
+            data,
+        } // @TODO validate
+    }
+
+    // Getters
+
+    /// Copy `Self` to [Bytes](https://docs.gtk.org/glib/struct.Bytes.html)
+    pub fn to_bytes(&self) -> Bytes {
+        // Build header
+        let mut header = format!("{};size={};mime={}", self.uri, self.size, self.mime);
+        if let Some(ref token) = self.token {
+            header.push_str(&format!(";token={token}"));
+        }
+        header.push_str("\r\n");
+
+        let header_bytes = header.into_bytes();
+
+        // Build request
+        let mut bytes: Vec<u8> = Vec::with_capacity(self.size + header_bytes.len());
+        bytes.extend(header_bytes);
+        bytes.extend(&self.data);
+
+        // Wrap result
+        Bytes::from(&bytes)
+    }
+}