1 files changed, 87 insertions, 2 deletions
diff --git a/sdp/src/lib.rs b/sdp/src/lib.rs
index 68c3c70..15b4ce2 100644
--- a/sdp/src/lib.rs
+++ b/sdp/src/lib.rs
@@ -1,5 +1,5 @@
 use anyhow::{anyhow, bail};
-use std::str::FromStr;
+use std::{fmt::Display, str::FromStr};
 
 pub struct SessionDescription {
     pub version: String,
@@ -72,7 +72,7 @@ impl FromStr for SessionDescription {
                 "m" => media_descriptions.push(MediaDescription {
                     connection_information: None,
                     name: value.to_string(),
-                    title: None,
+                    title: None, // TODO never set, forgot it somewhere
                     encryption_key: None,
                     attributes: Vec::new(),
                     bandwidth: Vec::new(),
@@ -126,3 +126,88 @@ impl FromStr for SessionDescription {
         })
     }
 }
+
+impl Display for SessionDescription {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let Self {
+            attributes,
+            bandwidth,
+            connection_information,
+            description_uri,
+            email_address,
+            encryption_key,
+            media_descriptions,
+            originator,
+            phone_number,
+            session_information,
+            session_name,
+            time_descriptions,
+            time_zone_adjustments,
+            version,
+        } = self;
+        writeln!(f, "v={version}")?;
+        writeln!(f, "o={originator}")?;
+        writeln!(f, "s={session_name}")?;
+        // TODO check order
+        if let Some(session_information) = session_information {
+            writeln!(f, "i={session_information}")?;
+        }
+        if let Some(description_uri) = description_uri {
+            writeln!(f, "u={description_uri}")?;
+        }
+        if let Some(email_address) = email_address {
+            writeln!(f, "e={email_address}")?;
+        }
+        if let Some(phone_number) = phone_number {
+            writeln!(f, "p={phone_number}")?;
+        }
+        for TimeDescription { time, repeat_times } in time_descriptions {
+            writeln!(f, "t={time}")?;
+            for repeat_time in repeat_times {
+                writeln!(f, "r={repeat_time}")?;
+            }
+        }
+        if let Some(encryption_key) = encryption_key {
+            writeln!(f, "k={encryption_key}")?;
+        }
+        if let Some(time_zone_adjustments) = time_zone_adjustments {
+            writeln!(f, "z={time_zone_adjustments}")?;
+        }
+        if let Some(connection_information) = connection_information {
+            writeln!(f, "c={connection_information}")?;
+        }
+        for bandwidth in bandwidth {
+            writeln!(f, "b={bandwidth}")?;
+        }
+        for attribute in attributes {
+            writeln!(f, "a={attribute}")?;
+        }
+        for MediaDescription {
+            name,
+            title,
+            connection_information,
+            bandwidth,
+            encryption_key,
+            attributes,
+        } in media_descriptions
+        {
+            writeln!(f, "m={name}")?;
+            if let Some(title) = title {
+                writeln!(f, "t={title}")?; // TODO was offline, check param name
+            }
+            if let Some(connection_information) = connection_information {
+                writeln!(f, "c={connection_information}")?;
+            }
+            for bandwidth in bandwidth {
+                writeln!(f, "b={bandwidth}")?;
+            }
+            if let Some(encryption_key) = encryption_key {
+                writeln!(f, "k={encryption_key}")?;
+            }
+            for attribute in attributes {
+                writeln!(f, "a={attribute}")?;
+            }
+        }
+        Ok(())
+    }
+}