Support joining channels.

1 files changed, 27 insertions, 1 deletions

diff --git a/src/channel/repo.rs b/src/channel/repo.rs
index bb39d6e..a255305 100644
--- a/src/channel/repo.rs
+++ b/src/channel/repo.rs
@@ -62,7 +62,7 @@ impl<'c> Channels<'c> {
         Ok(())
     }
 
-    pub async fn for_login(&mut self, login: &LoginId) -> Result<Vec<Channel>, BoxedError> {
+    pub async fn joined(&mut self, login: &LoginId) -> Result<Vec<Channel>, BoxedError> {
         let channels = sqlx::query_as!(
             Channel,
             r#"
@@ -83,6 +83,32 @@ impl<'c> Channels<'c> {
         Ok(channels)
     }
 
+    pub async fn unjoined(&mut self, login: &LoginId) -> Result<Vec<Channel>, BoxedError> {
+        let channels = sqlx::query_as!(
+            Channel,
+            r#"
+                select
+                    channel.id as "id: Id",
+                    channel.name
+                from channel
+                except
+                select
+                    channel.id as "id: Id",
+                    channel.name
+                from channel
+                join channel_member
+                    on (channel.id = channel_member.channel)
+                where channel_member.login = $1
+                order by channel.name
+            "#,
+            login,
+        )
+        .fetch_all(&mut *self.0)
+        .await?;
+
+        Ok(channels)
+    }
+
     /// Unenrol a login from a channel.
     pub async fn leave(&mut self, channel: &Id, login: &LoginId) -> Result<(), BoxedError> {
         sqlx::query_scalar!(