add basic guild create + message create endpoints

chat/src/db/channel.rs

@@ -0,0 +1,47 @@
+use eyre::Result;
+use foxchat::FoxError;
+use sqlx::PgExecutor;
+use ulid::Ulid;
+
+pub struct Channel {
+    pub id: String,
+    pub guild_id: String,
+    pub name: String,
+    pub topic: Option<String>,
+}
+
+pub async fn create_channel(
+    executor: impl PgExecutor<'_>,
+    guild_id: &str,
+    name: &str,
+    topic: Option<String>,
+) -> Result<Channel> {
+    let channel = sqlx::query_as!(
+        Channel,
+        "insert into channels (id, guild_id, name, topic) values ($1, $2, $3, $4) returning *",
+        Ulid::new().to_string(),
+        guild_id,
+        name,
+        topic
+    )
+    .fetch_one(executor)
+    .await?;
+
+    Ok(channel)
+}
+
+pub async fn get_channel(executor: impl PgExecutor<'_>, channel_id: &str) -> Result<Channel, FoxError> {
+    let channel = sqlx::query_as!(Channel, "select * from channels where id = $1", channel_id)
+        .fetch_one(executor)
+        .await
+        .map_err(|e| match e {
+            sqlx::Error::RowNotFound => FoxError::NotInGuild,
+            _ => {
+                tracing::error!("database error: {}", e);
+
+                return FoxError::DatabaseError;
+            }
+        })?;
+
+    Ok(channel)
+}