add custom role management

src/commands/self_roles/mod.rs

@@ -0,0 +1,37 @@
+
+use crate::common::{Context, Error};
+use sqlx::{PgConnection, Row};
+use poise::serenity_prelude::{RoleId, UserId, GuildId};
+
+mod register;
+mod whois;
+mod color;
+mod name;
+mod disown;
+
+#[poise::command(
+    prefix_command,
+    slash_command,
+    subcommands(
+        "register::register",
+        "whois::whois",
+        "color::color",
+        "name::name",
+        "disown::disown",
+    )
+)]
+pub async fn role(_ctx: Context<'_>) -> Result<(), Error> {
+    Ok(())
+}
+
+pub async fn get_user_role(_ctx: Context<'_>, user: UserId, guild: GuildId, db: &mut PgConnection) -> Result<Option<RoleId>, Error> {
+    match sqlx::query("SELECT roleid FROM selfroles WHERE userid = $1 AND guildid = $2")
+        .bind(user.get() as i64)
+        .bind(guild.get() as i64)
+        .fetch_one(db).await
+    {
+        Ok(row) => Ok(Some(RoleId::new(row.try_get::<i64, usize>(0)? as u64))),
+        Err(sqlx::Error::RowNotFound) => Ok(None),
+        Err(e) => return Err(Box::new(e)),
+    }
+}