feat: add a channel as a logging channel

Closes #1, fixes #10

migrations/20231122220824_guild_log_channels.sql

@@ -1,6 +1,13 @@
 -- Add migration script here
+
+-- Discord IDs are kept as INTEGERs and not unsigned INTEGERs despite
+-- their Rust type being u64. In order to properly manage them, you'll
+-- need to cast any u64 to i64 with `as i64` before writing them to
+-- the database, and cast any i64 to u64 with `as u64` when reading
+-- them from the database. This operation is noop in Rust and should
+-- therefore not cost a single CPU cycle.
 CREATE TABLE IF NOT EXISTS guild_log_channels (
-       guild_id TEXT PRIMARY KEY,
-       channel_id TEXT NOT NULL,
+       guild_id INTEGER PRIMARY KEY,
+       channel_id INTEGER NOT NULL,
        UNIQUE(guild_id, channel_id)
 );

src/db.rs

@@ -1,59 +0,0 @@
-use std::env;
-
-use sqlx::SqlitePool;
-
-pub struct Database {
-    pool: SqlitePool,
-}
-
-impl Database {
-    pub async fn new() -> color_eyre::Result<Self> {
-        Ok(Self {
-            pool: SqlitePool::connect(&env::var("DATABASE_URL")?).await?,
-        })
-    }
-
-    pub async fn get_logging_channel(
-        &self,
-        guild_id: u64,
-    ) -> color_eyre::Result<Vec<u64>> {
-        let guild_str = guild_id.to_string();
-        let channels = sqlx::query!(
-            r#"
-SELECT channel_id
-FROM guild_log_channels
-WHERE guild_id = ?1
-            "#,
-            guild_str
-        )
-        .fetch_all(&self.pool)
-        .await?;
-        Ok(channels
-            .iter()
-            .map(|id| id.channel_id.parse::<u64>().unwrap())
-            .collect())
-    }
-
-    pub async fn set_logging_channel(
-        &self,
-        guild_id: u64,
-        channel_id: u64,
-    ) -> color_eyre::Result<()> {
-        let guild_str = guild_id.to_string();
-        let channel_str = channel_id.to_string();
-        let mut conn = self.pool.acquire().await?;
-
-        sqlx::query!(
-            r#"
-INSERT INTO guild_log_channels (guild_id, channel_id)
-VALUES ( ?1, ?2 )
-            "#,
-            guild_str,
-            channel_str
-        )
-        .execute(&mut *conn)
-        .await?
-        .last_insert_rowid();
-        Ok(())
-    }
-}

src/db/mod.rs

@@ -0,0 +1,62 @@
+use std::env;
+
+use poise::serenity_prelude::{ChannelId, GuildId};
+use sqlx::SqlitePool;
+
+pub type Result<T> = ::std::result::Result<T, sqlx::Error>;
+
+pub struct Database {
+    pool: SqlitePool,
+}
+
+impl Database {
+    pub async fn new() -> Result<Self> {
+        Ok(Self {
+            pool: SqlitePool::connect(
+                &env::var("DATABASE_URL")
+                    .expect("Missing enviroment variable DATABASE_URL"),
+            )
+            .await?,
+        })
+    }
+
+    pub async fn get_logging_channel(
+        &self,
+        guild_id: u64,
+    ) -> Result<Vec<u64>> {
+        let guild_id = guild_id as i64;
+        let channels = sqlx::query!(
+            r#"
+SELECT channel_id
+FROM guild_log_channels
+WHERE guild_id = ?1
+            "#,
+            guild_id
+        )
+        .fetch_all(&self.pool)
+        .await?;
+        Ok(channels.iter().map(|id| id.channel_id as u64).collect())
+    }
+
+    pub async fn set_logging_channel(
+        &self,
+        guild_id: GuildId,
+        channel_id: ChannelId,
+    ) -> Result<()> {
+        let guild_id = guild_id.0 as i64;
+        let channel_id = channel_id.0 as i64;
+        let mut conn = self.pool.acquire().await?;
+
+        sqlx::query!(
+            r#"
+INSERT INTO guild_log_channels (guild_id, channel_id)
+VALUES ( ?1, ?2 )
+            "#,
+            guild_id,
+            channel_id
+        )
+        .execute(&mut *conn)
+        .await
+        .map(|_| ())
+    }
+}

src/discord/commands.rs

@@ -2,16 +2,47 @@ use super::{Context, Error};
 
 use super::utils::serenity;
 
-#[poise::command(slash_command)]
-pub async fn add_logging_channel(
+#[poise::command(
+    slash_command,
+    subcommands("add_channel"),
+    required_permissions = "ADMINISTRATOR"
+)]
+pub async fn logging(_ctx: Context<'_>, _arg: String) -> Result<(), Error> {
+    Ok(())
+}
+
+#[poise::command(slash_command, aliases("add-channel"))]
+pub async fn add_channel(
     ctx: Context<'_>,
-    #[description = "Selected channel"] channel: Option<serenity::Channel>,
+    #[description = "New logging channel"] channel: serenity::Channel,
 ) -> Result<(), Error> {
-    let response = match channel {
-        None => "No channel selected. Please select one.".to_owned(),
-        Some(chan) => {
-            let channel_id = chan.id();
-            format!("Selected channel <#{channel_id}>")
+    let channel_id = channel.id();
+    let response = match ctx.guild_id() {
+        None => "Error: Could not determine the guild's ID.".to_owned(),
+        Some(guild_id) => {
+            match ctx
+                .data()
+                .database
+                .set_logging_channel(guild_id, channel_id)
+                .await
+            {
+                Ok(_) => format!(
+                    "Added channel <#{channel_id}> as a logging channel"
+                ),
+                Err(e) => {
+                    if let Some(db_error) = e.as_database_error() {
+                        if db_error.is_unique_violation() {
+                            format!("Channel <#{channel_id}> is already a logging channel")
+                        } else {
+                            format!("Error: {:?}", e)
+                        }
+                    } else {
+                        format!(
+                            "Something bad happened with the database: {e:?}"
+                        )
+                    }
+                }
+            }
         }
     };
     ctx.say(response).await?;

src/discord/mod.rs

@@ -5,14 +5,14 @@ pub mod utils;
 use poise::FrameworkBuilder;
 use utils::serenity;
 
-use commands::add_logging_channel;
+use commands::logging;
 use utils::{BotData, Context, Error};
 
 pub async fn make_bot() -> color_eyre::Result<FrameworkBuilder<BotData, Error>>
 {
     let framework = poise::Framework::builder()
         .options(poise::FrameworkOptions {
-            commands: vec![add_logging_channel()],
+            commands: vec![logging()],
             ..Default::default()
         })
         .token(std::env::var("DISCORD_TOKEN").expect("missing DISCORD_TOKEN"))

src/discord/utils.rs

@@ -2,7 +2,7 @@ use crate::db::Database;
 
 pub use poise::serenity_prelude as serenity;
 pub struct BotData {
-    database: Database,
+    pub database: Database,
 }
 
 impl BotData {

src/utils.rs

@@ -3,7 +3,7 @@ use tracing_subscriber::FmtSubscriber;
 
 pub fn setup_logging() {
     let subscriber = FmtSubscriber::builder()
-        .with_max_level(Level::DEBUG)
+        .with_max_level(Level::INFO)
         .finish();
     tracing::subscriber::set_global_default(subscriber)
         .expect("Setting default subscriber failed");