filter: Initial message filter implementation

Also a custom error type, tracing_subscriber, and unsafe impls

2 files changed, 83 insertions, 0 deletions

diff --git a/src/commands/filters.rs b/src/commands/filters.rs
new file mode 100644
index 0000000..35fefac
--- /dev/null
+++ b/src/commands/filters.rs
@@ -0,0 +1,82 @@
+use crate::{Context, Error, models::{FilterAction, MessageFilter}};
+use poise::{serenity_prelude as serenity, AutocompleteChoice};
+
+use std::str::FromStr;
+
+use futures::{Stream, StreamExt};
+
+/// Base command for all filter actions
+///
+/// Provides a CRUD interface for managing automatic message filters
+#[poise::command(slash_command, prefix_command)]
+pub async fn filter(ctx: Context<'_>) -> Result<(), Error> {
+    Ok(())
+}
+
+/// Lists message filters
+///
+/// Usage:
+///     filter list
+#[poise::command(slash_command, ephemeral, prefix_command)]
+pub async fn list(ctx: Context<'_>) -> Result<(), Error> {
+    let pool = ctx.data().pg.lock().unwrap().clone();
+
+    let filters = sqlx::query_as::<_, MessageFilter>("SELECT * FROM message_filter WHERE guild_id=$1").bind(ctx.guild().unwrap().id.0.to_string())
+        .fetch_all(&pool).await?;
+
+    let mut list = String::from("");
+    if filters.len() == 0 {
+        list = "No filters set, try adding one with `/filter add`!".to_string();
+    } else {
+    for f in filters {
+        list.push_str(&format!("{}\n", f.to_string()));
+    }
+    }
+
+    ctx.send(|m| {
+        m.embed(|e| {
+            e.title("Message Filter List");
+            e.description(list);
+            e
+        })
+    }).await?;
+    Ok(())
+}
+
+/// Creates a new message filter
+///
+/// Usage:
+///     filter add <pattern> <action>
+///
+/// Where <action> is one of "review" or "delete"
+#[poise::command(slash_command, ephemeral, prefix_command)]
+pub async fn add(ctx: Context<'_>,
+                 #[description = "The regular expression to match against"]
+                 regex: String,
+                 #[description = "The action to take when the expression is matched"]
+                 #[autocomplete = "ac_action"]
+                 action: String,
+                 ) -> Result<(), Error> {
+
+    let pool = ctx.data().pg.lock().unwrap().clone();
+
+    let action = FilterAction::from_str(&action)?;
+
+    sqlx::query("INSERT INTO message_filter (pattern, action, guild_id) VALUES ($1, $2, $3)")
+        .bind(regex)
+        .bind(action as FilterAction)
+        .bind(ctx.guild().unwrap().id.0.to_string())
+        .execute(&pool)
+        .await?;
+
+    ctx.say("Sounds good! I've written that down and will keep a close eye out").await?;
+
+    Ok(())
+}
+
+
+async fn ac_action(_ctx: Context<'_>, partial: String) -> impl Stream<Item = String> {
+    futures::stream::iter(&["review", "delete"])
+        .filter(move |name| futures::future::ready(name.starts_with(&partial)))
+        .map(|name| name.to_string())
+}
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index 3ffb136..2ce5d6a 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -3,3 +3,4 @@ pub mod meta;
 pub mod osu;
 pub mod pony;
 pub mod reactionroles;
+pub mod filters;