Adding metric support

Cargo.lock

@@ -1549,6 +1549,27 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prometheus"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "449811d15fbdf5ceb5c1144416066429cf82316e2ec8ce0c1f6f8a02e7bbcf8c"
+dependencies = [
+ "cfg-if",
+ "fnv",
+ "lazy_static",
+ "memchr",
+ "parking_lot 0.12.1",
+ "protobuf",
+ "thiserror",
+]
+
+[[package]]
+name = "protobuf"
+version = "2.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
+
 [[package]]
 name = "quote"
 version = "1.0.29"
@@ -2137,6 +2158,7 @@ dependencies = [
  "lazy_static",
  "log",
  "poise",
+ "prometheus",
  "regex",
  "reqwest",
  "serde",

Cargo.toml

@@ -20,6 +20,7 @@ serde_json = "1.0"
 dashmap = "5.3"
 serde = "1.0"
 dotenv = "0.15.0"
+prometheus = { version = "0.13.3", optional = true }
 
 [patch."https://github.com/serenity-rs/serenity"]
 serenity = { version = "0.11.6" }

src/cmds/play.rs

@@ -5,6 +5,8 @@ use poise::serenity_prelude::{
     ReactionType,
 };
 
+#[cfg(feature = "prometheus")]
+use crate::metrics::PLAY_COUNTER;
 use crate::{
     cmds::autocomplete_sound,
     models::{guild_data::CtxGuildData, sound::SoundCtx},
@@ -27,6 +29,9 @@ pub async fn play(
 
     let guild = ctx.guild().unwrap();
 
+    #[cfg(feature = "prometheus")]
+    PLAY_COUNTER.inc();
+
     ctx.say(
         play_from_query(
             &ctx.serenity_context(),

src/event_handlers.rs

@@ -107,8 +107,7 @@ pub async fn listener(ctx: &Context, event: &poise::Event<'_>, data: &Data) -> R
                                     "
                                     SELECT name, id, public, server_id, uploader_id
                                         FROM sounds
-    WHERE id = ?
+                                        WHERE id = ?",
-                                        ",
                                     join_id
                                 )
                                 .fetch_one(&data.database)

src/main.rs

@@ -5,6 +5,8 @@ mod cmds;
 mod consts;
 mod error;
 mod event_handlers;
+#[cfg(feature = "prometheus")]
+mod metrics;
 mod models;
 mod utils;
 

src/metrics.rs

@@ -0,0 +1,7 @@
+use lazy_static;
+use prometheus::{register_int_counter, IntCounter};
+
+lazy_static! {
+    pub static ref PLAY_COUNTER: IntCounter =
+        register_int_counter!("play", "Number of calls to /play").unwrap();
+}