YEEEAS

Cargo.lock

@@ -312,6 +312,8 @@ dependencies = [
  "poise",
  "pretty_env_logger",
  "rand",
+ "serde",
+ "serde_json",
  "tokio",
 ]
 

Cargo.toml

@@ -11,4 +11,6 @@ log = "0.4.21"
 poise = "0.6.1"
 pretty_env_logger = "0.5.0"
 tokio = { version = "1.0", features = ["macros", "rt-multi-thread"] }
-rand = "0.8.5"
+rand = "0.8.5"
+serde = { version = "1.0.198", features = ["serde_derive"] }
+serde_json = "1.0.116"

settings.json

@@ -0,0 +1 @@
+{"channels":[1232064459737010247]}

src/command/util.rs

@@ -27,3 +27,33 @@ pub async fn info(ctx: Context<'_>) -> Result<(), Error> {
     info!("Executed command `info` successfully");
     Ok(())
 }
+
+/// Add information to the shared settings
+#[poise::command(slash_command)]
+pub async fn add_channel(
+    ctx: Context<'_>,
+    #[description = "Selected channel"] channel: Option<serenity::Channel>,
+) -> Result<(), Error> {
+    if let Some(channel_ok) = channel {
+        let config = &mut ctx.data().config_manager.lock().await;
+        let channel_id = {
+            u64::from(channel_ok.id())
+        };
+        config.channels.push(channel_id);
+        config.store().unwrap();
+        ctx.say(format!("Successfully added <#{}> to the channel registry.", channel_id)).await?;
+        info!("Executed command `add_channel` successfully");
+    } else {
+        ctx.say("Channel with supplied ID was not found.").await?;
+        error!("Failed to execute command `add_channel`.");
+    }
+    Ok(())
+}
+
+#[poise::command(slash_command)]
+pub async fn list_channels(ctx: Context<'_>) -> Result<(), Error> {
+    let config = &mut ctx.data().config_manager.lock().await;
+    ctx.say(format!("Current channel IDs in registry: {:#?}", config.channels)).await?;
+    info!("Executed command `list_channels` successfully");
+    Ok(())
+}

src/main.rs

@@ -1,3 +1,7 @@
+
+use std::sync::{Arc};
+use tokio::sync::Mutex;
+
 use dotenv::dotenv;
 
 use poise::serenity_prelude as serenity;
@@ -6,13 +10,24 @@ extern crate pretty_env_logger;
 #[macro_use]
 extern crate log;
 
-mod command;
-use crate::command::{fun::*, util::*};
+use serde::*;
 
-struct Data {} // User data, which is stored and accessible in all command invocations
+mod command;
+use crate::{command::{fun::*, util::*}, settings::SettingsManager};
+
+mod settings;
+
+struct Data {
+    config_manager: Arc<Mutex<SettingsManager<Settings>>>
+} // User data, which is stored and accessible in all command invocations
 type Error = Box<dyn std::error::Error + Send + Sync>;
 type Context<'a> = poise::Context<'a, Data, Error>;
 
+#[derive(Debug, Serialize, Deserialize)]
+struct Settings {
+    channels: Vec<u64>,
+}
+
 #[tokio::main]
 async fn main() {
     // Get secure env vars from .env file
@@ -25,16 +40,21 @@ async fn main() {
     // Initialize logging
     pretty_env_logger::init();
 
+    // Configure persistent options
+    let config = Settings { channels: vec![] };
+    let config_manager = Arc::new(Mutex::new(SettingsManager::manage("settings.json", config)));
+    config_manager.lock().await.update();
+
     // Set up framework
     let framework = poise::Framework::builder()
         .options(poise::FrameworkOptions {
-            commands: vec![age(), info(), bleat()],
+            commands: vec![age(), info(), bleat(), add_channel(), list_channels()],
             ..Default::default()
         })
         .setup(|ctx, _ready, framework| {
             Box::pin(async move {
                 poise::builtins::register_globally(ctx, &framework.options().commands).await?;
-                Ok(Data {})
+                Ok(Data {config_manager})
             })
         })
         .build();

src/settings.rs

@@ -0,0 +1,66 @@
+#![allow(dead_code)]
+
+use std::io::{Read, Write};
+use std::ops::{Deref, DerefMut};
+
+use serde::de::Deserialize;
+use serde::ser::Serialize;
+
+/// A utility structure to manage a settings structure.
+pub struct SettingsManager<T: Serialize + for<'a> Deserialize<'a>> {
+    internal: T,
+    path: String,
+}
+
+impl<T: Serialize + for<'a> Deserialize<'a>> SettingsManager<T> {
+    /// Instantiate new self if the path contains a valid serialization of
+    /// the settings structure.
+    pub fn load(path: &str) -> Option<Self> {
+        let mut file = std::fs::File::open(path).ok()?;
+        let mut data = String::new();
+        file.read_to_string(&mut data).ok()?;
+        let settings = serde_json::from_str(&data).ok()?;
+        Some(Self {
+            internal: settings,
+            path: String::from(path),
+        })
+    }
+    /// Update the data stored in the settings.
+    pub fn update(&mut self) -> Option<()> {
+        let mut file = std::fs::File::open(self.path.clone()).ok()?;
+        let mut data = String::new();
+        file.read_to_string(&mut data).ok()?;
+        self.internal = serde_json::from_str(&data).ok()?;
+        Some(())
+    }
+    /// Serialize settings structure to the stored path. Returns None if
+    /// unsuccessful.
+    pub fn store(&self) -> Option<()> {
+        let data = serde_json::to_string(&self.internal).ok()?;
+        let mut file = std::fs::File::create(&self.path).ok()?;
+        let _ = file.write(data.as_bytes());
+        Some(())
+    }
+    /// Create a new manager, passing in the path, and a structure to manage.
+    /// We cannot initialize a settings manager without fully initialized settings.
+    pub fn manage(path: &str, intake: T) -> Self {
+        Self {
+            internal: intake,
+            path: path.to_string(),
+        }
+    }
+}
+
+impl<T: Serialize + for<'a> Deserialize<'a>> Deref for SettingsManager<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.internal
+    }
+}
+
+impl<T: Serialize + for<'a> Deserialize<'a>> DerefMut for SettingsManager<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.internal
+    }
+}