feat: add sql drivers with sqlx

had to compromise on a lot of stuff because sqlx 0.7+ broke the AnyDb
driver, but ehhh it works

Cargo.toml

@@ -6,24 +6,34 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-async-trait = "0.1.73"
-axum = "0.6.20"
-clap = { version = "4.4.6", features = ["derive"] }
-html-escape = "0.2.13"
-lazy_static = "1.4.0"
-serde = { version = "1.0.189", features = ["derive"] }
-serde_json = "1.0.107"
-tokio = { version = "1.33.0", features = ["macros", "rt-multi-thread"] }
+# core
 tracing = "0.1.39"
 tracing-subscriber = "0.3.17"
 thiserror = "1.0.51"
-chrono = { version = "0.4.31", features = ["serde"] }
-uuid = { version = "1.6.1", features = ["v4", "fast-rng"] }
 md-5 = "0.10.6"
-# telegram provider
-teloxide = { version = "0.12.2", features = ["macros"], optional = true }
 toml = "0.8.8"
+uuid = { version = "1.6.1", features = ["v4", "fast-rng"] }
+chrono = { version = "0.4.31", features = ["serde"] }
+serde = { version = "1.0.189", features = ["derive"] }
+serde_json = "1.0.107"
+async-trait = "0.1.73"
+html-escape = "0.2.13"
+clap = { version = "4.4.6", features = ["derive"] }
+tokio = { version = "1.33.0", features = ["macros", "rt-multi-thread"] }
+axum = "0.6.20"
+# db providers
+sqlx = { version = "0.7.3", features = ["runtime-tokio", "tls-rustls", "any"] }
+# notification providers
+teloxide = { version = "0.12.2", features = ["macros"], optional = true }
 
 [features]
-default = ["telegram"]
+default = [
+	"mysql", "sqlite", "postgres",
+	"telegram",
+]
+# db drivers
+mysql = ["sqlx/mysql"]
+sqlite = ["sqlx/sqlite"]
+postgres = ["sqlx/postgres"]
+# notifier providers
 telegram = ["dep:teloxide"]

src/config.rs

@@ -13,7 +13,8 @@ pub struct ConfigOverrides {
 
 	pub public: Option<bool>,
 
-	pub date: Option<String>,
+	#[serde(default = "_true")]
+	pub date: bool,
 }
 
 #[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
@@ -31,3 +32,5 @@ pub enum ConfigNotifierProvider {
 		chat_id: i64,
 	},
 }
+
+fn _true() -> bool { true }

src/main.rs

@@ -1,7 +1,7 @@
 use std::net::SocketAddr;
 use clap::{Parser, Subcommand};
 
-use crate::{storage::JsonFileStorageStrategy, routes::Context, notifications::console::ConsoleTracingNotifier, config::{Config, ConfigNotifierProvider}};
+use crate::{storage::StorageProvider, routes::Context, notifications::console::ConsoleTracingNotifier, config::{Config, ConfigNotifierProvider}};
 
 mod notifications;
 
@@ -20,7 +20,7 @@ struct CliArgs {
 	action: CliAction,
 
 	/// connection string of storage database
-	#[arg(long, default_value = "./storage.json")] // file://./guestbook.db
+	#[arg(long, default_value = "sqlite://./guestbook.db")]
 	db: String,
 
 	#[arg(long, default_value_t = false)]
@@ -53,9 +53,6 @@ async fn main() {
 		.with_max_level(if args.debug { tracing::Level::DEBUG } else { tracing::Level::INFO })
 		.init();
 
-	// TODO more (and better) storage solutions! sqlx to the rescue...
-	let storage = Box::new(JsonFileStorageStrategy::new(&args.db));
-
 	match args.action {
 		CliAction::Default => {
 			let mut cfg = Config::default();
@@ -75,16 +72,21 @@ async fn main() {
 				}
 			};
 
-			let mut state = Context::new(storage, config.overrides);
+			sqlx::any::install_default_drivers(); // must install all available drivers before connecting
+			let storage = StorageProvider::connect(&args.db, config.overrides).await.unwrap();
+
+			let mut state = Context::new(storage);
 
 			for notifier in config.notifiers.providers {
 				match notifier {
 					ConfigNotifierProvider::ConsoleNotifier => {
+						tracing::info!("registering console notifier");
 						state.register(Box::new(ConsoleTracingNotifier {}));
 					},
 
 					#[cfg(feature = "telegram")]
 					ConfigNotifierProvider::TelegramNotifier { token, chat_id } => {
+						tracing::info!("registering telegram notifier for chat {}", chat_id);
 						state.register(Box::new(
 							notifications::telegram::TGNotifier::new(&token, chat_id)
 						));

src/model.rs

@@ -1,6 +1,7 @@
 use md5::{Md5, Digest};
 use serde::{Serialize, Deserialize};
 use chrono::{DateTime, Utc};
+use sqlx::Row;
 use uuid::Uuid;
 
 use crate::config::ConfigOverrides;
@@ -11,13 +12,37 @@ const BODY_MAX_CHARS: usize = 4096;
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct Page {
+	pub id: i64,
 	pub author: String,
 	pub contact: Option<String>,
 	pub body: String,
-	pub date: DateTime<Utc>,
+	pub timestamp: i64, // sqlx::Any db doesn't support DateTime<Utc>
 	pub public: bool,
 }
 
+// TODO
+// deserializing Option<T> values on AnyDriver is broken, pr to fix is in progress
+//  https://github.com/launchbadge/sqlx/issues/2416
+//  https://github.com/launchbadge/sqlx/pull/2716
+// until this is merged, must implement by hand
+// once this is merged, just do #[derive(sqlx::FromRow)]
+// also what the fuck is going on with bools???
+//  https://github.com/launchbadge/sqlx/issues/2778
+impl<'r> sqlx::FromRow<'r, sqlx::any::AnyRow> for Page {
+	fn from_row(row: &'r sqlx::any::AnyRow) -> Result<Self, sqlx::Error> {
+		Ok(
+			Page {
+				id: row.get(0),
+				author: row.get(1),
+				contact: row.try_get(2).ok(),
+				body: row.get(3),
+				timestamp: row.get(4),
+				public: row.get::<i32, usize>(5) > 0,
+			}
+		)
+	}
+}
+
 
 
 
@@ -31,8 +56,8 @@ pub struct PageView {
 	pub date: DateTime<Utc>,
 }
 
-impl From<Page> for PageView {
-	fn from(page: Page) -> Self {
+impl From<&Page> for PageView {
+	fn from(page: &Page) -> Self {
 		let mut hasher = Md5::new();
 		hasher.update(page.contact.as_deref().unwrap_or(&Uuid::new_v4().to_string()).as_bytes());
 		let avatar = format!("{:x}", hasher.finalize());
@@ -52,84 +77,56 @@ impl From<Page> for PageView {
 
 		PageView {
 			url, avatar,
-			author: page.author,
-			contact: page.contact,
-			body: page.body,
-			date: page.date,
+			author: page.author.clone(),
+			contact: page.contact.clone(),
+			body: page.body.clone(),
+			date: DateTime::from_timestamp(page.timestamp, 0).unwrap_or(DateTime::UNIX_EPOCH),
 		}
 	}
 }
 
 
 
-
 #[derive(Debug, Clone, Default, Deserialize)]
 pub struct PageInsertion {
-	#[serde(deserialize_with = "non_empty_str")]
-	pub author: Option<String>,
-
-	#[serde(deserialize_with = "non_empty_str")]
-	pub contact: Option<String>,
-
 	pub body: String,
-
+	pub author: Option<String>,
+	pub contact: Option<String>,
 	pub public: Option<bool>,
-
 	pub date: Option<DateTime<Utc>>,
 }
 
 impl PageInsertion {
+	fn trim_and_escape(input: &str, len: usize) -> String {
+		html_escape::encode_safe(&input.chars().take(len).collect::<String>()).to_string()
+	}
+
 	pub fn sanitize(&mut self) {
-		self.author = self.author.as_mut().map(|x| html_escape::encode_safe(&x.chars().take(AUTHOR_MAX_CHARS).collect::<String>()).to_string());
-		self.contact = self.contact.as_mut().map(|x| html_escape::encode_safe(&x.chars().take(CONTACT_MAX_CHARS).collect::<String>()).to_string());
-		self.body = html_escape::encode_safe(&self.body.chars().take(BODY_MAX_CHARS).collect::<String>()).to_string();
+		if let Some(author) = self.author.as_mut() {
+			*author = Self::trim_and_escape(author, AUTHOR_MAX_CHARS);
+		}
+		if self.author.is_some() && self.author.as_deref().unwrap().is_empty() {
+			self.author = None;
+		}
+		if let Some(contact) = self.contact.as_mut() {
+			*contact = Self::trim_and_escape(contact, CONTACT_MAX_CHARS);
+		}
+		if self.contact.is_some() && self.contact.as_deref().unwrap().is_empty() {
+			self.contact = None;
+		}
+		self.body = Self::trim_and_escape(&self.body, BODY_MAX_CHARS);
 	}
 
-	pub fn convert(mut self, overrides: &ConfigOverrides) -> Page {
-		self.sanitize();
-
-		let mut page = Page {
-			author: self.author.unwrap_or("".into()),
-			contact: self.contact,
-			body: self.body,
-			date: self.date.unwrap_or(Utc::now()),
-			public: self.public.unwrap_or(true),
-		};
-
-		if let Some(author) = &overrides.author {
-			page.author = author.to_string();
-		}
-		if let Some(public) = overrides.public {
-			page.public = public;
-		}
-		if let Some(date) = &overrides.date {
-			if date.to_lowercase() == "now" {
-				page.date = Utc::now();
-			} else {
-				page.date = DateTime::parse_from_rfc3339(date).unwrap().into();
-			}
-		}
-
-		page
+	pub fn overrides(&mut self, overrides: &ConfigOverrides) {
+		if let Some(public) = overrides.public { self.public = Some(public) };
+		if let Some(author) = &overrides.author { self.author = Some(author.clone()) };
+		if overrides.date { self.date = Some(Utc::now()) };
 	}
 }
 
 
-
-
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub enum Acknowledgement {
-	Sent(String),
-	Refused(String),
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct PageOptions {
-	pub offset: Option<usize>,
-	pub limit: Option<usize>,
-}
-
-fn non_empty_str<'de, D: serde::Deserializer<'de>>(d: D) -> Result<Option<String>, D::Error> {
-	Ok(Option::deserialize(d)?.filter(|s: &String| !s.is_empty()))
+	pub offset: Option<i32>,
+	pub limit: Option<i32>,
 }

src/routes.rs

@@ -2,7 +2,7 @@ use std::sync::Arc;
 
 use axum::{Json, Form, Router, routing::{put, post, get}, extract::{State, Query}, response::Redirect};
 
-use crate::{notifications::NotificationProcessor, model::{Page, PageOptions, PageInsertion}, storage::StorageStrategy, config::ConfigOverrides};
+use crate::{notifications::NotificationProcessor, model::{Page, PageOptions, PageInsertion, PageView}, storage::StorageProvider};
 
 pub fn create_router_with_app_routes(state: Context) -> Router {
 	Router::new()
@@ -14,13 +14,12 @@ pub fn create_router_with_app_routes(state: Context) -> Router {
 
 pub struct Context {
 	providers: Vec<Box<dyn NotificationProcessor<Page>>>,
-	storage: Box<dyn StorageStrategy<Page>>,
-	overrides: ConfigOverrides,
+	storage: StorageProvider,
 }
 
 impl Context {
-	pub fn new(storage: Box<dyn StorageStrategy<Page>>, overrides: ConfigOverrides) -> Self {
-		Context { providers: Vec::new(), storage, overrides }
+	pub fn new(storage: StorageProvider) -> Self {
+		Context { providers: Vec::new(), storage }
 	}
 	
 	pub fn register(&mut self, notifier: Box<dyn NotificationProcessor<Page>>) {
@@ -29,13 +28,15 @@ impl Context {
 }
 
 async fn send_suggestion(payload: PageInsertion, state: Arc<Context>) -> Result<Redirect, String> {
-	let page = payload.convert(&state.overrides);
-	for p in state.providers.iter() {
-		p.process(&page).await;
-	}
-	match state.storage.archive(page).await {
-		Ok(()) => Ok(Redirect::to("/")),
+	tracing::debug!("processing insertion {:?}", payload);
+	match state.storage.archive(payload).await {
 		Err(e) => Err(e.to_string()),
+		Ok(page) => {
+			for p in state.providers.iter() {
+				p.process(&page).await;
+			}
+			Ok(Redirect::to("/"))
+		},
 	}
 }
 
@@ -43,9 +44,10 @@ async fn send_suggestion_json(State(state): State<Arc<Context>>, Json(payload):
 async fn send_suggestion_form(State(state): State<Arc<Context>>, Form(payload): Form<PageInsertion>) -> Result<Redirect, String> { send_suggestion(payload, state).await }
 
 
-async fn get_suggestion(State(state): State<Arc<Context>>, Query(page): Query<PageOptions>) -> Result<Json<Vec<Page>>, String> {
+async fn get_suggestion(State(state): State<Arc<Context>>, Query(page): Query<PageOptions>) -> Result<Json<Vec<PageView>>, String> {
 	let offset = page.offset.unwrap_or(0);
 	let limit = std::cmp::min(page.limit.unwrap_or(20), 20);
+	tracing::debug!("serving suggestions (offset {} limit {}", offset, limit);
 
 	match state.storage.extract(offset, limit).await {
 		Ok(x) => Ok(Json(x)),

src/storage.rs

@@ -1,57 +1,88 @@
-use tokio::sync::RwLock;
+use chrono::Utc;
 
-use crate::model::Page;
+use crate::{model::{PageView, PageInsertion, Page}, config::ConfigOverrides};
 
-
-#[derive(Debug, thiserror::Error)]
-pub enum StorageStrategyError {
-	#[error("could not interact with filesystem: {0}")]
-	IOError(#[from] std::io::Error),
-	#[error("could not serialize/deserialize data: {0}")]
-	JsonSerializeError(#[from] serde_json::Error),
+#[derive(Debug)]
+pub struct StorageProvider {
+	db: sqlx::Pool<sqlx::Any>,
+	overrides: ConfigOverrides,
 }
 
-#[async_trait::async_trait]
-pub trait StorageStrategy<T> : Send + Sync {
-	async fn archive(&self, payload: T) -> Result<(), StorageStrategyError>;
-	async fn extract(&self, offset: usize, window: usize) -> Result<Vec<T>, StorageStrategyError>;
-}
+// TODO bool type is not supported in Any driver?????
+//  so the `public` field is an integer which is ridicolous
+//  but literally cannot get it to work ffs
+//
+//  https://github.com/launchbadge/sqlx/issues/2778
 
+const SQLITE_SCHEMA : &str = "
+CREATE TABLE IF NOT EXISTS pages (
+	id INTEGER PRIMARY KEY AUTOINCREMENT,
+	author VARCHAR NOT NULL,
+	contact VARCHAR,
+	body VARCHAR NOT NULL,
+	timestamp INTEGER NOT NULL,
+	public INTEGER NOT NULL
+);
+";
 
-/// this strategy is rather inefficient since it has to iterate the whole file every time, but it
-/// requires literally zero effort
-pub struct JsonFileStorageStrategy {
-	path: RwLock<String>, // only needed to prevent race conditions on insertion
-}
+const POSTGRES_SCHEMA : &str = "
+CREATE TABLE IF NOT EXISTS pages (
+	id SERIAL PRIMARY KEY,
+	author TEXT NOT NULL,
+	contact TEXT,
+	body TEXT NOT NULL,
+	timestamp INTEGER NOT NULL,
+	public INTEGER NOT NULL
+);
+";
 
-impl JsonFileStorageStrategy {
-	pub fn new(path: &str) -> Self {
-		JsonFileStorageStrategy { path: RwLock::new(path.to_string()) }
-	}
-}
+impl StorageProvider {
+	pub async fn connect(dest: &str, overrides: ConfigOverrides) -> sqlx::Result<Self> {
+		let db = sqlx::AnyPool::connect(dest).await?;
 
-
-#[async_trait::async_trait]
-impl StorageStrategy<Page> for JsonFileStorageStrategy {
-	async fn archive(&self, payload: Page) -> Result<(), StorageStrategyError> {
-		let path = self.path.write().await;
-		let file_content = std::fs::read_to_string(&*path)?;
-		let mut current_content : Vec<Page> = serde_json::from_str(&file_content)?;
-		current_content.push(payload);
-		let updated_content = serde_json::to_string(&current_content)?;
-		std::fs::write(&*path, updated_content)?;
-		Ok(())
-	}
-
-	async fn extract(&self, offset: usize, window: usize) -> Result<Vec<Page>, StorageStrategyError> {
-		let path = self.path.read().await;
-		let file_content = std::fs::read_to_string(&*path)?;
-		let current_content : Vec<Page> = serde_json::from_str(&file_content)?;
-		let mut out = Vec::new();
-		for sugg in current_content.iter().rev().skip(offset) {
-			out.push(sugg.clone());
-			if out.len() >= window { break };
+		match db.acquire().await?.backend_name() {
+			"PostgreSQL" => { sqlx::query(POSTGRES_SCHEMA).execute(&db).await?; },
+			"SQLite" => { sqlx::query(SQLITE_SCHEMA).execute(&db).await?; },
+			"MySQL" => { sqlx::query(SQLITE_SCHEMA).execute(&db).await?; }, // TODO will this work?
+			_ => tracing::warn!("could not ensure schema: unsupported database type"),
 		}
+
+		Ok(StorageProvider { db, overrides })
+	}
+
+	pub async fn archive(&self, mut page: PageInsertion) -> sqlx::Result<Page> {
+		page.sanitize();
+		page.overrides(&self.overrides);
+		let result = sqlx::query("INSERT INTO pages (author, contact, body, timestamp, public) VALUES ($1, $2, $3, $4, $5)")
+			.bind(page.author.as_deref().unwrap_or("anonymous").to_string())
+			.bind(page.contact.clone())
+			.bind(page.body.clone())
+			.bind(page.date.unwrap_or(Utc::now()).timestamp())
+			.bind(if page.public.unwrap_or(true) { 1 } else { 0 })
+			.execute(&self.db)
+			.await?;
+		Ok(
+			Page {
+				id: result.last_insert_id().unwrap_or(-1),
+				author: page.author.unwrap_or("anonymous".into()),
+				contact: page.contact,
+				body: page.body,
+				timestamp: page.date.unwrap_or(Utc::now()).timestamp(),
+				public: page.public.unwrap_or(true),
+			}
+		)
+	}
+
+	pub async fn extract(&self, offset: i32, window: i32) -> sqlx::Result<Vec<PageView>> {
+		// TODO since AnyPool won't handle booleans we compare with an integer
+		let out = sqlx::query_as("SELECT * FROM pages WHERE public = 1 LIMIT $1 OFFSET $2")
+			.bind(window)
+			.bind(offset)
+			.fetch_all(&self.db)
+			.await?
+			.iter()
+			.map(PageView::from)
+			.collect();
 		Ok(out)
 	}
 }