libdrcr: Allow configuring backend plugins

libdrcr/plugins/austax/init.luau

@@ -1,5 +1,5 @@
 --!strict
---  DrCr: Web-based double-entry bookkeeping framework
+--  DrCr: Double-entry bookkeeping framework
 --  Copyright (C) 2022-2025  Lee Yingtong Li (RunasSudo)
 --
 --  This program is free software: you can redistribute it and/or modify
@@ -15,8 +15,8 @@
 --  You should have received a copy of the GNU Affero General Public License
 --  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-local libdrcr = require('../libdrcr')
-local reporting = require('../austax/reporting')
+local libdrcr = require('./libdrcr')
+local reporting = require('./austax/reporting')
 
 local plugin: libdrcr.Plugin = {
 	name = 'austax',

libdrcr/src/db.rs

@@ -1,5 +1,5 @@
 /*
-	DrCr: Web-based double-entry bookkeeping framework
+	DrCr: Double-entry bookkeeping framework
 	Copyright (C) 2022-2025  Lee Yingtong Li (RunasSudo)
 
 	This program is free software: you can redistribute it and/or modify
@@ -216,6 +216,7 @@ pub struct DbMetadata {
 	pub eofy_date: NaiveDate,
 	pub reporting_commodity: String,
 	pub dps: u32,
+	pub plugins: Vec<String>,
 }
 
 impl DbMetadata {
@@ -256,11 +257,27 @@ impl DbMetadata {
 			.await
 			.expect("SQL error");
 
+		let plugins_joined = sqlx::query("SELECT value FROM metadata WHERE key = 'plugins'")
+			.map(|r: SqliteRow| r.get::<String, _>(0))
+			.fetch_one(&mut *connection)
+			.await
+			.expect("SQL error");
+
+		let plugins = if plugins_joined.len() > 0 {
+			plugins_joined
+				.split(';')
+				.map(String::from)
+				.collect::<Vec<_>>()
+		} else {
+			vec![]
+		};
+
 		DbMetadata {
 			version,
 			eofy_date,
 			reporting_commodity,
 			dps,
+			plugins,
 		}
 	}
 }

libdrcr/src/main.rs

@@ -39,7 +39,7 @@ async fn main() {
 	let mut context = ReportingContext::new(
 		db_connection,
 		"plugins".to_string(),
-		vec!["austax.plugin".to_string()],
+		vec!["austax".to_string()],
 		NaiveDate::from_ymd_opt(2025, 6, 30).unwrap(),
 		"$".to_string(),
 	);

libdrcr/src/plugin.rs

@@ -1,5 +1,5 @@
 /*
-	DrCr: Web-based double-entry bookkeeping framework
+	DrCr: Double-entry bookkeeping framework
 	Copyright (C) 2022-2025  Lee Yingtong Li (RunasSudo)
 
 	This program is free software: you can redistribute it and/or modify
@@ -41,7 +41,7 @@ fn load_plugin(plugin_dir: &str, plugin_name: &str) -> (Lua, Plugin) {
 	// Init Lua environment
 	let package = lua.globals().get::<Table>("package").unwrap();
 	package
-		.set("path", format!("{}/?.luau", plugin_dir))
+		.set("path", format!("{0}/?.luau;{0}/?/init.luau", plugin_dir))
 		.unwrap();
 
 	// Require and call the plugin

src-tauri/src/libdrcr_bridge.rs

@@ -1,5 +1,5 @@
 /*
-	DrCr: Web-based double-entry bookkeeping framework
+	DrCr: Double-entry bookkeeping framework
 	Copyright (C) 2022-2025  Lee Yingtong Li (RunasSudo)
 
 	This program is free software: you can redistribute it and/or modify
@@ -42,11 +42,6 @@ fn prepare_reporting_context(context: &mut ReportingContext) {
 	libdrcr::plugin::register_lookup_fns(context);
 }
 
-fn get_plugins() -> Vec<String> {
-	// FIXME: Dynamically get this
-	vec!["austax.plugin".to_string()]
-}
-
 pub(crate) async fn get_report(
 	app: AppHandle,
 	state: State<'_, Mutex<AppState>>,
@@ -61,6 +56,7 @@ pub(crate) async fn get_report(
 
 	// Initialise ReportingContext
 	let eofy_date = db_connection.metadata().eofy_date;
+	let plugin_names = db_connection.metadata().plugins.clone();
 	let mut context = ReportingContext::new(
 		db_connection,
 		app.path()
@@ -69,22 +65,25 @@ pub(crate) async fn get_report(
 			.to_str()
 			.unwrap()
 			.to_string(),
-		get_plugins(),
+		plugin_names,
 		eofy_date,
 		"$".to_string(),
 	);
 	prepare_reporting_context(&mut context);
 
 	// Get dynamic report
-	let targets = vec![
-		// FIXME: Make this configurable
-		ReportingProductId {
+	let mut targets = vec![target.clone()];
+
+	// Add plugin targets
+	// FIXME: Detect this robustly
+	if context.plugin_names.contains(&"austax".to_string()) {
+		targets.push(ReportingProductId {
 			name: "CalculateIncomeTax".to_string(),
 			kind: ReportingProductKind::Transactions,
 			args: ReportingStepArgs::VoidArgs,
-		},
-		target.clone(),
-	];
+		});
+	}
+
 	let products = generate_report(targets, Arc::new(context)).await.unwrap();
 	let result = products.get_owned_or_err(&target).unwrap();
 
@@ -262,6 +261,7 @@ pub(crate) async fn get_validated_balance_assertions(
 
 	// Initialise ReportingContext
 	let eofy_date = db_connection.metadata().eofy_date;
+	let plugin_names = db_connection.metadata().plugins.clone();
 	let mut context = ReportingContext::new(
 		db_connection,
 		app.path()
@@ -270,18 +270,14 @@ pub(crate) async fn get_validated_balance_assertions(
 			.to_str()
 			.unwrap()
 			.to_string(),
-		get_plugins(),
+		plugin_names,
 		eofy_date,
 		"$".to_string(),
 	);
 	prepare_reporting_context(&mut context);
 
 	// Get report targets
-	let mut targets = vec![ReportingProductId {
-		name: "CalculateIncomeTax".to_string(),
-		kind: ReportingProductKind::Transactions,
-		args: ReportingStepArgs::VoidArgs,
-	}];
+	let mut targets = Vec::new();
 	for dt in dates {
 		// Request ordinary transaction balances at each balance assertion date
 		targets.push(ReportingProductId {
@@ -291,6 +287,16 @@ pub(crate) async fn get_validated_balance_assertions(
 		});
 	}
 	
+	// Add plugin targets
+	// FIXME: Detect this robustly
+	if context.plugin_names.contains(&"austax".to_string()) {
+		targets.push(ReportingProductId {
+			name: "CalculateIncomeTax".to_string(),
+			kind: ReportingProductKind::Transactions,
+			args: ReportingStepArgs::VoidArgs,
+		});
+	}
+
 	// Run report
 	let products = generate_report(targets, Arc::new(context)).await.unwrap();