From 22847fc42a598f3ed00b5f863d32bf5c71ba6cdc Mon Sep 17 00:00:00 2001
From: Jean-Gabriel Gill-Couture <jg@nationtech.io>
Date: Tue, 24 Jun 2025 11:19:46 -0400
Subject: [PATCH] feat: WIP application module that will allow easy design of
 application/solution scores with standard delivery features like
 CI/CD/Backups/Multisite

---
 harmony/src/modules/application/mod.rs | 83 ++++++++++++++++++++++++++
 harmony/src/modules/mod.rs             |  1 +
 2 files changed, 84 insertions(+)
 create mode 100644 harmony/src/modules/application/mod.rs

diff --git a/harmony/src/modules/application/mod.rs b/harmony/src/modules/application/mod.rs
new file mode 100644
index 0000000..54422aa
--- /dev/null
+++ b/harmony/src/modules/application/mod.rs
@@ -0,0 +1,83 @@
+use async_trait::async_trait;
+use serde::Serialize;
+
+use crate::{
+    data::{Id, Version},
+    interpret::{Interpret, InterpretError, InterpretName, InterpretStatus, Outcome},
+    inventory::Inventory,
+    score::Score,
+    topology::Topology,
+};
+
+#[derive(Clone, Serialize, Debug)]
+pub struct GoApplicationConfig {}
+
+#[derive(Clone, Serialize, Debug)]
+pub struct GoApplicationScore {
+    pub config: GoApplicationConfig,
+}
+
+impl<T: Topology> Score<T> for GoApplicationScore {
+    fn create_interpret(&self) -> Box<dyn crate::interpret::Interpret<T>> {
+        todo!()
+    }
+
+    fn name(&self) -> String {
+        todo!()
+    }
+}
+
+#[derive(Debug)]
+pub struct ApplicationInterpret {
+    pub features: Vec<Box<dyn ApplicationFeature>>,
+}
+
+#[async_trait]
+impl<T: Topology> Interpret<T> for ApplicationInterpret {
+    async fn execute(&self, _inventory: &Inventory, _topology: &T) -> Result<Outcome, InterpretError> {
+        todo!()
+    }
+
+    fn get_name(&self) -> InterpretName {
+        todo!()
+    }
+
+    fn get_version(&self) -> Version {
+        todo!()
+    }
+
+    fn get_status(&self) -> InterpretStatus {
+        todo!()
+    }
+
+    fn get_children(&self) -> Vec<Id> {
+        todo!()
+    }
+}
+
+/// An ApplicationFeature provided by harmony, such as Backups, Monitoring, MultisiteAvailability,
+/// ContinuousIntegration, ContinuousDelivery
+#[async_trait]
+pub trait ApplicationFeature: std::fmt::Debug + Send + Sync {
+    async fn ensure_installed(&self) -> Result<(), String>;
+    async fn is_installed(&self) -> Result<bool, String>;
+    async fn uninstall(&self) -> Result<(), String>;
+}
+
+#[derive(Debug)]
+pub struct BackupFeature;
+
+#[async_trait]
+impl ApplicationFeature for BackupFeature {
+    async fn ensure_installed(&self) -> Result<(), String> {
+        todo!()
+    }
+
+    async fn is_installed(&self) -> Result<bool, String> {
+        todo!()
+    }
+
+    async fn uninstall(&self) -> Result<(), String> {
+        todo!()
+    }
+}
diff --git a/harmony/src/modules/mod.rs b/harmony/src/modules/mod.rs
index 1427515..465587b 100644
--- a/harmony/src/modules/mod.rs
+++ b/harmony/src/modules/mod.rs
@@ -14,3 +14,4 @@ pub mod okd;
 pub mod opnsense;
 pub mod tenant;
 pub mod tftp;
+pub mod application;