From b42ded93f6ee1951c1c755513b0f3109b87570ae Mon Sep 17 00:00:00 2001
From: "s0wlz (Matthias Puchstein)" <matthias@puchstein.lu>
Date: Wed, 29 Apr 2026 23:05:05 +0200
Subject: [PATCH] feat: add DEMO env var to seed demo data on startup

---
 backend/src/db.rs                | 11 +++++++++++
 backend/src/main.rs              |  1 +
 deploy/templates/deployment.yaml |  4 ++++
 deploy/values.yaml               |  3 +++
 4 files changed, 19 insertions(+)

diff --git a/backend/src/db.rs b/backend/src/db.rs
index 9cabaec..1f85bdb 100644
--- a/backend/src/db.rs
+++ b/backend/src/db.rs
@@ -13,6 +13,17 @@ pub async fn init() -> Result<SqlitePool, sqlx::Error> {
     Ok(pool)
 }
 
+pub async fn maybe_seed_demo(pool: &SqlitePool) {
+    if std::env::var("DEMO").as_deref() != Ok("true") {
+        return;
+    }
+    let seed = include_str!("../demo/demo_seed.sql");
+    match sqlx::raw_sql(seed).execute(pool).await {
+        Ok(_) => tracing::info!("DEMO seed applied"),
+        Err(e) => tracing::warn!("DEMO seed failed: {e}"),
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/backend/src/main.rs b/backend/src/main.rs
index 40fc6e3..356a0ea 100644
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -29,6 +29,7 @@ async fn main() {
     }
 
     let pool = db::init().await.expect("db init failed");
+    db::maybe_seed_demo(&pool).await;
 
     let static_dir = std::env::var("STATIC_DIR")
         .unwrap_or_else(|_| "../frontend/build".into());
diff --git a/deploy/templates/deployment.yaml b/deploy/templates/deployment.yaml
index 1b1ac42..5fc412f 100644
--- a/deploy/templates/deployment.yaml
+++ b/deploy/templates/deployment.yaml
@@ -33,6 +33,10 @@ spec:
               value: {{ .Values.env.DATABASE_URL | quote }}
             - name: STATIC_DIR
               value: {{ .Values.env.STATIC_DIR | quote }}
+            {{- range $k, $v := .Values.env.extra }}
+            - name: {{ $k }}
+              value: {{ $v | quote }}
+            {{- end }}
             - name: JWT_SECRET
               valueFrom:
                 secretKeyRef:
diff --git a/deploy/values.yaml b/deploy/values.yaml
index d79ec92..b1e913e 100644
--- a/deploy/values.yaml
+++ b/deploy/values.yaml
@@ -48,6 +48,9 @@ jwtSecretName: tutortool-jwt
 env:
   DATABASE_URL: sqlite:/data/attendance.db
   STATIC_DIR: /app/frontend/build
+  extra: {}
+  # extra:
+  #   DEMO: "true"   # seeds demo data on startup (idempotent, INSERT OR IGNORE)
 
 vpa:
   enabled: false