dynamic prices with dicounts

src/shared/pricing.rs

@@ -338,6 +338,38 @@ pub async fn detail_many(
     Ok(list.iter().map(|p| detail_for(p, &pc)).collect())
 }
 
+/// Effective prices for a whole audience using only the global layers (the
+/// per-product sale + audience-assigned profiles + the business baseline), with
+/// no specific company's per-company deals. Used by the discounts admin page to
+/// preview what each tab's discounts produce. `audience` is "personal" or
+/// "business".
+pub async fn audience_price_many(
+    ctx: &AppContext,
+    list: &[products::Model],
+    audience: &str,
+) -> Result<Vec<PricedProduct>> {
+    let personal = load_audience(ctx, AUDIENCE_PERSONAL).await?;
+    let (business, b2b) = if audience == AUDIENCE_BUSINESS {
+        (
+            load_audience(ctx, AUDIENCE_BUSINESS).await?,
+            // A generic company with no per-company profiles/negotiated prices.
+            Some(B2bContext {
+                manual: HashMap::new(),
+                profiles: LoadedProfiles::empty(),
+                resolutions: HashMap::new(),
+            }),
+        )
+    } else {
+        (LoadedProfiles::empty(), None)
+    };
+    let pc = PricingCtx {
+        personal,
+        business,
+        b2b,
+    };
+    Ok(list.iter().map(|p| detail_for(p, &pc).priced()).collect())
+}
+
 /// Price one product for `user` (`None` = anonymous/public).
 pub async fn price_for(
     ctx: &AppContext,