discount profiles and discounts overall implemented and working

migration/src/lib.rs

@@ -37,6 +37,7 @@ mod m20260618_000004_account_ownership;
 mod m20260620_000001_add_totp_to_users;
 mod m20260621_000001_add_sale_price_to_products;
 mod m20260621_000002_account_product_prices;
+mod m20260621_000003_discount_profiles;
 pub struct Migrator;
 
 #[async_trait::async_trait]
@@ -78,6 +79,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260620_000001_add_totp_to_users::Migration),
             Box::new(m20260621_000001_add_sale_price_to_products::Migration),
             Box::new(m20260621_000002_account_product_prices::Migration),
+            Box::new(m20260621_000003_discount_profiles::Migration),
             // inject-above (do not remove this comment)
         ]
     }

migration/src/m20260621_000003_discount_profiles.rs

@@ -0,0 +1,91 @@
+use loco_rs::schema::*;
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, m: &SchemaManager) -> Result<(), DbErr> {
+        // A reusable, named discount layer: a percentage (basis points, 5% = 500)
+        // over a product scope. `scope_type` is 'include' (covers the listed
+        // products) or 'all_except' (covers everything but the listed products).
+        create_table(
+            m,
+            "discount_profiles",
+            &[
+                ("id", ColType::PkAuto),
+                ("name", ColType::String),
+                ("percent_bp", ColType::Integer),
+                ("scope_type", ColType::StringWithDefault("include".to_string())),
+            ],
+            &[],
+        )
+        .await?;
+
+        // Which products the scope lists (meaning depends on scope_type).
+        create_table(
+            m,
+            "discount_profile_products",
+            &[("id", ColType::PkAuto)],
+            &[("discount_profile", ""), ("product", "")],
+        )
+        .await?;
+        m.create_index(
+            Index::create()
+                .name("idx_discount_profile_products_unique")
+                .table(Alias::new("discount_profile_products"))
+                .col(Alias::new("discount_profile_id"))
+                .col(Alias::new("product_id"))
+                .unique()
+                .to_owned(),
+        )
+        .await?;
+
+        // Which profiles a business account has (mixable).
+        create_table(
+            m,
+            "account_discount_profiles",
+            &[("id", ColType::PkAuto)],
+            &[("user", ""), ("discount_profile", "")],
+        )
+        .await?;
+        m.create_index(
+            Index::create()
+                .name("idx_account_discount_profiles_unique")
+                .table(Alias::new("account_discount_profiles"))
+                .col(Alias::new("user_id"))
+                .col(Alias::new("discount_profile_id"))
+                .unique()
+                .to_owned(),
+        )
+        .await?;
+
+        // The admin's chosen winning profile when two assigned profiles cover the
+        // same product for an account (collision resolution).
+        create_table(
+            m,
+            "account_product_resolutions",
+            &[("id", ColType::PkAuto)],
+            &[("user", ""), ("product", ""), ("discount_profile", "")],
+        )
+        .await?;
+        m.create_index(
+            Index::create()
+                .name("idx_account_product_resolutions_unique")
+                .table(Alias::new("account_product_resolutions"))
+                .col(Alias::new("user_id"))
+                .col(Alias::new("product_id"))
+                .unique()
+                .to_owned(),
+        )
+        .await
+    }
+
+    async fn down(&self, m: &SchemaManager) -> Result<(), DbErr> {
+        drop_table(m, "account_product_resolutions").await?;
+        drop_table(m, "account_discount_profiles").await?;
+        drop_table(m, "discount_profile_products").await?;
+        drop_table(m, "discount_profiles").await
+    }
+}