♻️ Major code restructuring

packages/pagetop-user/src/migration/m20220312_000001_create_table_role.rs

@@ -0,0 +1,71 @@
+use pagetop::prelude::*;
+
+#[rustfmt::skip]
+#[derive(Iden)]
+enum Role {
+    Table,              // role: Store user roles.
+
+    Rid,                // Primary Key: Unique role ID.
+    Name,               // Unique role name.
+    Weight,             // The weight of this role in listings and the user interface.
+}
+
+new_migration!(Migration);
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(Role::Table)
+                    .if_not_exists()
+                    .col(
+                        ColumnDef::new(Role::Rid)
+                            .unsigned()
+                            .not_null()
+                            .auto_increment()
+                            .primary_key(),
+                    )
+                    .col(
+                        ColumnDef::new(Role::Name)
+                            .string_len(64)
+                            .not_null()
+                            .unique_key(),
+                    )
+                    .col(
+                        ColumnDef::new(Role::Weight)
+                            .integer()
+                            .not_null()
+                            .default(10),
+                    )
+                    // INDEXES.
+                    .index(
+                        Index::create()
+                            .name("weight-name")
+                            .col(Role::Weight)
+                            .col(Role::Name),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        // Built-in roles.
+        db::exec::<InsertStatement>(
+            Query::insert()
+                .into_table(Role::Table)
+                .columns(vec![Role::Name, Role::Weight])
+                .values_panic(vec!["anonymous".into(), "1".into()])
+                .values_panic(vec!["authenticated".into(), "2".into()])
+                .values_panic(vec!["administrator".into(), "3".into()]),
+        )
+        .await
+        .map(|_| ())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(Role::Table).to_owned())
+            .await
+    }
+}