feat: working on detail views.

Sources/App/DB/VendorBranchDB.swift

@@ -14,13 +14,18 @@ public extension DependencyValues {
 public struct VendorBranchDB: Sendable {
   var create: @Sendable (VendorBranch.Create, Vendor.IDValue) async throws -> VendorBranch.DTO
   var delete: @Sendable (VendorBranch.IDValue) async throws -> Void
-  var fetchAll: @Sendable (Bool) async throws -> [VendorBranch.DTO]
-  var fetchForVendor: @Sendable (Vendor.IDValue) async throws -> [VendorBranch.DTO]
+  var fetchAll: @Sendable (FetchRequest) async throws -> [VendorBranch.DTO]
   var get: @Sendable (VendorBranch.IDValue) async throws -> VendorBranch.DTO?
   var update: @Sendable (VendorBranch.IDValue, VendorBranch.Update) async throws -> VendorBranch.DTO
 
+  enum FetchRequest: Equatable {
+    case `default`
+    case `for`(vendorID: Vendor.IDValue)
+    case withVendor
+  }
+
   func fetchAll() async throws -> [VendorBranch.DTO] {
-    try await fetchAll(false)
+    try await fetchAll(.default)
   }
 }
 
@@ -43,28 +48,30 @@ extension VendorBranchDB: TestDependencyKey {
         }
         try await branch.delete(on: db)
       },
-      fetchAll: { withVendor in
+      fetchAll: { request in
         var query = VendorBranch.query(on: db)
-        if withVendor == true {
+        switch request {
+        case .withVendor:
           query = query.with(\.$vendor)
+
+        case let .for(vendorID: vendorID):
+          let branches = try await Vendor.query(on: db)
+            .filter(\.$id == vendorID)
+            .with(\.$branches)
+            .first()?
+            .branches
+            .map { $0.toDTO() }
+
+          guard let branches else { throw Abort(.badGateway, reason: "Vendor id not found.") }
+          return branches
+
+        case .default:
+          break
         }
         return try await query.all().map { $0.toDTO() }
 
-      },
-      fetchForVendor: { vendorID in
-        guard let vendor = try await Vendor.query(on: db)
-          .filter(\.$id == vendorID)
-          .with(\.$branches)
-          .first()
-        else {
-          throw Abort(.notFound)
-        }
-
-        return vendor.branches.map { $0.toDTO() }
-
       },
       get: { id in
-
         try await VendorBranch.find(id, on: db).map { $0.toDTO() }
       },
       update: { id, updates in