feat: Moves database dependency directory.

Sources/App/DB/EmployeeDB.swift

@@ -0,0 +1,83 @@
+import Dependencies
+import DependenciesMacros
+import Fluent
+import Vapor
+
+extension DependencyValues {
+  // An intermediate layer between our api and view controllers that interacts with the
+  // database model.
+  var employees: EmployeeDB {
+    get { self[EmployeeDB.self] }
+    set { self[EmployeeDB.self] = newValue }
+  }
+}
+
+@DependencyClient
+struct EmployeeDB: Sendable {
+  var create: @Sendable (Employee.Create) async throws -> Employee.DTO
+  var fetchAll: @Sendable (Bool) async throws -> [Employee.DTO]
+  var get: @Sendable (Employee.IDValue) async throws -> Employee.DTO?
+  var update: @Sendable (Employee.IDValue, Employee.Update) async throws -> Employee.DTO
+  var delete: @Sendable (Employee.IDValue) async throws -> Void
+  var toggleActive: @Sendable (Employee.IDValue) async throws -> Employee.DTO
+
+  func fetchAll() async throws -> [Employee.DTO] {
+    try await fetchAll(false)
+  }
+
+  func get(_ id: String?) async throws -> Employee.DTO? {
+    guard let idString = id, let id = UUID(uuidString: idString) else {
+      throw Abort(.badRequest, reason: "Employee id not valid.")
+    }
+    return try await get(id)
+  }
+}
+
+extension EmployeeDB: TestDependencyKey {
+  static let testValue: EmployeeDB = Self()
+
+  static func live(database: any Database) -> Self {
+    .init(
+      create: { model in
+        let model = model.toModel()
+        try await model.save(on: database)
+        return model.toDTO()
+      },
+      fetchAll: { active in
+        var query = Employee.query(on: database)
+          .sort(\.$lastName)
+
+        if active {
+          query = query.filter(\.$active == active)
+        }
+
+        return try await query.all().map { $0.toDTO() }
+      },
+      get: { id in
+        try await Employee.find(id, on: database).map { $0.toDTO() }
+      },
+      update: { id, updates in
+        guard let employee = try await Employee.find(id, on: database) else {
+          throw Abort(.badRequest, reason: "Employee id not found.")
+        }
+        employee.applyUpdates(updates)
+        try await employee.save(on: database)
+        return employee.toDTO()
+      },
+      delete: { id in
+        guard let employee = try await Employee.find(id, on: database) else {
+          throw Abort(.badRequest, reason: "Employee id not found.")
+        }
+        try await employee.delete(on: database)
+      },
+      toggleActive: { id in
+        guard let employee = try await Employee.find(id, on: database) else {
+          throw Abort(.notFound)
+        }
+        employee.active.toggle()
+        try await employee.save(on: database)
+        return employee.toDTO()
+      }
+    )
+  }
+}