feat: Begins breaking out database interfaces and api controllers into seperate items.

Sources/App/Controllers/Api/VendorApiController.swift

@@ -0,0 +1,52 @@
+import Fluent
+import Vapor
+
+struct VendorApiController: RouteCollection {
+  private let vendors = VendorDB()
+
+  func boot(routes: any RoutesBuilder) throws {
+    let protected = routes.apiProtected(route: "vendors")
+    protected.get(use: index(req:))
+    protected.post(use: create(req:))
+    protected.group(":id") {
+      $0.put(use: update(req:))
+      $0.delete(use: delete(req:))
+    }
+  }
+
+  @Sendable
+  func index(req: Request) async throws -> [Vendor.DTO] {
+    let params = try req.query.decode(VendorsIndexQuery.self)
+    return try await vendors.fetchAll(withBranches: params.branches, on: req.db)
+  }
+
+  @Sendable
+  func create(req: Request) async throws -> Vendor.DTO {
+    try Vendor.Create.validate(content: req)
+    let model = try req.content.decode(Vendor.Create.self)
+    return try await vendors.create(model, on: req.db)
+  }
+
+  @Sendable
+  func update(req: Request) async throws -> Vendor.DTO {
+    guard let id = req.parameters.get("id", as: Vendor.IDValue.self) else {
+      throw Abort(.badRequest, reason: "Vendor id not provided.")
+    }
+    try Vendor.Update.validate(content: req)
+    let updates = try req.content.decode(Vendor.Update.self)
+    return try await vendors.update(id: id, with: updates, on: req.db)
+  }
+
+  @Sendable
+  func delete(req: Request) async throws -> HTTPStatus {
+    guard let id = req.parameters.get("id", as: Vendor.IDValue.self) else {
+      throw Abort(.badRequest, reason: "Vendor id not provided.")
+    }
+    try await vendors.delete(id: id, on: req.db)
+    return .ok
+  }
+}
+
+struct VendorsIndexQuery: Content {
+  let branches: Bool?
+}