WIP: Adds database field to delegate airflow to another room, adds select to room form.

Sources/Styleguide/Select.swift

@@ -0,0 +1,61 @@
+import Elementary
+import Foundation
+
+/// NOTE: This does not have the 'select' class added to it, because it's generally
+///       added to the label of the field.
+public struct Select<Label, Element>: HTML where Label: HTML {
+
+  let label: @Sendable (Element) -> Label
+  let value: @Sendable (Element) -> String
+  let selected: @Sendable (Element) -> Bool
+  let items: [Element]
+  let placeholder: String?
+
+  public init(
+    _ items: [Element],
+    placeholder: String? = nil,
+    value: @escaping @Sendable (Element) -> String,
+    selected: @escaping @Sendable (Element) -> Bool = { _ in false },
+    @HTMLBuilder label: @escaping @Sendable (Element) -> Label
+  ) {
+    self.label = label
+    self.items = items
+    self.placeholder = placeholder
+    self.selected = selected
+    self.value = value
+  }
+
+  public var body: some HTML<HTMLTag.select> {
+    select {
+      if let placeholder {
+        option(.selected, .disabled) { placeholder }
+      }
+      for item in items {
+        option(.value(value(item))) { label(item) }
+          .attributes(.selected, when: selected(item))
+      }
+    }
+  }
+}
+
+extension Select: Sendable where Element: Sendable, Label: Sendable {}
+
+extension Select where Element: Identifiable, Element.ID == UUID, Element: Sendable {
+
+  public init(
+    _ items: [Element],
+    placeholder: String? = nil,
+    selected: @escaping @Sendable (Element) -> Bool = { _ in false },
+    @HTMLBuilder label: @escaping @Sendable (Element) -> Label
+  ) {
+    self.init(
+      items,
+      placeholder: placeholder,
+      value: { $0.id.uuidString },
+      selected: selected,
+      label: label
+    )
+
+  }
+
+}