Tracker API Poll

TrackerTests.swift

let tracker = Tracker()
// Which one do you prefer? Consider labels, indendentation, readability...
// 1 func trackEvent(_ event: Event, _ parameters: EventParameter...)
tracker.trackEvent(.viewItem,
                   .itemId("12345"),
                   .itemName("An Item"),
                   .list("List name"))

// 2. func track(event: Event, parameters: EventParameter...)
tracker.track(event: .viewItem, parameters:
    .itemId("12345"), // Xcode weird indent 這一行排版會歪掉
    .itemName("An Item"),
    .list("List name"))

// 3. func track(_ event: Event, parameters: [EventParameter]) { }
tracker.track(.viewItem, parameters: [
    .itemId("12345"),
    .itemName("An Item"),
    .list("List name")
    ])

// 4. func track(event: Event, _ parameters: EventParameter...) { }
tracker.track(event: .viewItem,
              .itemId("12345"),
              .itemName("An Item"),
              .list("List name"))

Function Builder 版本：

tracker.track(event: .viewItem) {
    .itemId("12345")
    .itemName("An Item")
    .list("List name")
}

tracker.event(.viewItem)
.itemId("12345")
.itemName("An Item")
.list("List name")
.track()

還是你要不要試試看 Java 風格？ XD

let builder = EventBuilder(. viewItem)
builder.itemId ="12345"
builder.itemName = "An Item"
builder.list = "List name"
tracker.trace(builder.build())

Builder Pattern 加上 Factory Pattern 更有味道。

let factory = EventFactory()
let builder = factory.event(. viewItem)
builder.itemId  ="12345"
builder.itemName = "An Item"
builder.list = "List name"
tracker.trace(builder.build())