Hands-On Server-Side Web Development with Swift

Using controller for logical operations

For simplicity, your myJournal application persists data in memory. You'll use database operations for permanent data storage later on.

Even though you are not using a database operation, you'll implement the typical Create, Read, Update, and Delete (CRUD) operations for your data. Create the JournalController.swift file in the /Sources/App/Controllers directory:

// Journal controllerimport Vaporfinal class JournalController {        var entries : Array<Entry> = Array() // [1]        //: Get total number of entries    func total() -> Int { // [2]        return entries.count    }    //: Create a new journal entry    func create(_ entry: Entry) -> Entry? { // [3]        entries.append(entry)        return entries.last    } //: Read a journal entry ...