Custom Struct

require("@gui")

// The 'users' global is our custom Go type (UserDatabase)
// It has methods defined in Go: add, get, list, count, delete

// Status label
let statusLabel = widget.NewLabel("User Database: 0 users")

// Update status function
let updateStatus = () => {
    let count = users.count()
    statusLabel.SetText(sprintf("User Database: %d users", count))
}

// Form for adding users
let nameEntry = widget.NewEntry()
nameEntry.PlaceHolder = "Name"

let emailEntry = widget.NewEntry()
emailEntry.PlaceHolder = "Email"

let ageEntry = widget.NewEntry()
ageEntry.PlaceHolder = "Age"

let addBtn = widget.NewButton("Add User", () => {
    let name = nameEntry.Text
    let email = emailEntry.Text
    let ageStr = ageEntry.Text

    if (name == "" || email == "" || ageStr == "") {
        statusLabel.SetText("Error: All fields required")
        return
    }

    let age = int(ageStr)

    // Call custom Go method
    users.add(name, email, age)

    nameEntry.SetText("")
    emailEntry.SetText("")
    ageEntry.SetText("")

    updateStatus()
})
addBtn.Importance = constants.ImportanceHigh

// List to display users
let userListLabel = widget.NewLabel("No users yet")

let refreshList = () => {
    let userList = users.list()

    if (len(userList) == 0) {
        userListLabel.SetText("No users yet")
        return
    }

    let text = ""
    userList.each(user => {
        text = text + sprintf("• %s (%s) - Age %d\n", user["name"], user["email"], user["age"])
    })

    userListLabel.SetText(text)
}

let refreshBtn = widget.NewButton("Refresh List", () => {
    refreshList()
    updateStatus()
})

// Search for specific user
let searchEntry = widget.NewEntry()
searchEntry.PlaceHolder = "Search by name"

let searchBtn = widget.NewButton("Search", () => {
    let name = searchEntry.Text
    if (name == "") {
        statusLabel.SetText("Enter a name to search")
        return
    }

    let user = users.get(name)
    if (user == nil) {
        statusLabel.SetText(sprintf("User '%s' not found", name))
    } else {
        statusLabel.SetText(sprintf("Found: %s (%s) - Age %d",
            user["name"], user["email"], user["age"]))
    }
})

// Delete user
let deleteEntry = widget.NewEntry()
deleteEntry.PlaceHolder = "Name to delete"

let deleteBtn = widget.NewButton("Delete User", () => {
    let name = deleteEntry.Text
    if (name == "") {
        statusLabel.SetText("Enter a name to delete")
        return
    }

    let deleted = users.delete(name)
    if (deleted) {
        statusLabel.SetText(sprintf("Deleted user: %s", name))
        deleteEntry.SetText("")
        refreshList()
        updateStatus()
    } else {
        statusLabel.SetText(sprintf("User '%s' not found", name))
    }
})
deleteBtn.Importance = constants.ImportanceLow

// Demo button to add sample data
let demoBtn = widget.NewButton("Add Demo Data", () => {
    users.add("Alice Smith", "alice@example.com", 28)
    users.add("Bob Johnson", "bob@example.com", 35)
    users.add("Charlie Brown", "charlie@example.com", 42)

    refreshList()
    updateStatus()
})

// Info section
let infoLabel = widget.NewLabel(`Custom Go Type Demo:

This example shows how to expose custom Go types
to Risor scripts as global variables.

The 'users' global is a UserDatabase struct implemented
in Go with methods like add(), get(), list(), count(),
and delete() that are callable from scripts.

Try:
1. Click "Add Demo Data" to populate
2. Click "Refresh List" to see users
3. Search for a user by name
4. Delete users`)
infoLabel.Wrapping = constants.TextWrapWord

let layout = container.NewVBox(
    infoLabel,
    widget.NewSeparator(),
    statusLabel,
    widget.NewSeparator(),

    widget.NewLabel("Add User:"),
    nameEntry,
    emailEntry,
    ageEntry,
    addBtn,
    widget.NewSeparator(),

    widget.NewLabel("Search User:"),
    container.NewHBox(searchEntry, searchBtn),
    widget.NewSeparator(),

    widget.NewLabel("Delete User:"),
    container.NewHBox(deleteEntry, deleteBtn),
    widget.NewSeparator(),

    container.NewHBox(demoBtn, refreshBtn),
    widget.NewSeparator(),

    widget.NewLabel("User List:"),
    userListLabel
)

window.SetContent(container.NewScroll(layout))

cd examples/28-custom-struct
go run main.go

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