Upsert Case

upsert-case — APIExample

When to Use

• Add: the feature has no existing case in Examples/Basic/ or Examples/Advanced/
• Modify: the case already exists — update the existing .swift and storyboard first, then check registration and docs

Before adding, search the Case Index in ARCHITECTURE.md to confirm the case does not already exist.

Files to Touch

Modify Existing Case

When repairing or rebuilding an existing case, use this order instead of the new-case flow:

1. Locate the existing .swift implementation and update the actual runtime logic first
2. Update the existing storyboard if scene wiring, outlets, actions, or controller identifiers changed
3. Check APIExample/ViewController.swift and fix the MenuItem only if registration or controller / storyboard wiring is wrong
4. Update ARCHITECTURE.md last if the case path, APIs, or description changed

Do not skip implementation edits just because the case folder already exists.

Step 1 — Create the Example Folder

APIExample/Examples/[Basic|Advanced]/<ExampleName>/

Use Basic/ for fundamental channel join demos, Advanced/ for everything else.

Step 2 — Create the Swift File

Create <ExampleName>.swift containing both Entry and Main classes:

import UIKit
import AgoraRtcKit

class <ExampleName>Entry: UIViewController {
    @IBOutlet weak var channelTextField: UITextField!

    @IBAction func onJoinPressed(_ sender: UIButton) {
        guard let channelName = channelTextField.text, !channelName.isEmpty else { return }
        let storyboard = UIStoryboard(name: "<ExampleName>", bundle: nil)
        guard let mainVC = storyboard.instantiateViewController(
            withIdentifier: "<ExampleName>") as? <ExampleName>Main else { return }
        mainVC.configs = ["channelName": channelName]
        navigationController?.pushViewController(mainVC, animated: true)
    }
}

class <ExampleName>Main: BaseViewController {
    var agoraKit: AgoraRtcEngineKit?

    override func viewDidLoad() {
        super.viewDidLoad()
        guard let channelName = configs["channelName"] as? String else { return }
        let config = AgoraRtcEngineConfig()
        config.appId = KeyCenter.AppId
        agoraKit = AgoraRtcEngineKit.sharedEngine(with: config, delegate: self)
        // configure engine, request permissions, then join
        NetworkManager.shared.generateToken(channelName: channelName) { [weak self] token in
            let option = AgoraRtcChannelMediaOptions()
            self?.agoraKit?.joinChannel(byToken: token, channelId: channelName,
                                        uid: 0, mediaOptions: option)
        }
    }

    override func willMove(toParent parent: UIViewController?) {
        super.willMove(toParent: parent)
        if parent == nil {
            agoraKit?.leaveChannel()
            AgoraRtcEngineKit.destroy()
        }
    }
}

extension <ExampleName>Main: AgoraRtcEngineDelegate {
    func rtcEngine(_ engine: AgoraRtcEngineKit, didJoinChannel channel: String,
                   withUid uid: UInt, elapsed: Int) {
        LogUtils.log(message: "Joined: \(channel) uid: \(uid)", level: .info)
    }

    func rtcEngine(_ engine: AgoraRtcEngineKit, didOccurError errorCode: AgoraErrorCode) {
        LogUtils.log(message: "Error: \(errorCode.rawValue)", level: .error)
    }
}

Step 3 — Create the Storyboard

Create APIExample/Examples/[Basic|Advanced]/<ExampleName>/Base.lproj/<ExampleName>.storyboard with two scenes:

Connect a Show segue or use the manual push in onJoinPressed.

Keep the storyboard inside the example folder. Do not place new case storyboards in the shared APIExample/Base.lproj/ directory.

Default Entry UI Convention

Unless the user explicitly asks for a different flow, use this default Entry layout and interaction:

• One channel input field (UITextField) with placeholder "Enter channel name".localized
• One join button (UIButton) with title "Join".localized
• Join action validates non-empty channel name, dismisses keyboard, and pushes Main VC
• Pass config via configs = ["channelName": channelName]

Rationale:

• This matches the dominant pattern used by existing APIExample cases
• Keeps new cases consistent with existing user interaction and navigation
• Minimizes refactor cost when RTC join logic is added later

Step 4 — Register the MenuItem

Add to the menus array in APIExample/ViewController.swift:

MenuItem(name: "<Display Name>".localized,
         storyboard: "<ExampleName>",
         controller: "<ExampleName>")

Place it in the correct section (Basic / Advanced).

Step 5 — Update the Case Index

Add a row to the ## Case Index table in ARCHITECTURE.md:

| <ExampleName> | `Examples/[Basic|Advanced]/<ExampleName>/<ExampleName>.swift` | `keyApi1()`, `keyApi2()` | One-line description |

Key APIs: list 2–5 core SDK methods the case demonstrates. Do not list joinChannel, leaveChannel, destroy, or sharedEngine unless they are the primary focus.

Verification Checklist

• Folder created under correct category (Basic / Advanced)
• Both Entry and Main classes exist in the Swift file
• Main inherits BaseViewController
• Storyboard has correct scene IDs
• Entry scene follows default UI convention (channel input + Join button), unless the user requested otherwise
• MenuItem added to ViewController.swift
• leaveChannel() + AgoraRtcEngineKit.destroy() called in willMove(toParent:) when parent == nil
• UI updates inside delegate callbacks dispatched to DispatchQueue.main
• Camera/microphone permissions requested before joinChannel()
• Case Index row added/updated in ARCHITECTURE.md
• Project builds without errors

NEVER

• NEVER create AgoraRtcEngineKit in the Entry VC
• NEVER call leaveChannel or destroy in viewDidDisappear — use willMove(toParent:) with parent == nil
• NEVER update UI directly inside AgoraRtcEngineDelegate callbacks — always DispatchQueue.main.async { }
• NEVER add a new scene to Main.storyboard — each case must have its own .storyboard file
• NEVER share an AgoraRtcEngineKit instance between cases
• NEVER call joinChannel before requesting camera/microphone permissions
• NEVER skip updating the Case Index in ARCHITECTURE.md