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Add alert and confirm modal system for tsunami apps (#2484)
## Alert and Confirm Modal System for Tsunami This PR implements a complete modal system for the tsunami app framework as specified in the requirements. ### Implementation Summary **Backend (Go) - 574 lines changed across 11 files:** 1. **Type Definitions** (`rpctypes/protocoltypes.go`): - `ModalConfig`: Configuration for modal display with icon, title, text, and button labels - `ModalResult`: Result structure containing modal ID and confirmation status 2. **Client State Management** (`engine/clientimpl.go`): - Added `ModalState` to track open modals with result channels - `OpenModals` map to track all currently open modals - `ShowModal()`: Sends SSE event to display modal and returns result channel - `CloseModal()`: Processes modal result from frontend - `CloseAllModals()`: Automatically cancels all modals when frontend sends Resync flag (page refresh) 3. **API Endpoint** (`engine/serverhandlers.go`): - `/api/modalresult` POST endpoint to receive modal results from frontend - Validates and processes `ModalResult` JSON payload - Closes all modals on Resync (page refresh) before processing events 4. **User-Facing Hooks** (`app/hooks.go`): - `UseAlertModal()`: Returns (isOpen, triggerAlert) for alert modals - `UseConfirmModal()`: Returns (isOpen, triggerConfirm) for confirm modals - Both hooks manage local state and handle async modal lifecycle **Frontend (TypeScript/React):** 1. **Type Definitions** (`types/vdom.d.ts`): - Added `ModalConfig` and `ModalResult` TypeScript types 2. **Modal Components** (`element/modals.tsx`): - `AlertModal`: Dark-mode styled alert with icon, title, text, and OK button - `ConfirmModal`: Dark-mode styled confirm with icon, title, text, OK and Cancel buttons - Both support keyboard (ESC) and backdrop click dismissal - Fully accessible with focus management 3. **Model Integration** (`model/tsunami-model.tsx`): - Added `currentModal` atom to track displayed modal - SSE event handler for `showmodal` events - `sendModalResult()`: Sends result to `/api/modalresult` and clears modal 4. **UI Integration** (`vdom.tsx`): - Integrated modal display in `VDomView` component - Conditionally renders alert or confirm modal based on type **Demo Application** (`demo/modaltest/`): - Comprehensive demonstration of modal functionality - Shows 4 different modal configurations: - Alert with icon - Simple alert with custom button text - Confirm modal - Delete confirmation with custom buttons - Displays modal state and results in real-time ### Key Features ✅ **SSE-Based Modal Display**: Modals are pushed from backend to frontend via SSE ✅ **API-Based Result Handling**: Results sent back via `/api/modalresult` endpoint ✅ **Automatic Cleanup**: All open modals auto-cancel on page refresh (when Resync flag is set) ✅ **Type-Safe Hooks**: Full TypeScript and Go type safety ✅ **Dark Mode UI**: Components styled for Wave Terminal's dark theme ✅ **Accessibility**: Keyboard navigation, ESC to dismiss, backdrop click support ✅ **Zero Security Issues**: Passed CodeQL security analysis ✅ **Zero Code Review Issues**: Clean implementation following best practices ### Testing - ✅ Go code compiles without errors - ✅ TypeScript/React builds without errors - ✅ All existing tests pass - ✅ Demo app created and compiles successfully - ✅ CodeQL security scan: 0 vulnerabilities - ✅ Code review: 0 issues ### Security Summary No security vulnerabilities were introduced. All modal operations are properly scoped to the client's SSE connection, and modal IDs are generated server-side to prevent tampering. Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: sawka <2722291+sawka@users.noreply.github.com>
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‎tsunami/app/hooks.go‎

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@@ -6,9 +6,12 @@ package app
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import (
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"context"
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"fmt"
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"log"
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"time"
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"github.com/google/uuid"
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"github.com/wavetermdev/waveterm/tsunami/engine"
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"github.com/wavetermdev/waveterm/tsunami/rpctypes"
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"github.com/wavetermdev/waveterm/tsunami/util"
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"github.com/wavetermdev/waveterm/tsunami/vdom"
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)
@@ -186,3 +189,113 @@ func UseAfter(duration time.Duration, timeoutFn func(), deps []any) {
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}
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}, deps)
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}
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// ModalConfig contains all configuration options for modals
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type ModalConfig struct {
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Icon string `json:"icon,omitempty"` // Optional icon to display (emoji or icon name)
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Title string `json:"title"` // Modal title
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Text string `json:"text,omitempty"` // Optional body text
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OkText string `json:"oktext,omitempty"` // Optional OK button text (defaults to "OK")
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CancelText string `json:"canceltext,omitempty"` // Optional Cancel button text for confirm modals (defaults to "Cancel")
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OnClose func() `json:"-"` // Optional callback for alert modals when dismissed
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OnResult func(bool) `json:"-"` // Optional callback for confirm modals with the result (true = confirmed, false = cancelled)
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}
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// UseAlertModal returns a boolean indicating if the modal is open and a function to trigger it
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func UseAlertModal() (modalOpen bool, triggerAlert func(config ModalConfig)) {
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isOpen := UseLocal(false)
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trigger := func(config ModalConfig) {
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if isOpen.Get() {
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log.Printf("warning: UseAlertModal trigger called while modal is already open")
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if config.OnClose != nil {
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go func() {
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defer func() {
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util.PanicHandler("UseAlertModal callback goroutine", recover())
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}()
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time.Sleep(10 * time.Millisecond)
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config.OnClose()
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}()
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}
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return
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}
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isOpen.Set(true)
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// Create modal config for backend
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modalId := uuid.New().String()
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backendConfig := rpctypes.ModalConfig{
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ModalId: modalId,
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ModalType: "alert",
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Icon: config.Icon,
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Title: config.Title,
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Text: config.Text,
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OkText: config.OkText,
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CancelText: config.CancelText,
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}
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// Show modal and wait for result in a goroutine
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go func() {
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defer func() {
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util.PanicHandler("UseAlertModal goroutine", recover())
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}()
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resultChan := engine.GetDefaultClient().ShowModal(backendConfig)
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<-resultChan // Wait for result (always dismissed for alerts)
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isOpen.Set(false)
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if config.OnClose != nil {
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config.OnClose()
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}
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}()
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}
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return isOpen.Get(), trigger
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}
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// UseConfirmModal returns a boolean indicating if the modal is open and a function to trigger it
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func UseConfirmModal() (modalOpen bool, triggerConfirm func(config ModalConfig)) {
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isOpen := UseLocal(false)
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trigger := func(config ModalConfig) {
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if isOpen.Get() {
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log.Printf("warning: UseConfirmModal trigger called while modal is already open")
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if config.OnResult != nil {
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go func() {
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defer func() {
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util.PanicHandler("UseConfirmModal callback goroutine", recover())
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}()
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time.Sleep(10 * time.Millisecond)
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config.OnResult(false)
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}()
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}
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return
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}
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isOpen.Set(true)
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// Create modal config for backend
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modalId := uuid.New().String()
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backendConfig := rpctypes.ModalConfig{
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ModalId: modalId,
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ModalType: "confirm",
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Icon: config.Icon,
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Title: config.Title,
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Text: config.Text,
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OkText: config.OkText,
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CancelText: config.CancelText,
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}
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// Show modal and wait for result in a goroutine
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go func() {
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defer func() {
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util.PanicHandler("UseConfirmModal goroutine", recover())
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}()
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resultChan := engine.GetDefaultClient().ShowModal(backendConfig)
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result := <-resultChan
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isOpen.Set(false)
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if config.OnResult != nil {
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config.OnResult(result)
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}
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}()
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}
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return isOpen.Get(), trigger
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}
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‎tsunami/demo/modaltest/app.go‎

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package main
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import (
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"github.com/wavetermdev/waveterm/tsunami/app"
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"github.com/wavetermdev/waveterm/tsunami/vdom"
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)
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const AppTitle = "Modal Test (Tsunami Demo)"
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const AppShortDesc = "Test alert and confirm modals in Tsunami"
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var App = app.DefineComponent("App", func(_ struct{}) any {
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// State to track modal results
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alertResult := app.UseLocal("")
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confirmResult := app.UseLocal("")
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// Hook for alert modal
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alertOpen, triggerAlert := app.UseAlertModal()
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// Hook for confirm modal
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confirmOpen, triggerConfirm := app.UseConfirmModal()
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// Event handlers for alert
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handleShowAlert := func() {
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triggerAlert(app.ModalConfig{
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Icon: "⚠️",
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Title: "Alert Message",
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Text: "This is an alert modal. Click OK to dismiss.",
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OnClose: func() {
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alertResult.Set("Alert dismissed")
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},
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})
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}
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handleShowAlertSimple := func() {
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triggerAlert(app.ModalConfig{
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Title: "Simple Alert",
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Text: "This alert has no icon and custom OK text.",
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OkText: "Got it!",
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OnClose: func() {
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alertResult.Set("Simple alert dismissed")
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},
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})
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}
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// Event handlers for confirm
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handleShowConfirm := func() {
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triggerConfirm(app.ModalConfig{
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Icon: "❓",
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Title: "Confirm Action",
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Text: "Do you want to proceed with this action?",
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OnResult: func(confirmed bool) {
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if confirmed {
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confirmResult.Set("User confirmed the action")
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} else {
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confirmResult.Set("User cancelled the action")
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}
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},
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})
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}
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handleShowConfirmCustom := func() {
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triggerConfirm(app.ModalConfig{
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Icon: "🗑️",
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Title: "Delete Item",
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Text: "Are you sure you want to delete this item? This action cannot be undone.",
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OkText: "Delete",
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CancelText: "Keep",
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OnResult: func(confirmed bool) {
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if confirmed {
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confirmResult.Set("Item deleted")
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} else {
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confirmResult.Set("Item kept")
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}
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},
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})
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}
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// Read state values
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currentAlertResult := alertResult.Get()
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currentConfirmResult := confirmResult.Get()
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return vdom.H("div", map[string]any{
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"className": "max-w-4xl mx-auto p-8",
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},
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vdom.H("h1", map[string]any{
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"className": "text-3xl font-bold mb-6 text-white",
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}, "Tsunami Modal Test"),
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// Alert Modal Section
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vdom.H("div", map[string]any{
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"className": "mb-8 p-6 bg-gray-800 rounded-lg border border-gray-700",
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},
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vdom.H("h2", map[string]any{
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"className": "text-2xl font-semibold mb-4 text-white",
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}, "Alert Modals"),
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vdom.H("div", map[string]any{
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"className": "flex gap-4 mb-4",
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},
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vdom.H("button", map[string]any{
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"className": "px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed",
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"onClick": handleShowAlert,
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"disabled": alertOpen,
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}, "Show Alert with Icon"),
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vdom.H("button", map[string]any{
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"className": "px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed",
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"onClick": handleShowAlertSimple,
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"disabled": alertOpen,
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}, "Show Simple Alert"),
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),
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vdom.If(currentAlertResult != "", vdom.H("div", map[string]any{
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"className": "mt-4 p-3 bg-gray-700 rounded text-gray-200",
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}, "Result: ", currentAlertResult)),
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),
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// Confirm Modal Section
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vdom.H("div", map[string]any{
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"className": "mb-8 p-6 bg-gray-800 rounded-lg border border-gray-700",
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},
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vdom.H("h2", map[string]any{
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"className": "text-2xl font-semibold mb-4 text-white",
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}, "Confirm Modals"),
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vdom.H("div", map[string]any{
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"className": "flex gap-4 mb-4",
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},
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vdom.H("button", map[string]any{
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"className": "px-4 py-2 bg-green-600 text-white rounded hover:bg-green-700 disabled:opacity-50 disabled:cursor-not-allowed",
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"onClick": handleShowConfirm,
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"disabled": confirmOpen,
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}, "Show Confirm Modal"),
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vdom.H("button", map[string]any{
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"className": "px-4 py-2 bg-red-600 text-white rounded hover:bg-red-700 disabled:opacity-50 disabled:cursor-not-allowed",
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"onClick": handleShowConfirmCustom,
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"disabled": confirmOpen,
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}, "Show Delete Confirm"),
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),
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vdom.If(currentConfirmResult != "", vdom.H("div", map[string]any{
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"className": "mt-4 p-3 bg-gray-700 rounded text-gray-200",
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}, "Result: ", currentConfirmResult)),
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),
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// Status info
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vdom.H("div", map[string]any{
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"className": "p-6 bg-gray-800 rounded-lg border border-gray-700",
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},
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vdom.H("h2", map[string]any{
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"className": "text-2xl font-semibold mb-4 text-white",
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}, "Modal Status"),
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vdom.H("div", map[string]any{
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"className": "text-gray-300",
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},
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vdom.H("div", nil, "Alert Modal Open: ", vdom.IfElse(alertOpen, "Yes", "No")),
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vdom.H("div", nil, "Confirm Modal Open: ", vdom.IfElse(confirmOpen, "Yes", "No")),
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),
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),
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)
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})

‎tsunami/demo/modaltest/go.mod‎

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module github.com/wavetermdev/waveterm/tsunami/demo/modaltest
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go 1.24.6
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require github.com/wavetermdev/waveterm/tsunami v0.0.0-00010101000000-000000000000
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require (
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github.com/google/uuid v1.6.0 // indirect
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github.com/outrigdev/goid v0.3.0 // indirect
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)
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replace github.com/wavetermdev/waveterm/tsunami => /Users/mike/work/waveterm/tsunami

‎tsunami/demo/modaltest/go.sum‎

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github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
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github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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github.com/outrigdev/goid v0.3.0 h1:t/otQD3EXc45cLtQVPUnNgEyRaTQA4cPeu3qVcrsIws=
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github.com/outrigdev/goid v0.3.0/go.mod h1:hEH7f27ypN/GHWt/7gvkRoFYR0LZizfUBIAbak4neVE=

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