Add prefetch functionality for paginator

flytectl/cmd/get/execution.go

@@ -115,12 +115,12 @@
 }
 
 func getCallBack(ctx context.Context, cmdCtx cmdCore.CommandContext) bubbletea.DataCallback {
-	return func(filter filters.Filters) []proto.Message {
+	return func(filter filters.Filters) ([]proto.Message, error) {
 		executionList, err := cmdCtx.AdminFetcherExt().ListExecution(ctx, config.GetConfig().Project, config.GetConfig().Domain, filter)
 		if err != nil {
-			return nil
+			return nil, err
 		}
-		return ExecutionToProtoMessages(executionList.Executions)
+		return ExecutionToProtoMessages(executionList.Executions), nil
 	}
 }
 
@@ -154,17 +154,15 @@
 		return adminPrinter.Print(config.GetConfig().MustOutputFormat(), executionColumns,
 			ExecutionToProtoMessages(executions)...)
 	}
+	if config.GetConfig().Interactive {
+		err := bubbletea.Paginator(executionColumns, getCallBack(ctx, cmdCtx), execution.DefaultConfig.Filter)
+		return err
+	}
 	executionList, err := cmdCtx.AdminFetcherExt().ListExecution(ctx, config.GetConfig().Project, config.GetConfig().Domain, execution.DefaultConfig.Filter)
 	if err != nil {
 		return err
 	}
 	logger.Infof(ctx, "Retrieved %v executions", len(executionList.Executions))
-
-	if config.GetConfig().Interactive {
-		bubbletea.Paginator(executionColumns, getCallBack(ctx, cmdCtx))
-		return nil
-	}
-
 	return adminPrinter.Print(config.GetConfig().MustOutputFormat(), executionColumns,
 		ExecutionToProtoMessages(executionList.Executions)...)
 }

flytectl/go.mod

@@ -67,6 +67,7 @@ require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/charmbracelet/lipgloss v0.10.0 // indirect
 	github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 // indirect
 	github.com/containerd/containerd v1.6.26 // indirect
 	github.com/containerd/log v0.1.0 // indirect

flytectl/go.sum

@@ -153,6 +153,8 @@ github.com/charmbracelet/bubbles v0.18.0 h1:PYv1A036luoBGroX6VWjQIE9Syf2Wby2oOl/
 github.com/charmbracelet/bubbles v0.18.0/go.mod h1:08qhZhtIwzgrtBjAcJnij1t1H0ZRjwHyGsy6AL11PSw=
 github.com/charmbracelet/bubbletea v0.25.0 h1:bAfwk7jRz7FKFl9RzlIULPkStffg5k6pNt5dywy4TcM=
 github.com/charmbracelet/bubbletea v0.25.0/go.mod h1:EN3QDR1T5ZdWmdfDzYcqOCAps45+QIJbLOBxmVNWNNg=
+github.com/charmbracelet/lipgloss v0.10.0 h1:KWeXFSexGcfahHX+54URiZGkBFazf70JNMtwg/AFW3s=
+github.com/charmbracelet/lipgloss v0.10.0/go.mod h1:Wig9DSfvANsxqkRsqj6x87irdy123SR4dOXlKa91ciE=
 github.com/checkpoint-restore/go-criu/v4 v4.1.0/go.mod h1:xUQBLp4RLc5zJtWY++yjOoMoB5lihDt7fai+75m+rGw=
 github.com/checkpoint-restore/go-criu/v5 v5.0.0/go.mod h1:cfwC0EG7HMUenopBsUf9d89JlCLQIfgVcNsNN0t6T2M=
 github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927 h1:SKI1/fuSdodxmNNyVBR8d7X/HuLnRpvvFO0AgyQk764=

flytectl/pkg/bubbletea/bubbletea_pagination.go

@@ -3,72 +3,175 @@ package bubbletea
 import (
 	"fmt"
 	"log"
+	"math"
 	"strings"
 
+	"github.com/charmbracelet/bubbles/key"
 	"github.com/charmbracelet/bubbles/paginator"
+	"github.com/charmbracelet/bubbles/spinner"
+	"github.com/charmbracelet/lipgloss"
+	"github.com/flyteorg/flyte/flytectl/pkg/filters"
 	"github.com/flyteorg/flyte/flytectl/pkg/printer"
 	"github.com/golang/protobuf/proto"
 
 	tea "github.com/charmbracelet/bubbletea"
 )
 
+var (
+	spin = false
+	// Avoid fetching multiple times while still fetching
+	fetchingBackward = false
+	fetchingForward  = false
+)
+
 type pageModel struct {
-	items     []proto.Message
+	items     *[]proto.Message
 	paginator paginator.Model
+	spinner   spinner.Model
 }
 
 func newModel(initMsg []proto.Message) pageModel {
 	p := paginator.New()
 	p.PerPage = msgPerPage
-	p.SetTotalPages(len(initMsg))
+	p.Page = int(filter.Page) - 1
+	// Set the upper bound of the page number
+	p.SetTotalPages(getLastMsgIdx())
+
+	s := spinner.New()
+	s.Style = lipgloss.NewStyle().Foreground(lipgloss.Color("56"))
+	s.Spinner = spinner.Points
 
 	return pageModel{
 		paginator: p,
-		items:     initMsg,
+		spinner:   s,
+		items:     &initMsg,
 	}
 }
 
 func (m pageModel) Init() tea.Cmd {
-	return nil
+	return m.spinner.Tick
 }
 
 func (m pageModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	var cmd tea.Cmd
 	switch msg := msg.(type) {
+	case error:
+		return m, tea.Quit
 	case tea.KeyMsg:
 		switch msg.String() {
 		case "q", "esc", "ctrl+c":
 			return m, tea.Quit
 		}
+		switch {
+		case key.Matches(msg, m.paginator.KeyMap.PrevPage):
+			// If previous page will be out of the range of the first batch, don't update
+			if m.paginator.Page == firstBatchIndex*pagePerBatch {
+				return m, nil
+			}
+		}
+	case spinner.TickMsg:
+		m.spinner, cmd = m.spinner.Update(msg)
+		return m, cmd
+	case newDataMsg:
+		if msg.fetchDirection == forward {
+			// Update if current page is in the range of the last batch
+			// i.e. if user not in last batch when finished fetching, don't update
+			if m.paginator.Page/pagePerBatch >= lastBatchIndex {
+				*m.items = append(*m.items, msg.newItems...)
+				lastBatchIndex++
+				if lastBatchIndex-firstBatchIndex >= localBatchLimit {
+					*m.items = (*m.items)[batchLen[firstBatchIndex]:]
+					firstBatchIndex++
+				}
+			}
+			fetchingForward = false
+		} else {
+			// Update if current page is in the range of the first batch
+			// i.e. if user not in first batch when finished fetching, don't update
+			if m.paginator.Page/pagePerBatch <= firstBatchIndex {
+				*m.items = append(msg.newItems, *m.items...)
+				firstBatchIndex--
+				if lastBatchIndex-firstBatchIndex >= localBatchLimit {
+					*m.items = (*m.items)[:len(*m.items)-batchLen[lastBatchIndex]]
+					lastBatchIndex--
+				}
+			}
+			fetchingBackward = false
+		}
+		// Set the upper bound of the page number
+		m.paginator.SetTotalPages(getLastMsgIdx())
+		return m, nil
 	}
-	m.paginator, cmd = m.paginator.Update(msg)
-	preFetchBatch(&m)
+
+	m.paginator, _ = m.paginator.Update(msg)
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch {
+		case key.Matches(msg, m.paginator.KeyMap.NextPage):
+			if (m.paginator.Page >= (lastBatchIndex+1)*pagePerBatch-prefetchThreshold) && !fetchingForward {
+				// If no more data, don't fetch again (won't show spinner)
+				value, ok := batchLen[lastBatchIndex+1]
+				if !ok || value != 0 {
+					fetchingForward = true
+					cmd = fetchDataCmd(lastBatchIndex+1, forward)
+				}
+			}
+		case key.Matches(msg, m.paginator.KeyMap.PrevPage):
+			if (m.paginator.Page <= firstBatchIndex*pagePerBatch+prefetchThreshold) && (firstBatchIndex > 0) && !fetchingBackward {
+				fetchingBackward = true
+				cmd = fetchDataCmd(firstBatchIndex-1, backward)
+			}
+		}
+	}
+
 	return m, cmd
 }
 
 func (m pageModel) View() string {
 	var b strings.Builder
 	table, err := getTable(&m)
 	if err != nil {
-		return ""
+		return "Error rendering table"
 	}
 	b.WriteString(table)
-	b.WriteString(fmt.Sprintf("  PAGE - %d\n", m.paginator.Page+1))
+	b.WriteString(fmt.Sprintf("  PAGE - %d   ", m.paginator.Page+1))
+	if spin {
+		b.WriteString(fmt.Sprintf("%s%s", m.spinner.View(), " Loading new pages..."))
+	}
 	b.WriteString("\n\n  h/l ←/→ page • q: quit\n")
+
 	return b.String()
 }
 
-func Paginator(_listHeader []printer.Column, _callback DataCallback) {
+func Paginator(_listHeader []printer.Column, _callback DataCallback, _filter filters.Filters) error {
 	listHeader = _listHeader
 	callback = _callback
+	filter = _filter
+	filter.Page = int32(_max(int(filter.Page), 1))
+	firstBatchIndex = (int(filter.Page) - 1) / pagePerBatch
+	lastBatchIndex = firstBatchIndex
 
 	var msg []proto.Message
 	for i := firstBatchIndex; i < lastBatchIndex+1; i++ {
-		msg = append(msg, getMessageList(i)...)
+		newMessages, err := getMessageList(i)
+		if err != nil {
+			return err
+		}
+		if int(filter.Page)-(firstBatchIndex*pagePerBatch) > int(math.Ceil(float64(len(newMessages))/msgPerPage)) {
+			return fmt.Errorf("the specified page has no data, please enter a valid page number")
+		}
+		msg = append(msg, newMessages...)
 	}
 
 	p := tea.NewProgram(newModel(msg))
 	if _, err := p.Run(); err != nil {
 		log.Fatal(err)
 	}
+
+	if errMsg != nil {
+		return errMsg
+	}
+
+	return nil
 }