mirror of
https://github.com/postmannen/ctrl.git
synced 2024-12-14 12:37:31 +00:00
482 lines
13 KiB
Go
482 lines
13 KiB
Go
package steward
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"reflect"
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"strconv"
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"strings"
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"time"
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"github.com/gdamore/tcell/v2"
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"github.com/rivo/tview"
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)
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type tui struct {
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}
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func newTui() (*tui, error) {
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s := tui{}
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return &s, nil
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}
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type slide struct {
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name string
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key tcell.Key
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primitive tview.Primitive
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}
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func (s *tui) Start() error {
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pages := tview.NewPages()
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app := tview.NewApplication()
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app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
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if event.Key() == tcell.KeyF1 {
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pages.SwitchToPage("info")
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return nil
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} else if event.Key() == tcell.KeyF2 {
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pages.SwitchToPage("message")
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return nil
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}
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return event
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})
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info := tview.NewTextView().
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SetDynamicColors(true).
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SetRegions(true).
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SetWrap(false)
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// The slides to draw, and their name.
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// NB: This slice is being looped over further below, to create the menu
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// elements. If adding a new slide, make sure that slides are ordered in
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// chronological order, so we can auto generate the info menu with it's
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// corresponding F key based on the slice index+1.
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slides := []slide{
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{name: "message", key: tcell.KeyF2, primitive: messageSlide(app)},
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{name: "info", key: tcell.KeyF1, primitive: infoSlide(app)},
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}
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// Add on page for each slide.
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for i, v := range slides {
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if i == 0 {
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pages.AddPage(v.name, v.primitive, true, true)
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fmt.Fprintf(info, " F%v:%v ", i+1, v.name)
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continue
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}
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pages.AddPage(v.name, v.primitive, true, false)
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fmt.Fprintf(info, " F%v:%v ", i+1, v.name)
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}
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// Create the main layout.
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layout := tview.NewFlex()
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//layout.SetBorder(true)
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layout.SetDirection(tview.FlexRow).
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AddItem(pages, 0, 10, true).
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AddItem(info, 1, 1, false)
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root := app.SetRoot(layout, true)
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root.EnableMouse(true)
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if err := root.Run(); err != nil {
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log.Printf("error: root.Run(): %v\n", err)
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os.Exit(1)
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}
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return nil
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}
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func infoSlide(app *tview.Application) tview.Primitive {
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flex := tview.NewFlex()
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flex.SetTitle("info")
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flex.SetBorder(true)
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textView := tview.NewTextView()
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flex.AddItem(textView, 0, 1, false)
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fmt.Fprintf(textView, "Information page for Stew.\n")
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return flex
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}
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func messageSlide(app *tview.Application) tview.Primitive {
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type pageMessage struct {
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flex *tview.Flex
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msgInputForm *tview.Form
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msgOutputForm *tview.TextView
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logForm *tview.TextView
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}
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p := pageMessage{}
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app = tview.NewApplication()
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p.msgInputForm = tview.NewForm()
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p.msgInputForm.SetBorder(true).SetTitle("Request values").SetTitleAlign(tview.AlignLeft)
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p.msgOutputForm = tview.NewTextView()
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p.msgOutputForm.SetBorder(true).SetTitle("Message output").SetTitleAlign(tview.AlignLeft)
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p.msgOutputForm.SetChangedFunc(func() {
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// Will cause the log window to be redrawn as soon as
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// new output are detected.
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app.Draw()
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})
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p.logForm = tview.NewTextView()
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p.logForm.SetBorder(true).SetTitle("Log/Status").SetTitleAlign(tview.AlignLeft)
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p.logForm.SetChangedFunc(func() {
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// Will cause the log window to be redrawn as soon as
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// new output are detected.
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app.Draw()
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})
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// Create a flex layout.
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//
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// First create the outer flex layout.
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p.flex = tview.NewFlex().SetDirection(tview.FlexRow).
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// Add the top windows with columns.
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AddItem(tview.NewFlex().SetDirection(tview.FlexColumn).
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AddItem(p.msgInputForm, 0, 10, false).
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AddItem(p.msgOutputForm, 0, 10, false),
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0, 10, false).
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// Add the bottom log window.
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AddItem(tview.NewFlex().
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AddItem(p.logForm, 0, 2, false),
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0, 2, false)
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m := tuiMessage{}
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// Draw all the message input field with values on the screen.
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//
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// Loop trough all the fields of the Message struct, and create
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// a an input field or dropdown selector for each field.
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// If a field of the struct is not defined below, it will be
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// created a "no defenition" element, so it we can easily spot
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// Message fields who miss an item in the form.
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//
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// INFO: The reason that reflect are being used here is to have
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// a simple way of detecting that we are creating form fields
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// for all the fields in the struct. If we have forgot'en one
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// it will create a "no case" field in the console, to easily
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// detect that a struct field are missing a defenition below.
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mRefVal := reflect.ValueOf(m)
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for i := 0; i < mRefVal.NumField(); i++ {
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fieldName := mRefVal.Type().Field(i).Name
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switch fieldName {
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case "_":
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case "ToNode":
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// Get nodes from file.
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values, err := getNodeNames("nodeslist.cfg")
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if err != nil {
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log.Printf("error: unable to open file: %v\n", err)
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}
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item := tview.NewDropDown()
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item.SetLabelColor(tcell.ColorIndianRed)
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item.SetLabel(fieldName).SetOptions(values, nil)
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p.msgInputForm.AddFormItem(item)
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//c.msgForm.AddDropDown(mRefVal.Type().Field(i).Name, values, 0, nil).SetItemPadding(1)
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case "ToNodes":
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value := `"ship1","ship2","ship3"`
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p.msgInputForm.AddInputField(fieldName, value, 30, nil, nil)
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case "Method":
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var m Method
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ma := m.GetMethodsAvailable()
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values := []string{}
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for k := range ma.Methodhandlers {
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values = append(values, string(k))
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}
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p.msgInputForm.AddDropDown(fieldName, values, 0, nil).SetItemPadding(1)
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case "MethodArgs":
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value := ``
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p.msgInputForm.AddInputField(fieldName, value, 30, nil, nil)
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case "ReplyMethod":
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var m Method
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rm := m.GetReplyMethods()
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values := []string{}
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for _, k := range rm {
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values = append(values, string(k))
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}
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p.msgInputForm.AddDropDown(fieldName, values, 0, nil).SetItemPadding(1)
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case "ReplyMethodArgs":
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value := ``
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p.msgInputForm.AddInputField(fieldName, value, 30, nil, nil)
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case "ACKTimeout":
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value := 30
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p.msgInputForm.AddInputField(fieldName, fmt.Sprintf("%d", value), 30, validateInteger, nil)
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case "Retries":
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value := 1
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p.msgInputForm.AddInputField(fieldName, fmt.Sprintf("%d", value), 30, validateInteger, nil)
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case "ReplyACKTimeout":
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value := 30
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p.msgInputForm.AddInputField(fieldName, fmt.Sprintf("%d", value), 30, validateInteger, nil)
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case "ReplyRetries":
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value := 1
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p.msgInputForm.AddInputField(fieldName, fmt.Sprintf("%d", value), 30, validateInteger, nil)
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case "MethodTimeout":
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value := 120
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p.msgInputForm.AddInputField(fieldName, fmt.Sprintf("%d", value), 30, validateInteger, nil)
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case "ReplyMethodTimeout":
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value := 120
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p.msgInputForm.AddInputField(fieldName, fmt.Sprintf("%d", value), 30, validateInteger, nil)
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case "Directory":
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value := "/some-dir/"
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p.msgInputForm.AddInputField(fieldName, value, 30, nil, nil)
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case "FileName":
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value := ".log"
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p.msgInputForm.AddInputField(fieldName, value, 30, nil, nil)
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case "RelayViaNode":
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// Get nodes from file.
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values, err := getNodeNames("nodeslist.cfg")
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if err != nil {
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log.Printf("error: unable to open file: %v\n", err)
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os.Exit(1)
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}
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item := tview.NewDropDown()
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item.SetLabelColor(tcell.ColorIndianRed)
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item.SetLabel(fieldName).SetOptions(values, nil)
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p.msgInputForm.AddFormItem(item)
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//c.msgForm.AddDropDown(mRefVal.Type().Field(i).Name, values, 0, nil).SetItemPadding(1)
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case "RelayReplyMethod":
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var m Method
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rm := m.GetReplyMethods()
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values := []string{}
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for _, k := range rm {
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values = append(values, string(k))
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}
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p.msgInputForm.AddDropDown(fieldName, values, 0, nil).SetItemPadding(1)
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default:
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// Add a no definition fields to the form if a a field within the
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// struct were missing an action above, so we can easily detect
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// if there is missing a case action for one of the struct fields.
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p.msgInputForm.AddDropDown("error: no case for: "+fieldName, []string{"1", "2"}, 0, nil).SetItemPadding(1)
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}
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}
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// Add Buttons below the message fields. Like Generate and Exit.
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p.msgInputForm.
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// Add a generate button, which when pressed will loop through all the
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// message form items, and if found fill the value into a msg struct,
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// and at last write it to a file.
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AddButton("generate to console", func() {
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p.msgOutputForm.Clear()
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fh := p.msgOutputForm
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m := tuiMessage{}
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// Loop trough all the form fields, check the value of each
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// form field, and add the value to m.
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for i := 0; i < p.msgInputForm.GetFormItemCount(); i++ {
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fi := p.msgInputForm.GetFormItem(i)
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label, value := getLabelAndValue(fi)
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switch label {
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case "ToNode":
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v := Node(value)
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m.ToNode = &v
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case "ToNodes":
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slice, err := stringToNode(value)
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if err != nil {
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fmt.Fprintf(p.logForm, "%v : error: ReplyMethodArgs missing or malformed format, should be \"arg0\",\"arg1\",\"arg2\", %v\n", time.Now().Format("Mon Jan _2 15:04:05 2006"), err)
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return
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}
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m.ToNodes = slice
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case "Method":
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v := Method(value)
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m.Method = &v
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case "MethodArgs":
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slice, err := stringToSlice(value)
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if err != nil {
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fmt.Fprintf(p.logForm, "%v : error: ReplyMethodArgs missing or malformed format, should be \"arg0\",\"arg1\",\"arg2\", %v\n", time.Now().Format("Mon Jan _2 15:04:05 2006"), err)
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return
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}
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m.MethodArgs = slice
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case "ReplyMethod":
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v := Method(value)
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m.ReplyMethod = &v
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case "ReplyMethodArgs":
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slice, err := stringToSlice(value)
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if err != nil {
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fmt.Fprintf(p.logForm, "%v : error: ReplyMethodArgs missing or malformed format, should be \"arg0\",\"arg1\",\"arg2\", %v\n", time.Now().Format("Mon Jan _2 15:04:05 2006"), err)
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return
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}
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m.ReplyMethodArgs = slice
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case "ACKTimeout":
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v, _ := strconv.Atoi(value)
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m.ACKTimeout = &v
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case "Retries":
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v, _ := strconv.Atoi(value)
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m.Retries = &v
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case "ReplyACKTimeout":
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v, _ := strconv.Atoi(value)
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m.ReplyACKTimeout = &v
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case "ReplyRetries":
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v, _ := strconv.Atoi(value)
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m.ReplyRetries = &v
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case "MethodTimeout":
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v, _ := strconv.Atoi(value)
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m.MethodTimeout = &v
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case "ReplyMethodTimeout":
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v, _ := strconv.Atoi(value)
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m.ReplyMethodTimeout = &v
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case "Directory":
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m.Directory = &value
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case "FileName":
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m.FileName = &value
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case "RelayViaNode":
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v := Node(value)
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m.RelayViaNode = &v
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case "RelayReplyMethod":
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v := Method(value)
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m.RelayReplyMethod = &v
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default:
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fmt.Fprintf(p.logForm, "%v : error: did not find case definition for how to handle the \"%v\" within the switch statement\n", time.Now().Format("Mon Jan _2 15:04:05 2006"), label)
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return
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}
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}
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msgs := []tuiMessage{}
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msgs = append(msgs, m)
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msgsIndented, err := json.MarshalIndent(msgs, "", " ")
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if err != nil {
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fmt.Fprintf(p.logForm, "%v : error: jsonIndent failed: %v\n", time.Now().Format("Mon Jan _2 15:04:05 2006"), err)
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}
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_, err = fh.Write(msgsIndented)
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if err != nil {
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fmt.Fprintf(p.logForm, "%v : error: write to fh failed: %v\n", time.Now().Format("Mon Jan _2 15:04:05 2006"), err)
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}
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}).
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// Add exit button.
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AddButton("exit", func() {
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app.Stop()
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})
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app.SetFocus(p.msgInputForm)
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return p.flex
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}
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// stringToSlice will Split the comma separated string
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// into a and remove the start and end ampersand.
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func stringToSlice(s string) (*[]string, error) {
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if s == "" {
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return nil, nil
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}
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var stringSlice []string
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sp := strings.Split(s, ",")
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for _, v := range sp {
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// Check if format is correct, return if not.
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pre := strings.HasPrefix(v, "\"")
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suf := strings.HasSuffix(v, "\"")
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if !pre || !suf {
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return nil, fmt.Errorf("stringToSlice: missing leading or ending ampersand")
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}
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// Remove leading and ending ampersand.
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v = v[1:]
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v = strings.TrimSuffix(v, "\"")
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stringSlice = append(stringSlice, v)
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}
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return &stringSlice, nil
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}
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// stringToNodes will Split the comma separated slice
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// of nodes, and remove the start and end ampersand.
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func stringToNode(s string) (*[]Node, error) {
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if s == "" {
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return nil, nil
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}
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var nodeSlice []Node
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sp := strings.Split(s, ",")
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for _, v := range sp {
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// Check if format is correct, return if not.
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pre := strings.HasPrefix(v, "\"")
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suf := strings.HasSuffix(v, "\"")
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if !pre || !suf {
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return nil, fmt.Errorf("stringToSlice: missing leading or ending ampersand")
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}
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// Remove leading and ending ampersand.
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v = v[1:]
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v = strings.TrimSuffix(v, "\"")
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nodeSlice = append(nodeSlice, Node(v))
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}
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return &nodeSlice, nil
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}
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// Will return the Label And the text Value of an input or dropdown form field.
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func getLabelAndValue(fi tview.FormItem) (string, string) {
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var label string
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var value string
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switch v := fi.(type) {
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case *tview.InputField:
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value = v.GetText()
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label = v.GetLabel()
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case *tview.DropDown:
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label = v.GetLabel()
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_, value = v.GetCurrentOption()
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}
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return label, value
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}
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// Check if number is int.
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func validateInteger(text string, ch rune) bool {
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if text == "-" {
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return true
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}
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_, err := strconv.Atoi(text)
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return err == nil
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}
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// getNodes will load all the node names from a file, and return a slice of
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// string values, each representing a unique node.
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func getNodeNames(fileName string) ([]string, error) {
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dirPath, err := os.Getwd()
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if err != nil {
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return nil, fmt.Errorf("error: tui: unable to get working directory: %v", err)
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}
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filePath := filepath.Join(dirPath, fileName)
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log.Printf(" * filepath : %v\n", filePath)
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fh, err := os.Open(filePath)
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if err != nil {
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return nil, fmt.Errorf("error: tui: you should create a file named nodeslist.cfg with all your nodes : %v", err)
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}
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defer fh.Close()
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nodes := []string{}
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scanner := bufio.NewScanner(fh)
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for scanner.Scan() {
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node := scanner.Text()
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nodes = append(nodes, node)
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}
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return nodes, nil
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}
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