main.go

/*
MIT License

Copyright (c) [2018] [Nitish Malhotra]

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
package main

import (
	"fmt"
	redisapi "redis-terminal/redis-api"
	"strings"

	"github.com/gdamore/tcell"
	"github.com/renstrom/fuzzysearch/fuzzy"
	"github.com/rivo/tview"
)

var (
	app            *tview.Application
	keyList        *tview.List
	keyFilter      *tview.InputField
	previewText    *tview.TextView
	keyFlexBox     *tview.Flex
	previewFlexBox *tview.Flex
	viewFlexBox    *tview.Flex
	editForm       *tview.Form
)

func main() {
	r, err := redisapi.NewRedis("localhost:6379")
	if err != nil {
		panic(err)
	}

	app = tview.NewApplication()

	pages := tview.NewPages()
	// Main page primitives
	// Components
	keyList = tview.NewList()
	keyFilter = tview.NewInputField()
	previewText = tview.NewTextView()

	// Flex boxes
	keyFlexBox = tview.NewFlex()
	previewFlexBox = tview.NewFlex()

	keyList.
		ShowSecondaryText(false).
		SetTitle("KEYS").
		SetBorder(true).
		SetBorderColor(tcell.ColorSteelBlue)

	keyFilter.
		SetFieldBackgroundColor(tcell.ColorGhostWhite).
		SetFieldTextColor(tcell.ColorBlack)

	previewText.
		SetDynamicColors(true).
		SetRegions(true).
		SetScrollable(true).
		SetTitle("PREVIEW").
		SetBorder(true).
		SetBorderColor(tcell.ColorSteelBlue)

	keyFlexBox.
		SetDirection(tview.FlexRow)
	previewFlexBox.
		SetDirection(tview.FlexRow)

	viewFlexBox := tview.NewFlex().
		SetDirection(tview.FlexColumn).
		AddItem(keyFlexBox, 0, 1, true).
		AddItem(previewFlexBox, 0, 4, false)

	pages.AddPage("main", viewFlexBox, true, true)

	// Edit Page primitives
	// Components
	editForm = tview.NewForm()
	editForm.
		SetFieldBackgroundColor(tcell.ColorGray).
		SetFieldTextColor(tcell.ColorWhiteSmoke).
		SetTitle("EDIT").
		SetBorder(true).
		SetBorderColor(tcell.ColorSteelBlue)

	pages.AddPage("edit", editForm, true, false)

	keyFlexBox.AddItem(keyList, 0, 40, true)
	previewFlexBox.AddItem(previewText, 0, 10, false)

	populateKeys := func(pattern string, keys []string) {
		rKeys := []string{}
		keyList.Clear()
		if pattern != "" {
			rKeys, err = r.GetKeys(pattern)
			if err != nil {
				return
			}
		} else {
			rKeys = keys
		}
		for _, k := range rKeys {
			keyList.AddItem(k, "", 0, nil)
		}
	}

	populateEditForm := func(key string) {
		v, err := r.GetValue(key)
		if err != nil {
			return
		}

		switch res := v.(type) {
		case map[string]string:
			for key, value := range res {
				editForm.AddInputField(key, value, len(value)+1, nil, nil)
			}
			break
		case []string:
			break
		case string:
			editForm.AddInputField("", res, len(res)+1, nil, nil)
			break
		default:
			fmt.Printf("Type not supported")
			break
		}
		editForm.
			AddButton("Save", func() {
				pages.SwitchToPage("main")
			}).
			AddButton("Quit", func() {
				pages.SwitchToPage("main")
			}).
			SetButtonBackgroundColor(tcell.ColorSteelBlue).
			SetButtonTextColor(tcell.ColorWhiteSmoke).
			SetButtonsAlign(tview.AlignCenter)
	}

	keyList.SetChangedFunc(func(i int, main string, sec string, sc rune) {
		v, err := redisapi.PrintKey(r, main)
		if err != nil {
			return
		}

		t, err := r.GetType(main)
		if err != nil {
			return
		}

		keyTextBox := fmt.Sprintf("[red]KEY[yellow]: %s\n", main)
		typeTextBox := fmt.Sprintf("[red]TYPE[yellow]: %s\n", strings.ToUpper(t))
		valueTextBox := fmt.Sprintf("%s", v)
		preview := fmt.Sprintf("%s%s%s", keyTextBox, typeTextBox, valueTextBox)
		previewText.SetText(preview)
	})

	keyList.SetSelectedFunc(func(i int, main string, sec string, r rune) {
		editForm.Clear(true)
		populateEditForm(main)
		pages.SwitchToPage("edit")
	})

	keyFilter.SetFinishedFunc(func(key tcell.Key) {
		keys, err := r.GetKeys("*")
		if err != nil {
			return
		}
		res := fuzzy.Find(keyFilter.GetText(), keys)

		populateKeys("", res)
		keyFlexBox.RemoveItem(keyFilter)
		app.SetFocus(keyList)
	})

	editForm.SetCancelFunc(func() {
		populateKeys("*", nil)
		pages.SwitchToPage("main")
	})

	populateKeys("*", nil)

	app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
		switch event.Key() {
		case tcell.KeyCtrlF:
			if viewFlexBox.HasFocus() {
				if !keyFilter.HasFocus() {
					keyFlexBox.AddItem(keyFilter, 0, 1, false)
					keyFilter.SetText("")
					app.SetFocus(keyFilter)
				}
			}
		case tcell.KeyCtrlQ:
			app.Stop()
		}
		return event
	})

	if err := app.SetRoot(pages, true).Run(); err != nil {
		panic(err)
	}
}