client: application skeleton

.gitignore

@@ -19,3 +19,4 @@ markets.json
 dist/
 node_modules/
 package-lock.json
+client/cmd/dexc/dexc

client/cmd/dexc/go.mod

@@ -0,0 +1,27 @@
+module decred.org/dcrdex/client/cmd/dexc
+
+go 1.13
+
+replace (
+	decred.org/dcrdex => ../../../
+	github.com/ltcsuite/ltcutil => github.com/ltcsuite/ltcutil v0.0.0-20190507133322-23cdfa9fcc3d
+)
+
+require (
+	decred.org/dcrdex v0.0.0-00010101000000-000000000000
+	github.com/decred/dcrd/chaincfg/chainhash v1.0.2
+	github.com/decred/dcrd/dcrutil/v2 v2.0.1
+	github.com/decred/dcrd/gcs v1.1.0
+	github.com/decred/dcrd/txscript/v2 v2.1.0
+	github.com/decred/dcrd/wire v1.3.0
+	github.com/decred/dcrwallet/errors/v2 v2.0.0
+	github.com/decred/dcrwallet/p2p/v2 v2.0.0
+	github.com/decred/dcrwallet/validate v1.1.1
+	github.com/decred/dcrwallet/wallet/v3 v3.1.1-0.20191230143837-6a86dc4676f0
+	github.com/decred/slog v1.0.0
+	github.com/gdamore/tcell v1.3.0
+	github.com/jessevdk/go-flags v1.4.0
+	github.com/jrick/logrotate v1.0.0
+	github.com/rivo/tcell v1.0.0
+	github.com/rivo/tview v0.0.0-20191129065140-82b05c9fb329
+)

client/cmd/dexc/main.go

@@ -0,0 +1,90 @@
+// This code is available on the terms of the project LICENSE.md file,
+// also available online at https://blueoakcouncil.org/license/1.0.0.
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"sync"
+
+	"decred.org/dcrdex/client/cmd/dexc/ui"
+	"decred.org/dcrdex/client/core"
+	"decred.org/dcrdex/client/rpcserver"
+	"decred.org/dcrdex/client/webserver"
+	"decred.org/dcrdex/dex"
+)
+
+var log dex.Logger
+
+func main() {
+	appCtx, cancel := context.WithCancel(context.Background())
+	// Catch ctrl+c. This will need to be smarter eventually, probably displaying
+	// a modal dialog to confirm closing, especially if servers are running or if
+	// swaps are in negotiation.
+	killChan := make(chan os.Signal, 1)
+	signal.Notify(killChan, os.Interrupt)
+	go func() {
+		<-killChan
+		cancel()
+	}()
+
+	// Parse configuration and set up initial logging.
+	//
+	// DRAFT NOTE: It's a little odd that the Configure function is from the ui
+	// package. The ui.Config struct is used both here and in ui. Could create  a
+	// types package used by both, but doing it this way works for now.
+	cfg, err := ui.Configure()
+	if err != nil {
+		fmt.Fprint(os.Stderr, "configration error: ", err)
+		return
+	}
+
+	// If --notui is specified, don't create the tview application. Initialize
+	// logging with the standard stdout logger.
+	if cfg.NoTUI {
+		logStdout := func(msg []byte) {
+			os.Stdout.Write(msg)
+		}
+		clientCore := core.New(&core.Config{
+			DBPath: cfg.DBPath, // global set in config.go
+			Logger: ui.NewLogger("CORE", nil),
+			Certs:  cfg.Certs,
+		})
+		go clientCore.Run(appCtx)
+
+		ui.InitLogging(logStdout)
+		// At least one of --rpc or --web must be specified.
+		if !cfg.RPCOn && !cfg.WebOn {
+			fmt.Fprintf(os.Stderr, "Cannot run without TUI unless --rpc and/or --web is specified")
+			return
+		}
+		var wg sync.WaitGroup
+		if cfg.RPCOn {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				rpcserver.Run(appCtx, clientCore, cfg.RPCAddr, ui.NewLogger("RPC", logStdout))
+			}()
+		}
+		if cfg.WebOn {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				webSrv, err := webserver.New(clientCore, cfg.WebAddr, ui.NewLogger("WEB", logStdout), cfg.ReloadHTML)
+				if err != nil {
+					log.Errorf("Error starting web server: %v", err)
+					return
+				}
+				webSrv.Run(appCtx)
+			}()
+		}
+		wg.Wait()
+		ui.Close()
+		return
+	}
+	// Run in TUI mode.
+	ui.Run(appCtx)
+}

client/cmd/dexc/ui/accountsview.go

@@ -0,0 +1,135 @@
+// This code is available on the terms of the project LICENSE.md file,
+// also available online at https://blueoakcouncil.org/license/1.0.0.
+
+package ui
+
+import (
+	"github.com/rivo/tview"
+)
+
+var dummyFormBox = tview.NewBox()
+
+// accountsViewer is a view for manipulating DEX account and wallet settings.
+type accountsViewer struct {
+	*tview.Flex
+	chain *focusChain
+	form  *tview.Grid
+}
+
+// newAccountsView is the constructor for an accountsViewer.
+func newAccountsView() *accountsViewer {
+	// A journal for logging account-related messages.
+	acctsJournal := newJournal("Accounts Journal", nil)
+	// acctsLog is global.
+	acctsLog = NewLogger("ACCTS", acctsJournal.Write)
+	formBox := tview.NewGrid()
+	formBox.SetBackgroundColor(colorBlack)
+	var acctForm *tview.Form
+
+	// The list of available DEX accounts, and a button to display a form to add
+	// a new DEX account.
+	acctsList := newChooser("Accounts", nil)
+	newAcctBttn := newSimpleButton("Add New DEX Account", func() {
+		formBox.Clear()
+		formBox.AddItem(acctForm, 0, 0, 1, 1, 0, 0, false)
+		acctForm.SetBorderColor(focusColor)
+		app.SetFocus(acctForm)
+	})
+	acctsColumn := tview.NewFlex().
+		SetDirection(tview.FlexRow).
+		AddItem(acctsList, 0, 1, false).
+		AddItem(newAcctBttn, 3, 0, false)
+
+	// The list of exchange wallets registered, and a button to dipslay a form
+	// to add a new wallet.
+	walletsList := newChooser("Wallets", nil)
+	newWalletBttn := newSimpleButton("Add Wallet", func() {
+		acctsLog.Errorf("cannot add a wallet without an account")
+	})
+	walletsColumn := tview.NewFlex().
+		SetDirection(tview.FlexRow).
+		AddItem(walletsList, 0, 1, false).
+		AddItem(newWalletBttn, 3, 0, false)
+
+	// The third column is the main content area (formBox), and a log display at
+	// the bottom
+	thirdColumn := tview.NewFlex().
+		SetDirection(tview.FlexRow).
+		AddItem(fullyCentered(formBox, 60, 17), 0, 3, false).
+		AddItem(acctsJournal, 0, 1, false)
+
+	// The main view.
+	wgt := tview.NewFlex().
+		AddItem(acctsColumn, 30, 0, false).
+		AddItem(walletsColumn, 30, 0, false).
+		AddItem(thirdColumn, 0, 1, false)
+
+	// A form to add a DEX account.
+	//
+	// DRAFT NOTE: I think we need more control over forms and should implement
+	// them using tview.Grid, but this is a start. A major downside is that
+	// tview.Form hijacks tab and arrow keys, making for some unintuitive
+	// navigation behavior.
+	var acctURL, dcrAcctName, dcrwAddr, dcrwPW, dcrwRPCUser, dcrwRPCPass string
+	acctForm = tview.NewForm().
+		AddInputField("DEX URL", "", 0, nil, func(url string) {
+			acctURL = url
+		}).
+		AddInputField("Account Name", "", 0, nil, func(name string) {
+			dcrAcctName = name
+		}).
+		AddInputField("dcrwallet RPC Address", "", 0, nil, func(name string) {
+			dcrwAddr = name
+		}).
+		AddInputField("RPC Username", "", 0, nil, func(name string) {
+			dcrwRPCUser = name
+		}).
+		AddPasswordField("RPC Password", "", 0, 0, func(name string) {
+			dcrwRPCPass = name
+		}).
+		AddPasswordField("Wallet Password", "", 0, 0, func(pw string) {
+			dcrwPW = pw
+		}).
+		AddButton("register", func() {
+			// Obviously the password won't be echoed. Just this way for
+			// demonstration.
+			acctsLog.Infof("registering acct %s with password %s and wallet node %s for DEX %s, using RPC username %s and RPC password %s",
+				dcrAcctName, dcrwPW, dcrwAddr, acctURL, dcrwRPCUser, dcrwRPCPass)
+		}).
+		SetButtonsAlign(tview.AlignRight).
+		SetFieldBackgroundColor(metalBlue).
+		SetButtonBackgroundColor(metalBlue)
+	acctForm.SetCancelFunc(func() {
+		acctForm.SetBorderColor(blurColor)
+		acctsView.setForm(dummyFormBox)
+		setFocus(newAcctBttn)
+	}).SetBorder(true).SetBorderColor(blurColor)
+	acctForm.SetTitle("DEX Registration")
+
+	av := &accountsViewer{
+		Flex: wgt,
+		form: formBox,
+	}
+	av.chain = newFocusChain(av, acctsList, newAcctBttn, walletsList, newWalletBttn, acctsJournal)
+	return av
+}
+
+// AddFocus is part of the focuser interface. Since the accountsViewer supports
+// sub-focus, this method simply passes focus to the focus chain and sets the
+// view's border color.
+func (v *accountsViewer) AddFocus() {
+	// Pass control to the focusChain, but keep the border color on the view.
+	v.chain.focus()
+	v.SetBorderColor(focusColor)
+}
+
+// RemoveFocus is part of the focuser interface.
+func (v *accountsViewer) RemoveFocus() {
+	v.SetBorderColor(blurColor)
+}
+
+// Set the currently displayed form.
+func (v *accountsViewer) setForm(form tview.Primitive) {
+	v.form.Clear()
+	v.form.AddItem(form, 0, 0, 1, 1, 0, 0, false)
+}