Remove unnecessary log.Fatals and suboptimal os.Exits (#343)

Engine fixes up the rest for exchange setup loading

communications/telegram/telegram.go

@@ -8,6 +8,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"time"
 
 	"github.com/thrasher-corp/gocryptotrader/common"
 	"github.com/thrasher-corp/gocryptotrader/communications/base"
@@ -43,9 +44,16 @@ const (
 	talkRoot = "GoCryptoTrader bot"
 )
 
+var (
+	// ErrWaiter is the default timer to wait if an err occurs
+	// before retrying after successfully connecting
+	ErrWaiter = time.Second * 30
+)
+
 // Telegram is the overarching type across this package
 type Telegram struct {
 	base.Base
+	initConnected     bool
 	Token             string
 	Offset            int64
 	AuthorisedClients []int64
@@ -64,6 +72,8 @@ func (t *Telegram) Connect() error {
 	if err := t.TestConnection(); err != nil {
 		return err
 	}
+
+	log.Debugln("Telegram: Connected successfully!")
 	t.Connected = true
 	go t.PollerStart()
 	return nil
@@ -71,9 +81,10 @@ func (t *Telegram) Connect() error {
 
 // PushEvent sends an event to a supplied recipient list via telegram
 func (t *Telegram) PushEvent(event base.Event) error {
+	msg := fmt.Sprintf("Type: %s Details: %s GainOrLoss: %s",
+		event.Type, event.TradeDetails, event.GainLoss)
 	for i := range t.AuthorisedClients {
-		err := t.SendMessage(fmt.Sprintf("Type: %s Details: %s GainOrLoss: %s",
-			event.Type, event.TradeDetails, event.GainLoss), t.AuthorisedClients[i])
+		err := t.SendMessage(msg, t.AuthorisedClients[i])
 		if err != nil {
 			return err
 		}
@@ -83,12 +94,25 @@ func (t *Telegram) PushEvent(event base.Event) error {
 
 // PollerStart starts the long polling sequence
 func (t *Telegram) PollerStart() {
-	t.InitialConnect()
+	errWait := func(err error) {
+		log.Error(err)
+		time.Sleep(ErrWaiter)
+	}
 
 	for {
+		if !t.initConnected {
+			err := t.InitialConnect()
+			if err != nil {
+				errWait(err)
+				continue
+			}
+			t.initConnected = true
+		}
+
 		resp, err := t.GetUpdates()
 		if err != nil {
-			log.Error(err)
+			errWait(err)
+			continue
 		}
 
 		for i := range resp.Result {
@@ -96,7 +120,8 @@ func (t *Telegram) PollerStart() {
 				if string(resp.Result[i].Message.Text[0]) == "/" {
 					err = t.HandleMessages(resp.Result[i].Message.Text, resp.Result[i].Message.From.ID)
 					if err != nil {
-						log.Error(err)
+						log.Errorf("Telegram: Unable to HandleMessages. Error: %s\n", err)
+						continue
 					}
 				}
 				t.Offset = resp.Result[i].UpdateID
@@ -107,14 +132,14 @@ func (t *Telegram) PollerStart() {
 
 // InitialConnect sets offset, and sends a welcome greeting to any associated
 // IDs
-func (t *Telegram) InitialConnect() {
+func (t *Telegram) InitialConnect() error {
 	resp, err := t.GetUpdates()
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
 
 	if !resp.Ok {
-		log.Fatal(resp.Description)
+		return errors.New(resp.Description)
 	}
 
 	warmWelcomeList := make(map[string]int64)
@@ -127,17 +152,25 @@ func (t *Telegram) InitialConnect() {
 	for userName, ID := range warmWelcomeList {
 		err = t.SendMessage(fmt.Sprintf("GoCryptoTrader bot has connected: Hello, %s!", userName), ID)
 		if err != nil {
-			log.Fatal(err)
+			log.Errorf("Telegram: Unable to send welcome message. Error: %s\n", err)
+			continue
 		}
 	}
+
 	if len(resp.Result) == 0 {
-		return
+		return nil
 	}
+
 	t.Offset = resp.Result[len(resp.Result)-1].UpdateID
+	return nil
 }
 
 // HandleMessages handles incoming message from the long polling routine
 func (t *Telegram) HandleMessages(text string, chatID int64) error {
+	if t.Verbose {
+		log.Debugf("Telegram: Received message: %s\n", text)
+	}
+
 	switch {
 	case common.StringContains(text, cmdHelp):
 		return t.SendMessage(fmt.Sprintf("%s: %s", talkRoot, cmdHelpReply), chatID)
@@ -161,7 +194,7 @@ func (t *Telegram) HandleMessages(text string, chatID int64) error {
 		return t.SendMessage(fmt.Sprintf("%s: %s", talkRoot, t.GetPortfolio()), chatID)
 
 	default:
-		return t.SendMessage(fmt.Sprintf("command %s not recognized", text), chatID)
+		return t.SendMessage(fmt.Sprintf("Command %s not recognized", text), chatID)
 	}
 }
 
@@ -214,6 +247,10 @@ func (t *Telegram) SendMessage(text string, chatID int64) error {
 	if !resp.Ok {
 		return errors.New(resp.Description)
 	}
+
+	if t.Verbose {
+		log.Debugf("Telegram: Sent '%s'\n", text)
+	}
 	return nil
 }
 

currency/coinmarketcap/coinmarketcap.go

@@ -8,7 +8,6 @@ package coinmarketcap
 import (
 	"errors"
 	"fmt"
-	"log"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -80,18 +79,15 @@ func (c *Coinmarketcap) SetDefaults() {
 }
 
 // Setup sets user configuration
-func (c *Coinmarketcap) Setup(conf Settings) {
+func (c *Coinmarketcap) Setup(conf Settings) error {
 	if !conf.Enabled {
 		c.Enabled = false
-	} else {
-		c.Enabled = true
-		c.Verbose = conf.Verbose
-		c.APIkey = conf.APIkey
-		err := c.SetAccountPlan(conf.AccountPlan)
-		if err != nil {
-			log.Fatal(err)
-		}
 	}
+
+	c.Enabled = true
+	c.Verbose = conf.Verbose
+	c.APIkey = conf.APIkey
+	return c.SetAccountPlan(conf.AccountPlan)
 }
 
 // GetCryptocurrencyInfo returns all static metadata for one or more

currency/coinmarketcap/coinmarketcap_test.go

@@ -41,7 +41,14 @@ func TestSetup(t *testing.T) {
 	cfg.Enabled = true
 	cfg.AccountPlan = "basic"
 
-	c.Setup(cfg)
+	if err := c.Setup(cfg); err != nil {
+		t.Error(err)
+	}
+
+	cfg.AccountPlan = "meow"
+	if err := c.Setup(cfg); err == nil {
+		t.Error("expected err when invalid account plan is specified")
+	}
 }
 
 func TestCheckAccountPlan(t *testing.T) {

currency/storage.go

@@ -116,15 +116,20 @@ func (s *Storage) RunUpdater(overrides BotOverrides, settings *MainConfiguration
 		log.Debugf("Setting up currency analysis system with Coinmarketcap...")
 		c := &coinmarketcap.Coinmarketcap{}
 		c.SetDefaults()
-		c.Setup(coinmarketcap.Settings{
+		err := c.Setup(coinmarketcap.Settings{
 			Name:        settings.CryptocurrencyProvider.Name,
 			Enabled:     true,
 			AccountPlan: settings.CryptocurrencyProvider.AccountPlan,
 			APIkey:      settings.CryptocurrencyProvider.APIkey,
 			Verbose:     settings.CryptocurrencyProvider.Verbose,
 		})
-
-		s.currencyAnalysis = c
+		if err != nil {
+			log.Errorf("Unable to setup CoinMarketCap analysis. Error: %s", err)
+			c = nil
+			settings.CryptocurrencyProvider.Enabled = false
+		} else {
+			s.currencyAnalysis = c
+		}
 	}
 
 	if filePath == "" {

exchange.go

@@ -258,7 +258,4 @@ func SetupExchanges() {
 		)
 	}
 	wg.Wait()
-	if len(bot.exchanges) == 0 {
-		log.Fatalf("No exchanges were able to be loaded. Exiting")
-	}
 }

exchanges/mock/recording.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
-	"log"
 	"net/http"
 	"net/url"
 	"os"
@@ -163,7 +162,7 @@ func HTTPRecord(res *http.Response, service string, respContents []byte) error {
 
 						mockRespVals, urlErr := url.ParseQuery(mockResponses[i].BodyParams)
 						if urlErr != nil {
-							log.Fatal(urlErr)
+							return urlErr
 						}
 
 						if MatchURLVals(respQueryVals, mockRespVals) {

main.go

@@ -124,6 +124,9 @@ func main() {
 	log.Debugf("Global HTTP request timeout: %v.\n", common.HTTPClient.Timeout)
 
 	SetupExchanges()
+	if len(bot.exchanges) == 0 {
+		log.Fatal("No exchanges were able to be loaded. Exiting")
+	}
 
 	log.Debugf("Starting communication mediums..")
 	cfg := bot.config.GetCommunicationsConfig()