Extracted scenario

cmd/go-mtg-vk/main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"encoding/json"
-	"gitlab.com/flygrounder/go-mtg-vk/internal/cardsinfo"
 	"io/ioutil"
 	"log"
 	"math/rand"
@@ -10,6 +9,9 @@ import (
 	"strconv"
 	"time"
 
+	"gitlab.com/flygrounder/go-mtg-vk/internal/cardsinfo"
+	"gitlab.com/flygrounder/go-mtg-vk/internal/scenario"
+
 	"github.com/gin-gonic/gin"
 	"gitlab.com/flygrounder/go-mtg-vk/internal/caching"
 	"gitlab.com/flygrounder/go-mtg-vk/internal/vk"
@@ -26,17 +28,19 @@ func main() {
 	var dictMap map[string]string
 	_ = json.Unmarshal(dictBytes, &dictMap)
 	handler := vk.Handler{
+	    Scenario: &scenario.Scenario{
 		Sender: &vk.ApiSender{
-			Token: os.Getenv("VK_TOKEN"),
+		    Token: os.Getenv("VK_TOKEN"),
 		},
 		Logger:             log.New(os.Stdout, "", 0),
+		Cache:              caching.NewClient("redis:6379", "", time.Hour*24, 0),
+		InfoFetcher: &cardsinfo.Fetcher{
+		    Dict: dictMap,
+		},
+		},
 		SecretKey:          os.Getenv("VK_SECRET_KEY"),
 		GroupId:            groupId,
 		ConfirmationString: os.Getenv("VK_CONFIRMATION_STRING"),
-		Cache:              caching.NewClient("redis:6379", "", time.Hour*24, 0),
-		InfoFetcher: &cardsinfo.Fetcher{
-			Dict: dictMap,
-		},
 	}
 
 	r.POST("callback/message", handler.HandleMessage)

internal/caching/cache.go

@@ -1,8 +1,9 @@
 package caching
 
 import (
-	"github.com/go-redis/redis"
 	"time"
+
+	"github.com/go-redis/redis"
 )
 
 type CacheClient struct {

internal/scenario/scenario.go

@@ -0,0 +1,89 @@
+package scenario
+
+import (
+	"errors"
+	"log"
+	"strings"
+)
+
+const (
+	incorrectMessage         = "Некорректная команда"
+	cardNotFoundMessage      = "Карта не найдена"
+	pricesUnavailableMessage = "Цены временно недоступны, попробуйте позже"
+)
+
+type Scenario struct {
+    Sender Sender
+    Logger             *log.Logger
+    InfoFetcher        CardInfoFetcher
+    Cache              CardCache
+}
+
+type UserMessage struct {
+	Body   string
+	UserId int64
+}
+
+type CardCache interface {
+	Get(cardName string) (string, error)
+	Set(cardName string, message string)
+}
+
+type CardInfoFetcher interface {
+	GetFormattedCardPrices(name string) (string, error)
+	GetNameByCardId(set string, number string) string
+	GetOriginalName(name string) string
+}
+
+type Sender interface {
+	Send(userId int64, message string)
+}
+
+func (s *Scenario) HandleSearch(msg *UserMessage) {
+	cardName, err := s.getCardNameByCommand(msg.Body)
+	if err != nil {
+		s.Sender.Send(msg.UserId, incorrectMessage)
+		s.Logger.Printf("[info] Not correct command. Message: %s user input: %s", err.Error(), msg.Body)
+	} else if cardName == "" {
+		s.Sender.Send(msg.UserId, cardNotFoundMessage)
+		s.Logger.Printf("[info] Could not find card. User input: %s", msg.Body)
+	} else {
+		message, err := s.getMessage(cardName)
+		if err != nil {
+			s.Sender.Send(msg.UserId, pricesUnavailableMessage)
+			s.Logger.Printf("[error] Could not find SCG prices. Message: %s card name: %s", err.Error(), cardName)
+			return
+		}
+		s.Sender.Send(msg.UserId, message)
+	}
+}
+
+func (s *Scenario) getMessage(cardName string) (string, error) {
+	val, err := s.Cache.Get(cardName)
+	if err != nil {
+		message, err := s.InfoFetcher.GetFormattedCardPrices(cardName)
+		if err != nil {
+			return "", err
+		}
+		s.Cache.Set(cardName, message)
+		return message, nil
+	}
+	return val, nil
+}
+
+func (s *Scenario) getCardNameByCommand(command string) (string, error) {
+	var name string
+	switch {
+	case strings.HasPrefix(command, "!s"):
+		split := strings.Split(command, " ")
+		if len(split) < 3 {
+			return "", errors.New("wrong command")
+		}
+		set := split[1]
+		number := split[2]
+		name = s.InfoFetcher.GetNameByCardId(set, number)
+	default:
+		name = s.InfoFetcher.GetOriginalName(command)
+	}
+	return name, nil
+}

internal/scenario/scenario_test.go

@@ -0,0 +1,82 @@
+package scenario
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestScenario_HandleSearch_BadCommand(t *testing.T) {
+	testCtx := GetTestScenarioCtx()
+	testCtx.Scenario.HandleSearch(&UserMessage{
+	    Body:   "!s",
+	    UserId: 1,
+	})
+	assert.Equal(t, []testMessage{
+		{
+			userId:  1,
+			message: incorrectMessage,
+		},
+	}, testCtx.Sender.sent)
+	assert.True(t, strings.Contains(testCtx.LogBuf.String(), "[info]"))
+}
+
+func TestScenario_HandleSearch_GoodCommand(t *testing.T) {
+	testCtx := GetTestScenarioCtx()
+	testCtx.Scenario.HandleSearch(&UserMessage{
+	    Body:   "!s grn 228",
+	    UserId: 1,
+	})
+	assert.Equal(t, []testMessage{
+		{
+			userId:  1,
+			message: "good",
+		},
+	}, testCtx.Sender.sent)
+}
+
+func TestScenario_HandleSearch_NotFoundCard(t *testing.T) {
+	testCtx := GetTestScenarioCtx()
+	testCtx.Scenario.HandleSearch(&UserMessage{
+	    Body:   "absolutely_random_card",
+	    UserId: 1,
+	})
+	assert.Equal(t, []testMessage{
+		{
+			userId:  1,
+			message: cardNotFoundMessage,
+		},
+	}, testCtx.Sender.sent)
+	assert.True(t, strings.Contains(testCtx.LogBuf.String(), "[info]"))
+}
+
+func TestScenario_HandleSearch_BadCard(t *testing.T) {
+	testCtx := GetTestScenarioCtx()
+	testCtx.Scenario.HandleSearch(&UserMessage{
+	    Body:   "bad",
+	    UserId: 1,
+	})
+	assert.Equal(t, []testMessage{
+		{
+			userId:  1,
+			message: pricesUnavailableMessage,
+		},
+	}, testCtx.Sender.sent)
+	assert.True(t, strings.Contains(testCtx.LogBuf.String(), "[error]"))
+}
+func TestScenario_HandleSearch_Uncached(t *testing.T) {
+	testCtx := GetTestScenarioCtx()
+	testCtx.Scenario.HandleSearch(&UserMessage{
+	    Body:   "uncached",
+	    UserId: 1,
+	})
+	assert.Equal(t, []testMessage{
+		{
+			userId:  1,
+			message: "uncached",
+		},
+	}, testCtx.Sender.sent)
+	msg, _ := testCtx.Scenario.Cache.Get("uncached")
+	assert.Equal(t, "uncached", msg)
+}

internal/scenario/test_cache.go

@@ -1,4 +1,4 @@
-package vk
+package scenario
 
 import "errors"
 

internal/scenario/test_ctx.go

@@ -0,0 +1,31 @@
+package scenario
+
+import (
+	"bytes"
+	"log"
+)
+
+type TestScenarioCtx struct {
+	Scenario *Scenario
+	Sender   *testSender
+	LogBuf   *bytes.Buffer
+}
+
+func GetTestScenarioCtx() TestScenarioCtx {
+	sender := &testSender{}
+	buf := &bytes.Buffer{}
+	return TestScenarioCtx{
+		LogBuf: buf,
+		Scenario: &Scenario{
+			Sender:      sender,
+			Logger:      log.New(buf, "", 0),
+			InfoFetcher: &testInfoFetcher{},
+			Cache: &testCache{
+				table: map[string]string{
+					"good": "good",
+				},
+			},
+		},
+		Sender: sender,
+	}
+}

internal/scenario/test_info_fetcher.go

@@ -1,4 +1,4 @@
-package vk
+package scenario
 
 import (
 	"errors"

internal/scenario/test_sender.go

@@ -1,4 +1,4 @@
-package vk
+package scenario
 
 type testSender struct {
 	sent []testMessage
@@ -9,7 +9,7 @@ type testMessage struct {
 	message string
 }
 
-func (s *testSender) send(userId int64, message string) {
+func (s *testSender) Send(userId int64, message string) {
 	s.sent = append(s.sent, testMessage{
 		userId:  userId,
 		message: message,

internal/vk/handler.go

@@ -1,23 +1,18 @@
 package vk
 
 import (
-	"errors"
-	"log"
 	"net/http"
-	"strings"
 
 	"github.com/gin-gonic/gin"
+	"gitlab.com/flygrounder/go-mtg-vk/internal/scenario"
 )
 
 type Handler struct {
-	Sender             sender
-	Logger             *log.Logger
+	Scenario *scenario.Scenario
 	SecretKey          string
 	GroupId            int64
 	ConfirmationString string
 	DictPath           string
-	Cache              cardCache
-	InfoFetcher        cardInfoFetcher
 }
 
 type cardInfoFetcher interface {
@@ -59,62 +54,16 @@ func (h *Handler) HandleMessage(c *gin.Context) {
 	case "confirmation":
 		h.handleConfirmation(c, &req)
 	case "message_new":
-		go h.handleSearch(&req)
+		go h.Scenario.HandleSearch(&scenario.UserMessage{
+			Body:   req.Object.Body,
+			UserId: req.Object.UserId,
+		})
 		c.String(http.StatusOK, "ok")
 	}
 }
 
-func (h *Handler) handleSearch(req *messageRequest) {
-	cardName, err := h.getCardNameByCommand(req.Object.Body)
-	if err != nil {
-		h.Sender.send(req.Object.UserId, incorrectMessage)
-		h.Logger.Printf("[info] Not correct command. Message: %s user input: %s", err.Error(), req.Object.Body)
-	} else if cardName == "" {
-		h.Sender.send(req.Object.UserId, cardNotFoundMessage)
-		h.Logger.Printf("[info] Could not find card. User input: %s", req.Object.Body)
-	} else {
-		message, err := h.getMessage(cardName)
-		if err != nil {
-			h.Sender.send(req.Object.UserId, pricesUnavailableMessage)
-			h.Logger.Printf("[error] Could not find SCG prices. Message: %s card name: %s", err.Error(), cardName)
-			return
-		}
-		h.Sender.send(req.Object.UserId, message)
-	}
-}
-
 func (h *Handler) handleConfirmation(c *gin.Context, req *messageRequest) {
 	if (req.Type == "confirmation") && (req.GroupId == h.GroupId) {
 		c.String(http.StatusOK, h.ConfirmationString)
 	}
 }
-
-func (h *Handler) getMessage(cardName string) (string, error) {
-	val, err := h.Cache.Get(cardName)
-	if err != nil {
-		message, err := h.InfoFetcher.GetFormattedCardPrices(cardName)
-		if err != nil {
-			return "", err
-		}
-		h.Cache.Set(cardName, message)
-		return message, nil
-	}
-	return val, nil
-}
-
-func (h *Handler) getCardNameByCommand(command string) (string, error) {
-	var name string
-	switch {
-	case strings.HasPrefix(command, "!s"):
-		split := strings.Split(command, " ")
-		if len(split) < 3 {
-			return "", errors.New("wrong command")
-		}
-		set := split[1]
-		number := split[2]
-		name = h.InfoFetcher.GetNameByCardId(set, number)
-	default:
-		name = h.InfoFetcher.GetOriginalName(command)
-	}
-	return name, nil
-}

internal/vk/handler_test.go

@@ -1,9 +1,9 @@
 package vk
 
 import (
-	"github.com/stretchr/testify/assert"
-	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestHandler_HandleMessage_Confirm(t *testing.T) {
@@ -36,86 +36,3 @@ func TestHandler_HandleMessage_NoSecretKey(t *testing.T) {
 	assert.Equal(t, "", testCtx.recorder.Body.String())
 }
 
-func TestHandler_handleSearch_BadCommand(t *testing.T) {
-	testCtx := getTestHandlerCtx()
-	testCtx.handler.handleSearch(&messageRequest{
-		Object: userMessage{
-			Body:   "!s",
-			UserId: 1,
-		},
-	})
-	assert.Equal(t, []testMessage{
-		{
-			userId:  1,
-			message: incorrectMessage,
-		},
-	}, testCtx.sender.sent)
-	assert.True(t, strings.Contains(testCtx.logBuf.String(), "[info]"))
-}
-
-func TestHandler_handleSearch_GoodCommand(t *testing.T) {
-	testCtx := getTestHandlerCtx()
-	testCtx.handler.handleSearch(&messageRequest{
-		Object: userMessage{
-			Body:   "!s grn 228",
-			UserId: 1,
-		},
-	})
-	assert.Equal(t, []testMessage{
-		{
-			userId:  1,
-			message: "good",
-		},
-	}, testCtx.sender.sent)
-}
-
-func TestHandler_handleSearch_NotFoundCard(t *testing.T) {
-	testCtx := getTestHandlerCtx()
-	testCtx.handler.handleSearch(&messageRequest{
-		Object: userMessage{
-			Body:   "absolutely_random_card",
-			UserId: 1,
-		},
-	})
-	assert.Equal(t, []testMessage{
-		{
-			userId:  1,
-			message: cardNotFoundMessage,
-		},
-	}, testCtx.sender.sent)
-	assert.True(t, strings.Contains(testCtx.logBuf.String(), "[info]"))
-}
-
-func TestHandler_handleSearch_BadCard(t *testing.T) {
-	testCtx := getTestHandlerCtx()
-	testCtx.handler.handleSearch(&messageRequest{
-		Object: userMessage{
-			Body:   "bad",
-			UserId: 1,
-		},
-	})
-	assert.Equal(t, []testMessage{
-		{
-			userId:  1,
-			message: pricesUnavailableMessage,
-		},
-	}, testCtx.sender.sent)
-	assert.True(t, strings.Contains(testCtx.logBuf.String(), "[error]"))
-}
-func TestHandler_handleSearch_Uncached(t *testing.T) {
-	testCtx := getTestHandlerCtx()
-	testCtx.handler.handleSearch(&messageRequest{
-		Object: userMessage{
-			Body:   "uncached",
-			UserId: 1,
-		},
-	})
-	assert.Equal(t, []testMessage{
-		{
-			userId:  1,
-			message: "uncached",
-		},
-	}, testCtx.sender.sent)
-	msg, _ := testCtx.handler.Cache.Get("uncached")
-	assert.Equal(t, "uncached", msg)
-}

internal/vk/sender.go

@@ -31,7 +31,7 @@ type errorResponse struct {
 	ErrorMsg  string `json:"error_msg"`
 }
 
-func (s *ApiSender) send(userId int64, message string) {
+func (s *ApiSender) Send(userId int64, message string) {
 	randomId := rand.Int63()
 	params := []string{
 		"access_token=" + s.Token,

internal/vk/sender_test.go

@@ -25,7 +25,7 @@ func TestApiSender_Send_OK(t *testing.T) {
 	).ParamPresent("random_id").Reply(http.StatusOK)
 
 	sender := ApiSender{Token: "token"}
-	sender.send(1, "msg")
+	sender.Send(1, "msg")
 	assert.False(t, gock.HasUnmatchedRequest())
 }
 
@@ -39,7 +39,7 @@ func TestApiSender_Send_NotOK(t *testing.T) {
 		Token:  "token",
 		Logger: log.New(b, "", 0),
 	}
-	sender.send(1, "msg")
+	sender.Send(1, "msg")
 	assert.True(t, strings.Contains(b.String(), "[error]"))
 }
 
@@ -60,6 +60,6 @@ func TestApiSender_Send_ErrorCode(t *testing.T) {
 		Token:  "token",
 		Logger: log.New(b, "", 0),
 	}
-	sender.send(1, "msg")
+	sender.Send(1, "msg")
 	assert.True(t, strings.Contains(b.String(), "[error]"))
 }

internal/vk/test_ctx.go

@@ -3,37 +3,26 @@ package vk
 import (
 	"bytes"
 	"encoding/json"
-	"github.com/gin-gonic/gin"
-	"log"
 	"net/http/httptest"
+
+	"github.com/gin-gonic/gin"
+	"gitlab.com/flygrounder/go-mtg-vk/internal/scenario"
 )
 
 type testCtx struct {
 	handler  *Handler
 	recorder *httptest.ResponseRecorder
-	sender   *testSender
-	logBuf   *bytes.Buffer
 }
 
 func getTestHandlerCtx() testCtx {
-	sender := &testSender{}
-	buf := &bytes.Buffer{}
+    s := scenario.GetTestScenarioCtx()
 	return testCtx{
-		logBuf: buf,
 		handler: &Handler{
 			SecretKey:          "sec",
 			GroupId:            10,
 			ConfirmationString: "con",
-			Sender:             sender,
-			Logger:             log.New(buf, "", 0),
-			InfoFetcher:        &testInfoFetcher{},
-			Cache: &testCache{
-				table: map[string]string{
-					"good": "good",
-				},
-			},
+			Scenario: s.Scenario,
 		},
-		sender:   sender,
 		recorder: httptest.NewRecorder(),
 	}
 }