feat: add internal structures

Makefile

@@ -2,7 +2,7 @@ build:
 	go build -o ./bin/app ./cmd/main.go
 
 test:
-	go test ./...
+	go test -v ./...
 
 run:
 	go run ./cmd/main.go

README.md

@@ -1,2 +1,8 @@
 # feature-tag
 How manage feature tags with go?
+
+
+## Use case
+
+- Retorna todas as tags ativas.
+- Verifica se {tag} está ativa?

go.mod

@@ -1,3 +1,11 @@
 module github.com/mist-gopher/feature-tag
 
 go 1.22.0
+
+require github.com/stretchr/testify v1.9.0
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/client/client.go

@@ -0,0 +1,11 @@
+package client
+
+type Client struct {
+	Id   string
+	Keys []ClientKey
+}
+
+type ClientKey struct {
+	Name  string
+	Value string
+}

internal/repository/memory_repo/tag.go

@@ -0,0 +1,31 @@
+package memory_repo
+
+import (
+	"github.com/mist-gopher/feature-tag/internal/tag"
+)
+
+type Tag struct {
+	Data map[string]tag.Tag
+	Err  error
+}
+
+func NewTagRepositoryInMemory() Tag {
+	return Tag{
+		Data: map[string]tag.Tag{},
+		Err:  nil,
+	}
+}
+
+func (repo *Tag) GetByName(name string) (*tag.Tag, error) {
+	if repo.Err != nil {
+		return nil, repo.Err
+	}
+
+	value, exist := repo.Data[name]
+
+	if !exist {
+		return nil, nil
+	}
+
+	return &value, nil
+}

internal/tag/tag.go

@@ -0,0 +1,20 @@
+package tag
+
+type Tag struct {
+	Id    string
+	Name  string
+	Value bool
+}
+
+func New(clientId, name string, value bool) Tag {
+	return Tag{
+		Id: MakeId(name, clientId),
+    Name:  name,
+		Value: value,
+	}
+}
+
+func MakeId(name, clientId string) string {
+  return "tag:" + clientId + ":" + name
+}
+

internal/tag/tag_test.go

@@ -0,0 +1,16 @@
+package tag_test
+
+import (
+	"testing"
+
+	"github.com/mist-gopher/feature-tag/internal/tag"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewTag(t *testing.T){
+  ntag := tag.New("clientid", "tagname", false)
+  assert.Equal(t, "tag:clientid:tagname", ntag.Id)
+  assert.Equal(t, "tagname", ntag.Name)
+  assert.False(t, ntag.Value)
+}
+

internal/usecase/get_tag_status.go

@@ -0,0 +1,34 @@
+package usecase
+
+import (
+	"github.com/mist-gopher/feature-tag/internal/tag"
+)
+
+type GetTagStatusInput struct {
+	AppId   string
+	ApiKey  string
+	TagName string
+}
+
+type GetTagStatusOutput struct {
+	Active bool
+}
+
+type GetTagByNameRepository interface {
+	GetByName(name string) (*tag.Tag, error)
+}
+
+func GetTagStatus(input GetTagStatusInput, repo GetTagByNameRepository) (GetTagStatusOutput, error) {
+	output := GetTagStatusOutput{Active: false}
+	tag, err := repo.GetByName(tag.MakeId(input.TagName, input.AppId))
+
+	if err != nil {
+		return output, err
+	}
+
+	if tag != nil {
+		output.Active = tag.Value
+	}
+
+	return output, nil
+}

internal/usecase/get_tag_status_test.go

@@ -0,0 +1,57 @@
+package usecase_test
+
+import (
+	"testing"
+
+	"github.com/mist-gopher/feature-tag/internal/repository/memory_repo"
+	"github.com/mist-gopher/feature-tag/internal/tag"
+	"github.com/mist-gopher/feature-tag/internal/usecase"
+	"github.com/stretchr/testify/assert"
+)
+
+func MockTagData() map[string]tag.Tag {
+	activeTag := tag.New("valid key", "tagname", true)
+	return map[string]tag.Tag{
+		activeTag.Id: activeTag,
+	}
+}
+
+func TestGetTagStatus(t *testing.T) {
+	type TestCase struct {
+		input       usecase.GetTagStatusInput
+		resultValue bool
+		resultError error
+	}
+
+	cases := map[string]TestCase{
+		"with valid input for active tag": {
+			input: usecase.GetTagStatusInput{
+				AppId:   "valid key",
+				ApiKey:  "valid id",
+				TagName: "tagname",
+			},
+			resultValue: true,
+			resultError: nil,
+		},
+		"unknown tag": {
+			input: usecase.GetTagStatusInput{
+				AppId:   "valid key",
+				ApiKey:  "valid id",
+				TagName: "not a created tag",
+			},
+			resultValue: false,
+			resultError: nil,
+		},
+	}
+
+	repo := memory_repo.NewTagRepositoryInMemory()
+	repo.Data = MockTagData()
+
+	for testName, testCase := range cases {
+		t.Run(testName, func(t *testing.T) {
+			result, err := usecase.GetTagStatus(testCase.input, &repo)
+			assert.Equal(t, nil, err)
+			assert.Equal(t, testCase.resultValue, result.Active)
+		})
+	}
+}