Merge pull request mouredev#7182 from hozlucas28/Solution-45-Go

mouredev#45 - Go

Author: kontroldev

Roadmap/45 - GITHUB OCTOVERSE/go/hozlucas28.go

@@ -0,0 +1,264 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"os/exec"
+)
+
+/* -------------------------------------------------------------------------- */
+/*                                   STRUCTS                                  */
+/* -------------------------------------------------------------------------- */
+
+/* -------------------------------- Adapters -------------------------------- */
+
+type Adapter struct{}
+
+func (_ *Adapter) UserData(userData *User) *UserData {
+	var forks uint = 0
+	for _, publicRepo := range userData.PublicRepositoriesData {
+		if publicRepo.Fork {
+			forks++
+		}
+	}
+
+	return &UserData{
+		Followers:          userData.Followers,
+		Following:          userData.Following,
+		Forks:              forks,
+		Name:               userData.Name,
+		PublicRepositories: userData.PublicRepositories,
+		Stars:              uint(len(userData.Stars)),
+		UserName:           userData.Login,
+	}
+
+}
+
+/* ------------------------------- GitHub API ------------------------------- */
+
+type PublicRepositories struct {
+	Fork bool `json:"fork"`
+}
+
+type Stars struct {
+	Url string `json:"url"`
+}
+
+type User struct {
+	Followers              uint                 `json:"followers"`
+	Following              uint                 `json:"following"`
+	Login                  string               `json:"login"`
+	Name                   string               `json:"name"`
+	PublicRepositories     uint                 `json:"public_repos"`
+	ReposUrl               string               `json:"repos_url"`
+	PublicRepositoriesData []PublicRepositories `json:"public_repos_data"`
+	Stars                  []Stars              `json:"stars"`
+}
+
+type GitHubAPI struct {
+	User User
+}
+
+/* ------------------------------ GitHubService ----------------------------- */
+
+type UserData struct {
+	Followers          uint   `json:"followers"`
+	Following          uint   `json:"following"`
+	Forks              uint   `json:"forks"`
+	Name               string `json:"name"`
+	PublicRepositories uint   `json:"public_repositories"`
+	Stars              uint   `json:"stars"`
+	UserName           string `json:"userName"`
+}
+
+type GitHubService interface {
+	GetUserData(userName string) (*UserData, error)
+}
+
+type githubService struct {
+	accessToken string
+	_           struct{}
+}
+
+func NewGitHubService(accessToken string) GitHubService {
+	var githubService githubService = githubService{accessToken: accessToken}
+	return &githubService
+}
+
+func (githubService *githubService) GetUserData(userName string) (*UserData, error) {
+	var userData User
+	var adapter Adapter
+
+	var err error
+	var errMsg string
+
+	var client *http.Client = &http.Client{}
+	var request *http.Request
+
+	var headers map[string][]string = map[string][]string{
+		"Authorization":        {fmt.Sprintf("Bearer %s", githubService.accessToken)},
+		"Accept":               {"application/vnd.github+json"},
+		"X-GitHub-Api-Version": {"2022-11-28"},
+	}
+
+	var response *http.Response
+	var starsData []Stars
+	var publicReposData []PublicRepositories
+
+	request, err = http.NewRequest("GET", fmt.Sprintf("https://api.github.com/users/%s", userName), nil)
+	if err != nil {
+		return &UserData{}, err
+	}
+
+	request.Header = headers
+
+	response, err = client.Do(request)
+	if err != nil {
+		return &UserData{}, err
+	}
+
+	if response.StatusCode == http.StatusOK {
+		body, err := io.ReadAll(response.Body)
+		if err != nil {
+			return &UserData{}, err
+		}
+
+		err = json.Unmarshal(body, &userData)
+		if err != nil {
+			return &UserData{}, err
+		}
+
+	} else {
+		errMsg = fmt.Sprintf("%s: %v", request.Response.Status, request.Response.Body)
+		return &UserData{}, errors.New(errMsg)
+	}
+
+	request, err = http.NewRequest("GET", fmt.Sprintf("https://api.github.com/users/%s/starred", userName), nil)
+	if err != nil {
+		return &UserData{}, err
+	}
+
+	request.Header = headers
+
+	response, err = client.Do(request)
+	if err != nil {
+		return &UserData{}, err
+	}
+
+	if response.StatusCode == http.StatusOK {
+		body, err := io.ReadAll(response.Body)
+		if err != nil {
+			return &UserData{}, err
+		}
+
+		err = json.Unmarshal(body, &starsData)
+		if err != nil {
+			return &UserData{}, err
+		}
+
+		userData.Stars = starsData
+	} else {
+		errMsg = fmt.Sprintf("%s: %v", request.Response.Status, request.Response.Body)
+		return &UserData{}, errors.New(errMsg)
+	}
+
+	request, err = http.NewRequest("GET", userData.ReposUrl, nil)
+	if err != nil {
+		return &UserData{}, err
+	}
+
+	request.Header = headers
+
+	response, err = client.Do(request)
+	if err != nil {
+		return &UserData{}, err
+	}
+
+	if response.StatusCode == http.StatusOK {
+		body, err := io.ReadAll(response.Body)
+		if err != nil {
+			return &UserData{}, err
+		}
+
+		err = json.Unmarshal(body, &publicReposData)
+		if err != nil {
+			return &UserData{}, err
+		}
+
+		userData.PublicRepositoriesData = publicReposData
+	} else {
+		errMsg = fmt.Sprintf("%s: %v", request.Response.Status, request.Response.Body)
+		return &UserData{}, errors.New(errMsg)
+	}
+
+	return adapter.UserData(&userData), err
+}
+
+/* -------------------------------------------------------------------------- */
+/*                                    MAIN                                    */
+/* -------------------------------------------------------------------------- */
+
+func main() {
+	const accessToken string = "XXX" // Complete with your personal GitHub Access Token.
+	var githubService GitHubService = NewGitHubService(accessToken)
+
+	var userInput string
+
+	var userData *UserData
+	var err error
+
+	var cmd *exec.Cmd
+
+	var i int
+	var padding int
+
+	fmt.Print("> Enter a GitHub username (-1 to exit): ")
+	fmt.Scanf("%s\n", &userInput)
+
+	for userInput != "-1" {
+		userData, err = githubService.GetUserData(userInput)
+
+		if err == nil {
+			cmd = exec.Command("clear")
+			cmd.Stdout = os.Stdout
+			cmd.Run()
+
+			fmt.Print("+ ")
+			for i = 0; i < 52; i++ {
+				fmt.Print("-")
+			}
+			fmt.Print(" +\n")
+
+			padding = len(userData.UserName) - 52
+			fmt.Printf("+ %-*s%s%*s +\n", padding/2, "", userData.UserName, padding/2+padding%2, "")
+
+			fmt.Print("+ ")
+			for i = 0; i < 52; i++ {
+				fmt.Print("-")
+			}
+			fmt.Print(" +\n")
+
+			fmt.Printf("+ %-52s +\n", fmt.Sprintf("%s: %s.", "Name", userData.Name))
+			fmt.Printf("+ %-52s +\n", fmt.Sprintf("%s: %d.", "Public repositories", userData.PublicRepositories))
+			fmt.Printf("+ %-52s +\n", fmt.Sprintf("%s: %d.", "Repositories stared", userData.Stars))
+			fmt.Printf("+ %-52s +\n", fmt.Sprintf("%s: %d.", "Number of repositories forked", userData.Forks))
+			fmt.Printf("+ %-52s +\n", fmt.Sprintf("%s: %d.", "Following", userData.Following))
+			fmt.Printf("+ %-52s +\n", fmt.Sprintf("%s: %d.", "Followers", userData.Followers))
+
+			fmt.Print("+ ")
+			for i = 0; i < 52; i++ {
+				fmt.Print("-")
+			}
+			fmt.Print(" +\n")
+		} else {
+			fmt.Println("\n> An error occurred on fetch '{user_input}' username! Try again...")
+		}
+
+		fmt.Print("\n> Enter a GitHub username (-1 to exit): ")
+		fmt.Scanf("%s\n", &userInput)
+	}
+}