Add 'info' command

Author: juho05

README.md

@@ -16,6 +16,11 @@ Create a new project:
 codegame new
 ```
 
+Get information about a game server:
+```sh
+codegame info <url>
+```
+
 Help:
 ```sh
 codegame --help
@@ -24,13 +29,15 @@ codegame --help
 ## Features
 
 - View the CodeGame documentation
-- Automatic version detection and management
-- Create a new client
-  - Go
-- Create a new game server
-  - Go
-- Initialize Git
-- Create README and LICENSE files
+- View information about a game server
+- Automatic project setup
+  - CodeGame version detection and management
+  - Create a new client
+    - Go
+  - Create a new game server
+    - Go
+  - Initialize Git
+  - Create README and LICENSE files
 
 ## Installation
 

commands/info.go

@@ -0,0 +1,99 @@
+package commands
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/code-game-project/codegame-cli/cli"
+	"github.com/code-game-project/codegame-cli/external"
+	"github.com/mattn/go-colorable"
+	"github.com/ogier/pflag"
+)
+
+type gameInfo struct {
+	Name          string `json:"name"`
+	CGVersion     string `json:"cg_version"`
+	DisplayName   string `json:"display_name"`
+	Description   string `json:"description"`
+	Version       string `json:"version"`
+	RepositoryURL string `json:"repository_url"`
+}
+
+func Info() error {
+	var url string
+	if pflag.NArg() >= 2 {
+		url = strings.ToLower(pflag.Arg(1))
+	} else {
+		var err error
+		url, err = cli.Input("Game server URL:")
+		if err != nil {
+			return err
+		}
+	}
+
+	if strings.HasPrefix(url, "http://") {
+		url = strings.TrimPrefix(url, "http://")
+	} else if strings.HasPrefix(url, "https://") {
+		url = strings.TrimPrefix(url, "https://")
+	} else if strings.HasPrefix(url, "ws://") {
+		url = strings.TrimPrefix(url, "ws://")
+	} else if strings.HasPrefix(url, "wss://") {
+		url = strings.TrimPrefix(url, "wss://")
+	}
+	url = strings.TrimSuffix(url, "/")
+
+	info, err := fetchInfo(url)
+	if err != nil {
+		return err
+	}
+
+	printInfo(info)
+	return nil
+}
+
+func printInfo(info gameInfo) {
+	out := colorable.NewColorableStdout()
+	printInfoProperty(out, "Display Name", info.DisplayName, 17)
+	printInfoProperty(out, "Name", info.Name, 17)
+	printInfoProperty(out, "Description", info.Description, 17)
+	printInfoProperty(out, "Version", info.Version, 17)
+	printInfoProperty(out, "CodeGame Version", info.CGVersion, 17)
+	printInfoProperty(out, "Repository", info.RepositoryURL, 17)
+}
+
+func printInfoProperty(out io.Writer, name, value string, labelWidth int) {
+	if value == "" {
+		return
+	}
+
+	label := name + ":"
+	if labelWidth-utf8.RuneCountInString(label) > 0 {
+		label += strings.Repeat(" ", labelWidth-utf8.RuneCountInString(label))
+	}
+
+	fmt.Fprintf(out, "\x1b[36m%s\x1b[0m %s\n", label, value)
+}
+
+func fetchInfo(url string) (gameInfo, error) {
+	url = baseURL(url, isSSL(url)) + "/info"
+	res, err := http.Get(url)
+	if err != nil || res.StatusCode != http.StatusOK {
+		return gameInfo{}, cli.Error("Couldn't access %s.", url)
+	}
+	if !external.HasContentType(res.Header, "application/json") {
+		return gameInfo{}, cli.Error("%s doesn't return JSON.", url)
+	}
+	defer res.Body.Close()
+
+	var data gameInfo
+	err = json.NewDecoder(res.Body).Decode(&data)
+	if err != nil {
+		return gameInfo{}, cli.Error("Couldn't decode /info data.")
+	}
+
+	return data, nil
+}

commands/new.go

@@ -81,7 +81,7 @@ func newServer(projectName string) error {
 		language = strings.ToLower(pflag.Arg(2))
 	} else {
 		var err error
-		language, err = cli.Select("In which language do you want to write your project?", []string{"Go"}, []string{"go"})
+		language, err = cli.Select("Language:", []string{"Go"}, []string{"go"})
 		if err != nil {
 			return err
 		}
@@ -98,7 +98,7 @@ func newServer(projectName string) error {
 }
 
 func newClient(projectName string) error {
-	url, err := cli.Input("Enter the URL of the game server:")
+	url, err := cli.Input("Game server URL:")
 	if err != nil {
 		return err
 	}
@@ -127,7 +127,7 @@ func newClient(projectName string) error {
 		language = strings.ToLower(pflag.Arg(2))
 	} else {
 		var err error
-		language, err = cli.Select("In which language do you want to write your project?", []string{"Go"}, []string{"go"})
+		language, err = cli.Select("Language", []string{"Go"}, []string{"go"})
 		if err != nil {
 			return err
 		}
@@ -157,7 +157,7 @@ func git(projectName string) error {
 		return nil
 	}
 
-	yes, err := cli.YesNo("Do you want to initialize git?", true)
+	yes, err := cli.YesNo("Initialize git?", true)
 	if err != nil {
 		os.RemoveAll(projectName)
 		return err
@@ -177,7 +177,7 @@ func git(projectName string) error {
 }
 
 func readme(projectName string) error {
-	yes, err := cli.YesNo("Create a README file?", true)
+	yes, err := cli.YesNo("Create README?", true)
 	if err != nil {
 		os.RemoveAll(projectName)
 		return err
@@ -220,7 +220,7 @@ var licenseApache string
 var licenseReadmeApache string
 
 func license(projectName string) error {
-	license, err := cli.Select("Select a license", []string{"None", "MIT", "GPLv3", "AGPL", "Apache 2.0"}, []string{"none", "MIT", "GPL", "AGPL", "Apache"})
+	license, err := cli.Select("License", []string{"None", "MIT", "GPLv3", "AGPL", "Apache 2.0"}, []string{"none", "MIT", "GPL", "AGPL", "Apache"})
 	if err != nil {
 		os.RemoveAll(projectName)
 		return err
@@ -315,9 +315,13 @@ func getCodeGameInfo(baseURL string) (string, string, error) {
 		Name      string `json:"name"`
 		CGVersion string `json:"cg_version"`
 	}
-	res, err := http.Get(baseURL + "/info")
-	if err != nil || res.StatusCode != http.StatusOK || !external.HasContentType(res.Header, "application/json") {
-		return "", "", cli.Error("Couldn't access /info endpoint.")
+	url := baseURL + "/info"
+	res, err := http.Get(url)
+	if err != nil || res.StatusCode != http.StatusOK {
+		return "", "", cli.Error("Couldn't access %s.", url)
+	}
+	if !external.HasContentType(res.Header, "application/json") {
+		return "", "", cli.Error("%s doesn't return JSON.", url)
 	}
 	defer res.Body.Close()
 

main.go

@@ -36,6 +36,8 @@ func main() {
 	switch command {
 	case "new":
 		err = commands.New()
+	case "info":
+		err = commands.Info()
 	case "docs":
 		err = external.OpenBrowser("https://docs.code-game.org")
 		if err != nil {