From a0845730892654bd2fa3cf15217c1783e04cfcb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=96mer=20=C3=9Cst=C3=BCn?= <omerberatustun@gmail.com>
Date: Tue, 15 Aug 2023 20:22:26 +0300
Subject: [PATCH] Add language selection and help options

- Introduced `-lang` flag allowing users to specify their desired programming language for the random repo.
- Added `-h` flag to display the help text and provide users with usage information.
- Included validation for the provided language, ensuring it's one of the supported languages.
---
 README.md | 27 +++++++++++++++++++++------
 main.go   | 28 ++++++++++++++++++++++++++--
 2 files changed, 47 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index b73bfee..f4da72c 100644
--- a/README.md
+++ b/README.md
@@ -6,10 +6,12 @@ Discover a random GitHub repository from popular programming languages with just
 Features
 --------
 
-*   Randomly selects from popular programming languages.
+*   Randomly selects from popular programming languages or allows you to specify a language of your choice.
 *   Fetches repositories sorted by the latest commit.
 *   Provides a simple command-line interface.
 *   Configurable via a JSON configuration file.
+*   Option to select a specific programming language using the `-lang` flag.
+*   View the help text and options using the `-h` flag.
 
 Prerequisites
 -------------
@@ -21,7 +23,6 @@ Installation
 
 1.  Clone this repository:
     
-
     
     ```bash
     git clone https://github.com/omerbustun/git-lucky.git
@@ -29,7 +30,6 @@ Installation
     
 2.  Navigate to the cloned directory and build the project:
     
-
     
     ```bash
     go build
@@ -37,7 +37,7 @@ Installation
     
 3.  Run `git-lucky`:
     
-
+    
     ```bash
     ./git-lucky
     ```
@@ -48,7 +48,7 @@ Configuration
 
 1.  Copy the sample configuration file:
     
-
+    
     ```bash
     cp config.sample.json config.json
     ```
@@ -68,10 +68,25 @@ Usage
 
 Simply run:
 
+
 ```bash
 ./git-lucky
 ```
 
+To specify a language:
+
+
+```bash
+./git-lucky -lang=Python
+```
+
+For help:
+
+
+```bash
+./git-lucky -h
+```
+
 Contributing
 ------------
 
@@ -80,4 +95,4 @@ Pull requests are welcome. For major changes, please open an issue first to disc
 License
 -------
 
-This project is licensed under the GNU General Public License, version 3 (GPLv3). See the [LICENSE](LICENSE) file for the full license text.
+This project is licensed under the GNU General Public License, version 3 (GPLv3). See the [LICENSE](LICENSE) file for the full license text.
\ No newline at end of file
diff --git a/main.go b/main.go
index 76b45e5..bb6bc11 100644
--- a/main.go
+++ b/main.go
@@ -34,9 +34,17 @@ func LoadConfig(filePath string) (Config, error) {
 func main() {
 	rand.Seed(time.Now().UnixNano())
 
+	var language string
 	configPath := flag.String("config", "config.json", "Path to the configuration file")
+	flag.StringVar(&language, "lang", "", "Specify the programming language (e.g. Go, Python, JavaScript). If not specified, a random language will be chosen.")
+	help := flag.Bool("h", false, "Display the help text.")
 	flag.Parse()
 
+	if *help {
+		flag.Usage()
+		return
+	}
+
 	config, err := LoadConfig(*configPath)
 	if err != nil {
 		fmt.Printf("Error loading configuration: %s\n", err)
@@ -48,11 +56,27 @@ func main() {
 	}
 
 	languages := []string{"Python", "JavaScript", "Ruby", "Go", "Java", "C++", "TypeScript", "PHP", "C#", "Swift", "Kotlin", "Rust", "R", "Scala", "Perl", "Objective-C", "Lua", "Shell", "Haskell", "Dart"}
-	randomLanguage := languages[rand.Intn(len(languages))]
+
+	if language != "" {
+		validLanguage := false
+		for _, validLang := range languages {
+			if validLang == language {
+				validLanguage = true
+				break
+			}
+		}
+
+		if !validLanguage {
+			fmt.Printf("Error: Invalid language specified. Please choose from: %v\n", languages)
+			return
+		}
+	} else {
+		language = languages[rand.Intn(len(languages))]
+	}
 
 	randomPage := rand.Intn(10) + 1
 
-	apiURL := fmt.Sprintf("https://api.github.com/search/repositories?q=language:%s&sort=updated&order=desc&per_page=100&page=%d", randomLanguage, randomPage)
+	apiURL := fmt.Sprintf("https://api.github.com/search/repositories?q=language:%s&sort=updated&order=desc&per_page=100&page=%d", language, randomPage)
 
 	req, err := http.NewRequest("GET", apiURL, nil)
 	if err != nil {