feat: add config utils functions to handle config fetching and updating

src/cmd/utils/config.go

@@ -0,0 +1,176 @@
+package utils
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+var ConfigVar *Config
+
+var (
+	defaultConfigLocations = []string{
+		"",
+		os.Getenv("HOME") + "/.config/cocommit",
+		os.Getenv("HOME") + "/cocommit",
+		"/etc/cocommit",
+		"/usr/local/etc/cocommit",
+	}
+	configName = "config"
+	configType = "toml"
+)
+
+type Config struct {
+	Settings struct {
+		AuthorFile    string `mapstructure:"author_file"`
+		StartingScope string `mapstructure:"starting_scope"`
+		Editor        string `mapstructure:"editor"`
+	} `mapstructure:"settings"`
+}
+
+func init() {
+	configDir, err := os.UserConfigDir()
+	if err == nil {
+		defaultConfigLocations[0] = filepath.Join(configDir, "cocommit")
+	}
+}
+
+func LoadConfig() (*Config, error) {
+	v := viper.New()
+	v.SetConfigName(configName)
+	v.SetConfigType(configType)
+
+	// Set default values
+	v.SetDefault("settings.author_file", defaultConfigLocations[0]+"/authors.json")
+	v.SetDefault("settings.starting_scope", "git")
+	v.SetDefault("settings.editor", "built-in")
+
+	// Add search paths
+	for _, path := range defaultConfigLocations {
+		if path != "" {
+			v.AddConfigPath(path)
+		}
+	}
+
+	// Try to read config
+	if err := v.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			if err := handleMissingConfig(v); err != nil {
+				return nil, err
+			}
+		} else {
+			return nil, fmt.Errorf("config error: %w", err)
+		}
+	}
+
+	var cfg Config
+	if err := v.Unmarshal(&cfg); err != nil {
+		return nil, fmt.Errorf("config unmarshal error: %w", err)
+	}
+	if cfg.Settings.AuthorFile == "" {
+		cfg.Settings.AuthorFile = defaultConfigLocations[0] + "/authors.json"
+	}
+
+	return &cfg, nil
+}
+
+func (c *Config) SetGlobalConfig() {
+	if ConfigVar == nil {
+		ConfigVar = c
+		// This doesnt really do much right now but might be useful later
+		viper.WatchConfig()
+	} 
+}
+
+func handleMissingConfig(v *viper.Viper) error {
+	fmt.Println("Config file not found. Would you like to create one? (y/n)")
+	var response string
+	if _, err := fmt.Scanln(&response); err != nil {
+		return fmt.Errorf("error reading response: %w", err)
+	}
+
+	yesResponses := map[string]bool{"y": true, "Y": true, "yes": true, "Yes": true, "YES": true}
+	if !yesResponses[strings.TrimSpace(response)] {
+		return fmt.Errorf("config file not found")
+	}
+
+	return createConfig(v)
+}
+
+func createConfig(v *viper.Viper) error {
+	fmt.Println("Where would you like to create the config file?")
+	for i, path := range defaultConfigLocations {
+		fmt.Printf("%d. %s\n", i, path)
+	}
+	fmt.Println("Please enter the number of the location or a custom path:")
+
+	var response string
+	if _, err := fmt.Scanln(&response); err != nil {
+		return fmt.Errorf("error reading response: %w", err)
+	}
+
+	var configPath string
+	if num, err := strconv.Atoi(response); err == nil && num >= 0 && num < len(defaultConfigLocations) {
+		configPath = defaultConfigLocations[num]
+	} else {
+		configPath = response
+	}
+
+	// Ensure directory exists
+	if err := os.MkdirAll(configPath, 0755); err != nil {
+		return fmt.Errorf("failed to create config directory: %w", err)
+	}
+
+	// Set the config file path
+	fullPath := filepath.Join(configPath, fmt.Sprintf("%s.%s", configName, configType))
+	v.SetConfigFile(fullPath)
+
+	// Write default config
+	if err := v.SafeWriteConfig(); err != nil {
+		return fmt.Errorf("failed to write config: %w", err)
+	}
+
+	fmt.Printf("Config file created at: %s\n", fullPath)
+	return nil
+}
+
+func (c *Config) Save() error {
+    v := viper.New()
+    
+    // Set all configuration values from the struct
+    v.Set("settings.author_file", c.Settings.AuthorFile)
+    v.Set("settings.starting_scope", c.Settings.StartingScope)
+    v.Set("settings.editor", c.Settings.Editor)
+    
+    v.SetConfigName(configName)
+    v.SetConfigType(configType)
+    
+    // Try to determine the original config file location
+    if viper.ConfigFileUsed() != "" {
+        v.SetConfigFile(viper.ConfigFileUsed())
+    } else {
+        // Fall back to first default location if no existing config
+        if len(defaultConfigLocations) > 0 && defaultConfigLocations[0] != "" {
+            v.SetConfigFile(filepath.Join(defaultConfigLocations[0], fmt.Sprintf("%s.%s", configName, configType)))
+        } else {
+            return fmt.Errorf("no config file location available")
+        }
+    }
+    
+    // Ensure the directory exists
+    configDir := filepath.Dir(v.ConfigFileUsed())
+    if err := os.MkdirAll(configDir, 0755); err != nil {
+        return fmt.Errorf("failed to create config directory: %w", err)
+    }
+    
+    // Write the config file
+    if err := v.WriteConfig(); err != nil {
+        return fmt.Errorf("failed to save config: %w", err)
+    }
+    
+    return nil
+}