Initial commit

go.mod

@@ -0,0 +1,3 @@
+module k3gtpi.jumpingcrab.com/go-learning/gator_rss
+
+go 1.24.5

internal/config/config.go

@@ -0,0 +1,65 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+type Config struct {
+	DBURL           string `json:"db_url"`
+	CurrentUsername string `json:"current_user_name"`
+}
+
+func getConfigFilePath() (string, error) {
+	const configFileName = ".gatorconfig.json"
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	configFilePath := homeDir + "/" + configFileName
+	return configFilePath, nil
+}
+
+func write(cfg *Config) error {
+	configFilePath, err := getConfigFilePath()
+	if err != nil {
+		return err
+	}
+	configPretty, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(configFilePath, configPretty, 0644)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (cfg *Config) Read() Config {
+	configFilePath, err := getConfigFilePath()
+	if err != nil {
+		panic(err)
+	}
+	configFile, err := os.ReadFile(configFilePath)
+	if err != nil {
+		panic(err)
+	}
+	var configData Config
+	if err := json.Unmarshal(configFile, &configData); err != nil {
+		panic(err)
+	}
+	return configData
+}
+
+func (cfg *Config) SetUser(userName string) error {
+	if userName == "" {
+		return fmt.Errorf("username cannot be empty string")
+	}
+	cfg.CurrentUsername = userName
+	if err := write(cfg); err != nil {
+		return fmt.Errorf("could not set current user! Err: %w", err)
+	}
+	return nil
+}

main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"k3gtpi.jumpingcrab.com/go-learning/gator_rss/internal/config"
+)
+
+func main() {
+	configData := config.Config{}
+	configData = configData.Read()
+	configData.SetUser("vlad")
+	configData = configData.Read()
+	prettyConfig, _ := json.MarshalIndent(configData, "", "")
+	fmt.Print(string(prettyConfig))
+}