Add: Template Config options & comments;

internal/config/config.go

@@ -1,3 +1,10 @@
+// Package config provides functionality for loading application configuration from a JSON file and environment variables.
+// It defines structs for different configuration sections (database, authentication, SMTP, templates) and functions
+// to read and populate these configurations. It also generates secrets for JWT and CSRF tokens.
+//
+// This package uses the `envconfig` library to map environment variables to struct fields, falls back to variables of a config
+// file and provides functions for error handling and logging during the configuration loading process.
+
 package config
 
 import (
@@ -12,7 +19,7 @@ import (
 )
 
 type DatabaseConfig struct {
-	Path string `json:"Path" envconfig:"DB_PATH"`
+	Path string `json:"Path" default:"data/db.sqlite3" envconfig:"DB_PATH"`
 }
 
 type AuthenticationConfig struct {
@@ -25,23 +32,27 @@ type SMTPConfig struct {
 	Host       string `json:"Host" envconfig:"SMTP_HOST"`
 	User       string `json:"User" envconfig:"SMTP_USER"`
 	Password   string `json:"Password" envconfig:"SMTP_PASS"`
-	Mailtype   string `json:"Mailtype" envconfig:"MAIL_TYPE"`
+	Mailtype   string `json:"Mailtype" default:"html" envconfig:"MAIL_TYPE"`
 	AdminEmail string `json:"AdminEmail" envconfig:"ADMIN_MAIL"`
-	Port       int    `json:"Port" envconfig:"SMTP_PORT"`
+	Port       int    `json:"Port" default:"465" envconfig:"SMTP_PORT"`
 }
 
 type TemplateConfig struct {
-	MailDir string `json:"MailDir" envconfig:"TEMPLATE_DIR"`
+	MailPath   string `json:"MailPath" default:"templates/email" envconfig:"TEMPLATE_MAIL_PATH"`
+	HTMLPath   string `json:"HTMLPath" default:"templates/html" envconfig:"TEMPLATE_HTML_PATH"`
+	StaticPath string `json:"StaticPath" default:"templates/css" envconfig:"TEMPLATE_STATIC_PATH"`
 }
 
 type Config struct {
-	Auth      AuthenticationConfig `json:"auth"`
-	DB        DatabaseConfig       `json:"db"`
-	Templates TemplateConfig       `json:"templates"`
-	SMTP      SMTPConfig           `json:"smtp"`
+	ConfigFilePath string               `json:"config_file_path" envconfig:"CONFIG_FILE_PATH"`
+	Auth           AuthenticationConfig `json:"auth"`
+	DB             DatabaseConfig       `json:"db"`
+	Templates      TemplateConfig       `json:"templates"`
+	SMTP           SMTPConfig           `json:"smtp"`
 }
 
 var (
+	CFGPath   string
 	CFG       Config
 	Auth      AuthenticationConfig
 	DB        DatabaseConfig
@@ -49,7 +60,11 @@ var (
 	SMTP      SMTPConfig
 )
 
+// LoadConfig initializes the configuration by reading from a file and environment variables.
+// It also generates JWT and CSRF secrets. Returns a Config pointer or an error if any step fails.
 func LoadConfig() {
+	CFGPath = os.Getenv("CONFIG_FILE_PATH")
+	logger.Info.Printf("Config file environment: %v", CFGPath)
 	readFile(&CFG)
 	readEnv(&CFG)
 	csrfSecret, err := utils.GenerateRandomString(32)
@@ -70,13 +85,19 @@ func LoadConfig() {
 	SMTP = CFG.SMTP
 }
 
+// readFile reads the configuration from the specified file path into the provided Config struct.
+// If the file path is empty, it defaults to "configs/config.json" in the current working directory.
+// Returns an error if the file cannot be opened or the JSON cannot be decoded.
 func readFile(cfg *Config) {
-	path, err := os.Getwd()
-	if err != nil {
-		logger.Error.Fatalf("could not get working directory: %v", err)
+	if CFGPath == "" {
+		path, err := os.Getwd()
+		if err != nil {
+			logger.Error.Fatalf("could not get working directory: %v", err)
+		}
+		CFGPath = filepath.Join(path, "configs", "config.json")
 	}
 
-	configFile, err := os.Open(filepath.Join(path, "configs", "config.json"))
+	configFile, err := os.Open(CFGPath)
 	// configFile, err := os.Open("config.json")
 	if err != nil {
 		logger.Error.Fatalf("could not open config file: %v", err)
@@ -90,6 +111,8 @@ func readFile(cfg *Config) {
 	}
 }
 
+// readEnv populates the Config struct with values from environment variables using the envconfig package.
+// Returns an error if environment variable decoding fails.
 func readEnv(cfg *Config) {
 	err := envconfig.Process("", cfg)
 	if err != nil {