Add configuration and logging modules with TOML support

- Implement configuration management in the config package
- Define constants and types for server and mailbox configurations
- Create functions for loading and parsing configuration files
- Introduce logging functionality with customizable log levels and formats
- Add error handling and messages for configuration and logging operations
- Include TOML utilities for default value application and content marshaling

1 files changed, 36 insertions, 0 deletions

diff --git a/config/config.go b/config/config.go
new file mode 100644
index 0000000..358fe72
--- /dev/null
+++ b/config/config.go
@@ -0,0 +1,36 @@
+package config
+
+import (
+	"dove/messages"
+	"dove/utils/logger"
+)
+
+var (
+	IMAP    imap
+	Mailbox mailbox
+	POP3    pop3
+	Server  server
+	SMTP    smtp
+)
+
+var (
+	DataDir string
+	DevMode bool
+)
+
+func init() {
+	DevMode = isDevelopmentMode()
+	osConfigDirectory := resolveOSConfigDirectory()
+	DataDir = resolveDataDirectory(DevMode, osConfigDirectory)
+
+	configFilePath := resolveConfigFilePath(DevMode, osConfigDirectory)
+	if loadError := loadConfigFile(configFilePath); loadError != nil {
+		logger.Fatalf(LOG_PREFIX, messages.ConfigFileLoadFailed, loadError)
+	}
+
+	for _, section := range []any{&Server, &SMTP, &IMAP, &POP3, &Mailbox} {
+		if parseError := parseSection(section); parseError != nil {
+			logger.Fatalf(LOG_PREFIX, messages.ConfigSectionParseFailed, parseError)
+		}
+	}
+}