Enhance configuration to support loading IMAP password and OpenRouter API key from files, and update README with new settings

README.md

@@ -46,12 +46,18 @@ The application uses a YAML configuration file (`config.yaml`) with the followin
 - `server`: IMAP server hostname (e.g., "imap.gmail.com")
 - `port`: IMAP port (typically 993 for TLS)
 - `username`: Your email address
-- `password`: Email password (use ${IMAP_PASSWORD} to load from environment)
+- `password`: Email password (use ${IMAP_PASSWORD} to load from environment or file:///path/to/password.txt to read from file)
 - `mailbox_in`: Mailbox to check for new emails (e.g., "INBOX")
 - `draft_box`: Folder to save AI-generated drafts (e.g., "Drafts")
 - `processed_box`: Folder to move processed emails to (they will also be marked as read)
 - `use_tls`: Whether to use TLS for connection (recommended: true)
 
+### AI Settings
+- `openrouter_api_key`: Your OpenRouter API key (use ${OPENROUTER_API_KEY} to load from environment or file:///path/to/key.txt to read from file)
+- `model`: The AI model to use (e.g., "anthropic/claude-2")
+- `temperature`: Response randomness (0.0-1.0)
+- `max_tokens`: Maximum response length
+
 ```yaml
 imap:
   server: "imap.example.com"

config.yaml.example

@@ -2,14 +2,14 @@ imap:
   server: "imap.gmail.com"  # Example for Gmail
   port: 993
   username: "your-email@gmail.com"
-  password: "${IMAP_PASSWORD}"  # Will be read from environment variable
+  password: "${IMAP_PASSWORD}"  # From environment variable, or use "file:///path/to/password.txt"
   mailbox_in: "INBOX"
   draft_box: "Drafts"
   processed_box: "Processed"  # Folder where processed emails will be moved
   use_tls: true
 
 ai:
-  openrouter_api_key: "${OPENROUTER_API_KEY}"  # Will be read from environment variable
+  openrouter_api_key: "${OPENROUTER_API_KEY}"  # From environment variable, or use "file:///path/to/api-key.txt"
   model: "anthropic/claude-2"  # Other options: "openai/gpt-4", "google/palm-2"
   temperature: 0.7  # 0.0 to 1.0, lower for more focused responses
   max_tokens: 2000  # Adjust based on your needs and model limits

config/config.go

@@ -49,6 +49,14 @@ type LoggingConfig struct {
 	FilePath string `yaml:"file_path"`
 }
 
+func readFileContent(path string) (string, error) {
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(content)), nil
+}
+
 func Load(path string) (*Config, error) {
 	logger.WithField("path", path).Debug("Loading configuration file")
 
@@ -65,17 +73,36 @@ func Load(path string) (*Config, error) {
 		return nil, err
 	}
 
-	// Resolve environment variables in configuration
+	// Handle IMAP password from environment or file
 	if strings.HasPrefix(config.IMAP.Password, "${") && strings.HasSuffix(config.IMAP.Password, "}") {
 		envVar := strings.TrimSuffix(strings.TrimPrefix(config.IMAP.Password, "${"), "}")
 		config.IMAP.Password = os.Getenv(envVar)
 		logger.WithField("envVar", envVar).Debug("Resolved IMAP password from environment")
+	} else if strings.HasPrefix(config.IMAP.Password, "file://") {
+		filePath := strings.TrimPrefix(config.IMAP.Password, "file://")
+		password, err := readFileContent(filePath)
+		if err != nil {
+			logger.WithError(err).Error("Failed to read IMAP password from file")
+			return nil, err
+		}
+		config.IMAP.Password = password
+		logger.WithField("path", filePath).Debug("Read IMAP password from file")
 	}
 
+	// Handle OpenRouter API key from environment or file
 	if strings.HasPrefix(config.AI.OpenRouterAPIKey, "${") && strings.HasSuffix(config.AI.OpenRouterAPIKey, "}") {
 		envVar := strings.TrimSuffix(strings.TrimPrefix(config.AI.OpenRouterAPIKey, "${"), "}")
 		config.AI.OpenRouterAPIKey = os.Getenv(envVar)
 		logger.WithField("envVar", envVar).Debug("Resolved OpenRouter API key from environment")
+	} else if strings.HasPrefix(config.AI.OpenRouterAPIKey, "file://") {
+		filePath := strings.TrimPrefix(config.AI.OpenRouterAPIKey, "file://")
+		apiKey, err := readFileContent(filePath)
+		if err != nil {
+			logger.WithError(err).Error("Failed to read OpenRouter API key from file")
+			return nil, err
+		}
+		config.AI.OpenRouterAPIKey = apiKey
+		logger.WithField("path", filePath).Debug("Read OpenRouter API key from file")
 	}
 
 	logger.WithFields(logrus.Fields{