Added logic to open sqlite database

main.go

@@ -1,11 +1,15 @@
 package main
 
 import (
+	"database/sql"
 	"fmt"
-	toml "github.com/pelletier/go-toml/v2"
 	"io/ioutil"
 	"os"
 	"path/filepath"
+
+	_ "github.com/mattn/go-sqlite3"
+
+	toml "github.com/pelletier/go-toml/v2"
 )
 
 type Config struct {
@@ -86,6 +90,36 @@ func get_config(config_dir string) (*Config, error) {
 
 }
 
+func get_data_dir() string {
+	// Find data directory
+
+	// Linux (XDG base directory specification compliant)
+	xdg_data_home := os.Getenv("XDG_DATA_HOME")
+
+	if xdg_data_home != "" {
+		return filepath.Join(xdg_data_home, "ikinuki")
+	} else {
+		home := os.Getenv("HOME")
+		return filepath.Join(home, ".local", "share", "ikinuki")
+	}
+}
+
+func open_database(data_dir string) (*sql.DB, error) {
+	err := os.MkdirAll(data_dir, 0755)
+	if err != nil {
+		return nil, fmt.Errorf("ERROR: could not create data directory: %v", err)
+	}
+
+	db_path := filepath.Join(data_dir, "ikinuki-server.db")
+
+	db, err := sql.Open("sqlite3", db_path)
+	if err != nil {
+		return nil, fmt.Errorf("ERROR: could not open database: %v", err)
+	}
+
+	return db, nil
+}
+
 func scan_directory(directory string) {
 	files, err := ioutil.ReadDir(directory)
 	if err != nil {
@@ -114,6 +148,10 @@ func main() {
 	}
 	fmt.Printf("Config: %v\n", config)
 
+	data_dir := get_data_dir()
+
+	open_database(data_dir)
+
 	scan_directory(config.ScanDirectory)
 
 }