feat: system api with profiles

common/profile.go

@@ -0,0 +1,68 @@
+package common
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+type Profile struct {
+	// Mode can be "release" or "dev"
+	Mode string `json:"mode"`
+	// Port is the binding port for server.
+	Port int `json:"port"`
+	// DSN points to where Memos stores its own data
+	DSN string `json:"-"`
+}
+
+func checkDSN(dataDir string) (string, error) {
+	// Convert to absolute path if relative path is supplied.
+	if !filepath.IsAbs(dataDir) {
+		absDir, err := filepath.Abs(filepath.Dir(os.Args[0]) + "/" + dataDir)
+		if err != nil {
+			return "", err
+		}
+		dataDir = absDir
+	}
+
+	// Trim trailing / in case user supplies
+	dataDir = strings.TrimRight(dataDir, "/")
+
+	if _, err := os.Stat(dataDir); err != nil {
+		error := fmt.Errorf("unable to access -data %s, err %w", dataDir, err)
+		return "", error
+	}
+
+	return dataDir, nil
+}
+
+// GetDevProfile will return a profile for dev.
+func GetProfile() Profile {
+	mode := os.Getenv("mode")
+	if mode != "dev" && mode != "release" {
+		mode = "dev"
+	}
+
+	port, err := strconv.Atoi(os.Getenv("port"))
+	if err != nil {
+		port = 8080
+	}
+
+	data := os.Getenv("data")
+
+	dataDir, err := checkDSN(data)
+	if err != nil {
+		fmt.Printf("Failed to check dsn: %s, err: %+v\n", dataDir, err)
+		os.Exit(1)
+	}
+
+	dsn := fmt.Sprintf("file:%s/memos_%s.db", dataDir, mode)
+
+	return Profile{
+		Mode: mode,
+		Port: port,
+		DSN:  dsn,
+	}
+}