Added initial Settings

internal/database/setting.go

@@ -0,0 +1,65 @@
+package database
+
+import (
+	"database/sql"
+)
+
+type Setting struct {
+	Name    string
+	Value   string
+	Default string
+}
+
+func NewSetting(name string, defaultValue string) Setting {
+	return Setting{
+		Name:    name,
+		Value:   defaultValue,
+		Default: defaultValue,
+	}
+}
+
+func initSettings(settings *DbTable[string, Setting]) {
+	addSettingIfNotExists(NewSetting("theme", "white"), settings)
+	addSettingIfNotExists(NewSetting("order", "title"), settings)
+}
+
+func addSettingIfNotExists(setting Setting, settings *DbTable[string, Setting]) {
+	_, exists := settings.Get(setting.Name)
+	if !exists {
+		settings.Set(setting.Name, setting)
+	}
+}
+
+func updateSetting(db *sql.DB, s *Setting) error {
+	const cmd = "UPDATE Setting set Value = ? WHERE Name = ?"
+	_, err := db.Exec(cmd, s.Value, s.Name)
+	return err
+}
+
+func insertSetting(db *sql.DB, s *Setting) error {
+	const cmd = "INSERT INTO Setting(Name, Value, DefaultValue) VALUES(?, ?, ?)"
+	_, err := db.Exec(cmd, s.Name, s.Value, s.Default)
+	return err
+}
+
+func loadSettings(db *sql.DB) (map[string]Setting, error) {
+	const cmd = "SELECT Name, Value, DefaultValue from Setting"
+	rows, err := db.Query(cmd)
+
+	res := make(map[string]Setting)
+
+	for rows.Next() {
+		setting := Setting{}
+		if err = rows.Scan(&setting.Name, &setting.Value, &setting.Default); err != nil {
+			return nil, err
+		}
+		res[setting.Name] = setting
+	}
+	return res, err
+}
+
+func deleteSetting(db *sql.DB, key string) error {
+	const cmd = "UPDATE Setting set Value = DefaultValue WHERE Name = ?"
+	_, err := db.Exec(cmd, key)
+	return err
+}