65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
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package settings
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import "strings"
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const (
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MinReadingSpeed = 100
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MaxReadingSpeed = 1000
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MinFontSize = 24
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MaxFontSize = 96
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ThemeDark = "dark"
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ThemeLight = "light"
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)
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// Settings contains user preferences.
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type Settings struct {
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ReadingSpeed int `json:"readingSpeed"`
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FontSize int `json:"fontSize"`
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Theme string `json:"theme"`
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}
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// Default returns the default application settings.
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func Default() Settings {
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return Settings{
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ReadingSpeed: 300,
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FontSize: 48,
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Theme: ThemeDark,
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}
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}
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// Validate checks whether all settings contain supported values.
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func (s Settings) Validate() bool {
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return s.ReadingSpeed >= MinReadingSpeed &&
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s.ReadingSpeed <= MaxReadingSpeed &&
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s.FontSize >= MinFontSize &&
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s.FontSize <= MaxFontSize &&
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(s.Theme == ThemeDark || s.Theme == ThemeLight)
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}
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// Normalize returns settings with values restricted to supported options.
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func (s Settings) Normalize() Settings {
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defaults := Default()
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if s.ReadingSpeed < MinReadingSpeed {
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s.ReadingSpeed = MinReadingSpeed
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} else if s.ReadingSpeed > MaxReadingSpeed {
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s.ReadingSpeed = MaxReadingSpeed
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}
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if s.FontSize < MinFontSize {
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s.FontSize = MinFontSize
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} else if s.FontSize > MaxFontSize {
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s.FontSize = MaxFontSize
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}
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s.Theme = strings.ToLower(strings.TrimSpace(s.Theme))
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if s.Theme != ThemeDark && s.Theme != ThemeLight {
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s.Theme = defaults.Theme
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}
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return s
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}
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