Add a middleware for detecting the OS default color scheme
- commit
- df854cd2fb72d1362ad614392acbd6f3d01b8573
- author
- bnema · · 2023-09-05 04:48 UTC
- parent
- 33c55a0
- signature
- unsigned
1 file · +38 -0
A internal/http/middlewares/detect-color-scheme.go +38 -0
| @@ -0,0 +1,38 @@ | |||
| 1 | + | package middlewares | |
| 2 | + | ||
| 3 | + | import ( | |
| 4 | + | "github.com/labstack/echo-contrib/session" | |
| 5 | + | "github.com/labstack/echo/v4" | |
| 6 | + | ) | |
| 7 | + | ||
| 8 | + | // ColorSchemeKey is a key for setting and getting the color scheme from the context | |
| 9 | + | const ColorSchemeKey = "CurrentColorScheme" | |
| 10 | + | ||
| 11 | + | // ColorSchemeDetectionMiddleware detects the current color scheme and sets it in the context | |
| 12 | + | func ColorSchemeDetectionMiddleware(next echo.HandlerFunc) echo.HandlerFunc { | |
| 13 | + | return func(c echo.Context) error { | |
| 14 | + | colorScheme := detectCurrentColorScheme(c) | |
| 15 | + | c.Set(ColorSchemeKey, colorScheme) | |
| 16 | + | return next(c) | |
| 17 | + | } | |
| 18 | + | } | |
| 19 | + | ||
| 20 | + | func detectCurrentColorScheme(c echo.Context) string { | |
| 21 | + | // Check if the color scheme key is set in the session storage | |
| 22 | + | sess, err := session.Get("session", c) | |
| 23 | + | if err != nil { | |
| 24 | + | // If session storage is not available, proceed with "Sec-CH-Prefers-Color-Scheme" header detection | |
| 25 | + | return "light" | |
| 26 | + | } | |
| 27 | + | ||
| 28 | + | if colorSchemeValue, ok := sess.Values["colorScheme"]; ok && colorSchemeValue != nil { | |
| 29 | + | return colorSchemeValue.(string) // Return the color scheme value from the session storage | |
| 30 | + | } | |
| 31 | + | ||
| 32 | + | // If color scheme key is not set, proceed with "Sec-CH-Prefers-Color-Scheme" header detection | |
| 33 | + | header := c.Request().Header.Get("Sec-CH-Prefers-Color-Scheme") | |
| 34 | + | if header == "dark" { | |
| 35 | + | return "dark" | |
| 36 | + | } | |
| 37 | + | return "light" // Default to light mode | |
| 38 | + | } | |
| @@ -0,0 +1,38 @@ | |||||
| 1 | + | package middlewares | |||
| 2 | + | ||||
| 3 | + | import ( | |||
| 4 | + | "github.com/labstack/echo-contrib/session" | |||
| 5 | + | "github.com/labstack/echo/v4" | |||
| 6 | + | ) | |||
| 7 | + | ||||
| 8 | + | // ColorSchemeKey is a key for setting and getting the color scheme from the context | |||
| 9 | + | const ColorSchemeKey = "CurrentColorScheme" | |||
| 10 | + | ||||
| 11 | + | // ColorSchemeDetectionMiddleware detects the current color scheme and sets it in the context | |||
| 12 | + | func ColorSchemeDetectionMiddleware(next echo.HandlerFunc) echo.HandlerFunc { | |||
| 13 | + | return func(c echo.Context) error { | |||
| 14 | + | colorScheme := detectCurrentColorScheme(c) | |||
| 15 | + | c.Set(ColorSchemeKey, colorScheme) | |||
| 16 | + | return next(c) | |||
| 17 | + | } | |||
| 18 | + | } | |||
| 19 | + | ||||
| 20 | + | func detectCurrentColorScheme(c echo.Context) string { | |||
| 21 | + | // Check if the color scheme key is set in the session storage | |||
| 22 | + | sess, err := session.Get("session", c) | |||
| 23 | + | if err != nil { | |||
| 24 | + | // If session storage is not available, proceed with "Sec-CH-Prefers-Color-Scheme" header detection | |||
| 25 | + | return "light" | |||
| 26 | + | } | |||
| 27 | + | ||||
| 28 | + | if colorSchemeValue, ok := sess.Values["colorScheme"]; ok && colorSchemeValue != nil { | |||
| 29 | + | return colorSchemeValue.(string) // Return the color scheme value from the session storage | |||
| 30 | + | } | |||
| 31 | + | ||||
| 32 | + | // If color scheme key is not set, proceed with "Sec-CH-Prefers-Color-Scheme" header detection | |||
| 33 | + | header := c.Request().Header.Get("Sec-CH-Prefers-Color-Scheme") | |||
| 34 | + | if header == "dark" { | |||
| 35 | + | return "dark" | |||
| 36 | + | } | |||
| 37 | + | return "light" // Default to light mode | |||
| 38 | + | } | |||