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package frontend
import (
"embed"
"io/fs"
"net/http"
"donetick.com/core/config"
"github.com/gin-gonic/gin"
)
//go:embed dist
var embeddedFiles embed.FS
type Handler struct {
ServeFrontend bool
}
func NewHandler(config *config.Config) *Handler {
return &Handler{
ServeFrontend: config.Server.ServeFrontend,
}
}
func Routes(router *gin.Engine, h *Handler) {
// this whole logic is walkaround for serving frontend files
// TODO: figure out better way to improve it. main issue i run into is failing over to index.html when file does not exist
if h.ServeFrontend {
// if file exists in dist folder, serve it
router.Use(staticMiddleware("dist"))
// if file does not exist in dist folder fallback to index.html
router.NoRoute(staticMiddlewareNoRoute("dist"))
}
}
func staticMiddleware(root string) gin.HandlerFunc {
fileServer := http.FileServer(getFileSystem(root))
return func(c *gin.Context) {
_, err := fs.Stat(embeddedFiles, "dist"+c.Request.URL.Path)
if err != nil {
c.Next()
return
}
fileServer.ServeHTTP(c.Writer, c.Request)
}
}
func staticMiddlewareNoRoute(root string) gin.HandlerFunc {
fileServer := http.FileServer(getFileSystem(root))
// always serve index.html for any route does not match:
return func(c *gin.Context) {
// Rewrite all requests to serve index.html
c.Request.URL.Path = "/"
fileServer.ServeHTTP(c.Writer, c.Request)
}
}
func getFileSystem(path string) http.FileSystem {
fs, err := fs.Sub(embeddedFiles, path)
if err != nil {
panic(err)
}
return http.FS(fs)
}
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