package main

import (
	"fmt"
	"net/http"
)

func (app *application) logRequest (next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        var (
            ip = r.RemoteAddr
            proto = r.Proto
            method = r.Method
            uri = r.URL.RequestURI()
        )
        app.logger.Info("received request", "ip", ip, "proto", proto, "method", method, "uri", uri)
        next.ServeHTTP(w, r)
    })
}

func commonHeaders (next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.Header().Set("Content-Security-Policy", "default-src 'self'; style-src 'self' fonts.googleapis.com; font-src fonts.gstatic.com")
        w.Header().Set("Referrer-Policy", "origin-when-cross-origin")
        w.Header().Set("X-Content-Type-Options", "nosniff")
        w.Header().Set("X-Frame-Options", "deny")
        w.Header().Set("X-XSS-Protection", "0")
        next.ServeHTTP(w, r)
    })
}

func (app *application) recoverPanic(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        defer func() {
            if err := recover(); err != nil {
                w.Header().Set("Connection", "close")
                app.serverError(w, r, fmt.Errorf("%s", err))
            }
        }()

        next.ServeHTTP(w, r)
    })
}