package main

import (
	"encoding/json"
	"log"
	"net/http"
)

// AreProcessesUp sends back status of watched processes.
func AreProcessesUp(processes *[]Process) func(http.ResponseWriter, *http.Request) {
	return func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet {
			w.WriteHeader(http.StatusMethodNotAllowed)
			w.Header().Add("Allow", "GET")
			return
		}

		w.Header().Add("Content-Type", "application/json")
		if err := json.NewEncoder(w).Encode(GetProcessesState(processes)); err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			log.Printf("Failed to encode a process list: %s\n", err)
		}
	}
}