config.go


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package main

import (
	"encoding/json"
	"net/netip"
	"os"
	"log"
)

type RuntimeConfig struct {
	Devices DevicesConfig
	Web     WebConfig
}

type DevicesConfig struct {
	Hs100 []Hs100Conf
}

type WebConfig struct {
	Listen netip.AddrPort
}

// parseConfig() parses and validates the runtime configuration file and
// returns it as Go datastructure.
func parseConfig(path string) RuntimeConfig {
	data, err := os.ReadFile(path)
	if err != nil {
		log.Fatalf("Could not read '%s'!", path)
	}

	if !json.Valid(data) {
		log.Fatalf("%s contains invalid JSON!", path)
	}

	config := RuntimeConfig{}
	err = json.Unmarshal(data, &config)
	if err != nil {
		log.Fatalf("Could not parse configuration file:\n%s\n", err)
	}

	return config
}