lodestone-fetcher/main.go

package main

import (
	"encoding/json"
	"errors"
	"fmt"
	"log"
	"os"
	"path"
	"strconv"
	"time"

	"github.com/karashiiro/bingode"
	"github.com/xivapi/godestone/v2"
)

const CachePath = "./.cache"

type CacheRecord struct {
	Time time.Time `json:"time"`
	Data string    `json:"data"`
}
type Cache map[uint32]CacheRecord

func main() {
	err := os.MkdirAll(CachePath, 0755)
	if err != nil {
		log.Fatal(err)
	}

	raw_cache, err := os.ReadFile(path.Join(CachePath, "cache.json"))
	var cache Cache

	if errors.Is(err, os.ErrNotExist) {
		cache = make(Cache)
	} else if err == nil {
		err := json.Unmarshal(raw_cache, &cache)
		if err != nil {
			log.Fatalln(err)
		}
	} else {
		log.Fatalln(err)
	}

	args := os.Args[1:]

	for _, arg := range args {
		id_64, err := strconv.ParseUint(arg, 10, 32)
		if err != nil {
			log.New(os.Stderr, "", 0).Println(err)
			os.Exit(2)
		}

		id := uint32(id_64)

		// bingle: 29932586
		// dialus: 44540671
		data, ok := cache[id]
		if !ok || time.Now().After(data.Time.Add(time.Minute*10)) {
			cache[id] = refetch_data(id)
			data = cache[id]
		}

		cache_as_stored, err := json.Marshal(cache)
		if err != nil {
			log.Fatalln(err)
		}

		err = os.WriteFile(path.Join(CachePath, "cache.json"), cache_as_stored, 0755)
		if err != nil {
			log.Fatalln(err)
		}
		fmt.Printf("%s\n", data.Data)
	}
}

func refetch_data(id uint32) CacheRecord {
	log.New(os.Stderr, "", 0).Printf("Fetching fresh data for %d\n", id)
	s := godestone.NewScraper(bingode.New(), godestone.EN)

	c, err := s.FetchCharacter(id)
	if err != nil {
		log.Fatalln(err)
	}

	raw_data, _ := json.Marshal(c.ClassJobs)
	return CacheRecord{Time: time.Now(), Data: string(raw_data)}
}