feat: write gohbem masterfile to cache

decoder/main.go

@@ -2,8 +2,10 @@ package decoder
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"math"
+	"os"
 	"strconv"
 	"sync"
 	"time"
@@ -197,7 +199,15 @@ func InitialiseOhbem() {
 		}
 
 		if err := o.FetchPokemonData(); err != nil {
-			log.Errorf("ohbem.FetchPokemonData: %s", err)
+			if err2 := o.LoadPokemonData("cache/master-latest-basics.json"); err2 != nil {
+				log.Errorf("ohbem.FetchPokemonData failed. ohbme.LoadPokemonData failed: %s", err2)
+			} else {
+				log.Warnf("ohbem.FetchPokemonData failed, loaded from cache: %s", err)
+			}
+		}
+
+		if o.PokemonData.Initialized == true {
+			writePokemonDataIntoCache(&o.PokemonData)
 		}
 
 		_ = o.WatchPokemonData()
@@ -206,6 +216,32 @@ func InitialiseOhbem() {
 	}
 }
 
+func writePokemonDataIntoCache(data *gohbem.PokemonData) {
+	// Convert to JSON
+	jsonData, err := json.MarshalIndent(data, "", "  ")
+	if err != nil {
+		log.Errorf("Error marshalling Masterfile: %s", err)
+		return
+	}
+	// Write to the file
+	file, err := os.Create("cache/master-latest-basics.json")
+	if err != nil {
+		log.Errorf("Error creating file: %s", err)
+		return
+	}
+	defer func() {
+		if err2 := file.Close(); err2 != nil {
+			log.Errorf("Error closing file: %s", err2)
+		}
+	}()
+
+	_, err = file.Write(jsonData)
+	if err != nil {
+		log.Errorf("Error writing to file: %s", err)
+		return
+	}
+}
+
 func ClearPokestopCache() {
 	pokestopCache.DeleteAll()
 }