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level.go
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level.go
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package main
import (
"errors"
"fmt"
_ "image/png"
"log"
"regexp"
"slices"
"strings"
"github.com/darellanodev/jetpack-game/lib"
)
var (
levels []string
totalGameLevels int
)
type Level struct {
number int
title string
platformPlaces [5]string
floorPlaces string
}
func NewLevel() *Level {
return &Level{
number: startingLevel,
title: "",
}
}
func (f * Level) Reinit() {
f.number = startingLevel
}
func (f *Level) Next() {
f.number++
f.Load()
}
func (f *Level) Load() {
level := levels[f.number-1]
levelLines := strings.Split(level, CRLF)
f.title = levelLines[0]
f.platformPlaces[0] = levelLines[1]
f.platformPlaces[1] = levelLines[2]
f.platformPlaces[2] = levelLines[3]
f.platformPlaces[3] = levelLines[4]
f.platformPlaces[4] = levelLines[5]
f.floorPlaces = levelLines[6]
}
func isLineValid(line string) bool {
emptyLevelCharacterCount := strings.Count(line, emptyLevelCharacter)
platformLevelCharacterCount := strings.Count(line, platformLevelCharacter)
normalFloorLevelCharacterCount := strings.Count(line, normalFloorLevelCharacter)
lavaFloorLevelCharacterCount := strings.Count(line, lavaFloorLevelCharacter)
lavaWithDropsFloorLevelCharacterCount := strings.Count(line, lavaFloorWithDropsLevelCharacter)
totalValidCharacters := emptyLevelCharacterCount + normalFloorLevelCharacterCount + lavaFloorLevelCharacterCount + platformLevelCharacterCount + lavaWithDropsFloorLevelCharacterCount
return totalValidCharacters == 6
}
func isLevelValid(level string) bool {
lines := strings.Split(level, CRLF)
if len(lines) == 0 {
return false
}
if len(lines) != totalRowsTxt {
return false
}
result := true
for i := firstLevelRowTxt; i <= totalLevelRowsTxt; i++ {
result = result && isLineValid(lines[i])
}
return result
}
func getLevelEntries() []string {
entries, err := assets.ReadDir("assets/levels")
var result []string
if err != nil {
log.Fatal(err)
}
for _, entry := range entries{
result = append(result, entry.Name())
}
return result
}
func getLevelFiles(entries []string) []string {
var levelFiles []string
levelRegex := regexp.MustCompile(`level\d\.txt`)
for _, entry := range entries{
levelFile := levelRegex.FindString(entry)
levelFiles = append(levelFiles, levelFile)
}
return levelFiles
}
func verifyLevelNames(levelFiles []string) error {
totalLevels := len(levelFiles)
var searchFile string
var isCorrect bool
for i := 1; i <= totalLevels; i++ {
searchFile = fmt.Sprintf("level%d.txt", i)
isCorrect = slices.Contains(levelFiles, searchFile)
if !isCorrect {
return errors.New("The file " + searchFile + " does not exists")
}
}
return nil
}
func LoadLevels() error {
levelEntries := getLevelEntries()
levelFiles := getLevelFiles(levelEntries)
totalGameLevels = len(levelFiles)
if totalGameLevels == 0 {
return errors.New("there are no levels")
}
err := verifyLevelNames(levelFiles)
if err != nil {
return err
}
for i := 1; i <= totalGameLevels; i++ {
levelPath := fmt.Sprintf("assets/levels/level%d.txt", i)
levelBytes, err := lib.LoadStaticResource(assets, levelPath)
level := string(levelBytes)
if err != nil {
return err
}
if !isLevelValid(level) {
msg := fmt.Sprintf("level %d (%v) has an invalid format", i, levelPath)
return errors.New(msg)
}
levels = append(levels, level)
}
return nil
}