Added support for level packs.

Added level selection.

.gitignore

@@ -8,3 +8,4 @@ rice-box.go
 
 # Application
 cmd/krampus19/res/_sandbox/
+cmd/krampus19/TODO

cmd/krampus19/changesettings.go

@@ -305,9 +305,9 @@ func (s *changeSettings) Enter(ctx *Context) error {
 				log.Printf("Stored new settings.")
 			}
 
-			s.ctx.Navigation.showMainMenu()
+			s.ctx.Navigation.ShowMainMenu()
 		}),
-		newWideButton("Cancel", func() { s.ctx.Navigation.showMainMenu() }),
+		newWideButton("Cancel", func() { s.ctx.Navigation.ShowMainMenu() }),
 	)
 	s.AddChild(alui.Center(buttons))
 	return nil

cmd/krampus19/context.go

@@ -24,8 +24,8 @@ type Context struct {
 	DisplaySize  geom.Point
 	Resources    vfs.CopyDir
 	Textures     map[string]texture
-	Levels       map[string]level
 	Sprites      map[string]sprite
+	Levels       map[string]levelPack
 	SpriteDrawer SpriteDrawer
 	Settings     settings
 	Palette      *alui.Palette

cmd/krampus19/game.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"image/png"
+	"io"
 	"log"
 
 	"opslag.de/schobers/allg5"
@@ -89,20 +90,23 @@ func (g *game) loadTextures(pathToName map[string]string) error {
 	return nil
 }
 
-func (g *game) loadLevels(names ...string) error {
+func (g *game) loadLevelPack(ids ...string) error {
-	g.ctx.Levels = map[string]level{}
+	g.ctx.Levels = map[string]levelPack{}
-	for _, name := range names {
+	for _, id := range ids {
-		fileName := fmt.Sprintf("levels/level%s.txt", name)
+		fileName := fmt.Sprintf("levels/pack%s.txt", id)
 		f, err := g.ctx.Resources.Open(fileName)
 		if err != nil {
 			return err
 		}
 		defer f.Close()
-		level, err := loadLevelAsset(f)
+		pack, err := parseLevelPackAsset(f, func(levelID string) (io.ReadCloser, error) {
+			fileName := fmt.Sprintf("levels/pack%s_level%s.txt", id, levelID)
+			return g.ctx.Resources.Open(fileName)
+		})
 		if err != nil {
 			return err
 		}
-		g.ctx.Levels[name] = level
+		g.ctx.Levels[id] = pack
 	}
 	return nil
 }
@@ -151,7 +155,7 @@ func (g *game) loadAssets() error {
 	log.Printf("Loaded %d textures.\n", len(g.ctx.Textures))
 
 	log.Println("Loading levels...")
-	err = g.loadLevels("1", "2")
+	err = g.loadLevelPack("1")
 	if err != nil {
 		return err
 	}
@@ -192,7 +196,7 @@ func (g *game) Init(disp *allg5.Display, settings settings, res vfs.CopyDir, con
 	}
 	log.Print("Loaded assets.")
 
-	g.ctx.Navigation.showMainMenu()
+	g.ctx.Navigation.ShowMainMenu()
 
 	return nil
 }

cmd/krampus19/level.go

@@ -65,7 +65,7 @@ func (l level) posToIdx(p geom.Point) int {
 	return p.Y*l.width + p.X
 }
 
-func loadLevelAsset(r io.Reader) (level, error) {
+func parseLevelAsset(r io.Reader) (level, error) {
 	var l level
 	ctx := levelContext{&l}
 	err := parseLines(r, ctx.parse)

cmd/krampus19/levelpack.go

@@ -0,0 +1,106 @@
+package main
+
+import (
+	"errors"
+	"io"
+	"strings"
+)
+
+type levelPack struct {
+	name   string
+	order  []string
+	levels map[string]level
+}
+
+type parseLevelPackContext struct {
+	name   string
+	levels []string
+}
+
+func parseLevelPackAsset(r io.Reader, openLevelFn func(id string) (io.ReadCloser, error)) (levelPack, error) {
+	ctx := &parseLevelPackContext{}
+	err := parseLines(r, ctx.Parse)
+	if err != nil {
+		return levelPack{}, err
+	}
+
+	pack := levelPack{name: ctx.name, levels: map[string]level{}}
+	for _, id := range ctx.levels {
+		rc, err := openLevelFn(id)
+		if err != nil {
+			return levelPack{}, err
+		}
+		defer rc.Close()
+		level, err := parseLevelAsset(rc)
+		if err != nil {
+			return levelPack{}, err
+		}
+		pack.order = append(pack.order, id)
+		pack.levels[id] = level
+	}
+
+	return pack, nil
+}
+
+func (c *parseLevelPackContext) Parse(p *lineParser) parseLineFn {
+	if p.skipSpaceEOF() {
+		return p.emitErr(errors.New("empty level pack"))
+	}
+	return c.parse
+}
+
+func (c *parseLevelPackContext) parse(p *lineParser) parseLineFn {
+	const levelsTag = "levels:"
+	const nameTag = "name:"
+
+	if p.skipSpaceEOF() {
+		return nil
+	}
+
+	line := p.next()
+	switch {
+	case strings.HasPrefix(line, nameTag):
+		c.name = strings.TrimSpace(line[len(nameTag):])
+		return c.parse
+	case strings.HasPrefix(line, levelsTag):
+		return skipSpaceBeforeContent(c.parseLevels)
+	}
+	return p.emitErr(errors.New("tag not allowed"))
+}
+
+func (c *parseLevelPackContext) parseLevels(p *lineParser) parseLineFn {
+	const levelTag = "level:"
+	const levelsEndTag = ":levels"
+
+	line := p.next()
+	switch line {
+	case levelTag:
+		return skipSpaceBeforeContent(c.parseLevel)
+	case levelsEndTag:
+		return c.parse
+	}
+	return p.emitErr(errors.New("tag not allowed"))
+}
+
+func (c *parseLevelPackContext) parseLevel(p *lineParser) parseLineFn {
+	const idTag = "id:"
+
+	line := p.next()
+	switch {
+	case strings.HasPrefix(line, idTag):
+		c.levels = append(c.levels, strings.TrimSpace(line[len(idTag):]))
+		return skipSpaceBeforeContent(c.parseLevelEnd)
+	}
+	return p.emitErr(errors.New("must have an id tag"))
+}
+
+func (c *parseLevelPackContext) parseLevelEnd(p *lineParser) parseLineFn {
+	const levelEndTag = ":level"
+
+	line := p.next()
+	switch {
+	case strings.HasPrefix(line, levelEndTag):
+		return skipSpaceBeforeContent(c.parseLevels)
+	}
+	return p.emitErr(errors.New("tag not allowed"))
+}

cmd/krampus19/levelselect.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+
+	"opslag.de/schobers/krampus19/alui"
+)
+
+type levelSelect struct {
+	alui.Menu
+
+	ctx *Context
+
+	packID string
+	pack   levelPack
+}
+
+func (s *levelSelect) Enter(ctx *Context) error {
+	s.ctx = ctx
+	s.pack = s.ctx.Levels[s.packID]
+	s.Init()
+	name := func(id string) string { return fmt.Sprintf("Level %s", id) }
+	for _, id := range s.pack.order {
+		// level := s.pack[id]
+		levelID := id
+		s.Add(name(levelID), func() {
+			s.ctx.Navigation.PlayLevel(s.packID, levelID)
+		})
+	}
+	s.Add("Back to main menu", func() { s.ctx.Navigation.ShowMainMenu() })
+	return nil
+}
+
+func (s *levelSelect) Leave() {}

cmd/krampus19/lineparser.go

@@ -35,6 +35,15 @@ func (p *lineParser) skipSpaceEOF() bool {
 	return p.eof()
 }
 
+func skipSpaceBeforeContent(next parseLineFn) parseLineFn {
+	return func(p *lineParser) parseLineFn {
+		if p.skipSpaceEOF() {
+			return p.emitErr(errUnexpectedEnd)
+		}
+		return next
+	}
+}
+
 type parseLineFn func(p *lineParser) parseLineFn
 
 func parseLines(r io.Reader, fn parseLineFn) error {

cmd/krampus19/mainmenu.go

@@ -13,9 +13,9 @@ type mainMenu struct {
 func (m *mainMenu) Enter(ctx *Context) error {
 	m.ctx = ctx
 	m.Init()
-	m.Add("Play", func() { m.ctx.Navigation.playLevel("2") })
+	m.Add("Play", func() { m.ctx.Navigation.SelectLevel("1") })
-	m.Add("Settings", func() { m.ctx.Navigation.changeSettings() })
+	m.Add("Settings", func() { m.ctx.Navigation.ChangeSettings() })
-	m.Add("Quit", func() { m.ctx.Navigation.quit() })
+	m.Add("Quit", func() { m.ctx.Navigation.Quit() })
 	return nil
 }
 

cmd/krampus19/navigation.go

@@ -16,22 +16,26 @@ type scene interface {
 	Leave()
 }
 
-func (n *navigation) changeSettings() {
+func (n *navigation) ChangeSettings() {
 	n.switchTo(&changeSettings{})
 }
 
-func (n *navigation) playLevel(l string) {
+func (n *navigation) PlayLevel(packID, levelID string) {
-	n.switchTo(&playLevel{name: l})
+	n.switchTo(&playLevel{packID: packID, levelID: levelID})
 }
 
-func (n *navigation) quit() {
+func (n *navigation) SelectLevel(packID string) {
-	n.switchTo(nil)
+	n.switchTo(&levelSelect{packID: packID})
 }
 
-func (n *navigation) showMainMenu() {
+func (n *navigation) ShowMainMenu() {
 	n.switchTo(&mainMenu{})
 }
 
+func (n *navigation) Quit() {
+	n.switchTo(nil)
+}
+
 func (n *navigation) switchTo(s scene) {
 	if n.curr != nil {
 		n.curr.Leave()

cmd/krampus19/playlevel.go

@@ -19,7 +19,8 @@ type playLevel struct {
 	menu     *alui.Menu
 	showMenu bool
 
-	name   string
+	packID  string
+	levelID string
 	offset  geom.PointF32
 	scale   float32
 
@@ -80,13 +81,14 @@ func (l *playLevel) Enter(ctx *Context) error {
 
 	l.menu = alui.NewMenu()
 	l.menu.Add("Resume", func() { l.showMenu = false })
-	l.menu.Add("Restart", func() { l.ctx.Navigation.playLevel(l.name) })
+	l.menu.Add("Restart", func() { l.ctx.Navigation.PlayLevel(l.packID, l.levelID) })
-	l.menu.Add("Quit to main menu", func() { l.ctx.Navigation.showMainMenu() })
+	l.menu.Add("Select other level", func() { l.ctx.Navigation.SelectLevel(l.packID) })
-	l.menu.Add("Quit to desktop", func() { l.ctx.Navigation.quit() })
+	l.menu.Add("Quit to main menu", func() { l.ctx.Navigation.ShowMainMenu() })
+	l.menu.Add("Quit to desktop", func() { l.ctx.Navigation.Quit() })
 	l.menu.OnEscape = func() { l.showMenu = false }
 
 	l.init = true
-	l.state.Init(l.ctx, l.name)
+	l.state.Init(l.ctx, l.packID, l.levelID)
 	return nil
 }
 

cmd/krampus19/playlevelstate.go

@@ -29,6 +29,7 @@ func findEntityIdx(entities []*entity, pos geom.Point) int {
 type playLevelState struct {
 	ctx *Context
 
+	pack     levelPack
 	level    level
 	player   *entity
 	villain  *entity
@@ -61,9 +62,10 @@ func (s *playLevelState) IsNextToMagma(pos geom.Point) bool {
 		s.checkTile(pos.Add2D(0, 1), s.isMagma)
 }
 
-func (s *playLevelState) Init(ctx *Context, levelName string) {
+func (s *playLevelState) Init(ctx *Context, pack, level string) {
 	s.ctx = ctx
-	s.level = ctx.Levels[levelName]
+	s.pack = ctx.Levels[pack]
+	s.level = s.pack.levels[level]
 	s.bricks = nil
 	s.sunken = nil
 	for i, e := range s.level.entities {

cmd/krampus19/res/levels/pack1.txt

@@ -0,0 +1,13 @@
+name: Standard
+
+levels:
+
+level:
+id: 1
+:level
+
+level:
+id: 2
+:level
+
+:levels