adding validated services? patching forcad_local.py

OmCTF-2025/services/block_game/backend/game/tiles.go

@@ -0,0 +1,136 @@
+package game
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"omctf.ru/block-game-backend/schema"
+	"omctf.ru/block-game-backend/utils/xy"
+)
+
+type Tile struct {
+	Kind string          `json:"kind"`
+	Pos  xy.Point        `json:"pos"`
+	Data json.RawMessage `json:"data"`
+}
+
+type Tiles struct {
+	size  int
+	Tiles []Tile
+}
+
+func NewTiles(size int, tiles []schema.Tile) Tiles {
+	var result Tiles
+	result.size = size
+	for _, tile := range tiles {
+		result.Tiles = append(result.Tiles, Tile{
+			Kind: tile.Kind,
+			Pos:  tile.Pos,
+			Data: tile.Data,
+		})
+	}
+	return result
+}
+
+func (t *Tiles) Size() int {
+	return t.size
+}
+
+func (t *Tiles) inBounds(p xy.Point) bool {
+	return p.X >= 0 && p.Y >= 0 && p.X < t.size && p.Y < t.size
+}
+
+func (t *Tiles) GetPlayerTile() (*Tile, error) {
+	playerIdx, err := t.GetTheOnlyIdx("player")
+	if err != nil {
+		return nil, err
+	}
+	if playerIdx == -1 {
+		return nil, fmt.Errorf("player not found")
+	}
+	return &t.Tiles[playerIdx], nil
+}
+
+func (t *Tiles) Index(tile *Tile) int {
+	for i := range t.Tiles {
+		if &t.Tiles[i] == tile {
+			return i
+		}
+	}
+	return -1
+}
+
+func (t *Tiles) GetTheOnlyIdx(kind string) (int, error) {
+	result := -1
+	for i, tile := range t.Tiles {
+		if tile.Kind == kind {
+			if result != -1 {
+				return -1, ErrDuplicateType{}
+			}
+			result = i
+		}
+	}
+	return result, nil
+}
+
+func (t *Tiles) GetTheOnly(kind string) (*Tile, error) {
+	i, err := t.GetTheOnlyIdx(kind)
+	if err != nil {
+		return nil, err
+	}
+	if i == -1 {
+		return nil, nil
+	}
+	return &t.Tiles[i], nil
+}
+
+type TilesAt []*Tile
+
+func (t *Tiles) At(p xy.Point) TilesAt {
+	var result TilesAt
+	for i := range t.Tiles {
+		if t.Tiles[i].Pos == p {
+			result = append(result, &t.Tiles[i])
+		}
+	}
+	return result
+}
+
+type ErrDuplicateType struct{}
+
+func (e ErrDuplicateType) Error() string {
+	return "multiple tiles of the requested type"
+}
+
+func (t TilesAt) Has(kind string) bool {
+	for _, tile := range t {
+		if tile.Kind == kind {
+			return true
+		}
+	}
+	return false
+}
+
+func (t TilesAt) GetTheOnlyIdx(kind string) (int, error) {
+	result := -1
+	for i, tile := range t {
+		if tile.Kind == kind {
+			if result != -1 {
+				return -1, ErrDuplicateType{}
+			}
+			result = i
+		}
+	}
+	return result, nil
+}
+
+func (t TilesAt) GetTheOnly(kind string) (*Tile, error) {
+	i, err := t.GetTheOnlyIdx(kind)
+	if err != nil {
+		return nil, err
+	}
+	if i == -1 {
+		return nil, nil
+	}
+	return t[i], nil
+}