support ipuz files

Makefile

@@ -1,6 +1,6 @@
 all: bin/crossword bin/crossword-ssh
 
-bin/crossword: cmd/main.go puz/puz.go game/game.go
+bin/crossword: cmd/main.go puz/*.go game/game.go
 	go build -o $@ ./cmd
-bin/crossword-ssh: ssh/main.go puz/puz.go game/game.go
+bin/crossword-ssh: ssh/main.go puz/*.go game/game.go
 	go build -o $@ ./ssh

README.md

@@ -1,4 +1,4 @@
-Very silly terminal-based crossword solver. It can play .puz files from a variety of sources, including [Crosshare](https://crosshare.org).
+Very silly terminal-based crossword solver. It can play .puz / .ipuz files from a variety of sources, including [Crosshare](https://crosshare.org).
 
 - Requirements: [Go](https://go.dev)
 - Build: `make`
@@ -16,5 +16,5 @@ todo
 - .puz checksums
 - fix shift+enter / shift+tab in other terminals
 - clear grid
-- rebus (at least add message that rebus is not supported)
+- rebus
-- .ipuz files
+- detect rebus for .puz files

cmd/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"bufio"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"log"
@@ -20,10 +21,11 @@ func main() {
 	}()
 
 	debugMode := flag.Bool("debug", false, "")
+	dumpMode := flag.Bool("dump", false, "")
 	flag.Parse()
 
 	filename := flag.Arg(0)
-	file, err := os.ReadFile(filename)
+	file, err := os.Open(filename)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -33,11 +35,17 @@ func main() {
 		log.Fatal(err)
 	}
 
-	puzzle, err := puz.ParsePuz(file)
+	puzzle, err := puz.LoadPuzzle(file)
 	if err != nil {
 		log.Fatal(err)
 	}
 
+	if dumpMode != nil && *dumpMode {
+		json.NewEncoder(os.Stdout).Encode(puzzle)
+		fmt.Print("\r\n")
+		return
+	}
+
 	fmt.Print("\x1b[?25l")
 
 	defer func() {

game/game.go

@@ -29,6 +29,7 @@ type State struct {
 	DebugMode         bool
 	SolveState        SolveState
 	CheckState        []rune
+	RebusConfirmation bool
 }
 
 func NewState(puzzle *puz.Puzzle) *State {
@@ -38,6 +39,7 @@ func NewState(puzzle *puz.Puzzle) *State {
 		SelectedClue:      puzzle.Clues[0],
 		SelectedCell:      puzzle.Clues[0].Cells[0],
 		CheckState:        make([]rune, len(puzzle.State)),
+		RebusConfirmation: puzzle.HasRebus,
 	}
 }
 
@@ -242,6 +244,11 @@ func (state *State) CheckWord(clue *puz.Clue) {
 }
 
 func (state *State) RenderUI(w io.Writer) int {
+	if state.RebusConfirmation {
+		fmt.Fprint(w, "This puzzle contains a rebus. This tool does not support rebuses.\r\nPress 'y' to continue anyway, or press any other key to exit.\r\n")
+		return 2
+	}
+
 	uiHeight := 0
 
 	fmt.Fprintf(w, "\r\nTITLE: %s\r\n", state.Puzzle.Title)
@@ -424,6 +431,15 @@ func (state *State) HandleInput(buffer []byte) (exited bool) {
 		return false
 	}
 
+	if state.RebusConfirmation {
+		if buffer[0] == 'y' {
+			state.RebusConfirmation = false
+			return false
+		} else {
+			return true
+		}
+	}
+
 	state.LastKeySequence = fmt.Sprintf("%v", buffer)
 
 	if buffer[0] == 3 {

puz/ipuz.go

@@ -0,0 +1,154 @@
+package puz
+
+import (
+	"encoding/json"
+	"errors"
+	"strconv"
+	"strings"
+)
+
+type iPuzDimensions struct {
+	Width  int `json:"width"`
+	Height int `json:"height"`
+}
+type iPuzClue struct {
+	Number int    `json:"number"`
+	Clue   string `json:"clue"`
+}
+type iPuzFile struct {
+	Title      string                `json:"title"`
+	Author     string                `json:"author"`
+	Copyright  string                `json:"copyright"`
+	Puzzle     [][]any               `json:"puzzle"`
+	Solution   [][]string            `json:"solution"`
+	Dimensions iPuzDimensions        `json:"dimensions"`
+	Clues      map[string][]iPuzClue `json:"clues"`
+}
+
+func ParseIPuz(file []byte) (*Puzzle, error) {
+	var parsed iPuzFile
+	err := json.Unmarshal(file, &parsed)
+	if err != nil {
+		return nil, err
+	}
+
+	puzzle := new(Puzzle)
+
+	puzzle.Title = parsed.Title
+	puzzle.Author = parsed.Author
+	puzzle.Copyright = parsed.Copyright
+
+	puzzle.Width = parsed.Dimensions.Width
+	puzzle.Height = parsed.Dimensions.Height
+
+	puzzle.ClueCount = len(parsed.Clues["Across"]) + len(parsed.Clues["Down"])
+
+	clueToCellMap := make(map[int][2]int)
+
+	state := strings.Builder{}
+	for y, row := range parsed.Puzzle {
+		for x, cell := range row {
+			switch c := cell.(type) {
+			case string:
+				if c == "#" {
+					state.WriteRune('.')
+				} else {
+					if i, err := strconv.Atoi(c); err == nil {
+						clueToCellMap[i] = [2]int{x, y}
+					}
+					state.WriteRune('-')
+				}
+			case float64:
+				clueToCellMap[int(c)] = [2]int{x, y}
+				state.WriteRune('-')
+			default:
+				state.WriteRune('-')
+			}
+		}
+	}
+	puzzle.State = state.String()
+
+	solution := strings.Builder{}
+	for _, row := range parsed.Solution {
+		for _, cell := range row {
+			if cell == "#" {
+				solution.WriteRune('.')
+			} else if len(cell) > 1 {
+				solution.WriteByte(cell[0])
+				puzzle.HasRebus = true
+			} else if len(cell) == 1 {
+				solution.WriteString(cell)
+			} else {
+				return nil, errors.New("invalid ipuz file")
+			}
+		}
+	}
+	puzzle.Solution = solution.String()
+
+	puzzle.Clues = make([]*Clue, 0, puzzle.ClueCount)
+	puzzle.Cells = make([][2]*Clue, puzzle.Width*puzzle.Height)
+
+	for _, clue := range parsed.Clues["Across"] {
+		cellCoords := clueToCellMap[clue.Number]
+
+		clueCells := make([]int, 0)
+		clueSolution := strings.Builder{}
+
+		clueStruct := &Clue{
+			Clue:      clue.Clue,
+			Direction: DirectionAcross,
+			Number:    clue.Number,
+		}
+
+		for i := cellCoords[0]; i < puzzle.Width; i++ {
+			cell := parsed.Solution[cellCoords[1]][i]
+			if cell == "#" {
+				break
+			}
+
+			cellIdx := cellCoords[1]*puzzle.Width + i
+
+			clueCells = append(clueCells, cellIdx)
+			puzzle.Cells[cellIdx][0] = clueStruct
+			clueSolution.WriteByte(cell[0])
+		}
+
+		clueStruct.Solution = clueSolution.String()
+		clueStruct.Cells = clueCells
+
+		puzzle.Clues = append(puzzle.Clues, clueStruct)
+	}
+
+	for _, clue := range parsed.Clues["Down"] {
+		cellCoords := clueToCellMap[clue.Number]
+
+		clueCells := make([]int, 0)
+		clueSolution := strings.Builder{}
+
+		clueStruct := &Clue{
+			Clue:      clue.Clue,
+			Direction: DirectionDown,
+			Number:    clue.Number,
+		}
+
+		for i := cellCoords[1]; i < puzzle.Height; i++ {
+			cell := parsed.Solution[i][cellCoords[0]]
+			if cell == "#" {
+				break
+			}
+
+			cellIdx := i*puzzle.Width + cellCoords[0]
+
+			clueCells = append(clueCells, cellIdx)
+			puzzle.Cells[cellIdx][1] = clueStruct
+			clueSolution.WriteByte(cell[0])
+		}
+
+		clueStruct.Solution = clueSolution.String()
+		clueStruct.Cells = clueCells
+
+		puzzle.Clues = append(puzzle.Clues, clueStruct)
+	}
+
+	return puzzle, nil
+}

puz/puz.go

@@ -11,38 +11,6 @@ import (
 	"golang.org/x/text/encoding/charmap"
 )
 
-type Direction int
-
-const (
-	DirectionAcross Direction = iota
-	DirectionDown
-)
-
-type Clue struct {
-	Clue      string
-	Solution  string
-	Cells     []int
-	Direction Direction
-	Number    int
-}
-
-type Puzzle struct {
-	ClueCount int
-	Width     int
-	Height    int
-
-	Title     string
-	Author    string
-	Copyright string
-
-	Solution string
-	State    string
-
-	Clues []*Clue
-
-	Cells [][2]*Clue
-}
-
 func startOfDownClue(puzzle string, width, height, index int) bool {
 	if puzzle[index] == '.' {
 		return false

puz/shared.go

@@ -0,0 +1,65 @@
+package puz
+
+import (
+	"bufio"
+	"errors"
+	"io"
+)
+
+type Direction int
+
+const (
+	DirectionAcross Direction = iota
+	DirectionDown
+)
+
+type Clue struct {
+	Clue      string
+	Solution  string
+	Cells     []int
+	Direction Direction
+	Number    int
+}
+
+type Puzzle struct {
+	ClueCount int
+	Width     int
+	Height    int
+
+	Title     string
+	Author    string
+	Copyright string
+
+	Solution string
+	State    string
+
+	Clues []*Clue
+
+	Cells [][2]*Clue
+
+	HasRebus bool
+}
+
+func LoadPuzzle(r io.Reader) (*Puzzle, error) {
+	bufReader := bufio.NewReader(r)
+	header, err := bufReader.Peek(16)
+	if err != nil {
+		return nil, err
+	}
+
+	if string(header[2:14]) == "ACROSS&DOWN\x00" {
+		file, err := io.ReadAll(bufReader)
+		if err != nil {
+			return nil, err
+		}
+		return ParsePuz(file)
+	} else if header[0] == '{' {
+		file, err := io.ReadAll(bufReader)
+		if err != nil {
+			return nil, err
+		}
+		return ParseIPuz(file)
+	} else {
+		return nil, errors.New("could not detect file type")
+	}
+}