From fc79db677d41033639f858635f7fc8bb96b161a6 Mon Sep 17 00:00:00 2001
From: Neale Pickett <neale@woozle.org>
Date: Sun, 18 Aug 2019 21:59:06 -0600
Subject: [PATCH] Generating whole categories now

---
 cmd/transpile/category.go | 121 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 116 insertions(+), 5 deletions(-)

diff --git a/cmd/transpile/category.go b/cmd/transpile/category.go
index 2310862..450f5bc 100644
--- a/cmd/transpile/category.go
+++ b/cmd/transpile/category.go
@@ -4,15 +4,126 @@ import (
 	"os"
 	"flag"
 	"fmt"
+	"log"
+	"path/filepath"
+	"hash/fnv"
+	"encoding/binary"
+	"encoding/json"
+	"encoding/hex"
+	"strconv"
+	"math/rand"
 )
 
+
+type PuzzleEntry struct {
+	Id string
+	Points int
+	Puzzle Puzzle
+}
+
+
+func HashHex(input ...string) (string) {
+	hasher := fnv.New64()
+	for _, s := range input {
+		fmt.Fprintln(hasher, s)
+	}
+	return hex.EncodeToString(hasher.Sum(nil))
+}
+
+
+func PrngOfStrings(input ...string) (*rand.Rand) {
+	hasher := fnv.New64()
+	for _, s := range input {
+		fmt.Fprint(hasher, s, "\n")
+	}
+	seed := binary.BigEndian.Uint64(hasher.Sum(nil))
+	source := rand.NewSource(int64(seed))
+	return rand.New(source)
+}
+
+
+func ParsePuzzle(puzzlePath string, seed string) (*Puzzle, error) {
+	puzzleFd, err := os.Open(puzzlePath)
+	if err != nil {
+		return nil, err
+	}
+	defer puzzleFd.Close()
+	
+	puzzle, err := ParseMoth(puzzleFd)
+	if err != nil {
+		return nil, err
+	}
+
+	return puzzle, nil
+}
+
+
+func ParseCategory(categoryPath string, seed string) ([]PuzzleEntry, error) {
+	categoryFd, err := os.Open(categoryPath)
+	if err != nil {
+		return nil, err
+	}
+	defer categoryFd.Close()
+	
+	puzzleDirs, err := categoryFd.Readdirnames(0)
+	if err != nil {
+		return nil, err
+	}
+	
+	puzzleEntries := make([]PuzzleEntry, 0, len(puzzleDirs))
+	for _, puzzleDir := range puzzleDirs {
+		puzzlePath := filepath.Join(categoryPath, puzzleDir, "puzzle.moth")
+		puzzleSeed := fmt.Sprintf("%s/%s", seed, puzzleDir)
+		
+		points, err := strconv.Atoi(puzzleDir)
+		if err != nil {
+			log.Printf("Skipping %s: %v", puzzlePath, err)
+			continue
+		}
+	
+		puzzle, err := ParsePuzzle(puzzlePath, puzzleSeed)
+		if err != nil {
+			log.Printf("Skipping %s: %v", puzzlePath, err)
+			continue
+		}
+		
+		prng := PrngOfStrings(puzzleSeed)
+		idBytes := make([]byte, 16)
+		prng.Read(idBytes)
+		id := hex.EncodeToString(idBytes)
+		puzzleEntry := PuzzleEntry{
+			Id: id,
+			Puzzle: *puzzle,
+			Points: points,
+		}
+		puzzleEntries = append(puzzleEntries, puzzleEntry)
+	}
+	
+	return puzzleEntries, nil
+}
+
+
 func main() {
+	// XXX: We need a way to pass in "only run this one point value puzzle"
+	
 	flag.Parse()
+	baseSeedString := os.Getenv("SEED")
 	
 	for _, dirname := range flag.Args() {
-		f, _ := os.Open(dirname)
-		defer f.Close()
-		names, _ := f.Readdirnames(0)
-		fmt.Print(names)
+		categoryName := filepath.Base(dirname)
+		categorySeed := fmt.Sprintf("%s/%s", baseSeedString, categoryName)
+		puzzles, err := ParseCategory(dirname, categorySeed)
+		if err != nil {
+			log.Print(err)
+			continue
+		}
+		
+		jpuzzles, err := json.MarshalIndent(puzzles, "", "  ")
+		if err != nil {
+			log.Print(err)
+			continue
+		}
+		
+		fmt.Println(string(jpuzzles))
 	}
-}
\ No newline at end of file
+}