main.go

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
)

const (
	typeCodeClozer = "code"
	typeRuneClozer = "rune"
	typeWordClozer = "word"
)

var (
	path   string
	symbol string

	defaultPath = "./content"
	fs          flag.FlagSet
)

func init() {
	fs.StringVar(&path, "path", "", "path of file containing content")
	fs.StringVar(&symbol, "symbol", "x", "symbol to cloze")
}

func main() {
	// clozer type
	t := os.Args[1]
	fs.Parse(os.Args[2:])
	if path == "" {
		path = defaultPath
		log.Printf("path not be specified, will use default path: %s\n", path)
	}
	f, err := os.OpenFile(path, os.O_RDONLY, 0766)
	if err != nil {
		log.Fatalf("failed to open file: %s, error: %+v\n", path, err)
	}
	c := getClozer(t)
	s, err := c.Cloze(f)
	if err != nil {
		panic(err)
	}
	fmt.Println(s)
}

func multiByteRune(r rune) bool {
	letter := r >= 'A' && r <= 'Z' || r >= 'a' && r <= 'z'
	return !letter
}

func isLetter(r byte) bool {
	return r >= 'A' && r <= 'Z' || r >= 'a' && r <= 'z'
}