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package importer
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
"math"
"os"
"strings"
"github.com/urfave/cli/v2"
"git.gabrielgio.me/dict/db"
)
var ImportCommand = &cli.Command{
Name: "import",
Usage: "convert dict.cc dictionary into a queryable sqlite format.",
Flags: []cli.Flag{
&cli.StringFlag{
Name: "output",
Value: "main.dict",
Usage: "Dictionary database location",
},
&cli.StringFlag{
Name: "input",
Value: "dict.txt",
Usage: "Dict.cc txt dictionary file",
},
},
Action: func(cCtx *cli.Context) error {
input := cCtx.String("input")
output := cCtx.String("output")
return Import(context.Background(), input, output)
},
}
func Import(ctx context.Context, txtInput, sqliteOutput string) error {
db, err := db.Open(":memory:")
if err != nil {
return err
}
err = db.Migrate(ctx)
if err != nil {
return err
}
file, err := os.Open(txtInput)
if err != nil {
return err
}
defer file.Close()
count := 0
total, err := lineCounter(file)
if err != nil {
return err
}
_, err = file.Seek(0, 0)
if err != nil {
return err
}
scanner := bufio.NewScanner(file)
for scanner.Scan() {
if strings.HasPrefix(scanner.Text(), "#") || scanner.Text() == "" {
continue
}
var (
p = strings.SplitN(scanner.Text(), "\t", 2)
word = p[0]
line = strings.ReplaceAll(p[1], "\t", " ")
)
if err := db.InsertLine(ctx, word, line); err != nil {
return err
}
count++
if (count % 1234) == 0 {
fmt.Print("\033[G\033[K") // move the cursor left and clear the line
per := math.Ceil((float64(count) / float64(total)) * 100.0)
fmt.Printf("%d/%d (%.0f%%)", count, total, per)
}
}
fmt.Printf("\nConsolidating...")
err = db.Consolidade(ctx)
if err != nil {
return err
}
err = db.Backup(ctx, sqliteOutput)
if err != nil {
return err
}
return nil
}
func lineCounter(r io.Reader) (int, error) {
var count int
const lineBreak = '\n'
buf := make([]byte, bufio.MaxScanTokenSize)
for {
bufferSize, err := r.Read(buf)
if err != nil && err != io.EOF {
return 0, err
}
var buffPosition int
for {
i := bytes.IndexByte(buf[buffPosition:], lineBreak)
if i == -1 || bufferSize == buffPosition {
break
}
buffPosition += i + 1
count++
}
if err == io.EOF {
break
}
}
return count, nil
}
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