Restructured project

- backend moved to backend directory
- added and initialized frontend with vue
- moved infrastructure files to infra directory

backend/src/utils/date.go

@@ -0,0 +1,34 @@
+package utils
+
+import (
+	"errors"
+	"strings"
+	"time"
+)
+
+const issuedAtLayout = "02/01/2006, 15:04:05"
+
+var knownDateFormats = []string{
+	"02.01.2006", // 21.01.2026
+	"02.01.06",   // 21.01.2026
+	"02-01-2006", // 21-01-2026
+	"02/01/2006", // 21/01/2026
+	//"2006/01/02", // 2026/01/21
+	//"2006-01-02", // 2026-01-21
+	//"2006.01.02", // 2026.01.21
+}
+
+func NormalizeDateToISO(input string) (string, error) {
+	input = strings.TrimSpace(input)
+	for _, layout := range knownDateFormats {
+		if t, err := time.Parse(layout, input); err == nil {
+			return t.Format("2006-01-02"), nil
+		}
+	}
+
+	return "", errors.New("unsupported date format")
+}
+
+func ParseIssuedAt(value string) (time.Time, error) {
+	return time.Parse(issuedAtLayout, value)
+}

backend/src/utils/jwt.go

@@ -0,0 +1,25 @@
+package utils
+
+import (
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+type JWTManager struct {
+	secret string
+}
+
+func NewJWTManager(secret string) *JWTManager {
+	return &JWTManager{secret: secret}
+}
+
+func (j *JWTManager) Generate(userID int64) (string, error) {
+	claims := jwt.MapClaims{
+		"user_id": userID,
+		"exp":     time.Now().Add(time.Hour * 24 * 7).Unix(),
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(j.secret))
+}

backend/src/utils/numbers.go

@@ -0,0 +1,11 @@
+package utils
+
+import (
+	"strconv"
+	"strings"
+)
+
+func ParseFloat(value string) (float64, error) {
+	value = strings.ReplaceAll(value, ",", ".")
+	return strconv.ParseFloat(value, 64)
+}

backend/src/utils/parser.go

@@ -0,0 +1,33 @@
+package utils
+
+import "regexp"
+
+type ReceiptMeta struct {
+	Date      string
+	ReceiptID string
+}
+
+func ExtractReceiptMeta(text string) ReceiptMeta {
+	result := ReceiptMeta{}
+
+	// --- ДАТА ---
+	datePatterns := []string{
+		`(\d{2}[./-]\d{2}[./-]\d{4})`, // 25.01.2026
+		`(\d{2}[./-]\d{2}[./-]\d{2})`, // 25.01.26
+		`(\d{4}[./-]\d{2}[./-]\d{2})`, // 2026-01-25
+	}
+
+	for _, pattern := range datePatterns {
+		re := regexp.MustCompile(pattern)
+		if match := re.FindString(text); match != "" {
+			result.Date = match
+			break
+		}
+	}
+
+	// --- НОМЕР ЧЕКА (24 символа) ---
+	receiptRe := regexp.MustCompile(`\b[A-Za-z0-9]{24}\b`)
+	result.ReceiptID = receiptRe.FindString(text)
+
+	return result
+}

backend/src/utils/qr_parser.go

@@ -0,0 +1,30 @@
+package utils
+
+import (
+	"bytes"
+	"image"
+	_ "image/jpeg"
+	_ "image/png"
+
+	"github.com/liyue201/goqr"
+)
+
+func DecodeQR(imageBytes []byte) ([]string, error) {
+	img, _, err := image.Decode(bytes.NewReader(imageBytes))
+	if err != nil {
+		return nil, err
+	}
+
+	codes, err := goqr.Recognize(img)
+	if err != nil {
+		return nil, err
+	}
+	println(codes)
+
+	var result []string
+	for _, code := range codes {
+		result = append(result, string(code.Payload))
+	}
+
+	return result, nil
+}