init: Initial commit

app/utils/env.go

@@ -0,0 +1,22 @@
+package utils
+
+import (
+	"os"
+	"strings"
+)
+
+func GetEnv(key, defaultValue string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return defaultValue
+	}
+	return value
+}
+
+func GetEnvBool(key string, defaultValue bool) bool {
+	value := strings.ToLower(GetEnv(key, ""))
+	if value == "" {
+		return defaultValue
+	}
+	return value == "true" || value == "1"
+}

app/utils/hash.go

@@ -0,0 +1,81 @@
+package utils
+
+import (
+	"crypto/rand"
+	"crypto/subtle"
+	"encoding/base64"
+	"fmt"
+	"strings"
+
+	"golang.org/x/crypto/argon2"
+)
+
+const (
+	argon2Time    = 3
+	argon2Memory  = 64 * 1024
+	argon2Threads = 4
+	argon2KeyLen  = 32
+	saltLength    = 16
+)
+
+func Hash(password string) (string, error) {
+	salt := make([]byte, saltLength)
+	if _, err := rand.Read(salt); err != nil {
+		return "", err
+	}
+
+	hash := argon2.IDKey([]byte(password), salt, argon2Time, argon2Memory, argon2Threads, argon2KeyLen)
+
+	b64Salt := base64.RawStdEncoding.EncodeToString(salt)
+	b64Hash := base64.RawStdEncoding.EncodeToString(hash)
+
+	encodedHash := fmt.Sprintf("$argon2id$v=%d$m=%d,t=%d,p=%d$%s$%s",
+		argon2.Version, argon2Memory, argon2Time, argon2Threads, b64Salt, b64Hash)
+
+	return encodedHash, nil
+}
+
+func Verify(password, encodedHash string) (bool, error) {
+	parts := strings.Split(encodedHash, "$")
+	if len(parts) != 6 {
+		return false, fmt.Errorf("invalid hash format")
+	}
+
+	if parts[1] != "argon2id" {
+		return false, fmt.Errorf("unsupported hash algorithm")
+	}
+
+	var version int
+	_, err := fmt.Sscanf(parts[2], "v=%d", &version)
+	if err != nil {
+		return false, err
+	}
+	if version != argon2.Version {
+		return false, fmt.Errorf("incompatible version")
+	}
+
+	var memory, time uint32
+	var threads uint8
+	_, err = fmt.Sscanf(parts[3], "m=%d,t=%d,p=%d", &memory, &time, &threads)
+	if err != nil {
+		return false, err
+	}
+
+	salt, err := base64.RawStdEncoding.DecodeString(parts[4])
+	if err != nil {
+		return false, err
+	}
+
+	hash, err := base64.RawStdEncoding.DecodeString(parts[5])
+	if err != nil {
+		return false, err
+	}
+
+	otherHash := argon2.IDKey([]byte(password), salt, time, memory, threads, uint32(len(hash)))
+
+	if subtle.ConstantTimeCompare(hash, otherHash) == 1 {
+		return true, nil
+	}
+
+	return false, nil
+}

app/utils/http.go

@@ -0,0 +1,16 @@
+package utils
+
+import (
+	"github.com/go-playground/validator/v10"
+	"github.com/gofiber/fiber/v2"
+)
+
+func ValidateRequest(c *fiber.Ctx, request interface{}) (*HTTPResponse, error) {
+	if err := c.BodyParser(request); err != nil {
+		return NewHTTPResponse(fiber.StatusBadRequest, &fiber.Map{"message": "Invalid request body"}, "", nil, nil), err
+	}
+	if err := validator.New().Struct(request); err != nil {
+		return NewHTTPResponse(fiber.StatusBadRequest, &fiber.Map{"message": "Invalid request body"}, "", nil, nil), err
+	}
+	return NewHTTPResponse(fiber.StatusOK, nil, "", nil, nil), nil
+}

app/utils/res/http.go

@@ -0,0 +1,11 @@
+package res
+
+import "github.com/gofiber/fiber/v2"
+
+type HTTPResponse struct {
+	Code          int        `json:"code"`
+	Body          *fiber.Map `json:"body"`
+	ODataContext  string     `json:"@odata.context"`
+	ODataCount    int        `json:"@odata.count"`
+	ODataNextLink *string    `json:"@odata.nextLink"`
+}

app/utils/response.go

@@ -0,0 +1,77 @@
+package utils
+
+import (
+	"github.com/gofiber/fiber/v2"
+)
+
+type Response interface {
+	JSON() map[string]interface{}
+	Send(c *fiber.Ctx) error
+}
+
+type HTTPResponse struct {
+	Code          int        `json:"code"`
+	Body          *fiber.Map `json:"body"`
+	ODataContext  string     `json:"@odata.context"`
+	ODataCount    *int       `json:"@odata.count"`
+	ODataNextLink *string    `json:"@odata.nextLink"`
+}
+
+type ErrorResponse struct {
+	Code int        `json:"code"`
+	Body *fiber.Map `json:"body"`
+}
+
+func NewHTTPResponse(code int, body *fiber.Map, oDataContext string, oDataCount *int, oDataNextLink *string) *HTTPResponse {
+	return &HTTPResponse{
+		Code:          code,
+		Body:          body,
+		ODataContext:  oDataContext,
+		ODataCount:    oDataCount,
+		ODataNextLink: oDataNextLink,
+	}
+}
+
+func NewErrorResponse(code int, body *fiber.Map) *ErrorResponse {
+	return &ErrorResponse{
+		Code: code,
+		Body: body,
+	}
+}
+
+func (res *HTTPResponse) JSON() map[string]interface{} {
+	result := map[string]interface{}{
+		"code": res.Code,
+	}
+	if res.Body != nil {
+		result["body"] = res.Body
+	}
+	if res.ODataContext != "" {
+		result["@odata.context"] = res.ODataContext
+	}
+	if res.ODataCount != nil {
+		result["@odata.count"] = *res.ODataCount
+	}
+	if res.ODataNextLink != nil {
+		result["@odata.nextLink"] = res.ODataNextLink
+	}
+	return result
+}
+
+func (res *ErrorResponse) JSON() map[string]interface{} {
+	result := map[string]interface{}{
+		"code": res.Code,
+	}
+	if res.Body != nil {
+		result["body"] = res.Body
+	}
+	return result
+}
+
+func (res *ErrorResponse) Send(c *fiber.Ctx) error {
+	return c.Status(res.Code).JSON(res.JSON())
+}
+
+func (res *HTTPResponse) Send(c *fiber.Ctx) error {
+	return c.Status(res.Code).JSON(res.JSON())
+}

app/utils/sql.go

@@ -0,0 +1,25 @@
+package utils
+
+import (
+	"errors"
+	"strings"
+
+	"gorm.io/gorm"
+)
+
+// IsDuplicateKeyError checks if an error is a duplicate key constraint violation
+func IsDuplicateKeyError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	// Check for GORM duplicate key error
+	if errors.Is(err, gorm.ErrDuplicatedKey) {
+		return true
+	}
+
+	// Check for PostgreSQL duplicate key error (SQLSTATE 23505)
+	errMsg := strings.ToLower(err.Error())
+	return strings.Contains(errMsg, "duplicate key value violates unique constraint") ||
+		strings.Contains(errMsg, "sqlstate 23505")
+}

app/utils/token.go

@@ -0,0 +1,18 @@
+package utils
+
+import (
+	"crypto/rand"
+)
+
+func GenerateRandomString(length int) string {
+	charset := "abcdefghijklmnopqrstuvwxyz0123456789"
+	b := make([]byte, length)
+	_, err := rand.Read(b)
+	if err != nil {
+		return ""
+	}
+	for i := range b {
+		b[i] = charset[b[i]%byte(len(charset))]
+	}
+	return string(b)
+}