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Add comprehensive i18n localization support

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- Add go-i18n package for internationalization
- Create i18n middleware to extract Accept-Language header
- Add translation files for en, es, fr, de, pt languages
- Localize all handler error messages and responses
- Add language context to all API handlers

Supported languages: English, Spanish, French, German, Portuguese

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Trey t
2025-12-02 02:01:47 -06:00
parent c72741fd5f
commit c17e85c14e
22 changed files with 1771 additions and 193 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
internal/handlers/contractor_handler.go
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@@ -8,6 +8,7 @@ import (
"github.com/gin-gonic/gin"
"github.com/treytartt/casera-api/internal/dto/requests"
"github.com/treytartt/casera-api/internal/i18n"
"github.com/treytartt/casera-api/internal/middleware"
"github.com/treytartt/casera-api/internal/models"
"github.com/treytartt/casera-api/internal/services"
@@ -39,7 +40,7 @@ func (h *ContractorHandler) GetContractor(c *gin.Context) {
user := c.MustGet(middleware.AuthUserKey).(*models.User)
contractorID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid contractor ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_contractor_id")})
return
}
@@ -47,9 +48,9 @@ func (h *ContractorHandler) GetContractor(c *gin.Context) {
if err != nil {
switch {
case errors.Is(err, services.ErrContractorNotFound):
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_not_found")})
case errors.Is(err, services.ErrContractorAccessDenied):
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_access_denied")})
default:
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
}
@@ -70,7 +71,7 @@ func (h *ContractorHandler) CreateContractor(c *gin.Context) {
response, err := h.contractorService.CreateContractor(&req, user.ID)
if err != nil {
if errors.Is(err, services.ErrResidenceAccessDenied) {
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.residence_access_denied")})
return
}
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
@@ -84,7 +85,7 @@ func (h *ContractorHandler) UpdateContractor(c *gin.Context) {
user := c.MustGet(middleware.AuthUserKey).(*models.User)
contractorID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid contractor ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_contractor_id")})
return
}
@@ -98,9 +99,9 @@ func (h *ContractorHandler) UpdateContractor(c *gin.Context) {
if err != nil {
switch {
case errors.Is(err, services.ErrContractorNotFound):
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_not_found")})
case errors.Is(err, services.ErrContractorAccessDenied):
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_access_denied")})
default:
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
}
@@ -114,7 +115,7 @@ func (h *ContractorHandler) DeleteContractor(c *gin.Context) {
user := c.MustGet(middleware.AuthUserKey).(*models.User)
contractorID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid contractor ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_contractor_id")})
return
}
@@ -122,15 +123,15 @@ func (h *ContractorHandler) DeleteContractor(c *gin.Context) {
if err != nil {
switch {
case errors.Is(err, services.ErrContractorNotFound):
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_not_found")})
case errors.Is(err, services.ErrContractorAccessDenied):
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_access_denied")})
default:
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
}
return
}
c.JSON(http.StatusOK, gin.H{"message": "Contractor deleted successfully"})
c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.contractor_deleted")})
}
// ToggleFavorite handles POST /api/contractors/:id/toggle-favorite/
@@ -138,7 +139,7 @@ func (h *ContractorHandler) ToggleFavorite(c *gin.Context) {
user := c.MustGet(middleware.AuthUserKey).(*models.User)
contractorID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid contractor ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_contractor_id")})
return
}
@@ -146,9 +147,9 @@ func (h *ContractorHandler) ToggleFavorite(c *gin.Context) {
if err != nil {
switch {
case errors.Is(err, services.ErrContractorNotFound):
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_not_found")})
case errors.Is(err, services.ErrContractorAccessDenied):
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_access_denied")})
default:
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
}
@@ -162,7 +163,7 @@ func (h *ContractorHandler) GetContractorTasks(c *gin.Context) {
user := c.MustGet(middleware.AuthUserKey).(*models.User)
contractorID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid contractor ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_contractor_id")})
return
}
@@ -170,9 +171,9 @@ func (h *ContractorHandler) GetContractorTasks(c *gin.Context) {
if err != nil {
switch {
case errors.Is(err, services.ErrContractorNotFound):
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_not_found")})
case errors.Is(err, services.ErrContractorAccessDenied):
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.contractor_access_denied")})
default:
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
}
@@ -186,14 +187,14 @@ func (h *ContractorHandler) ListContractorsByResidence(c *gin.Context) {
user := c.MustGet(middleware.AuthUserKey).(*models.User)
residenceID, err := strconv.ParseUint(c.Param("residence_id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid residence ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_residence_id")})
return
}
response, err := h.contractorService.ListContractorsByResidence(uint(residenceID), user.ID)
if err != nil {
if errors.Is(err, services.ErrResidenceAccessDenied) {
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
c.JSON(http.StatusForbidden, gin.H{"error": i18n.LocalizedMessage(c, "error.residence_access_denied")})
return
}
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})