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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

17
internal/handlers/notification_handler.go
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@@ -7,6 +7,7 @@ import (
"github.com/gin-gonic/gin"
"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"
@@ -70,21 +71,21 @@ func (h *NotificationHandler) MarkAsRead(c *gin.Context) {
notificationID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid notification ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_notification_id")})
return
}
err = h.notificationService.MarkAsRead(uint(notificationID), user.ID)
if err != nil {
if errors.Is(err, services.ErrNotificationNotFound) {
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.notification_not_found")})
return
}
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
return
}
c.JSON(http.StatusOK, gin.H{"message": "Notification marked as read"})
c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.notification_marked_read")})
}
// MarkAllAsRead handles POST /api/notifications/mark-all-read/
@@ -97,7 +98,7 @@ func (h *NotificationHandler) MarkAllAsRead(c *gin.Context) {
return
}
c.JSON(http.StatusOK, gin.H{"message": "All notifications marked as read"})
c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.all_notifications_marked_read")})
}
// GetPreferences handles GET /api/notifications/preferences/
@@ -145,7 +146,7 @@ func (h *NotificationHandler) RegisterDevice(c *gin.Context) {
device, err := h.notificationService.RegisterDevice(user.ID, &req)
if err != nil {
if errors.Is(err, services.ErrInvalidPlatform) {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_platform")})
return
}
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
@@ -174,7 +175,7 @@ func (h *NotificationHandler) DeleteDevice(c *gin.Context) {
deviceID, err := strconv.ParseUint(c.Param("id"), 10, 32)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid device ID"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_device_id")})
return
}
@@ -186,12 +187,12 @@ func (h *NotificationHandler) DeleteDevice(c *gin.Context) {
err = h.notificationService.DeleteDevice(uint(deviceID), platform, user.ID)
if err != nil {
if errors.Is(err, services.ErrInvalidPlatform) {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.invalid_platform")})
return
}
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
return
}
c.JSON(http.StatusOK, gin.H{"message": "Device removed"})
c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.device_removed")})
}