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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
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13
internal/handlers/subscription_handler.go
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@@ -6,6 +6,7 @@ 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"
@@ -54,7 +55,7 @@ func (h *SubscriptionHandler) GetUpgradeTrigger(c *gin.Context) {
trigger, err := h.subscriptionService.GetUpgradeTrigger(key)
if err != nil {
if errors.Is(err, services.ErrUpgradeTriggerNotFound) {
c.JSON(http.StatusNotFound, gin.H{"error": err.Error()})
c.JSON(http.StatusNotFound, gin.H{"error": i18n.LocalizedMessage(c, "error.upgrade_trigger_not_found")})
return
}
c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
@@ -115,13 +116,13 @@ func (h *SubscriptionHandler) ProcessPurchase(c *gin.Context) {
switch req.Platform {
case "ios":
if req.ReceiptData == "" {
c.JSON(http.StatusBadRequest, gin.H{"error": "receipt_data is required for iOS"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.receipt_data_required")})
return
}
subscription, err = h.subscriptionService.ProcessApplePurchase(user.ID, req.ReceiptData)
case "android":
if req.PurchaseToken == "" {
c.JSON(http.StatusBadRequest, gin.H{"error": "purchase_token is required for Android"})
c.JSON(http.StatusBadRequest, gin.H{"error": i18n.LocalizedMessage(c, "error.purchase_token_required")})
return
}
subscription, err = h.subscriptionService.ProcessGooglePurchase(user.ID, req.PurchaseToken)
@@ -133,7 +134,7 @@ func (h *SubscriptionHandler) ProcessPurchase(c *gin.Context) {
}
c.JSON(http.StatusOK, gin.H{
"message": "Subscription upgraded successfully",
"message": i18n.LocalizedMessage(c, "message.subscription_upgraded"),
"subscription": subscription,
})
}
@@ -149,7 +150,7 @@ func (h *SubscriptionHandler) CancelSubscription(c *gin.Context) {
}
c.JSON(http.StatusOK, gin.H{
"message": "Subscription cancelled. You will retain Pro benefits until the end of your billing period.",
"message": i18n.LocalizedMessage(c, "message.subscription_cancelled"),
"subscription": subscription,
})
}
@@ -181,7 +182,7 @@ func (h *SubscriptionHandler) RestoreSubscription(c *gin.Context) {
}
c.JSON(http.StatusOK, gin.H{
"message": "Subscription restored successfully",
"message": i18n.LocalizedMessage(c, "message.subscription_restored"),
"subscription": subscription,
})
}