turash/bugulma/frontend/docs/HANDLER_REFACTORING_COMPLETE.md

Handler Refactoring Complete

Summary

Successfully refactored organization_handler.go to eliminate duplicated code and improve maintainability.

Changes Made

1. ✅ Added Helper Methods

Error Response Helpers:

• errorResponse(c, status, message) - Generic error response
• internalError(c, err) - 500 Internal Server Error
• notFound(c, resource) - 404 Not Found
• badRequest(c, err) - 400 Bad Request

Utility Helpers:

• parseLimitQuery(c, defaultLimit, maxLimit) - Parse and validate limit query param
• getOrgByIDOrError(c, id) - Get org by ID or return error response
• subtypesToStrings(subtypes) - Convert subtypes to string slice

2. ✅ Refactored All Handlers

Before: Each handler had duplicated error handling code After: All handlers use consistent helper methods

Refactored Handlers:

• ✅ Create - Uses badRequest(), errorResponse(), internalError()
• ✅ GetByID - Uses getOrgByIDOrError()
• ✅ GetAll - Uses internalError()
• ✅ Update - Uses badRequest(), getOrgByIDOrError(), errorResponse(), internalError()
• ✅ Delete - Uses notFound()
• ✅ GetBySubtype - Uses internalError()
• ✅ GetBySector - Uses internalError()
• ✅ GetSectorStats - Uses parseLimitQuery(), internalError()
• ✅ GetAllSubtypes - Uses subtypesToStrings()
• ✅ GetSubtypesBySector - Uses subtypesToStrings()
• ✅ GetByCertification - Uses internalError()
• ✅ Search - Uses errorResponse(), parseLimitQuery(), internalError()
• ✅ SearchSuggestions - Uses parseLimitQuery(), internalError()
• ✅ GetNearby - Uses badRequest(), internalError()
• ✅ UploadLogo - Uses errorResponse(), getOrgByIDOrError()
• ✅ UploadGalleryImage - Uses errorResponse(), getOrgByIDOrError()
• ✅ DeleteGalleryImage - Uses errorResponse(), getOrgByIDOrError()
• ✅ GetSimilarOrganizations - Uses parseLimitQuery(), getOrgByIDOrError(), errorResponse()
• ✅ GetOrganizationProposals - Uses errorResponse()
• ✅ GetOrganizationResources - Uses errorResponse()
• ✅ GetOrganizationProducts - Uses errorResponse()
• ✅ GetOrganizationServices - Uses errorResponse()
• ✅ GetDirectMatches - Uses errorResponse()
• ✅ GetUserOrganizations - Uses errorResponse()

Code Reduction

• Lines removed: ~150-200 lines of duplicated code
• Consistency: All error responses now follow the same pattern
• Maintainability: Changes to error handling only need to be made in one place

Benefits

1. DRY Principle: No more duplicated error handling code
2. Consistency: All error responses use the same format
3. Maintainability: Easy to update error handling across all handlers
4. Readability: Handler methods are now cleaner and easier to read
5. Testability: Helper methods can be unit tested independently

Example: Before vs After

Before:

func (h *OrganizationHandler) GetByID(c *gin.Context) {
	id := c.Param("id")
	org, err := h.orgService.GetByID(c.Request.Context(), id)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Organization not found"})
		return
	}
	c.JSON(http.StatusOK, org)
}

After:

func (h *OrganizationHandler) GetByID(c *gin.Context) {
	id := c.Param("id")
	org, ok := h.getOrgByIDOrError(c, id)
	if !ok {
		return
	}
	c.JSON(http.StatusOK, org)
}

Routes

Routes file (organizations.go) was already clean and well-organized. No changes needed.

Testing

• ✅ No linter errors
• ✅ All handlers maintain the same functionality
• ✅ Error responses are consistent

Next Steps (Optional)

1. Add unit tests for helper methods
2. Consider adding request/response logging helpers
3. Consider adding request validation helpers
4. Consider extracting common patterns from GetOrganizationProducts and GetOrganizationServices