mirror of
https://github.com/Dvorinka/MyClubServer.git
synced 2026-06-04 18:52:56 +00:00
Tomas Dvorak
331 lines
9.0 KiB
Markdown
331 lines
9.0 KiB
Markdown
# New Utility Controllers - Summary
|
|
|
|
## Overview
|
|
|
|
I've added **7 powerful utility controllers** that dramatically simplify development and reduce boilerplate code by up to **70%**.
|
|
|
|
## What's New
|
|
|
|
### ✅ 1. Response Helper (`response_helper.go`)
|
|
- **Purpose:** Standardized API responses
|
|
- **Global Variable:** `Respond`
|
|
- **Benefits:** Consistent format, easy error handling, metadata support
|
|
|
|
```go
|
|
Respond.Success(c, data, "Success message")
|
|
Respond.Created(c, newItem, "Item created")
|
|
Respond.NotFound(c, "Item not found")
|
|
```
|
|
|
|
### ✅ 2. Pagination Helper (`pagination_helper.go`)
|
|
- **Purpose:** One-line pagination for any query
|
|
- **Global Variable:** `Paginator`
|
|
- **Benefits:** Auto-extracts params, calculates metadata, supports preloading
|
|
|
|
```go
|
|
meta, err := Paginator.Paginate(c, query, &items)
|
|
Respond.SuccessWithMeta(c, items, meta, "Success")
|
|
```
|
|
|
|
### ✅ 3. Query Helper (`query_helper.go`)
|
|
- **Purpose:** Simplified filtering, sorting, and searching
|
|
- **Global Variable:** `QueryParser`
|
|
- **Benefits:** Fluent API, multiple filter types, chain builder
|
|
|
|
```go
|
|
query := QueryParser.BuildQueryChain(c, db).
|
|
WithSearch("title", "content").
|
|
WithSort("created_at", "desc").
|
|
WithBoolFilter("published", "published").
|
|
Build()
|
|
```
|
|
|
|
### ✅ 4. Validation Helper (`validation_helper.go`)
|
|
- **Purpose:** Struct validation with custom validators
|
|
- **Global Variable:** `Validator`
|
|
- **Benefits:** Auto-respond on errors, sanitization, custom validators
|
|
|
|
```go
|
|
if !Validator.ValidateAndRespond(c, req) {
|
|
return // Response already sent
|
|
}
|
|
title := Validator.SanitizeString(req.Title)
|
|
```
|
|
|
|
### ✅ 5. Audit Log Controller (`audit_log_controller.go`)
|
|
- **Purpose:** Track all important actions
|
|
- **Global Variable:** `AuditLogger`
|
|
- **Model:** `models.AuditLog`
|
|
- **Benefits:** Automatic user/IP tracking, before/after changes, searchable logs
|
|
|
|
```go
|
|
AuditLogger.LogCreate(c, "Article", article.ID, "Article created")
|
|
AuditLogger.LogUpdate(c, "Article", id, "Updated", before, after)
|
|
AuditLogger.LogDelete(c, "Article", id, "Deleted")
|
|
```
|
|
|
|
### ✅ 6. Batch Operations Controller (`batch_operations_controller.go`)
|
|
- **Purpose:** Bulk operations on multiple records
|
|
- **Global Variable:** `BatchOps`
|
|
- **Benefits:** Delete, update, publish, reorder multiple items at once
|
|
|
|
```go
|
|
BatchOps.BatchDelete(c, &models.Article{}, "articles")
|
|
BatchOps.BatchPublish(c, &models.Article{}, "articles", true)
|
|
```
|
|
|
|
### ✅ 7. Export Helper (`export_helper.go`)
|
|
- **Purpose:** Export data to CSV/JSON
|
|
- **Global Variable:** `Exporter`
|
|
- **Benefits:** Automatic file download, proper headers
|
|
|
|
```go
|
|
Exporter.ExportToCSV(c, articles, "articles.csv", headers)
|
|
Exporter.ExportToJSON(c, articles, "articles.json")
|
|
```
|
|
|
|
## Setup Instructions
|
|
|
|
### Step 1: Install Dependency
|
|
|
|
```bash
|
|
go get github.com/go-playground/validator/v10
|
|
```
|
|
|
|
### Step 2: Add Model to Migration
|
|
|
|
In `main.go`, add to `AutoMigrate`:
|
|
|
|
```go
|
|
&models.AuditLog{},
|
|
```
|
|
|
|
### Step 3: Initialize Global Helpers
|
|
|
|
Add after database initialization in `main.go`:
|
|
|
|
```go
|
|
// Initialize utility controllers
|
|
controllers.InitAuditLogger(dbInstance)
|
|
controllers.InitBatchOperations(dbInstance)
|
|
```
|
|
|
|
### Step 4: Use in Controllers
|
|
|
|
The global variables are ready to use:
|
|
- `controllers.Respond`
|
|
- `controllers.Paginator`
|
|
- `controllers.QueryParser`
|
|
- `controllers.Validator`
|
|
- `controllers.AuditLogger`
|
|
- `controllers.BatchOps`
|
|
- `controllers.Exporter`
|
|
|
|
## Example: Before vs After
|
|
|
|
### Before (Old Way) - 45 lines
|
|
|
|
```go
|
|
func GetArticles(c *gin.Context) {
|
|
// Parse pagination
|
|
page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
|
|
pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
|
|
if page < 1 {
|
|
page = 1
|
|
}
|
|
if pageSize < 1 || pageSize > 100 {
|
|
pageSize = 20
|
|
}
|
|
offset := (page - 1) * pageSize
|
|
|
|
// Build query
|
|
query := db.Model(&models.Article{})
|
|
|
|
// Search
|
|
if search := c.Query("search"); search != "" {
|
|
pattern := "%" + search + "%"
|
|
query = query.Where("title LIKE ? OR content LIKE ?", pattern, pattern)
|
|
}
|
|
|
|
// Filter
|
|
if published := c.Query("published"); published != "" {
|
|
query = query.Where("published = ?", published == "true")
|
|
}
|
|
|
|
// Sort
|
|
if sort := c.Query("sort"); sort != "" {
|
|
query = query.Order(sort)
|
|
} else {
|
|
query = query.Order("created_at DESC")
|
|
}
|
|
|
|
// Count total
|
|
var total int64
|
|
query.Count(&total)
|
|
|
|
// Execute
|
|
var articles []models.Article
|
|
if err := query.Offset(offset).Limit(pageSize).Find(&articles).Error; err != nil {
|
|
c.JSON(500, gin.H{"error": "Database error"})
|
|
return
|
|
}
|
|
|
|
// Response
|
|
c.JSON(200, gin.H{
|
|
"data": articles,
|
|
"page": page,
|
|
"total": total,
|
|
})
|
|
}
|
|
```
|
|
|
|
### After (New Way) - 11 lines
|
|
|
|
```go
|
|
func GetArticles(c *gin.Context) {
|
|
query := controllers.QueryParser.BuildQueryChain(c, db.Model(&models.Article{})).
|
|
WithSearch("title", "content").
|
|
WithSort("created_at", "desc").
|
|
WithBoolFilter("published", "published").
|
|
Build()
|
|
|
|
var articles []models.Article
|
|
meta, _ := controllers.Paginator.Paginate(c, query, &articles)
|
|
controllers.Respond.SuccessWithMeta(c, articles, meta, "Success")
|
|
}
|
|
```
|
|
|
|
**Result:** 75% less code, more features, better consistency!
|
|
|
|
## Real-World Example
|
|
|
|
See `poll_controller_refactored.go` for a complete CRUD controller using all utilities:
|
|
- ✅ Pagination with filtering
|
|
- ✅ Search and sort
|
|
- ✅ Input validation
|
|
- ✅ Sanitization
|
|
- ✅ Audit logging
|
|
- ✅ Batch operations
|
|
- ✅ Standardized responses
|
|
|
|
## API Examples
|
|
|
|
### List with Filters
|
|
```bash
|
|
GET /api/v1/articles?search=football&published=true&sort=created_at:desc&page=1&page_size=20
|
|
```
|
|
|
|
### Batch Delete
|
|
```bash
|
|
POST /api/v1/articles/batch-delete
|
|
Content-Type: application/json
|
|
|
|
{"ids": [1, 2, 3, 4, 5]}
|
|
```
|
|
|
|
### Batch Publish
|
|
```bash
|
|
POST /api/v1/articles/batch-publish
|
|
Content-Type: application/json
|
|
|
|
{"ids": [1, 2, 3]}
|
|
```
|
|
|
|
### Export to CSV
|
|
```bash
|
|
GET /api/v1/articles/export/csv
|
|
```
|
|
|
|
### Audit Logs
|
|
```bash
|
|
GET /api/v1/admin/audit-logs?action=CREATE&entity_type=Article&from=2024-01-01
|
|
```
|
|
|
|
## Files Created
|
|
|
|
1. ✅ `internal/controllers/response_helper.go`
|
|
2. ✅ `internal/controllers/pagination_helper.go`
|
|
3. ✅ `internal/controllers/query_helper.go`
|
|
4. ✅ `internal/controllers/validation_helper.go`
|
|
5. ✅ `internal/controllers/audit_log_controller.go`
|
|
6. ✅ `internal/controllers/batch_operations_controller.go`
|
|
7. ✅ `internal/controllers/export_helper.go`
|
|
8. ✅ `internal/controllers/example_usage_controller.go`
|
|
9. ✅ `internal/controllers/poll_controller_refactored.go`
|
|
10. ✅ `internal/models/audit_log.go`
|
|
11. ✅ `DOCS/NEW_UTILITY_CONTROLLERS_GUIDE.md` (Complete documentation)
|
|
|
|
## Benefits Summary
|
|
|
|
| Feature | Before | After | Improvement |
|
|
|---------|--------|-------|-------------|
|
|
| **Code Lines** | 45 | 11 | 75% reduction |
|
|
| **Response Format** | Inconsistent | Standardized | ✅ |
|
|
| **Pagination** | Manual | Automatic | ✅ |
|
|
| **Filtering** | Manual | Built-in | ✅ |
|
|
| **Searching** | Manual | Built-in | ✅ |
|
|
| **Sorting** | Manual | Built-in | ✅ |
|
|
| **Validation** | Manual | Automatic | ✅ |
|
|
| **Audit Logging** | None | Automatic | ✅ |
|
|
| **Batch Operations** | None | Built-in | ✅ |
|
|
| **Export** | None | Built-in | ✅ |
|
|
|
|
## Key Improvements
|
|
|
|
### 🚀 Productivity
|
|
- Write **70% less code** for common operations
|
|
- **Faster development** with ready-to-use utilities
|
|
- **Reduced bugs** through standardization
|
|
|
|
### 🎯 Consistency
|
|
- **Uniform API responses** across all endpoints
|
|
- **Standard error handling** patterns
|
|
- **Consistent validation** messages
|
|
|
|
### 🔧 Maintainability
|
|
- **Single source of truth** for common operations
|
|
- **Easy to update** - change once, apply everywhere
|
|
- **Better testing** - test utilities once
|
|
|
|
### 📊 Features
|
|
- **Advanced filtering** out of the box
|
|
- **Full-text search** across multiple fields
|
|
- **Audit trail** for compliance
|
|
- **Bulk operations** for efficiency
|
|
- **Data export** for reporting
|
|
|
|
### 🛡️ Security
|
|
- **Input validation** and sanitization
|
|
- **Audit logging** for accountability
|
|
- **Safe batch operations** with transaction support
|
|
|
|
## Next Steps
|
|
|
|
1. **Review documentation:** `DOCS/NEW_UTILITY_CONTROLLERS_GUIDE.md`
|
|
2. **Install dependency:** `go get github.com/go-playground/validator/v10`
|
|
3. **Add migration:** Add `&models.AuditLog{}` to AutoMigrate
|
|
4. **Initialize helpers:** Add init calls to `main.go`
|
|
5. **Refactor controllers:** Start using utilities in existing controllers
|
|
6. **Test endpoints:** Try the example API calls
|
|
|
|
## Support
|
|
|
|
For detailed usage examples, see:
|
|
- 📖 `DOCS/NEW_UTILITY_CONTROLLERS_GUIDE.md` - Complete guide
|
|
- 💡 `internal/controllers/example_usage_controller.go` - Usage examples
|
|
- 🔄 `internal/controllers/poll_controller_refactored.go` - Real refactoring example
|
|
|
|
## Questions?
|
|
|
|
Each utility controller is well-documented with:
|
|
- Purpose and benefits
|
|
- Usage examples
|
|
- Best practices
|
|
- Common patterns
|
|
|
|
Start with the guide in `DOCS/` and refer to example files for practical implementations.
|
|
|
|
---
|
|
|
|
**Your job is now easier, simpler, and better!** 🎉
|