Files
antrean-anjungan/tools/generate-handler.go
2025-08-18 20:02:34 +07:00

1315 lines
37 KiB
Go

package main
import (
"fmt"
"os"
"path/filepath"
"strings"
"time"
)
// HandlerData contains template data for handler generation
type HandlerData struct {
Name string
NameLower string
NamePlural string
Category string
CategoryPath string
ModuleName string
TableName string
HasGet bool
HasPost bool
HasPut bool
HasDelete bool
HasStats bool
HasFilter bool
HasPagination bool
Timestamp string
}
func main() {
if len(os.Args) < 2 {
fmt.Println("Usage: go run generate-handler.go [category/]entity [methods]")
fmt.Println("Examples:")
fmt.Println(" go run generate-handler.go product get post")
fmt.Println(" go run generate-handler.go reference/peserta get post put delete")
fmt.Println(" go run generate-handler.go master/wilayah get")
os.Exit(1)
}
// Parse entity path (could be "entity" or "category/entity")
entityPath := os.Args[1]
methods := []string{}
if len(os.Args) > 2 {
methods = os.Args[2:]
} else {
// Default methods if none specified
methods = []string{"get", "post", "put", "delete"}
}
// Parse category and entity
var category, entityName string
if strings.Contains(entityPath, "/") {
parts := strings.Split(entityPath, "/")
if len(parts) != 2 {
fmt.Println("❌ Error: Invalid path format. Use 'category/entity' or just 'entity'")
os.Exit(1)
}
category = parts[0]
entityName = parts[1]
} else {
category = ""
entityName = entityPath
}
// Format names
entityName = strings.Title(entityName) // PascalCase entity name
entityLower := strings.ToLower(entityName)
entityPlural := entityLower + "s"
// Table name: include category if exists
var tableName string
if category != "" {
tableName = "data_" + category + "_" + entityLower
} else {
tableName = "data_" + entityLower
}
data := HandlerData{
Name: entityName,
NameLower: entityLower,
NamePlural: entityPlural,
Category: category,
CategoryPath: category,
ModuleName: "api-service",
TableName: tableName,
HasPagination: true,
HasFilter: true,
Timestamp: time.Now().Format("2006-01-02 15:04:05"),
}
// Set methods based on arguments
for _, m := range methods {
switch strings.ToLower(m) {
case "get":
data.HasGet = true
case "post":
data.HasPost = true
case "put":
data.HasPut = true
case "delete":
data.HasDelete = true
case "stats":
data.HasStats = true
}
}
// Always add stats if we have get
if data.HasGet {
data.HasStats = true
}
// Create directories with improved logic
var handlerDir, modelDir string
if category != "" {
// Dengan kategori: internal/handlers/category/
handlerDir = filepath.Join("internal", "handlers", category)
modelDir = filepath.Join("internal", "models", category)
} else {
// Tanpa kategori: langsung internal/handlers/
handlerDir = filepath.Join("internal", "handlers")
modelDir = filepath.Join("internal", "models")
}
// Buat direktori
for _, d := range []string{handlerDir, modelDir} {
if err := os.MkdirAll(d, 0755); err != nil {
panic(err)
}
}
// Generate files
generateHandlerFile(data, handlerDir)
generateModelFile(data, modelDir)
updateRoutesFile(data)
fmt.Printf("✅ Successfully generated handler: %s\n", entityName)
if category != "" {
fmt.Printf("📁 Category: %s\n", category)
}
fmt.Printf("📁 Handler: %s\n", filepath.Join(handlerDir, entityLower+".go"))
fmt.Printf("📁 Model: %s\n", filepath.Join(modelDir, entityLower+".go"))
}
// ================= HANDLER GENERATION =====================
func generateHandlerFile(data HandlerData, handlerDir string) {
// Build import path based on category
var modelsImportPath string
if data.Category != "" {
modelsImportPath = data.ModuleName + "/internal/models/" + data.Category
} else {
modelsImportPath = data.ModuleName + "/internal/models"
}
handlerContent := `package handlers
import (
"` + data.ModuleName + `/internal/config"
"` + data.ModuleName + `/internal/database"
models "` + modelsImportPath + `"
"context"
"database/sql"
"fmt"
"log"
"net/http"
"strconv"
"strings"
"sync"
"time"
"github.com/gin-gonic/gin"
"github.com/go-playground/validator/v10"
"github.com/google/uuid"
)
var (
db database.Service
once sync.Once
validate *validator.Validate
)
// Initialize the database connection and validator
func init() {
once.Do(func() {
db = database.New(config.LoadConfig())
validate = validator.New()
// Register custom validations if needed
validate.RegisterValidation("` + data.NameLower + `_status", validate` + data.Name + `Status)
if db == nil {
log.Fatal("Failed to initialize database connection")
}
})
}
// Custom validation for ` + data.NameLower + ` status
func validate` + data.Name + `Status(fl validator.FieldLevel) bool {
return models.IsValidStatus(fl.Field().String())
}
// ` + data.Name + `Handler handles ` + data.NameLower + ` services
type ` + data.Name + `Handler struct {
db database.Service
}
// New` + data.Name + `Handler creates a new ` + data.Name + `Handler
func New` + data.Name + `Handler() *` + data.Name + `Handler {
return &` + data.Name + `Handler{
db: db,
}
}`
// Add methods
if data.HasGet {
handlerContent += generateGetMethods(data)
}
if data.HasPost {
handlerContent += generateCreateMethod(data)
}
if data.HasPut {
handlerContent += generateUpdateMethod(data)
}
if data.HasDelete {
handlerContent += generateDeleteMethod(data)
}
if data.HasStats {
handlerContent += generateStatsMethod(data)
}
// Add helper methods
handlerContent += generateHelperMethods(data)
writeFile(filepath.Join(handlerDir, data.NameLower+".go"), handlerContent)
}
func generateGetMethods(data HandlerData) string {
// Build route path based on category
var routePath, singleRoutePath string
if data.Category != "" {
routePath = data.Category + "/" + data.NamePlural
singleRoutePath = data.Category + "/" + data.NameLower
} else {
routePath = data.NamePlural
singleRoutePath = data.NameLower
}
return `
// Get` + data.Name + ` godoc
// @Summary Get ` + data.NameLower + ` with pagination and optional aggregation
// @Description Returns a paginated list of ` + data.NamePlural + ` with optional summary statistics
// @Tags ` + data.NameLower + `
// @Accept json
// @Produce json
// @Param limit query int false "Limit (max 100)" default(10)
// @Param offset query int false "Offset" default(0)
// @Param include_summary query bool false "Include aggregation summary" default(false)
// @Param status query string false "Filter by status"
// @Param search query string false "Search in multiple fields"
// @Success 200 {object} models.` + data.Name + `GetResponse "Success response"
// @Failure 400 {object} models.ErrorResponse "Bad request"
// @Failure 500 {object} models.ErrorResponse "Internal server error"
// @Router /api/v1/` + routePath + ` [get]
func (h *` + data.Name + `Handler) Get` + data.Name + `(c *gin.Context) {
// Parse pagination parameters
limit, offset, err := h.parsePaginationParams(c)
if err != nil {
h.respondError(c, "Invalid pagination parameters", err, http.StatusBadRequest)
return
}
// Parse filter parameters
filter := h.parseFilterParams(c)
includeAggregation := c.Query("include_summary") == "true"
// Get database connection
dbConn, err := h.db.GetDB("satudata")
if err != nil {
h.logAndRespondError(c, "Database connection failed", err, http.StatusInternalServerError)
return
}
// Create context with timeout
ctx, cancel := context.WithTimeout(c.Request.Context(), 30*time.Second)
defer cancel()
// Execute concurrent operations
var (
items []models.` + data.Name + `
total int
aggregateData *models.AggregateData
wg sync.WaitGroup
errChan = make(chan error, 3)
mu sync.Mutex
)
// Fetch total count
wg.Add(1)
go func() {
defer wg.Done()
if err := h.getTotalCount(ctx, dbConn, filter, &total); err != nil {
mu.Lock()
errChan <- fmt.Errorf("failed to get total count: %w", err)
mu.Unlock()
}
}()
// Fetch main data
wg.Add(1)
go func() {
defer wg.Done()
result, err := h.fetch` + data.Name + `s(ctx, dbConn, filter, limit, offset)
mu.Lock()
if err != nil {
errChan <- fmt.Errorf("failed to fetch data: %w", err)
} else {
items = result
}
mu.Unlock()
}()
// Fetch aggregation data if requested
if includeAggregation {
wg.Add(1)
go func() {
defer wg.Done()
result, err := h.getAggregateData(ctx, dbConn, filter)
mu.Lock()
if err != nil {
errChan <- fmt.Errorf("failed to get aggregate data: %w", err)
} else {
aggregateData = result
}
mu.Unlock()
}()
}
// Wait for all goroutines
wg.Wait()
close(errChan)
// Check for errors
for err := range errChan {
if err != nil {
h.logAndRespondError(c, "Data processing failed", err, http.StatusInternalServerError)
return
}
}
// Build response
meta := h.calculateMeta(limit, offset, total)
response := models.` + data.Name + `GetResponse{
Message: "Data ` + data.NameLower + ` berhasil diambil",
Data: items,
Meta: meta,
}
if includeAggregation && aggregateData != nil {
response.Summary = aggregateData
}
c.JSON(http.StatusOK, response)
}
// Get` + data.Name + `ByID godoc
// @Summary Get ` + data.Name + ` by ID
// @Description Returns a single ` + data.NameLower + ` by ID
// @Tags ` + data.NameLower + `
// @Accept json
// @Produce json
// @Param id path string true "` + data.Name + ` ID (UUID)"
// @Success 200 {object} models.` + data.Name + `GetByIDResponse "Success response"
// @Failure 400 {object} models.ErrorResponse "Invalid ID format"
// @Failure 404 {object} models.ErrorResponse "` + data.Name + ` not found"
// @Failure 500 {object} models.ErrorResponse "Internal server error"
// @Router /api/v1/` + singleRoutePath + `/{id} [get]
func (h *` + data.Name + `Handler) Get` + data.Name + `ByID(c *gin.Context) {
id := c.Param("id")
// Validate UUID format
if _, err := uuid.Parse(id); err != nil {
h.respondError(c, "Invalid ID format", err, http.StatusBadRequest)
return
}
dbConn, err := h.db.GetDB("satudata")
if err != nil {
h.logAndRespondError(c, "Database connection failed", err, http.StatusInternalServerError)
return
}
ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
defer cancel()
item, err := h.get` + data.Name + `ByID(ctx, dbConn, id)
if err != nil {
if err == sql.ErrNoRows {
h.respondError(c, "` + data.Name + ` not found", err, http.StatusNotFound)
} else {
h.logAndRespondError(c, "Failed to get ` + data.NameLower + `", err, http.StatusInternalServerError)
}
return
}
response := models.` + data.Name + `GetByIDResponse{
Message: "` + data.Name + ` details retrieved successfully",
Data: item,
}
c.JSON(http.StatusOK, response)
}`
}
func generateCreateMethod(data HandlerData) string {
var routePath string
if data.Category != "" {
routePath = data.Category + "/" + data.NamePlural
} else {
routePath = data.NamePlural
}
return `
// Create` + data.Name + ` godoc
// @Summary Create ` + data.NameLower + `
// @Description Creates a new ` + data.NameLower + ` record
// @Tags ` + data.NameLower + `
// @Accept json
// @Produce json
// @Param request body models.` + data.Name + `CreateRequest true "` + data.Name + ` creation request"
// @Success 201 {object} models.` + data.Name + `CreateResponse "` + data.Name + ` created successfully"
// @Failure 400 {object} models.ErrorResponse "Bad request or validation error"
// @Failure 500 {object} models.ErrorResponse "Internal server error"
// @Router /api/v1/` + routePath + ` [post]
func (h *` + data.Name + `Handler) Create` + data.Name + `(c *gin.Context) {
var req models.` + data.Name + `CreateRequest
if err := c.ShouldBindJSON(&req); err != nil {
h.respondError(c, "Invalid request body", err, http.StatusBadRequest)
return
}
// Validate request
if err := validate.Struct(&req); err != nil {
h.respondError(c, "Validation failed", err, http.StatusBadRequest)
return
}
dbConn, err := h.db.GetDB("satudata")
if err != nil {
h.logAndRespondError(c, "Database connection failed", err, http.StatusInternalServerError)
return
}
ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
defer cancel()
item, err := h.create` + data.Name + `(ctx, dbConn, &req)
if err != nil {
h.logAndRespondError(c, "Failed to create ` + data.NameLower + `", err, http.StatusInternalServerError)
return
}
response := models.` + data.Name + `CreateResponse{
Message: "` + data.Name + ` berhasil dibuat",
Data: item,
}
c.JSON(http.StatusCreated, response)
}`
}
func generateUpdateMethod(data HandlerData) string {
var singleRoutePath string
if data.Category != "" {
singleRoutePath = data.Category + "/" + data.NameLower
} else {
singleRoutePath = data.NameLower
}
return `
// Update` + data.Name + ` godoc
// @Summary Update ` + data.NameLower + `
// @Description Updates an existing ` + data.NameLower + ` record
// @Tags ` + data.NameLower + `
// @Accept json
// @Produce json
// @Param id path string true "` + data.Name + ` ID (UUID)"
// @Param request body models.` + data.Name + `UpdateRequest true "` + data.Name + ` update request"
// @Success 200 {object} models.` + data.Name + `UpdateResponse "` + data.Name + ` updated successfully"
// @Failure 400 {object} models.ErrorResponse "Bad request or validation error"
// @Failure 404 {object} models.ErrorResponse "` + data.Name + ` not found"
// @Failure 500 {object} models.ErrorResponse "Internal server error"
// @Router /api/v1/` + singleRoutePath + `/{id} [put]
func (h *` + data.Name + `Handler) Update` + data.Name + `(c *gin.Context) {
id := c.Param("id")
// Validate UUID format
if _, err := uuid.Parse(id); err != nil {
h.respondError(c, "Invalid ID format", err, http.StatusBadRequest)
return
}
var req models.` + data.Name + `UpdateRequest
if err := c.ShouldBindJSON(&req); err != nil {
h.respondError(c, "Invalid request body", err, http.StatusBadRequest)
return
}
// Set ID from path parameter
req.ID = id
// Validate request
if err := validate.Struct(&req); err != nil {
h.respondError(c, "Validation failed", err, http.StatusBadRequest)
return
}
dbConn, err := h.db.GetDB("satudata")
if err != nil {
h.logAndRespondError(c, "Database connection failed", err, http.StatusInternalServerError)
return
}
ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
defer cancel()
item, err := h.update` + data.Name + `(ctx, dbConn, &req)
if err != nil {
if err == sql.ErrNoRows {
h.respondError(c, "` + data.Name + ` not found", err, http.StatusNotFound)
} else {
h.logAndRespondError(c, "Failed to update ` + data.NameLower + `", err, http.StatusInternalServerError)
}
return
}
response := models.` + data.Name + `UpdateResponse{
Message: "` + data.Name + ` berhasil diperbarui",
Data: item,
}
c.JSON(http.StatusOK, response)
}`
}
func generateDeleteMethod(data HandlerData) string {
var singleRoutePath string
if data.Category != "" {
singleRoutePath = data.Category + "/" + data.NameLower
} else {
singleRoutePath = data.NameLower
}
return `
// Delete` + data.Name + ` godoc
// @Summary Delete ` + data.NameLower + `
// @Description Soft deletes a ` + data.NameLower + ` by setting status to 'deleted'
// @Tags ` + data.NameLower + `
// @Accept json
// @Produce json
// @Param id path string true "` + data.Name + ` ID (UUID)"
// @Success 200 {object} models.` + data.Name + `DeleteResponse "` + data.Name + ` deleted successfully"
// @Failure 400 {object} models.ErrorResponse "Invalid ID format"
// @Failure 404 {object} models.ErrorResponse "` + data.Name + ` not found"
// @Failure 500 {object} models.ErrorResponse "Internal server error"
// @Router /api/v1/` + singleRoutePath + `/{id} [delete]
func (h *` + data.Name + `Handler) Delete` + data.Name + `(c *gin.Context) {
id := c.Param("id")
// Validate UUID format
if _, err := uuid.Parse(id); err != nil {
h.respondError(c, "Invalid ID format", err, http.StatusBadRequest)
return
}
dbConn, err := h.db.GetDB("satudata")
if err != nil {
h.logAndRespondError(c, "Database connection failed", err, http.StatusInternalServerError)
return
}
ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
defer cancel()
err = h.delete` + data.Name + `(ctx, dbConn, id)
if err != nil {
if err == sql.ErrNoRows {
h.respondError(c, "` + data.Name + ` not found", err, http.StatusNotFound)
} else {
h.logAndRespondError(c, "Failed to delete ` + data.NameLower + `", err, http.StatusInternalServerError)
}
return
}
response := models.` + data.Name + `DeleteResponse{
Message: "` + data.Name + ` berhasil dihapus",
ID: id,
}
c.JSON(http.StatusOK, response)
}`
}
func generateStatsMethod(data HandlerData) string {
var routePath string
if data.Category != "" {
routePath = data.Category + "/" + data.NamePlural
} else {
routePath = data.NamePlural
}
return `
// Get` + data.Name + `Stats godoc
// @Summary Get ` + data.NameLower + ` statistics
// @Description Returns comprehensive statistics about ` + data.NameLower + ` data
// @Tags ` + data.NameLower + `
// @Accept json
// @Produce json
// @Param status query string false "Filter statistics by status"
// @Success 200 {object} models.AggregateData "Statistics data"
// @Failure 500 {object} models.ErrorResponse "Internal server error"
// @Router /api/v1/` + routePath + `/stats [get]
func (h *` + data.Name + `Handler) Get` + data.Name + `Stats(c *gin.Context) {
dbConn, err := h.db.GetDB("satudata")
if err != nil {
h.logAndRespondError(c, "Database connection failed", err, http.StatusInternalServerError)
return
}
ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
defer cancel()
filter := h.parseFilterParams(c)
aggregateData, err := h.getAggregateData(ctx, dbConn, filter)
if err != nil {
h.logAndRespondError(c, "Failed to get statistics", err, http.StatusInternalServerError)
return
}
c.JSON(http.StatusOK, gin.H{
"message": "Statistik ` + data.NameLower + ` berhasil diambil",
"data": aggregateData,
})
}`
}
func generateHelperMethods(data HandlerData) string {
return `
// Database operations
func (h *` + data.Name + `Handler) get` + data.Name + `ByID(ctx context.Context, dbConn *sql.DB, id string) (*models.` + data.Name + `, error) {
query := "SELECT id, status, date_created, date_updated, name FROM ` + data.TableName + ` WHERE id = $1 AND status != 'deleted'"
row := dbConn.QueryRowContext(ctx, query, id)
var item models.` + data.Name + `
err := row.Scan(&item.ID, &item.Status, &item.DateCreated, &item.DateUpdated, &item.Name)
if err != nil {
return nil, err
}
return &item, nil
}
func (h *` + data.Name + `Handler) create` + data.Name + `(ctx context.Context, dbConn *sql.DB, req *models.` + data.Name + `CreateRequest) (*models.` + data.Name + `, error) {
id := uuid.New().String()
now := time.Now()
query := "INSERT INTO ` + data.TableName + ` (id, status, date_created, date_updated, name) VALUES ($1, $2, $3, $4, $5) RETURNING id, status, date_created, date_updated, name"
row := dbConn.QueryRowContext(ctx, query, id, req.Status, now, now, req.Name)
var item models.` + data.Name + `
err := row.Scan(&item.ID, &item.Status, &item.DateCreated, &item.DateUpdated, &item.Name)
if err != nil {
return nil, fmt.Errorf("failed to create ` + data.NameLower + `: %w", err)
}
return &item, nil
}
func (h *` + data.Name + `Handler) update` + data.Name + `(ctx context.Context, dbConn *sql.DB, req *models.` + data.Name + `UpdateRequest) (*models.` + data.Name + `, error) {
now := time.Now()
query := "UPDATE ` + data.TableName + ` SET status = $2, date_updated = $3, name = $4 WHERE id = $1 AND status != 'deleted' RETURNING id, status, date_created, date_updated, name"
row := dbConn.QueryRowContext(ctx, query, req.ID, req.Status, now, req.Name)
var item models.` + data.Name + `
err := row.Scan(&item.ID, &item.Status, &item.DateCreated, &item.DateUpdated, &item.Name)
if err != nil {
return nil, fmt.Errorf("failed to update ` + data.NameLower + `: %w", err)
}
return &item, nil
}
func (h *` + data.Name + `Handler) delete` + data.Name + `(ctx context.Context, dbConn *sql.DB, id string) error {
now := time.Now()
query := "UPDATE ` + data.TableName + ` SET status = 'deleted', date_updated = $2 WHERE id = $1 AND status != 'deleted'"
result, err := dbConn.ExecContext(ctx, query, id, now)
if err != nil {
return fmt.Errorf("failed to delete ` + data.NameLower + `: %w", err)
}
rowsAffected, err := result.RowsAffected()
if err != nil {
return fmt.Errorf("failed to get affected rows: %w", err)
}
if rowsAffected == 0 {
return sql.ErrNoRows
}
return nil
}
func (h *` + data.Name + `Handler) fetch` + data.Name + `s(ctx context.Context, dbConn *sql.DB, filter models.` + data.Name + `Filter, limit, offset int) ([]models.` + data.Name + `, error) {
whereClause, args := h.buildWhereClause(filter)
query := fmt.Sprintf("SELECT id, status, date_created, date_updated, name FROM ` + data.TableName + ` WHERE %s ORDER BY date_created DESC NULLS LAST LIMIT $%d OFFSET $%d", whereClause, len(args)+1, len(args)+2)
args = append(args, limit, offset)
rows, err := dbConn.QueryContext(ctx, query, args...)
if err != nil {
return nil, fmt.Errorf("fetch ` + data.NamePlural + ` query failed: %w", err)
}
defer rows.Close()
items := make([]models.` + data.Name + `, 0, limit)
for rows.Next() {
var item models.` + data.Name + `
err := rows.Scan(&item.ID, &item.Status, &item.DateCreated, &item.DateUpdated, &item.Name)
if err != nil {
return nil, fmt.Errorf("scan ` + data.Name + ` failed: %w", err)
}
items = append(items, item)
}
if err := rows.Err(); err != nil {
return nil, fmt.Errorf("rows iteration error: %w", err)
}
return items, nil
}
func (h *` + data.Name + `Handler) getTotalCount(ctx context.Context, dbConn *sql.DB, filter models.` + data.Name + `Filter, total *int) error {
whereClause, args := h.buildWhereClause(filter)
countQuery := fmt.Sprintf("SELECT COUNT(*) FROM ` + data.TableName + ` WHERE %s", whereClause)
if err := dbConn.QueryRowContext(ctx, countQuery, args...).Scan(total); err != nil {
return fmt.Errorf("total count query failed: %w", err)
}
return nil
}
func (h *` + data.Name + `Handler) getAggregateData(ctx context.Context, dbConn *sql.DB, filter models.` + data.Name + `Filter) (*models.AggregateData, error) {
aggregate := &models.AggregateData{
ByStatus: make(map[string]int),
}
whereClause, args := h.buildWhereClause(filter)
statusQuery := fmt.Sprintf("SELECT status, COUNT(*) FROM ` + data.TableName + ` WHERE %s GROUP BY status ORDER BY status", whereClause)
rows, err := dbConn.QueryContext(ctx, statusQuery, args...)
if err != nil {
return nil, fmt.Errorf("status query failed: %w", err)
}
defer rows.Close()
for rows.Next() {
var status string
var count int
if err := rows.Scan(&status, &count); err != nil {
return nil, fmt.Errorf("status scan failed: %w", err)
}
aggregate.ByStatus[status] = count
switch status {
case "active":
aggregate.TotalActive = count
case "draft":
aggregate.TotalDraft = count
case "inactive":
aggregate.TotalInactive = count
}
}
return aggregate, nil
}
// Helper methods
func (h *` + data.Name + `Handler) logAndRespondError(c *gin.Context, message string, err error, statusCode int) {
log.Printf("[ERROR] %s: %v", message, err)
h.respondError(c, message, err, statusCode)
}
func (h *` + data.Name + `Handler) respondError(c *gin.Context, message string, err error, statusCode int) {
errorMessage := message
if gin.Mode() == gin.ReleaseMode {
errorMessage = "Internal server error"
}
c.JSON(statusCode, models.ErrorResponse{
Error: errorMessage,
Code: statusCode,
Message: err.Error(),
Timestamp: time.Now(),
})
}
func (h *` + data.Name + `Handler) parsePaginationParams(c *gin.Context) (int, int, error) {
limit := 10 // Default limit
offset := 0 // Default offset
if limitStr := c.Query("limit"); limitStr != "" {
parsedLimit, err := strconv.Atoi(limitStr)
if err != nil {
return 0, 0, fmt.Errorf("invalid limit parameter: %s", limitStr)
}
if parsedLimit <= 0 {
return 0, 0, fmt.Errorf("limit must be greater than 0")
}
if parsedLimit > 100 {
return 0, 0, fmt.Errorf("limit cannot exceed 100")
}
limit = parsedLimit
}
if offsetStr := c.Query("offset"); offsetStr != "" {
parsedOffset, err := strconv.Atoi(offsetStr)
if err != nil {
return 0, 0, fmt.Errorf("invalid offset parameter: %s", offsetStr)
}
if parsedOffset < 0 {
return 0, 0, fmt.Errorf("offset cannot be negative")
}
offset = parsedOffset
}
return limit, offset, nil
}
func (h *` + data.Name + `Handler) parseFilterParams(c *gin.Context) models.` + data.Name + `Filter {
filter := models.` + data.Name + `Filter{}
if status := c.Query("status"); status != "" {
if models.IsValidStatus(status) {
filter.Status = &status
}
}
if search := c.Query("search"); search != "" {
filter.Search = &search
}
// Parse date filters
if dateFromStr := c.Query("date_from"); dateFromStr != "" {
if dateFrom, err := time.Parse("2006-01-02", dateFromStr); err == nil {
filter.DateFrom = &dateFrom
}
}
if dateToStr := c.Query("date_to"); dateToStr != "" {
if dateTo, err := time.Parse("2006-01-02", dateToStr); err == nil {
filter.DateTo = &dateTo
}
}
return filter
}
func (h *` + data.Name + `Handler) buildWhereClause(filter models.` + data.Name + `Filter) (string, []interface{}) {
conditions := []string{"status != 'deleted'"}
args := []interface{}{}
paramCount := 1
if filter.Status != nil {
conditions = append(conditions, fmt.Sprintf("status = $%d", paramCount))
args = append(args, *filter.Status)
paramCount++
}
if filter.Search != nil {
searchCondition := fmt.Sprintf("name ILIKE $%d", paramCount)
conditions = append(conditions, searchCondition)
searchTerm := "%" + *filter.Search + "%"
args = append(args, searchTerm)
paramCount++
}
if filter.DateFrom != nil {
conditions = append(conditions, fmt.Sprintf("date_created >= $%d", paramCount))
args = append(args, *filter.DateFrom)
paramCount++
}
if filter.DateTo != nil {
conditions = append(conditions, fmt.Sprintf("date_created <= $%d", paramCount))
args = append(args, filter.DateTo.Add(24*time.Hour-time.Nanosecond))
paramCount++
}
return strings.Join(conditions, " AND "), args
}
func (h *` + data.Name + `Handler) calculateMeta(limit, offset, total int) models.MetaResponse {
totalPages := 0
currentPage := 1
if limit > 0 {
totalPages = (total + limit - 1) / limit // Ceiling division
currentPage = (offset / limit) + 1
}
return models.MetaResponse{
Limit: limit,
Offset: offset,
Total: total,
TotalPages: totalPages,
CurrentPage: currentPage,
HasNext: offset+limit < total,
HasPrev: offset > 0,
}
}`
}
// ================= MODEL GENERATION =====================
func generateModelFile(data HandlerData, modelDir string) {
modelContent := `package models
import (
"database/sql"
"database/sql/driver"
"encoding/json"
"time"
)
// NullableInt32 is a custom type to replace sql.NullInt32 for swagger compatibility
type NullableInt32 struct {
Int32 int32 ` + "`json:\"int32,omitempty\"`" + `
Valid bool ` + "`json:\"valid\"`" + `
}
// Scan implements the sql.Scanner interface for NullableInt32
func (n *NullableInt32) Scan(value interface{}) error {
var ni sql.NullInt32
if err := ni.Scan(value); err != nil {
return err
}
n.Int32 = ni.Int32
n.Valid = ni.Valid
return nil
}
// Value implements the driver.Valuer interface for NullableInt32
func (n NullableInt32) Value() (driver.Value, error) {
if !n.Valid {
return nil, nil
}
return n.Int32, nil
}
// ` + data.Name + ` represents the data structure for the ` + data.NameLower + ` table
type ` + data.Name + ` struct {
ID string ` + "`json:\"id\" db:\"id\"`" + `
Status string ` + "`json:\"status\" db:\"status\"`" + `
Sort NullableInt32 ` + "`json:\"sort,omitempty\" db:\"sort\"`" + `
UserCreated sql.NullString ` + "`json:\"user_created,omitempty\" db:\"user_created\"`" + `
DateCreated sql.NullTime ` + "`json:\"date_created,omitempty\" db:\"date_created\"`" + `
UserUpdated sql.NullString ` + "`json:\"user_updated,omitempty\" db:\"user_updated\"`" + `
DateUpdated sql.NullTime ` + "`json:\"date_updated,omitempty\" db:\"date_updated\"`" + `
Name sql.NullString ` + "`json:\"name,omitempty\" db:\"name\"`" + `
}
// Custom JSON marshaling for ` + data.Name + `
func (r ` + data.Name + `) MarshalJSON() ([]byte, error) {
type Alias ` + data.Name + `
aux := &struct {
Sort *int ` + "`json:\"sort,omitempty\"`" + `
UserCreated *string ` + "`json:\"user_created,omitempty\"`" + `
DateCreated *time.Time ` + "`json:\"date_created,omitempty\"`" + `
UserUpdated *string ` + "`json:\"user_updated,omitempty\"`" + `
DateUpdated *time.Time ` + "`json:\"date_updated,omitempty\"`" + `
Name *string ` + "`json:\"name,omitempty\"`" + `
*Alias
}{
Alias: (*Alias)(&r),
}
if r.Sort.Valid {
sort := int(r.Sort.Int32)
aux.Sort = &sort
}
if r.UserCreated.Valid {
aux.UserCreated = &r.UserCreated.String
}
if r.DateCreated.Valid {
aux.DateCreated = &r.DateCreated.Time
}
if r.UserUpdated.Valid {
aux.UserUpdated = &r.UserUpdated.String
}
if r.DateUpdated.Valid {
aux.DateUpdated = &r.DateUpdated.Time
}
if r.Name.Valid {
aux.Name = &r.Name.String
}
return json.Marshal(aux)
}
// Helper methods
func (r *` + data.Name + `) GetName() string {
if r.Name.Valid {
return r.Name.String
}
return ""
}`
// Add request/response structs based on enabled methods
if data.HasGet {
modelContent += `
// Response struct for GET by ID
type ` + data.Name + `GetByIDResponse struct {
Message string ` + "`json:\"message\"`" + `
Data *` + data.Name + ` ` + "`json:\"data\"`" + `
}
// Enhanced GET response with pagination and aggregation
type ` + data.Name + `GetResponse struct {
Message string ` + "`json:\"message\"`" + `
Data []` + data.Name + ` ` + "`json:\"data\"`" + `
Meta MetaResponse ` + "`json:\"meta\"`" + `
Summary *AggregateData ` + "`json:\"summary,omitempty\"`" + `
}`
}
if data.HasPost {
modelContent += `
// Request struct for create
type ` + data.Name + `CreateRequest struct {
Status string ` + "`json:\"status\" validate:\"required,oneof=draft active inactive\"`" + `
Name *string ` + "`json:\"name,omitempty\" validate:\"omitempty,min=1,max=255\"`" + `
}
// Response struct for create
type ` + data.Name + `CreateResponse struct {
Message string ` + "`json:\"message\"`" + `
Data *` + data.Name + ` ` + "`json:\"data\"`" + `
}`
}
if data.HasPut {
modelContent += `
// Update request
type ` + data.Name + `UpdateRequest struct {
ID string ` + "`json:\"-\" validate:\"required,uuid4\"`" + ` // ID dari URL path
Status string ` + "`json:\"status\" validate:\"required,oneof=draft active inactive\"`" + `
Name *string ` + "`json:\"name,omitempty\" validate:\"omitempty,min=1,max=255\"`" + `
}
// Response struct for update
type ` + data.Name + `UpdateResponse struct {
Message string ` + "`json:\"message\"`" + `
Data *` + data.Name + ` ` + "`json:\"data\"`" + `
}`
}
if data.HasDelete {
modelContent += `
// Response struct for delete
type ` + data.Name + `DeleteResponse struct {
Message string ` + "`json:\"message\"`" + `
ID string ` + "`json:\"id\"`" + `
}`
}
// Add common structs
modelContent += `
// Metadata for pagination
type MetaResponse struct {
Limit int ` + "`json:\"limit\"`" + `
Offset int ` + "`json:\"offset\"`" + `
Total int ` + "`json:\"total\"`" + `
TotalPages int ` + "`json:\"total_pages\"`" + `
CurrentPage int ` + "`json:\"current_page\"`" + `
HasNext bool ` + "`json:\"has_next\"`" + `
HasPrev bool ` + "`json:\"has_prev\"`" + `
}
// Aggregate data for summary
type AggregateData struct {
TotalActive int ` + "`json:\"total_active\"`" + `
TotalDraft int ` + "`json:\"total_draft\"`" + `
TotalInactive int ` + "`json:\"total_inactive\"`" + `
ByStatus map[string]int ` + "`json:\"by_status\"`" + `
LastUpdated *time.Time ` + "`json:\"last_updated,omitempty\"`" + `
CreatedToday int ` + "`json:\"created_today\"`" + `
UpdatedToday int ` + "`json:\"updated_today\"`" + `
}
// Error response
type ErrorResponse struct {
Error string ` + "`json:\"error\"`" + `
Code int ` + "`json:\"code\"`" + `
Message string ` + "`json:\"message\"`" + `
Timestamp time.Time ` + "`json:\"timestamp\"`" + `
}
// Filter struct for query parameters
type ` + data.Name + `Filter struct {
Status *string ` + "`json:\"status,omitempty\" form:\"status\"`" + `
Search *string ` + "`json:\"search,omitempty\" form:\"search\"`" + `
DateFrom *time.Time ` + "`json:\"date_from,omitempty\" form:\"date_from\"`" + `
DateTo *time.Time ` + "`json:\"date_to,omitempty\" form:\"date_to\"`" + `
}
// Validation constants
const (
StatusDraft = "draft"
StatusActive = "active"
StatusInactive = "inactive"
StatusDeleted = "deleted"
)
// ValidStatuses for validation
var ValidStatuses = []string{StatusDraft, StatusActive, StatusInactive}
// IsValidStatus helper function
func IsValidStatus(status string) bool {
for _, validStatus := range ValidStatuses {
if status == validStatus {
return true
}
}
return false
}`
writeFile(filepath.Join(modelDir, data.NameLower+".go"), modelContent)
}
// ================= ROUTES GENERATION =====================
func updateRoutesFile(data HandlerData) {
routesFile := "internal/routes/v1/routes.go"
content, err := os.ReadFile(routesFile)
if err != nil {
fmt.Printf("⚠️ Could not read routes.go: %v\n", err)
fmt.Printf("📝 Please manually add these routes to your routes.go file:\n")
printRoutesSample(data)
return
}
routesContent := string(content)
// Build import path - PERBAIKAN UTAMA
var importPath, importAlias string
if data.Category != "" {
importPath = fmt.Sprintf("%s/internal/handlers/%s", data.ModuleName, data.Category)
importAlias = data.NameLower + "Handlers"
} else {
importPath = fmt.Sprintf("%s/internal/handlers", data.ModuleName)
importAlias = data.NameLower + "Handlers"
}
// import
importPattern := fmt.Sprintf("%s \"%s\"", importAlias, importPath)
if !strings.Contains(routesContent, importPattern) {
importToAdd := fmt.Sprintf("\t%s \"%s\"", importAlias, importPath)
if strings.Contains(routesContent, "import (") {
routesContent = strings.Replace(routesContent, "import (",
"import (\n"+importToAdd, 1)
}
}
// Build route paths
var routesPath, singleRoutePath string
if data.Category != "" {
routesPath = data.Category + "/" + data.NamePlural
singleRoutePath = data.Category + "/" + data.NameLower
} else {
routesPath = data.NamePlural
singleRoutePath = data.NameLower
}
// routes
newRoutes := fmt.Sprintf("\t\t// %s endpoints\n", data.Name)
newRoutes += fmt.Sprintf("\t\t%sHandler := %s.New%sHandler()\n",
data.NameLower, importAlias, data.Name)
if data.HasGet {
newRoutes += fmt.Sprintf("\t\tv1.GET(\"/%s\", %sHandler.Get%s)\n",
routesPath, data.NameLower, data.Name)
newRoutes += fmt.Sprintf("\t\tv1.GET(\"/%s/:id\", %sHandler.Get%sByID)\n",
singleRoutePath, data.NameLower, data.Name)
}
if data.HasPost {
newRoutes += fmt.Sprintf("\t\tv1.POST(\"/%s\", %sHandler.Create%s)\n",
routesPath, data.NameLower, data.Name)
}
if data.HasPut {
newRoutes += fmt.Sprintf("\t\tv1.PUT(\"/%s/:id\", %sHandler.Update%s)\n",
singleRoutePath, data.NameLower, data.Name)
}
if data.HasDelete {
newRoutes += fmt.Sprintf("\t\tv1.DELETE(\"/%s/:id\", %sHandler.Delete%s)\n",
singleRoutePath, data.NameLower, data.Name)
}
if data.HasStats {
newRoutes += fmt.Sprintf("\t\tv1.GET(\"/%s/stats\", %sHandler.Get%sStats)\n",
routesPath, data.NameLower, data.Name)
}
newRoutes += "\n"
insertMarker := "\t\tprotected := v1.Group(\"/\")"
if strings.Contains(routesContent, insertMarker) {
if !strings.Contains(routesContent, fmt.Sprintf("New%sHandler", data.Name)) {
routesContent = strings.Replace(routesContent, insertMarker,
newRoutes+insertMarker, 1)
} else {
fmt.Printf("✅ Routes for %s already exist, skipping...\n", data.Name)
return
}
}
if err := os.WriteFile(routesFile, []byte(routesContent), 0644); err != nil {
fmt.Printf("Error writing routes.go: %v\n", err)
return
}
fmt.Printf("✅ Updated routes.go with %s endpoints\n", data.Name)
}
func printRoutesSample(data HandlerData) {
var routesPath, singleRoutePath string
if data.Category != "" {
routesPath = data.Category + "/" + data.NamePlural
singleRoutePath = data.Category + "/" + data.NameLower
} else {
routesPath = data.NamePlural
singleRoutePath = data.NameLower
}
var importAlias string
if data.Category != "" {
importAlias = data.NameLower + "Handlers"
} else {
importAlias = data.NameLower + "Handlers"
}
fmt.Printf(`
// %s endpoints
%sHandler := %s.New%sHandler()
`, data.Name, data.NameLower, importAlias, data.Name)
if data.HasGet {
fmt.Printf("\tv1.GET(\"/%s\", %sHandler.Get%s)\n", routesPath, data.NameLower, data.Name)
fmt.Printf("\tv1.GET(\"/%s/:id\", %sHandler.Get%sByID)\n", singleRoutePath, data.NameLower, data.Name)
}
if data.HasPost {
fmt.Printf("\tv1.POST(\"/%s\", %sHandler.Create%s)\n", routesPath, data.NameLower, data.Name)
}
if data.HasPut {
fmt.Printf("\tv1.PUT(\"/%s/:id\", %sHandler.Update%s)\n", singleRoutePath, data.NameLower, data.Name)
}
if data.HasDelete {
fmt.Printf("\tv1.DELETE(\"/%s/:id\", %sHandler.Delete%s)\n", singleRoutePath, data.NameLower, data.Name)
}
if data.HasStats {
fmt.Printf("\tv1.GET(\"/%s/stats\", %sHandler.Get%sStats)\n", routesPath, data.NameLower, data.Name)
}
fmt.Println()
}
// ================= UTILITY FUNCTIONS =====================
func writeFile(filename, content string) {
if err := os.WriteFile(filename, []byte(content), 0644); err != nil {
fmt.Printf("❌ Error creating file %s: %v\n", filename, err)
return
}
fmt.Printf("✅ Generated: %s\n", filename)
}