Add initial project structure with core functionality for book and stationery uploads
- Created main application entry point in `main.go`. - Added configuration management in `config/config.go` and tests in `config/config_test.go`. - Implemented handlers for book and stationery uploads in `handlers/book.go` and `handlers/stationery.go`, including validation logic. - Established database connection and services in `services/database.go` and `services/book_service.go`. - Defined models for books and stationery in `models/book.go` and `models/stationery.go`. - Set up Firebase integration for image uploads in `services/firebase.go`. - Created migration scripts for database schema in `migrations/001_create_tables.sql` and subsequent updates. - Added CORS and error handling middleware. - Included comprehensive tests for handlers, services, and utilities. - Documented API endpoints and usage in `README.md` and migration instructions in `migrations/README.md`. - Introduced `.gitignore` to exclude unnecessary files and directories. - Added Go module support with `go.mod` and `go.sum` files. - Implemented utility functions for slug generation and validation in `utils/slug.go` and `utils/validation.go`.
This commit is contained in:
ianshaloom
182
utils/validation.go
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182
utils/validation.go
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package utils
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// ValidationError represents a validation error with field name
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type ValidationError struct {
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Field string
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Message string
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}
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func (e *ValidationError) Error() string {
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return fmt.Sprintf("%s: %s", e.Field, e.Message)
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}
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// ValidateBookFields validates all book form fields
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func ValidateBookFields(bookName, cost, price, discount, quantity, publisherAuthor, category, description string) []*ValidationError {
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var errors []*ValidationError
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// Book Name
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bookName = strings.TrimSpace(bookName)
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if bookName == "" {
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errors = append(errors, &ValidationError{Field: "book_name", Message: "is required"})
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} else if len(bookName) > 200 {
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errors = append(errors, &ValidationError{Field: "book_name", Message: "exceeds 200 characters"})
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}
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// Cost
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if cost == "" {
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errors = append(errors, &ValidationError{Field: "cost", Message: "is required"})
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} else {
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costVal, err := strconv.ParseFloat(cost, 64)
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if err != nil || costVal <= 0 {
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errors = append(errors, &ValidationError{Field: "cost", Message: "must be a positive number"})
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}
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}
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// Price
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if price == "" {
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errors = append(errors, &ValidationError{Field: "price", Message: "is required"})
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} else {
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priceVal, err := strconv.ParseFloat(price, 64)
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if err != nil || priceVal <= 0 {
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errors = append(errors, &ValidationError{Field: "price", Message: "must be a positive number"})
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}
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}
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// Discount (optional)
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if discount != "" {
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discountVal, err := strconv.ParseFloat(discount, 64)
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if err != nil || discountVal < 0 {
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errors = append(errors, &ValidationError{Field: "discount", Message: "must be a non-negative number"})
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}
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}
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// Quantity
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if quantity == "" {
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errors = append(errors, &ValidationError{Field: "quantity", Message: "is required"})
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} else {
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quantityVal, err := strconv.Atoi(quantity)
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if err != nil || quantityVal <= 0 {
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errors = append(errors, &ValidationError{Field: "quantity", Message: "must be a positive integer"})
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}
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}
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// Publisher/Author
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publisherAuthor = strings.TrimSpace(publisherAuthor)
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if publisherAuthor == "" {
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errors = append(errors, &ValidationError{Field: "publisher_author", Message: "is required"})
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} else if len(publisherAuthor) > 200 {
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errors = append(errors, &ValidationError{Field: "publisher_author", Message: "exceeds 200 characters"})
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}
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// Category
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category = strings.TrimSpace(category)
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if category == "" {
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errors = append(errors, &ValidationError{Field: "category", Message: "is required"})
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} else if len(category) > 100 {
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errors = append(errors, &ValidationError{Field: "category", Message: "exceeds 100 characters"})
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}
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// Description (optional)
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if description != "" && len(description) > 1000 {
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errors = append(errors, &ValidationError{Field: "description", Message: "exceeds 1000 characters"})
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}
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return errors
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}
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// ValidateStationeryFields validates all stationery form fields
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func ValidateStationeryFields(stationeryName, cost, price, discount, quantity, category, description string) []*ValidationError {
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var errors []*ValidationError
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// Stationery Name
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stationeryName = strings.TrimSpace(stationeryName)
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if stationeryName == "" {
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errors = append(errors, &ValidationError{Field: "stationery_name", Message: "is required"})
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} else if len(stationeryName) > 200 {
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errors = append(errors, &ValidationError{Field: "stationery_name", Message: "exceeds 200 characters"})
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}
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// Cost
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if cost == "" {
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errors = append(errors, &ValidationError{Field: "cost", Message: "is required"})
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} else {
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costVal, err := strconv.ParseFloat(cost, 64)
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if err != nil || costVal <= 0 {
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errors = append(errors, &ValidationError{Field: "cost", Message: "must be a positive number"})
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}
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}
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// Price
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if price == "" {
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errors = append(errors, &ValidationError{Field: "price", Message: "is required"})
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} else {
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priceVal, err := strconv.ParseFloat(price, 64)
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if err != nil || priceVal <= 0 {
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errors = append(errors, &ValidationError{Field: "price", Message: "must be a positive number"})
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}
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}
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// Discount (optional)
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if discount != "" {
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discountVal, err := strconv.ParseFloat(discount, 64)
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if err != nil || discountVal < 0 {
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errors = append(errors, &ValidationError{Field: "discount", Message: "must be a non-negative number"})
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}
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}
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// Quantity
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if quantity == "" {
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errors = append(errors, &ValidationError{Field: "quantity", Message: "is required"})
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} else {
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quantityVal, err := strconv.Atoi(quantity)
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if err != nil || quantityVal <= 0 {
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errors = append(errors, &ValidationError{Field: "quantity", Message: "must be a positive integer"})
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}
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}
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// Category
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category = strings.TrimSpace(category)
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if category == "" {
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errors = append(errors, &ValidationError{Field: "category", Message: "is required"})
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} else if len(category) > 100 {
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errors = append(errors, &ValidationError{Field: "category", Message: "exceeds 100 characters"})
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}
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// Description (optional)
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if description != "" && len(description) > 1000 {
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errors = append(errors, &ValidationError{Field: "description", Message: "exceeds 1000 characters"})
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}
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return errors
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}
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// ValidateFileType checks if file type is allowed
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func ValidateFileType(contentType string) error {
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allowedTypes := map[string]bool{
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"image/png": true,
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"image/jpeg": true,
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"image/jpg": true,
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"image/webp": true,
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}
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if !allowedTypes[contentType] {
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return fmt.Errorf("invalid file type. Only PNG, JPEG, and WEBP are allowed")
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}
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return nil
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}
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// ValidateFileSize checks if file size is within limit
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func ValidateFileSize(size, maxSize int64) error {
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if size > maxSize {
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return fmt.Errorf("file size exceeds %dMB limit", maxSize/(1024*1024))
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}
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return nil
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}
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