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helpers.go
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helpers.go
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package main
import (
"encoding/json"
"fmt"
"io"
"os"
"strings"
)
// general functions
func usage() {
fmt.Println("Usage: goJSON2CLASS -l <target-lang> -s <schema.json> -o <output.ext>")
fmt.Println()
fmt.Println("\t-l >> choose a language.")
fmt.Println("\t\tExample: `-l rust` (default: nil)")
fmt.Println()
fmt.Println("\t-s >> path to file containing JSON schema. (default: schema.json)")
fmt.Println("\t\tExample: `-s schema.json`")
fmt.Println()
fmt.Println("\t-o >> path to output file with extension. (default: output.txt)")
fmt.Println("\t\tExample: `-o output.rs`")
fmt.Println()
fmt.Println("\t-p >> define public if supported by language (default: false)")
fmt.Println("\t\tExample: `-p`")
}
func readJSONSchema(filePath string) (*Schema, error) {
file, err := os.Open(filePath)
if err != nil {
return nil, fmt.Errorf("failed to open file: %w", err)
}
defer file.Close()
data, err := io.ReadAll(file)
if err != nil {
return nil, fmt.Errorf("failed to read file: %w", err)
}
var schema Schema
err = json.Unmarshal(data, &schema)
if err != nil {
return nil, fmt.Errorf("failed to parse JSON schema: %w", err)
}
return &schema, nil
}
func writeCodeToFile(outFile string, generateCode string) {
err := os.WriteFile(outFile, []byte(generateCode), 0644)
if err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
fmt.Println("Done!")
}
func checkPublicSupport(inp string) bool {
supportedLanguages := map[string]bool{
"rust": true,
// TODO: Implement public definitions of these langs
// "java": true,
// "go": true,
// "cpp": true,
}
return supportedLanguages[inp]
}
func getFirstWordFromTitle(title string) string {
titleWords := strings.Split(title, " ")
return titleWords[0]
}
// functions for C handler
func cHeaderFormat() string {
return getCHeaderIncludes() + "\n" +
getPreprocessorDirectives() + "\n" +
getTypedefStructsList() + "\n"
}
func getPreprocessorDirectives() string {
var builder strings.Builder
definesMap := getPreprocessorSizeDefinesMap()
for define, value := range definesMap {
builder.WriteString(fmt.Sprintf("#define %s %d\n", define, value))
}
return builder.String()
}
func getTypedefStructsList() string {
var typedefStructBuilder strings.Builder
for _, structName := range typedefStructsList {
typedefStructBuilder.WriteString("typedef struct " + structName + " " + structName + ";\n")
}
return typedefStructBuilder.String()
}
func isArrayType(property interface{}) bool {
switch p := property.(type) {
case map[string]interface{}:
if _, ok := p["type"]; ok {
return p["type"] == "array"
}
}
return false
}
func isObjectType(property interface{}) bool {
switch p := property.(type) {
case map[string]interface{}:
if _, ok := p["type"]; ok {
return p["type"] == "object"
}
}
return false
}
func getArrayType(property interface{}) string {
switch p := property.(type) {
case map[string]interface{}:
if items, ok := p["items"]; ok {
return getCDataType(items)
}
}
return "unknown"
}
func addToDefinesMap(structName string, propertyName string, value int) string {
hashDefineMacro := fmt.Sprintf("%s_%s_SIZE", strings.ToUpper(structName), strings.ToUpper(propertyName))
preprocessorSizeDefinesMap[hashDefineMacro] = value
return hashDefineMacro
}
func getPreprocessorSizeDefinesMap() map[string]int {
return preprocessorSizeDefinesMap
}
func getCHeaderIncludes() string {
return `#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
`
}
// functions for CPP handler
func getCPPHeaderIncludes() string {
return `#include <iostream>
#include <vector>
#include <string>`
}
func isCPPArrayType(property interface{}) bool {
if p, ok := property.(map[string]interface{}); ok {
if _, ok := p["type"]; ok {
return p["type"] == "array"
}
}
return false
}
func isCPPObjectType(property interface{}) bool {
if p, ok := property.(map[string]interface{}); ok {
if _, ok := p["type"]; ok {
return p["type"] == "object"
}
}
return false
}
func getCPPArrayType(property interface{}) string {
if p, ok := property.(map[string]interface{}); ok {
if items, ok := p["items"]; ok {
return getItemCPPType(items)
}
}
return "unknown"
}
// used in c, cpp and java handler
func addToTypedefStructsList(structName string) {
typedefStructsList = append(typedefStructsList, structName)
}
// function for rust handler
func getPropertyDeclaration(name, typ string, pubFlag bool) string {
if pubFlag {
return "pub " + name + ": " + typ
}
return name + ": " + typ
}
// functions for java handler
func isJavaArrayType(property interface{}) bool {
switch p := property.(type) {
case map[string]interface{}:
if _, ok := p["type"]; ok {
return p["type"] == "array"
}
}
return false
}
func isJavaObjectType(property interface{}) bool {
switch p := property.(type) {
case map[string]interface{}:
if _, ok := p["type"]; ok {
return p["type"] == "object"
}
}
return false
}
func getJavaArrayType(property interface{}) string {
switch p := property.(type) {
case map[string]interface{}:
if items, ok := p["items"]; ok {
return getItemJavaType(items)
}
}
return "unknown"
}