127 lines
2.8 KiB
Go
127 lines
2.8 KiB
Go
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//go:generate go run generate_handlers.go
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package main
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import (
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"fmt"
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"io/ioutil"
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"os"
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"regexp"
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"strings"
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"text/template"
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)
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// EnumType defines the type of the protobuf enum
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type EnumType struct {
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Name string
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Values []string
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}
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// MethodInfo holds information about a method
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type MethodInfo struct {
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ProtobufName string
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MethodName string
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EnumValue string
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ProcessRaw bool
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SyncMessage bool
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}
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func main() {
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inputFile := "../../protocol/protobuf/application_metadata_message.proto"
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outputFile := "../../protocol/messenger_handlers.go"
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templateFile := "./generate_handlers_template.txt"
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enumName := "Type"
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// Load the protobuf file
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content, err := ioutil.ReadFile(inputFile)
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if err != nil {
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fmt.Println("Error:", err)
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os.Exit(1)
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}
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templateFileContent, err := os.ReadFile(templateFile)
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if err != nil {
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fmt.Println("Failed to read template:", err)
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os.Exit(1)
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}
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// Extract enum values
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enum := extractEnum(content, enumName)
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// Prepare method information
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var methodInfos []MethodInfo
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for _, value := range enum.Values {
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protobufName := toCamelCase(value)
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if protobufName == "Unknown" || strings.HasPrefix(value, "DEPRECATED") {
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continue
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}
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methodName := "handle" + protobufName + "Protobuf"
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info := MethodInfo{MethodName: methodName, ProtobufName: protobufName, EnumValue: value}
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if strings.HasPrefix(value, "SYNC_") {
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info.SyncMessage = true
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}
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if protobufName == "PushNotificationRegistration" {
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info.ProcessRaw = true
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}
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methodInfos = append(methodInfos, info)
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}
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// Generate code
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templateCode := string(templateFileContent)
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tmpl, err := template.New("handlers").Parse(templateCode)
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if err != nil {
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fmt.Println("Error:", err)
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os.Exit(1)
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}
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output, err := os.Create(outputFile)
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if err != nil {
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fmt.Println("Error:", err)
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os.Exit(1)
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}
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defer output.Close()
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err = tmpl.Execute(output, methodInfos)
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if err != nil {
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fmt.Println("Error:", err)
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os.Exit(1)
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}
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fmt.Printf("Generated handlers in %s for %s enum.\n", outputFile, enumName)
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}
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func extractEnum(content []byte, enumName string) EnumType {
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enumPattern := fmt.Sprintf(`enum\s+%s\s*{([^}]+)}`, enumName)
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re := regexp.MustCompile(enumPattern)
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match := re.FindStringSubmatch(string(content))
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if len(match) != 2 {
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fmt.Println("Enum not found")
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os.Exit(1)
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}
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valuesPattern := `(?m)^\s*([A-Z_0-9]+)\s*=\s*\d+;`
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re = regexp.MustCompile(valuesPattern)
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valueMatches := re.FindAllStringSubmatch(match[1], -1)
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values := make([]string, len(valueMatches))
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for i, match := range valueMatches {
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values[i] = strings.TrimSpace(match[1])
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}
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return EnumType{Name: enumName, Values: values}
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}
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func toCamelCase(s string) string {
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words := strings.Split(strings.ToLower(s), "_")
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for i, word := range words {
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words[i] = strings.Title(word)
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}
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return strings.Join(words, "")
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}
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