go-tdlib/codegen/function.go

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package codegen
import (
"bytes"
"fmt"
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"git.zio.sh/astra/go-tdlib/tlparser"
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)
func GenerateFunctions(schema *tlparser.Schema, packageName string) []byte {
buf := bytes.NewBufferString("")
buf.WriteString(fmt.Sprintf("%s\n\npackage %s\n\n", header, packageName))
buf.WriteString(`import (
"errors"
)`)
buf.WriteString("\n")
for _, function := range schema.Functions {
tdlibFunction := TdlibFunction(function.Name, schema)
tdlibFunctionReturn := TdlibFunctionReturn(function.Class, schema)
if len(function.Properties) > 0 {
buf.WriteString("\n")
buf.WriteString(fmt.Sprintf("type %sRequest struct { \n", tdlibFunction.ToGoName()))
for _, property := range function.Properties {
tdlibTypeProperty := TdlibTypeProperty(property.Name, property.Type, schema)
buf.WriteString(fmt.Sprintf(" // %s\n", property.Description))
buf.WriteString(fmt.Sprintf(" %s %s `json:\"%s\"`\n", tdlibTypeProperty.ToGoName(), tdlibTypeProperty.ToGoType(), property.Name))
}
buf.WriteString("}\n")
}
buf.WriteString("\n")
buf.WriteString("// " + function.Description)
buf.WriteString("\n")
requestArgument := ""
if len(function.Properties) > 0 {
requestArgument = fmt.Sprintf("req *%sRequest", tdlibFunction.ToGoName())
}
buf.WriteString(fmt.Sprintf("func (client *Client) %s(%s) (%s, error) {\n", tdlibFunction.ToGoName(), requestArgument, tdlibFunctionReturn.ToGoReturn()))
sendMethod := "Send"
if function.IsSynchronous {
sendMethod = "jsonClient.Execute"
}
if len(function.Properties) > 0 {
buf.WriteString(fmt.Sprintf(` result, err := client.%s(Request{
meta: meta{
Type: "%s",
},
Data: map[string]interface{}{
`, sendMethod, function.Name))
for _, property := range function.Properties {
tdlibTypeProperty := TdlibTypeProperty(property.Name, property.Type, schema)
buf.WriteString(fmt.Sprintf(" \"%s\": req.%s,\n", property.Name, tdlibTypeProperty.ToGoName()))
}
buf.WriteString(` },
})
`)
} else {
buf.WriteString(fmt.Sprintf(` result, err := client.%s(Request{
meta: meta{
Type: "%s",
},
Data: map[string]interface{}{},
})
`, sendMethod, function.Name))
}
buf.WriteString(` if err != nil {
return nil, err
}
if result.Type == "error" {
return nil, buildResponseError(result.Data)
}
`)
if tdlibFunctionReturn.IsClass() {
buf.WriteString(" switch result.Type {\n")
for _, subType := range tdlibFunctionReturn.GetClass().GetSubTypes() {
buf.WriteString(fmt.Sprintf(` case %s:
return Unmarshal%s(result.Data)
`, subType.ToTypeConst(), subType.ToGoType()))
}
buf.WriteString(` default:
return nil, errors.New("invalid type")
`)
buf.WriteString(" }\n")
} else {
buf.WriteString(fmt.Sprintf(` return Unmarshal%s(result.Data)
`, tdlibFunctionReturn.ToGoType()))
}
buf.WriteString("}\n")
}
return buf.Bytes()
}