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main.go
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main.go
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package main
import (
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"time"
"github.com/amarnathcjd/gogram/internal/cmd/tlgen/gen"
"github.com/amarnathcjd/gogram/internal/cmd/tlgen/tlparser"
)
const (
tlLOC = "../../../schemes/api.tl"
desLOC = "../../../telegram/"
)
var (
API_SOURCES = []string{"https://raw.githubusercontent.com/null-nick/TL-Schema/main/api.tl",
"https://raw.githubusercontent.com/telegramdesktop/tdesktop/dev/Telegram/SourceFiles/mtproto/scheme/api.tl",
}
)
const helpMsg = `welcome to gogram's TL generator (c) @amarnathcjd`
func main() {
if len(os.Args) == 0 || len(os.Args) == 1 {
currentLocalAPIVersionFile := filepath.Join(desLOC, "const.go")
currentLocalAPIVersion, err := os.ReadFile(currentLocalAPIVersionFile)
if err != nil {
panic(err)
}
reg := regexp.MustCompile(`ApiVersion = \d+`)
str := string(currentLocalAPIVersion)
llayer := reg.FindString(str)
llayer = strings.TrimPrefix(llayer, "ApiVersion = ")
remoteAPIVersion, rlayer, err := getSourceLAYER(llayer)
if err != nil {
fmt.Println(err)
return
}
if !strings.EqualFold(llayer, rlayer) {
fmt.Println("Local API version is", llayer, "and remote API version is", rlayer)
fmt.Println("Performing update")
remoteAPIVersion = cleanComments(remoteAPIVersion)
file, err := os.OpenFile(tlLOC, os.O_RDWR|os.O_CREATE, 0644)
if err != nil {
panic(err)
}
file.Truncate(0)
file.Seek(0, 0)
file.WriteString(string(remoteAPIVersion))
if err := root(tlLOC, desLOC); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err)
} else {
fmt.Println("Update completed - Generated code in", desLOC)
}
} else {
fmt.Println("Local API version is", llayer, "and remote API version is", rlayer)
fmt.Println("No update required")
}
return
}
if len(os.Args) != 3 {
fmt.Print(helpMsg)
return
}
if err := root(os.Args[1], os.Args[2]); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err)
os.Exit(1)
}
}
func getSourceLAYER(llayer string) ([]byte, string, error) {
reg := regexp.MustCompile(`// LAYER \d+`)
for _, source := range API_SOURCES {
src, err := http.Get(source)
if err != nil {
return nil, "", err
}
remoteAPIVersion, err := io.ReadAll(src.Body)
if err != nil {
return nil, "", err
}
rlayer := reg.FindString(string(remoteAPIVersion))
rlayer = strings.TrimPrefix(rlayer, "// LAYER ")
if !strings.EqualFold(llayer, rlayer) {
rlayer_int, err := strconv.Atoi(rlayer)
if err != nil {
return nil, "", err
}
llayer_int, err := strconv.Atoi(llayer)
if err != nil {
return nil, "", err
}
if rlayer_int > llayer_int {
return remoteAPIVersion, rlayer, nil
}
} else {
fmt.Println("Skipping (<=) ~ Source [", source, "] ("+rlayer+")")
continue
}
return remoteAPIVersion, rlayer, fmt.Errorf("No update required (Local API version is %s and remote API (TDesktop) version is %s)", llayer, rlayer)
}
return nil, "", fmt.Errorf("No update required ~")
}
func root(tlfile, outdir string) error {
startTime := time.Now()
b, err := os.ReadFile(tlfile)
if err != nil {
return fmt.Errorf("read schema file: %w", err)
}
schema, err := tlparser.ParseSchema(string(b))
if err != nil {
return fmt.Errorf("parse schema file: %w", err)
}
g, err := gen.NewGenerator(schema, "(c) @amarnathcjd", outdir)
if err != nil {
return err
}
err = g.Generate()
if err != nil {
return fmt.Errorf("generate code: %w", err)
}
fmt.Println("Generated code in", outdir, "in", time.Since(startTime))
minorFixes(outdir, getAPILayerFromFile(tlfile))
return nil
}
func getAPILayerFromFile(tlfile string) string {
b, err := os.ReadFile(tlfile)
if err != nil {
return "0"
}
// last line:: // LAYER 176
lines := strings.Split(string(b), "\n")
if len(lines) < 2 {
return "0"
}
lastLine := lines[len(lines)-2]
if !strings.HasPrefix(lastLine, "// LAYER") {
return strings.TrimSpace(strings.TrimPrefix(lines[len(lines)-1], "// LAYER"))
}
return strings.TrimSpace(strings.TrimPrefix(lastLine, "// LAYER"))
}
func minorFixes(outdir string, layer string) {
execWorkDir, err := os.Getwd()
if err != nil {
panic(err)
}
execWorkDir = filepath.Join(execWorkDir, outdir)
fmt.Println("Applying minor fixes to generated code in", execWorkDir)
replace(filepath.Join(execWorkDir, "methods_gen.go"), "return bool", "return false")
replace(filepath.Join(execWorkDir, "methods_gen.go"), `if err != nil {
return nil, errors.Wrap(err, "sending UsersGetUsers")
}
resp, ok := responseData.([]User)
if !ok {
panic("got invalid response type: " + reflect.TypeOf(responseData).String())
}`, `if err != nil {
return nil, errors.Wrap(err, "sending UsersGetUsers")
}
resp, ok := responseData.([]User)
if !ok {
if _, ok := responseData.([]*UserObj); ok { // Temp Fix till Problem is Identified
var users []User = make([]User, len(responseData.([]*UserObj)))
for i, user := range responseData.([]*UserObj) {
users[i] = user
}
return users, nil
}
panic("got invalid response type: " + reflect.TypeOf(responseData).String())
}`)
replace(filepath.Join(execWorkDir, "methods_gen.go"), `errors []SecureValueError`, `errorsw []SecureValueError`)
replace(filepath.Join(execWorkDir, "methods_gen.go"), `responseData, err := c.MakeRequest(&UsersSetSecureValueErrorsParams{
Errors: errors,
ID: id,
})`, `responseData, err := c.MakeRequest(&UsersSetSecureValueErrorsParams{
Errors: errorsw,
ID: id,
})`)
replace(filepath.Join(execWorkDir, "enums_gen.go"), `Null Null`, `NullCrc Null`)
replace(filepath.Join(execWorkDir, "init_gen.go"), `Null,`, `NullCrc,`)
if layer != "0" {
// replace ApiVersion = 174
file, err := os.OpenFile(filepath.Join(execWorkDir, "const.go"), os.O_RDWR|os.O_CREATE, 0644)
if err != nil {
panic(err)
}
content, err := io.ReadAll(file)
if err != nil {
panic(err)
}
reg := regexp.MustCompile(`ApiVersion = \d+`)
str := string(content)
str = reg.ReplaceAllString(str, "ApiVersion = "+layer)
fmt.Println("Updated ApiVersion to", layer)
file.Truncate(0)
file.Seek(0, 0)
_, err = file.Write([]byte(str))
if err != nil {
panic(err)
}
// ALSO UPDATE README.md
rdfile, err := os.OpenFile(filepath.Join(execWorkDir, "../README.md"), os.O_RDWR|os.O_CREATE, 0644)
if err != nil {
panic(err)
}
rdcontent, err := io.ReadAll(rdfile)
if err != nil {
panic(err)
}
// #### Current Layer - **174** (Updated on 2024-02-18)
reg = regexp.MustCompile(`#### Current Layer - \*\*\d+\*\* \(Updated on \d{4}-\d{2}-\d{2}\)`)
str = string(rdcontent)
str = reg.ReplaceAllString(str, "#### Current Layer - **"+layer+"** (Updated on "+time.Now().Format("2006-01-02")+")")
fmt.Println("Updated README.md with ApiVersion", layer)
rdfile.Truncate(0)
rdfile.Seek(0, 0)
rdfile.Write([]byte(str))
}
}
func replace(filename, old, new string) {
f, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, 0644)
if err != nil {
panic(err)
}
content, err := io.ReadAll(f)
if err != nil {
panic(err)
}
//fmt.Println("Replacing", old, "with", new, "in", filename)
str := string(content)
str = strings.Replace(str, old, new, -1)
// truncate the file before writing
err = f.Truncate(0)
if err != nil {
panic(err)
}
_, err = f.Seek(0, 0)
if err != nil {
panic(err)
}
_, err = f.Write([]byte(str))
if err != nil {
panic(err)
}
}
func cleanComments(b []byte) []byte {
lines := strings.Split(string(b), "\n")
var clean []string
var parsedManually bool
for _, line := range lines {
if strings.HasPrefix(line, "//") && !strings.Contains(line, "////") {
if strings.Contains(line, "Not used") || strings.Contains(line, "Parsed manually") || strings.Contains(line, "https://") {
if strings.Contains(line, "Parsed manually") {
parsedManually = true
}
continue
}
} else if strings.Contains(line, "////") || strings.Contains(line, "{X:Type}") {
continue
}
clean = append(clean, line)
}
// replace consecutive 2+ newlines with single newline
b = []byte(strings.Join(clean, "\n"))
lines = strings.Split(string(b), "\n")
clean = []string{}
for i := 0; i < len(lines); i++ {
if i+1 < len(lines) && len(lines[i]) == 0 && len(lines[i+1]) == 0 {
continue
}
clean = append(clean, lines[i])
}
b = []byte(strings.Join(clean, "\n"))
// add some bytes to its start
if parsedManually {
clean = []string{`boolFalse#bc799737 = Bool;
boolTrue#997275b5 = Bool;
true#3fedd339 = True;
vector#1cb5c415 {t:Type} # [ t ] = Vector t;
error#c4b9f9bb code:int text:string = Error;
null#56730bcc = Null;`}
} else {
clean = []string{}
}
clean = append(clean, string(b))
return []byte(strings.Join(clean, "\n"))
}