write util for parse p2go service

utils/parser.go

@@ -0,0 +1,141 @@
+// !!!ВНИМАНИЕ!!!
+// Прошу не запускать часто,
+// чтобы не достовлять неудобств сервису
+
+package main
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"os"
+	"strings"
+	"sync"
+	"time"
+)
+
+const (
+	TIMEOUT    int    = 5
+	BASE_URL   string = "https://play2go.cloud"
+	SLEEP      int    = 5
+	OUT_FOLDER string = "./"
+)
+
+type JSON string
+
+type LinkForParse struct {
+	Url    string
+	Method string
+}
+
+func (l LinkForParse) String() string {
+	return fmt.Sprintf("%s %s", strings.ToUpper(l.Method), l.Url)
+}
+
+var parse_links = []LinkForParse{
+	{"/api/users/me", http.MethodGet},
+}
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	var wg sync.WaitGroup
+
+	token := os.Getenv("ACCESS_TOKEN")
+	resultChan := make(chan JSON, 1)
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		defer close(resultChan)
+		parseProccess(ctx, token, TIMEOUT, parse_links, SLEEP, resultChan)
+	}()
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for result := range resultChan {
+			slog.Debug("parsed", "data", result)
+		}
+	}()
+
+	wg.Wait()
+	slog.Info("All proccessed finished successfully")
+}
+
+func parseProccess(ctx context.Context, token string, timeout int, links []LinkForParse, sleep int, result chan<- JSON) {
+	if ctx.Err() != nil {
+		slog.WarnContext(ctx, "parsing stopped")
+	}
+
+	for i, link := range parse_links {
+		parsed, err := parse(ctx, link, token, timeout, nil)
+		if err != nil {
+			slog.ErrorContext(ctx, "failed to parse", "link", link.String(), "error", err.Error())
+			continue
+		}
+
+		select {
+		case result <- parsed:
+		case <-ctx.Done():
+			slog.WarnContext(ctx, "failed to send result: context canceled")
+			return
+		}
+
+		if sleep > 0 && i < len(links)-1 {
+			select {
+			case <-time.After(time.Duration(timeout) * time.Second):
+			case <-ctx.Done():
+				slog.WarnContext(ctx, "sleep interuppted by context cancellation")
+				return
+			}
+		}
+	}
+}
+
+func parse(ctx context.Context, link LinkForParse, token string, timeout int, data any) (JSON, error) {
+	var reader io.Reader
+	tctx, cancel := context.WithTimeout(ctx, time.Duration(timeout)*time.Second)
+	defer cancel()
+
+	if data != nil {
+		d, err := json.Marshal(reader)
+		if err != nil {
+			return "", fmt.Errorf("failed to encode: %w", err)
+		}
+		reader = bytes.NewReader(d)
+	}
+
+	fullUrl := BASE_URL + link.Url
+	req, err := http.NewRequestWithContext(tctx, link.Method, fullUrl, reader)
+	if err != nil {
+		return "", fmt.Errorf("failed to create request: %w", err)
+	}
+	req.Header.Set("Authorization", fmt.Sprintf("Brarer %s", token))
+	req.Header.Set("Accept", "application/json")
+	if reader != nil {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("failed to send request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return "", fmt.Errorf("http error: %v", resp.StatusCode)
+	}
+
+	bodyData, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", fmt.Errorf("failed to read body: %w", err)
+	}
+
+	return JSON(bodyData), nil
+}