Initial commit

2026-03-14 22:51:43 +03:00
commit 0a73bca056
105 changed files with 24685 additions and 0 deletions
--- a/internal/holy/celebratoday.go
+++ b/internal/holy/celebratoday.go
@@ -0,0 +1,110 @@
+// Package holy implements main business logic of bot service.
+package holy
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"slices"
+	"strings"
+	"time"
+
+	"github.com/carlmjohnson/requests"
+	"golang.org/x/net/html"
+)
+
+// APIClient клиент сервиса https://celebratoday.com/.
+func APIClient() (string, error) {
+	var (
+		ctx      = context.Background()
+		url      = "https://celebratoday.com/ru/today"
+		respBody string
+	)
+
+	// Формальная попытка притвориться браузером.
+	_, _, day := time.Now().Date()
+	userAgent := Config.UserAgents[day]
+
+	if err := requests.URL(url).UserAgent(userAgent).
+		Header("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8").
+		Header("Accept-Language", "en-US,en;q=0.5").
+		Header("User-Agent", "ru-RU").
+		Header("Accept-Charset", "utf-8").ToString(&respBody).Fetch(ctx); err != nil {
+		return "", fmt.Errorf("Unable to GET %s: %w", url, err) //nolint: staticcheck // Looks like golangci-lint ignoring settings about fucking ST1005 check. We want readable errors despite what wants author of linter or assholes from go dev team.
+	}
+
+	holidays, err := parser(respBody)
+
+	if err != nil {
+		return "", fmt.Errorf("Unable to parse response from celebratoday.com: %w", err) //nolint: staticcheck // Looks like golangci-lint ignoring settings about fucking ST1005 check. We want readable errors despite what wants author of linter or assholes from go dev team.
+	}
+
+	if len(holidays) == 0 {
+		return "", errors.New("Unable to parse response from celebratoday.com: no holidays found") //nolint: staticcheck // Looks like golangci-lint ignoring settings about fucking ST1005 check. We want readable errors despite what wants author of linter or assholes from go dev team.
+	}
+
+	slices.Sort(holidays)
+
+	holidays = slices.Compact(holidays)
+
+	return "* " + strings.Join(holidays, "\n* "), nil
+}
+
+// parser разбирает буфер с html-ем, выискивая праздники.
+func parser(data string) ([]string, error) {
+	var (
+		holidays = make([]string, 0, 1)
+		err      error
+		s        = make([]Holy, 0, 1)
+	)
+
+	doc, err := html.Parse(strings.NewReader(data))
+
+	if err != nil {
+		return holidays, err
+	}
+
+	traverse(doc, &s)
+
+	// А теперь пробежимся по полученной структуре и вытянем из неё все строки с праздниками.
+	for _, ass := range s {
+		for _, entity := range ass.MainEntity {
+			for _, sugestedAnswer := range entity.SuggestedAnswer {
+				holidays = append(holidays, sugestedAnswer.Text)
+			}
+		}
+	}
+
+	return holidays, err
+}
+
+// traverse рекурсивная функция, ищущая <script type="application/ld+json"> в структуре документа. Там внутри будет json
+// со списком праздников и это и есть цель нашего поиска.
+func traverse(n *html.Node, h *[]Holy) {
+	// Если найденный элемент в поле Data содержит script (то есть это тэг <script>).
+	if n.Type == html.ElementNode && n.Data == "script" {
+		// Ищем атрибут type со значением application/ld+json.
+		for _, attr := range n.Attr {
+			if attr.Key == "type" && attr.Val == "application/ld+json" {
+				for c := n.FirstChild; c != nil; c = c.NextSibling {
+					if c.Type == html.TextNode {
+						// Добавлять рановато, надо вначале попробовать распарсить этот json
+						// используя целевую структуру.
+						var holiday Holy
+
+						if err := json.Unmarshal([]byte(c.Data), &holiday); err == nil {
+							*h = append(*h, holiday)
+						}
+					}
+				}
+			}
+		}
+	}
+
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		traverse(c, h)
+	}
+}
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */