refactor: split processor package into smaller files

internal/reader/processor/youtube.go

@@ -0,0 +1,100 @@
+// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package processor
+
+import (
+	"errors"
+	"fmt"
+	"log/slog"
+	"regexp"
+	"strconv"
+	"time"
+
+	"github.com/PuerkitoBio/goquery"
+
+	"miniflux.app/v2/internal/config"
+	"miniflux.app/v2/internal/model"
+	"miniflux.app/v2/internal/reader/fetcher"
+)
+
+var (
+	youtubeRegex = regexp.MustCompile(`youtube\.com/watch\?v=(.*)$`)
+	iso8601Regex = regexp.MustCompile(`^P((?P<year>\d+)Y)?((?P<month>\d+)M)?((?P<week>\d+)W)?((?P<day>\d+)D)?(T((?P<hour>\d+)H)?((?P<minute>\d+)M)?((?P<second>\d+)S)?)?$`)
+)
+
+func shouldFetchYouTubeWatchTime(entry *model.Entry) bool {
+	if !config.Opts.FetchYouTubeWatchTime() {
+		return false
+	}
+	matches := youtubeRegex.FindStringSubmatch(entry.URL)
+	urlMatchesYouTubePattern := len(matches) == 2
+	return urlMatchesYouTubePattern
+}
+
+func fetchYouTubeWatchTime(websiteURL string) (int, error) {
+	requestBuilder := fetcher.NewRequestBuilder()
+	requestBuilder.WithTimeout(config.Opts.HTTPClientTimeout())
+	requestBuilder.WithProxy(config.Opts.HTTPClientProxy())
+
+	responseHandler := fetcher.NewResponseHandler(requestBuilder.ExecuteRequest(websiteURL))
+	defer responseHandler.Close()
+
+	if localizedError := responseHandler.LocalizedError(); localizedError != nil {
+		slog.Warn("Unable to fetch YouTube page", slog.String("website_url", websiteURL), slog.Any("error", localizedError.Error()))
+		return 0, localizedError.Error()
+	}
+
+	doc, docErr := goquery.NewDocumentFromReader(responseHandler.Body(config.Opts.HTTPClientMaxBodySize()))
+	if docErr != nil {
+		return 0, docErr
+	}
+
+	durs, exists := doc.Find(`meta[itemprop="duration"]`).First().Attr("content")
+	if !exists {
+		return 0, errors.New("duration has not found")
+	}
+
+	dur, err := parseISO8601(durs)
+	if err != nil {
+		return 0, fmt.Errorf("unable to parse duration %s: %v", durs, err)
+	}
+
+	return int(dur.Minutes()), nil
+}
+
+func parseISO8601(from string) (time.Duration, error) {
+	var match []string
+	var d time.Duration
+
+	if iso8601Regex.MatchString(from) {
+		match = iso8601Regex.FindStringSubmatch(from)
+	} else {
+		return 0, errors.New("could not parse duration string")
+	}
+
+	for i, name := range iso8601Regex.SubexpNames() {
+		part := match[i]
+		if i == 0 || name == "" || part == "" {
+			continue
+		}
+
+		val, err := strconv.ParseInt(part, 10, 64)
+		if err != nil {
+			return 0, err
+		}
+
+		switch name {
+		case "hour":
+			d += (time.Duration(val) * time.Hour)
+		case "minute":
+			d += (time.Duration(val) * time.Minute)
+		case "second":
+			d += (time.Duration(val) * time.Second)
+		default:
+			return 0, fmt.Errorf("unknown field %s", name)
+		}
+	}
+
+	return d, nil
+}