mirror of https://github.com/miniflux/v2.git
40 lines
1.3 KiB
Go
40 lines
1.3 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
// Package readingtime provides a function to estimate the reading time of an article.
|
|
package readingtime
|
|
|
|
import (
|
|
"math"
|
|
"strings"
|
|
"unicode/utf8"
|
|
|
|
"miniflux.app/v2/internal/reader/sanitizer"
|
|
|
|
"github.com/abadojack/whatlanggo"
|
|
)
|
|
|
|
// EstimateReadingTime returns the estimated reading time of an article in minute.
|
|
func EstimateReadingTime(content string, defaultReadingSpeed, cjkReadingSpeed int) int {
|
|
sanitizedContent := sanitizer.StripTags(content)
|
|
|
|
// Litterature on language detection says that around 100 signes is enough, we're safe here.
|
|
truncationPoint := int(math.Min(float64(len(sanitizedContent)), 250))
|
|
|
|
// We're only interested in identifying Japanse/Chinese/Korean
|
|
options := whatlanggo.Options{
|
|
Whitelist: map[whatlanggo.Lang]bool{
|
|
whatlanggo.Jpn: true,
|
|
whatlanggo.Cmn: true,
|
|
whatlanggo.Kor: true,
|
|
},
|
|
}
|
|
langInfo := whatlanggo.DetectWithOptions(sanitizedContent[:truncationPoint], options)
|
|
|
|
if langInfo.IsReliable() {
|
|
return int(math.Ceil(float64(utf8.RuneCountInString(sanitizedContent)) / float64(cjkReadingSpeed)))
|
|
}
|
|
nbOfWords := len(strings.Fields(sanitizedContent))
|
|
return int(math.Ceil(float64(nbOfWords) / float64(defaultReadingSpeed)))
|
|
}
|