1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
import { merge } from "../core/utils/object.ts";
import type Site from "../core/site.ts";
export interface Options {  /** The key name to store the reading info value and the filter */  name?: string;
  /** The list extensions this plugin applies to */  extensions?: string[];
  /** The words per minute a reader can read (default: 275) */  wordsPerMinute?: number;}
export const defaults: Options = {  name: "readingInfo",  extensions: [".md"],  wordsPerMinute: 275,};
export default function (userOptions?: Options) {  const options = merge(defaults, userOptions);
  return (site: Site) => {    site.preprocess(options.extensions, (pages) => {      pages.forEach((page) => {        const { content, lang } = page.data;
        page.data[options.name] = readingInfo(          typeof content === "string" ? content : undefined,          lang as string,        );      });    });
    site.filter("readingInfo", readingInfo);  };
  function readingInfo(content?: string, lang = "en"): ReadingInfo {    if (!content || typeof content !== "string") {      return {        words: 0,        minutes: 0,        time: 0,      };    }
    const segmenter = new Intl.Segmenter(lang, {      granularity: "word",    });
    let wordCount = 0;    for (const word of segmenter.segment(content)) {      if (word.isWordLike) {        wordCount++;      }    }
    const minutes = wordCount / options.wordsPerMinute;    const time = Math.round(minutes * 60 * 1000);    const displayTime = Math.ceil(parseFloat(minutes.toFixed(2)));
    return {      words: wordCount,      minutes: displayTime,      time,    };  }}
export interface ReadingInfo {  /** The number of words in the content */  words: number;
  /** The number of minutes it takes to read the content */  minutes: number;
  /** The number of milliseconds it takes to read the content */  time: number;}