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

use crate::ENCODE_SET;

fn compute_checksum(term: &str) -> (u32, u32) {
    let mut checksum: u32 = 429955;
    for &byte in term.as_bytes() {
        checksum = checksum.wrapping_add(byte as _);
        checksum = checksum.wrapping_add(checksum << 10);
        checksum ^= checksum >> 6;
    }
    checksum = checksum.wrapping_add(checksum << 3);
    checksum ^= checksum >> 11;
    checksum = checksum.wrapping_add(checksum << 15);
    checksum ^= 3864579582;
    checksum %= 1_000_000;
    (checksum, checksum ^ 429955)
}

/// Returns the URL to the TTS audio for the given term and language.
///
/// # Examples
///
/// ```
/// let url = tts_urls::google_translate::url("Hello, World!", "en");
/// assert_eq!(url, "https://translate.google.com/translate_tts?ie=UTF-8&q=Hello%2C%20World%21&tl=en&tk=418730.60457&client=webapp");
/// ```
pub fn url(term: &str, language: &str) -> String {
    let checksum = compute_checksum(term);
    format!(
        "https://translate.google.com/translate_tts?ie=UTF-8&q={}&tl={}&tk={}.{}&client=webapp",
        percent_encoding::utf8_percent_encode(term, ENCODE_SET),
        language,
        checksum.0,
        checksum.1
    )
}

/// Returns the URL to the TTS audio for the given term, language and speed.
///
/// # Examples
///
/// ```
/// let url = tts_urls::google_translate::url_with_speed("Hello, World!", "en", 0.24);
/// assert_eq!(url, "https://translate.google.com/translate_tts?ie=UTF-8&q=Hello%2C%20World%21&tl=en&tk=418730.60457&client=webapp&ttsspeed=0.24");
/// ```
pub fn url_with_speed(term: &str, language: &str, speed: f32) -> String {
    let checksum = compute_checksum(term);
    format!(
        "https://translate.google.com/translate_tts?ie=UTF-8&q={}&tl={}&tk={}.{}&client=webapp&ttsspeed={}",
        percent_encoding::utf8_percent_encode(term, ENCODE_SET),
        language,
        checksum.0,
        checksum.1,
        speed
    )
}

#[test]
fn test1() {
    assert_eq!(
        url("Добрый день!", "ru"),
        "https://translate.google.com/translate_tts?ie=UTF-8&q=%D0%94%D0%BE%D0%B1%D1%80%D1%8B%D0%B9%20%D0%B4%D0%B5%D0%BD%D1%8C%21&tl=ru&tk=33233.396882&client=webapp"
    );
}

#[test]
fn test2() {
    assert_eq!(
        url_with_speed("Добрый день!", "ru", 0.24),
        "https://translate.google.com/translate_tts?ie=UTF-8&q=%D0%94%D0%BE%D0%B1%D1%80%D1%8B%D0%B9%20%D0%B4%D0%B5%D0%BD%D1%8C%21&tl=ru&tk=33233.396882&client=webapp&ttsspeed=0.24"
    );
}

#[test]
fn test3() {
    assert_eq!(
        url("\n&", "ru"),
        "https://translate.google.com/translate_tts?ie=UTF-8&q=%0A%26&tl=ru&tk=589697.946178&client=webapp"
    );
}