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
83
84
85
86
87

use crate::models::error::{ModelError, ModelErrorKind};
use diesel::backend::RawValue;
use diesel::deserialize::{self, FromSql};
use diesel::serialize::{self, IsNull, Output, ToSql};
use diesel::sql_types::Text;
use diesel::sqlite::Sqlite;
use failure::ResultExt;
use log::error;
use std::fmt;
use std::ops::{Deref, DerefMut};
use std::str;

#[derive(Debug, PartialEq, Eq, Hash, Clone, AsExpression, FromSqlRow)]
#[diesel(sql_type = Text)]
pub struct Url(url::Url);

impl Url {
    pub fn new(url: url::Url) -> Self {
        Url(url)
    }

    pub fn parse(url: &str) -> Result<Self, ModelError> {
        let url = url::Url::parse(url)
            .map_err(move |err| {
                error!("Failed parsing url: {}", url);
                err
            })
            .context(ModelErrorKind::Url)?;
        Ok(Url::new(url))
    }

    pub fn base(&self) -> Self {
        let mut clone = self.clone();
        clone.set_path("");
        clone.set_query(None);
        clone.set_fragment(None);
        clone
    }
}

impl Deref for Url {
    type Target = url::Url;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl DerefMut for Url {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.0
    }
}

impl fmt::Display for Url {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.0)
    }
}

impl FromSql<Text, Sqlite> for Url {
    fn from_sql(bytes: RawValue<Sqlite>) -> deserialize::Result<Self> {
        let bytes = <Vec<u8>>::from_sql(bytes)?;
        let string = str::from_utf8(&bytes)?;
        let url = url::Url::parse(string)?;
        Ok(Url::new(url))
    }
}

impl ToSql<Text, Sqlite> for Url {
    fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Sqlite>) -> serialize::Result {
        out.set_value(self.as_str());
        Ok(IsNull::No)
    }
}

#[cfg(test)]
mod tests {
    use super::Url;

    #[test]
    fn base_url() {
        let url = Url::parse("https://kryogenix.org/images/me/hackergotchi-simpler.png").unwrap();
        let base = url.base();
        assert_eq!("https://kryogenix.org/", base.to_string())
    }
}