vimwiki-server 0.1.0

Daemon that supports parsing and modifying vimwiki files.
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

use derive_more::Display;
use entity::*;
use std::convert::TryFrom;

#[derive(Debug, Display)]
pub enum GraphqlDatabaseError {
    Database(DatabaseError),
    Builder(Box<dyn std::error::Error>),
}

impl GraphqlDatabaseError {
    pub fn wrap<T, E: std::error::Error + 'static>(
        x: Result<Result<T, DatabaseError>, E>,
    ) -> Result<T, Self> {
        match Self::try_from(x) {
            Ok(x) => Err(x),
            Err(x) => Ok(x),
        }
    }

    /// Produces a builder variant of the database error that wraps the provided
    /// error instance
    pub fn custom_builder_error<I: Into<Box<dyn std::error::Error>>>(
        e: I,
    ) -> Self {
        Self::Builder(e.into())
    }
}

impl std::error::Error for GraphqlDatabaseError {}

impl<T, E> TryFrom<Result<Result<T, DatabaseError>, E>> for GraphqlDatabaseError
where
    E: std::error::Error + 'static,
{
    type Error = T;

    fn try_from(
        x: Result<Result<T, DatabaseError>, E>,
    ) -> Result<Self, Self::Error> {
        match x {
            Ok(x) => match x {
                Ok(x) => Err(x),
                Err(x) => Ok(GraphqlDatabaseError::Database(x)),
            },
            Err(x) => Ok(GraphqlDatabaseError::Builder(Box::new(x))),
        }
    }
}