vstorage/sync/
error.rs

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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
// Copyright 2023-2024 Hugo Osvaldo Barrera
//
// SPDX-License-Identifier: EUPL-1.2

//! Types for granular error management.
//!
//! These types represent non-fatal errors which may occurs during synchronisation.

use crate::base::Item;

use super::{
    execute::ExecutionError,
    plan::{CollectionAction, ItemAction, PropertyAction, ResolvedMapping},
};

/// An error synchronising two items between storages.
///
/// This error contains details on a non-fatal error that occurred during synchronisation. It
/// contains enough data to provide a meaningful description of what has gone wrong.
///
/// Use the [`std::fmt::Display`] implementation for a quick description.
#[derive(Debug)]
pub struct SyncError<I: Item> {
    action: SomeAction<I>,
    error: ExecutionError,
}

impl<I: Item> SyncError<I> {
    #[must_use]
    pub fn item(action: ItemAction<I>, error: ExecutionError) -> Self {
        Self {
            action: SomeAction::Item(Box::from(action)),
            error,
        }
    }

    #[must_use]
    pub fn collection(
        action: CollectionAction,
        mapping: ResolvedMapping,
        error: ExecutionError,
    ) -> Self {
        Self {
            action: SomeAction::Collection { action, mapping },
            error,
        }
    }

    #[must_use]
    pub fn property(action: PropertyAction, error: ExecutionError) -> Self {
        Self {
            action: SomeAction::Property(action),
            error,
        }
    }
}

impl<I: Item> std::fmt::Display for SyncError<I> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "Error executing {}: {}", self.action, self.error)
    }
}

impl<I: Item> std::error::Error for SyncError<I> {
    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
        Some(&self.error)
    }
}

/// An action that has failed to execute. See [`SyncError`].
#[derive(Debug)]
pub enum SomeAction<I: Item> {
    Item(Box<ItemAction<I>>),
    // TODO: this is missing the details of the collection itself (e.g.: alias?).
    Collection {
        action: CollectionAction,
        mapping: ResolvedMapping,
    },
    // FIXME: missing details of property. Do I need Property::display ?
    Property(PropertyAction),
}

impl<I: Item> std::fmt::Display for SomeAction<I> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            SomeAction::Item(action) => {
                write!(f, "item action '{action}'")
            }
            SomeAction::Collection { action, mapping } => {
                write!(f, "collection action '{action}' for '{}'", mapping.alias())
            }
            SomeAction::Property(action) => {
                write!(f, "property action '{action}'")
            }
        }
    }
}

#[cfg(test)]
mod test {
    use std::backtrace::Backtrace;

    use crate::{
        base::IcsItem,
        sync::{
            declare::DeclaredMapping,
            error::SomeAction,
            execute::ExecutionError,
            plan::{CollectionAction, ItemAction, ResolvedMapping},
            status::{ItemState, Side},
        },
    };

    use super::SyncError;

    #[test]
    fn test_syncerror_item_display() {
        let err = SyncError {
            action: SomeAction::Item(Box::from(ItemAction::Create {
                side: Side::A,
                source: ItemState::<IcsItem> {
                    href: "/path/to/some/file.vcf".into(),
                    uid: "d99ed506-dceb-49f2-a1c9-efa63c68acd0".into(),
                    etag: "123890".into(),
                    hash: "0000000000000000000000000000000000000000000000000000000000000000"
                        .parse()
                        .unwrap(),
                    data: None,
                },
            })),
            error: ExecutionError::Storage(crate::Error {
                kind: crate::ErrorKind::AccessDenied,
                source: Some(Box::from(std::io::Error::new(
                    std::io::ErrorKind::PermissionDenied,
                    "Not enough mana",
                ))),
                backtrace: Backtrace::capture(),
            }),
        };
        let msg = err.to_string();
        let expected = concat!(
            "Error executing item action 'create in storage a (uid: d99ed506-dceb-49f2-a1c9-efa63c68acd0)': ",
            "access to the resource was denied: ",
            "Not enough mana"
        );
        assert_eq!(msg, expected);
    }

    // #[test]
    // fn test_syncerror_collection_display() {
    //     let err = SyncError::<IcsItem> {
    //         action: SomeAction::Collection {
    //             action: CollectionAction::CreateInB,
    //             alias: "guests",
    //         },
    //         error: ExecutionError::Storage(crate::Error {
    //             kind: crate::ErrorKind::AccessDenied,
    //             source: Some(Box::from(std::io::Error::new(
    //                 std::io::ErrorKind::PermissionDenied,
    //                 "Creating new collections is forbidden",
    //             ))),
    //             backtrace: Backtrace::capture(),
    //         }),
    //     };
    //     let msg = err.to_string();
    //     let expected = concat!(
    //         "Error executing collection action 'create in storage b' for 'guests': ",
    //         "access to the resource was denied: ",
    //         "Creating new collections is forbidden"
    //     );
    //     assert_eq!(msg, expected);
    // }
}