msg_store_server_api 0.1.1

The backbone of the msg-store api that can be embedded into various server implementations
Documentation 
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

use msg_store::{Store, StoreDefaults, StoreError};
use msg_store_database_plugin::DatabaseError;
use std::fmt::Display;
use std::path::PathBuf;
use std::sync::Mutex;
use crate::Database;
use crate::config::{StoreConfig, update_config, ConfigError};
use crate::file_storage::{FileStorage, rm_from_file_storage, FileStorageError};
use crate::stats::Stats;

#[derive(Debug)]
pub enum ErrTy {
    ConfigError(ConfigError),
    DatabaseError(DatabaseError),
    FileStorageError(FileStorageError),
    StoreError(StoreError),
    LockingError
}
impl Display for ErrTy {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::ConfigError(err) => write!(f, "({})", err),
            Self::DatabaseError(err) => write!(f, "({})", err),
            Self::FileStorageError(err) => write!(f, "({})", err),
            Self::StoreError(err) => write!(f, "({})", err),
            Self::LockingError => write!(f, "{:#?}", self)
        }
    }
}

#[derive(Debug)]
pub struct ApiError {
    pub err_ty: ErrTy,
    pub file: &'static str,
    pub line: u32,
    pub msg: Option<String>
}

impl Display for ApiError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        if let Some(msg) = &self.msg {
            write!(f, "SET_STORE_ERROR: {}. file: {}, line: {}, msg: {}", self.err_ty, self.file, self.line, msg)
        } else {
            write!(f, "SET_STORE_ERROR: {}. file: {}, line: {}.", self.err_ty, self.file, self.line)
        }
    }   
}

macro_rules! api_error {
    ($err_ty:expr) => {
        ApiError {
            err_ty: $err_ty,
            file: file!(),
            line: line!(),
            msg: None
        }
    };
    ($err_ty:expr, $msg:expr) => {
        ApiError {
            err_ty: $err_ty,
            file: file!(),
            line: line!(),
            msg: Some($msg.to_string())
        }
    };
}

pub async fn handle(
    store_mutex: &Mutex<Store>,
    database_mx: &Mutex<Database>,
    file_storage_option: &Option<Mutex<FileStorage>>,
    stats_mutex: &Mutex<Stats>,
    store_config_mutex: &Mutex<StoreConfig>,
    store_config_path_option: &Option<PathBuf>,
    max_byte_size: Option<u64>
) -> Result<(), ApiError> {
    let mut store = match store_mutex.lock() {
        Ok(gaurd) => Ok(gaurd),
        Err(err) => Err(api_error!(ErrTy::LockingError, err))
    }?;
    let mut database = match database_mx.lock() {
        Ok(gaurd) => Ok(gaurd),
        Err(err) => Err(api_error!(ErrTy::LockingError, err))
    }?;
    let mut stats = match stats_mutex.lock() {
        Ok(gaurd) => Ok(gaurd),
        Err(err) => Err(api_error!(ErrTy::LockingError, err))
    }?;
    let mut config = match store_config_mutex.lock() {
        Ok(gaurd) => Ok(gaurd),
        Err(err) => Err(api_error!(ErrTy::LockingError, err))
    }?;
    let (prune_count, pruned_uuids) = {
        store.max_byte_size = max_byte_size;
        let defaults = StoreDefaults {
            max_byte_size,
        };
        match store.update_store_defaults(&defaults) {
            Ok((_bytes_removed, _groups_removed, msgs_removed)) => Ok((msgs_removed.len() as u64, msgs_removed)),
            Err(err) => Err(api_error!(ErrTy::StoreError(err)))
        }
    }?;
    {
        for uuid in &pruned_uuids {
            if let Err(err) = database.del(uuid.clone()) {
                return Err(api_error!(ErrTy::DatabaseError(err)))
            }
        }
    }
    if let Some(file_storage_mutex) = file_storage_option {
        let mut file_storage = match file_storage_mutex.lock() {
            Ok(gaurd) => Ok(gaurd),
            Err(err) => Err(api_error!(ErrTy::LockingError, err))
        }?;
        for uuid in pruned_uuids {
            if let Err(err) = rm_from_file_storage(&mut file_storage, &uuid) {
                return Err(api_error!(ErrTy::FileStorageError(err)))
            }
        }
    }
    {
        stats.pruned += prune_count;
    }
    {
        config.max_byte_size = max_byte_size;
        if let Err(err) = update_config(&mut config, store_config_path_option) {
            return Err(api_error!(ErrTy::ConfigError(err)))
        }
    }
    Ok(())
}