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

// Copyright (c) 2021 Anatoly Ikorsky
//
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. All files in the project carrying such notice may not be copied,
// modified, or distributed except according to those terms.

use std::borrow::Cow;

use crate::misc::raw::Either;

use super::{BinlogDumpFlags, ComBinlogDump, ComBinlogDumpGtid, Sid};

/// Binlog request representation. Please consult MySql documentation.
///
/// This struct is a helper builder for [`ComBinlogDump`] and [`ComBinlogDumpGtid`].
#[derive(Debug, Clone, Eq, PartialEq, Hash)]
pub struct BinlogRequest<'a> {
    /// Server id of a slave.
    server_id: u32,
    /// If true, then `COM_BINLOG_DUMP_GTID` will be used.
    use_gtid: bool,
    /// If `use_gtid` is `false`, then all flags except `BINLOG_DUMP_NON_BLOCK` will be truncated.
    flags: BinlogDumpFlags,
    /// Filename of the binlog on the master.
    filename: Cow<'a, [u8]>,
    /// Position in the binlog-file to start the stream with.
    ///
    /// If `use_gtid` is `false`, then the value will be truncated to u32.
    pos: u64,
    /// SID blocks. If `use_gtid` is `false`, then this value is ignored.
    sids: Vec<Sid<'a>>,
}

impl<'a> BinlogRequest<'a> {
    /// Creates new request with the given slave server id.
    pub fn new(server_id: u32) -> Self {
        Self {
            server_id,
            use_gtid: false,
            flags: BinlogDumpFlags::empty(),
            filename: Default::default(),
            pos: 4,
            sids: vec![],
        }
    }

    /// Server id of a slave.
    pub fn server_id(&self) -> u32 {
        self.server_id
    }

    /// If true, then `COM_BINLOG_DUMP_GTID` will be used (defaults to `false`).
    pub fn use_gtid(&self) -> bool {
        self.use_gtid
    }

    /// If `use_gtid` is `false`, then all flags except `BINLOG_DUMP_NON_BLOCK` will be truncated
    /// (defaults to empty).
    pub fn flags(&self) -> BinlogDumpFlags {
        self.flags
    }

    /// Filename of the binlog on the master (defaults to an empty string).
    pub fn filename_raw(&'a self) -> &'a [u8] {
        self.filename.as_ref()
    }

    /// Filename of the binlog on the master as a UTF-8 string (lossy converted)
    /// (defaults to an empty string).
    pub fn filename(&'a self) -> &'a [u8] {
        self.filename.as_ref()
    }

    /// Position in the binlog-file to start the stream with (defaults to `4`).
    ///
    /// If `use_gtid` is `false`, then the value will be truncated to u32.
    pub fn pos(&self) -> u64 {
        self.pos
    }

    /// If `use_gtid` is `false`, then this value will be ignored (defaults to an empty vector).
    pub fn sids(&self) -> &[Sid<'_>] {
        &self.sids
    }

    /// Returns modified `self` with the given value of the `server_id` field.
    pub fn with_server_id(mut self, server_id: u32) -> Self {
        self.server_id = server_id;
        self
    }

    /// Returns modified `self` with the given value of the `use_gtid` field.
    pub fn with_use_gtid(mut self, use_gtid: bool) -> Self {
        self.use_gtid = use_gtid;
        self
    }

    /// Returns modified `self` with the given value of the `flags` field.
    pub fn with_flags(mut self, flags: BinlogDumpFlags) -> Self {
        self.flags = flags;
        self
    }

    /// Returns modified `self` with the given value of the `filename` field.
    pub fn with_filename(mut self, filename: impl Into<Cow<'a, [u8]>>) -> Self {
        self.filename = filename.into();
        self
    }

    /// Returns modified `self` with the given value of the `pos` field.
    pub fn with_pos<T: Into<u64>>(mut self, pos: T) -> Self {
        self.pos = pos.into();
        self
    }

    /// Returns modified `self` with the given value of the `sid_blocks` field.
    pub fn with_sids<T>(mut self, sids: T) -> Self
    where
        T: IntoIterator<Item = Sid<'a>>,
    {
        self.sids = sids.into_iter().collect();
        self
    }

    pub fn as_cmd(&self) -> Either<ComBinlogDump<'_>, ComBinlogDumpGtid<'_>> {
        if self.use_gtid() {
            let cmd = ComBinlogDumpGtid::new(self.server_id)
                .with_pos(self.pos)
                .with_flags(self.flags)
                .with_filename(&*self.filename)
                .with_sids(&*self.sids);
            Either::Right(cmd)
        } else {
            let cmd = ComBinlogDump::new(self.server_id)
                .with_pos(self.pos as u32)
                .with_filename(&*self.filename)
                .with_flags(self.flags & BinlogDumpFlags::BINLOG_DUMP_NON_BLOCK);
            Either::Left(cmd)
        }
    }
}