hotfix-message 0.4.0

FIX messages for HotFIX.
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

use crate::FieldType;
use crate::Part;
use crate::parts::RepeatingGroup;
use hotfix_dictionary::TagU32;
use indexmap::IndexMap;

#[derive(Clone, Debug)]
pub struct Field {
    pub(crate) tag: TagU32,
    pub data: Vec<u8>,
}

impl Field {
    pub fn new(tag: TagU32, data: Vec<u8>) -> Self {
        Self { tag, data }
    }

    pub fn calculate_length(&self) -> usize {
        self.tag.to_bytes().len() + self.data.len() + 2
    }
}

#[derive(Clone, Debug, Default)]
pub struct FieldMap {
    pub fields: IndexMap<TagU32, Field>,
    pub groups: IndexMap<TagU32, Vec<RepeatingGroup>>,
}

impl FieldMap {
    pub fn insert(&mut self, field: Field) {
        self.fields.insert(field.tag, field);
    }

    pub fn set_groups(&mut self, start_tag: TagU32, groups: Vec<RepeatingGroup>) {
        self.groups.insert(start_tag, groups);
    }

    pub fn get_raw(&self, tag: TagU32) -> Option<&[u8]> {
        self.fields.get(&tag).map(|f| f.data.as_slice())
    }

    pub fn get_group(&self, start_tag: TagU32, index: usize) -> Option<&RepeatingGroup> {
        self.groups
            .get(&start_tag)
            .and_then(|groups| groups.get(index))
    }

    pub fn calculate_length(&self, skip: &[TagU32]) -> usize {
        let fields_length: usize = self
            .fields
            .values()
            .filter(|f| !skip.contains(&f.tag))
            .map(|f| f.calculate_length())
            .sum();
        let groups_length: usize = self
            .groups
            .iter()
            .flat_map(|g| g.1)
            .map(|g| g.calculate_length())
            .sum();

        fields_length + groups_length
    }
}