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

use std::collections::HashMap;

use chrono::{serde::ts_milliseconds, DateTime, Utc};
use serde::{Deserialize, Serialize};
use uuid::Uuid;

use super::constants::{ACTIVITY_NAME, TRACE_ID_NAME};

///
/// Possible attribute values according to the XES Standard
///
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "type", content = "content")]
pub enum AttributeValue {
    String(String),
    #[serde(with = "ts_milliseconds")]
    Date(DateTime<Utc>),
    Int(i64),
    Float(f64),
    Boolean(bool),
    ID(Uuid),
    List(Vec<Attribute>),
    Container(Attributes),
    None(),
}

///
/// Attribute made up of the key and value
///
/// Depending on usage, the key field might be redundant but useful for some implementations
///
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Attribute {
    pub key: String,
    pub value: AttributeValue,
    pub own_attributes: Option<Attributes>,
}
impl Attribute {
    ///
    /// Helper to create a new attribute
    ///
    pub fn new(key: String, attribute_val: AttributeValue) -> Self {
        Self {
            key,
            value: attribute_val,
            own_attributes: None,
        }
    }
    ///
    /// Helper to create a new attribute, while returning the key String additionally
    ///
    /// This is useful for directly inserting the attribute in a [HashMap] afterwards
    ///
    pub fn new_with_key(key: String, attribute_val: AttributeValue) -> (String, Self) {
        (
            key.clone(),
            Self {
                key,
                value: attribute_val,
                own_attributes: None,
            },
        )
    }
}

///
/// Attributes are [HashMap] mapping a key ([String]) to an [Attribute]
///
pub type Attributes = HashMap<String, Attribute>;

///
/// Trait to easily add a new attribute
pub trait AttributeAddable {
    fn add_to_attributes(
        self: &mut Self,
        key: String,
        value: AttributeValue,
    ) -> Option<&mut Attribute>;
}
impl AttributeAddable for Attributes {
    ///
    /// Add a new attribute (with key and value)
    ///
    fn add_to_attributes(
        self: &mut Self,
        key: String,
        value: AttributeValue,
    ) -> Option<&mut Attribute> {
        let (k, v) = Attribute::new_with_key(key, value);
        self.insert(k.clone(), v);
        return self.get_mut(&k);
    }
}

pub fn to_attributes(from: HashMap<String, AttributeValue>) -> Attributes {
    from.into_iter()
        .map(|(key, value)| {
            (
                key.clone(),
                Attribute {
                    key: key.clone(),
                    value,
                    own_attributes: None,
                },
            )
        })
        .collect()
}

///
/// An event consists of multiple (event) attributes ([Attributes])
///
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Event {
    pub attributes: Attributes,
}
impl Event {
    pub fn new(activity: String) -> Self {
        Event {
            attributes: to_attributes(
                vec![(ACTIVITY_NAME.to_string(), AttributeValue::String(activity))]
                    .into_iter()
                    .collect(),
            ),
        }
    }
}

///
/// A trace consists of a list of events and trace attributes (See also [Event] and [Attributes])
///
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Trace {
    pub attributes: Attributes,
    pub events: Vec<Event>,
}
impl Trace {
    pub fn new(activity: String) -> Self {
        Trace {
            events: Vec::new(),
            attributes: to_attributes(
                vec![(TRACE_ID_NAME.to_string(), AttributeValue::String(activity))]
                    .into_iter()
                    .collect(),
            ),
        }
    }
}

///
/// A event log consists of a list of traces and log attributes (See also [Trace] and [Attributes])
///
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EventLog {
    pub attributes: Attributes,
    pub traces: Vec<Trace>,
    pub extensions: Option<Vec<EventLogExtension>>,
    pub classifiers: Option<Vec<EventLogClassifier>>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EventLogExtension {
    pub name: String,
    pub prefix: String,
    pub uri: String,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EventLogClassifier {
    pub name: String,
    pub keys: Vec<String>,
}