es-entity 0.10.35

Event Sourcing Entity Framework
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
132

#![allow(dead_code)]

use derive_builder::Builder;
use serde::{Deserialize, Serialize};

use es_entity::*;

es_entity::entity_id! { ProfileId }

#[derive(EsEvent, Debug, Serialize, Deserialize)]
#[serde(tag = "type", rename_all = "snake_case")]
#[es_event(id = "ProfileId")]
pub enum ProfileEvent {
    Initialized {
        id: ProfileId,
        name: String,
        email: String,
    },
    NameUpdated {
        name: String,
    },
    EmailUpdated {
        email: String,
    },
}

#[derive(Debug)]
pub struct ProfileData {
    pub name: String,
}

#[derive(EsEntity, Builder)]
#[builder(pattern = "owned", build_fn(error = "EntityHydrationError"))]
pub struct Profile {
    pub id: ProfileId,
    pub data: ProfileData,
    pub email: String,

    events: EntityEvents<ProfileEvent>,
}

impl Profile {
    pub fn display_name(&self) -> String {
        format!("Profile: {}", self.data.name)
    }

    pub fn update_name(&mut self, new_name: impl Into<String>) -> Idempotent<()> {
        let new_name = new_name.into();
        idempotency_guard!(
            self.events.iter_all().rev(),
            already_applied: ProfileEvent::NameUpdated { name } if name == &new_name,
            resets_on: ProfileEvent::NameUpdated { .. }
        );

        self.data.name = new_name.clone();
        self.events
            .push(ProfileEvent::NameUpdated { name: new_name });

        Idempotent::Executed(())
    }

    pub fn update_email(&mut self, new_email: impl Into<String>) -> Idempotent<()> {
        let new_email = new_email.into();
        idempotency_guard!(
            self.events.iter_all().rev(),
            already_applied: ProfileEvent::EmailUpdated { email } if email == &new_email,
            resets_on: ProfileEvent::EmailUpdated { .. }
        );

        self.email = new_email.clone();
        self.events
            .push(ProfileEvent::EmailUpdated { email: new_email });

        Idempotent::Executed(())
    }
}

impl TryFromEvents<ProfileEvent> for Profile {
    fn try_from_events(events: EntityEvents<ProfileEvent>) -> Result<Self, EntityHydrationError> {
        let mut builder = ProfileBuilder::default();
        for event in events.iter_all() {
            match event {
                ProfileEvent::Initialized { id, name, email } => {
                    builder = builder
                        .id(*id)
                        .data(ProfileData { name: name.clone() })
                        .email(email.clone());
                }
                ProfileEvent::NameUpdated { name } => {
                    builder = builder.data(ProfileData { name: name.clone() });
                }
                ProfileEvent::EmailUpdated { email } => {
                    builder = builder.email(email.clone());
                }
            }
        }
        builder.events(events).build()
    }
}

#[derive(Debug, Builder)]
pub struct NewProfile {
    #[builder(setter(into))]
    pub id: ProfileId,
    #[builder(setter(into))]
    pub name: String,
    #[builder(setter(into))]
    pub email: String,
}

impl NewProfile {
    pub fn builder() -> NewProfileBuilder {
        NewProfileBuilder::default()
    }

    pub fn display_name(&self) -> String {
        format!("Profile: {}", self.name)
    }
}

impl IntoEvents<ProfileEvent> for NewProfile {
    fn into_events(self) -> EntityEvents<ProfileEvent> {
        EntityEvents::init(
            self.id,
            [ProfileEvent::Initialized {
                id: self.id,
                name: self.name,
                email: self.email,
            }],
        )
    }
}