mithril_signer/database/query/protocol_initializer/
get_protocol_initializer.rs

1use sqlite::Value;
2
3use mithril_common::entities::Epoch;
4use mithril_persistence::sqlite::{Query, SourceAlias, SqLiteEntity, WhereCondition};
5
6use crate::database::record::ProtocolInitializerRecord;
7
8/// Simple queries to retrieve [ProtocolInitializer] from the sqlite database.
9pub struct GetProtocolInitializerQuery {
10    condition: WhereCondition,
11    limit: Option<usize>,
12}
13
14impl GetProtocolInitializerQuery {
15    /// Get protocol initializer that match the epoch.
16    pub fn for_epoch(epoch: Epoch) -> Self {
17        let epoch_i64: i64 = epoch.try_into().unwrap();
18        let condition = WhereCondition::new(
19            "protocol_initializer.epoch = ?",
20            vec![Value::Integer(epoch_i64)],
21        );
22
23        Self {
24            condition,
25            limit: None,
26        }
27    }
28
29    pub fn last_n(limit: usize) -> Self {
30        let condition = WhereCondition::default();
31        Self {
32            condition,
33            limit: Some(limit),
34        }
35    }
36}
37
38impl Query for GetProtocolInitializerQuery {
39    type Entity = ProtocolInitializerRecord;
40
41    fn filters(&self) -> WhereCondition {
42        self.condition.clone()
43    }
44
45    fn get_definition(&self, condition: &str) -> String {
46        let aliases = SourceAlias::new(&[("{:protocol_initializer:}", "protocol_initializer")]);
47        let projection = Self::Entity::get_projection().expand(aliases);
48        let limit = self
49            .limit
50            .map_or("".to_string(), |limit| format!(" limit {}", limit));
51        format!("select {projection} from protocol_initializer where {condition} order by rowid desc{limit}")
52    }
53}

mithril_signer/database/query/protocol_initializer/get_protocol_initializer.rs

mithril_signer/database/query/protocol_initializer/
get_protocol_initializer.rs