adguard-flm 2.6.0

This crate represents a library for managing AdGuard filter lists
Documentation 
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use rusqlite::{Result, Row};

use crate::{FilterId, MAXIMUM_CUSTOM_FILTER_ID};

use super::hydrate::Hydrate;

/// Entity for metadata table
pub(crate) struct DBMetadataEntity {
    /// Database version
    pub(crate) version: i32,
    /// Last autoincrement value for custom filters
    /// Value between [`crate::MINIMUM_CUSTOM_FILTER_ID`] and [`crate::MAXIMUM_CUSTOM_FILTER_ID`]
    pub(crate) custom_filters_autoincrement_value: FilterId,
    /// Signed count of all filter records.
    /// `None` when integrity protection is disabled or not yet computed.
    pub(crate) filter_count_signature: Option<String>,
}

impl Default for DBMetadataEntity {
    fn default() -> Self {
        DBMetadataEntity {
            version: 0,
            custom_filters_autoincrement_value: MAXIMUM_CUSTOM_FILTER_ID,
            filter_count_signature: None,
        }
    }
}

impl Hydrate for DBMetadataEntity {
    fn hydrate(row: &Row) -> Result<DBMetadataEntity> {
        Ok(DBMetadataEntity {
            version: row.get(0)?,
            custom_filters_autoincrement_value: row.get(1)?,
            filter_count_signature: row.get(2)?,
        })
    }
}