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172 lines
5.0 KiB
172 lines
5.0 KiB
use crate::utils::get_random_str; |
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use rusqlite::{params, Connection, Row}; |
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use serde::{Deserialize, Serialize}; |
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use std::sync::{Arc, Mutex}; |
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pub const ID_LENGTH: usize = 20; |
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pub type SegmentId = String; |
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// TODO: make logic with this enum shorter |
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#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq)] |
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pub enum SegmentType { |
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Detection = 0, |
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Label = 1, |
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AntiLabel = 2, |
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} |
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impl SegmentType { |
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fn from(u: u64) -> SegmentType { |
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if u == 1 { |
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SegmentType::Label |
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} else if u == 2 { |
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SegmentType::AntiLabel |
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} else { |
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SegmentType::Detection |
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} |
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} |
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fn to_integer(&self) -> u64 { |
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if *self == SegmentType::Label { |
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1 |
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} else if *self == SegmentType::AntiLabel { |
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2 |
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} else { |
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0 |
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} |
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} |
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} |
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#[derive(Debug, Serialize, Deserialize)] |
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pub struct Segment { |
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pub id: Option<SegmentId>, |
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pub from: u64, |
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pub to: u64, |
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pub segment_type: SegmentType, |
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} |
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impl Segment { |
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fn from(row: &Row) -> anyhow::Result<Segment, rusqlite::Error> { |
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Ok(Segment { |
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id: row.get(0)?, |
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from: row.get(1)?, |
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to: row.get(2)?, |
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segment_type: SegmentType::from(row.get(3)?), |
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}) |
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} |
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} |
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#[derive(Clone)] |
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pub struct SegmentsService { |
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connection: Arc<Mutex<Connection>>, |
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} |
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impl SegmentsService { |
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pub fn new() -> anyhow::Result<SegmentsService> { |
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// TODO: move it to data service |
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std::fs::create_dir_all("./data").unwrap(); |
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// TODO: add unilytic_unit id as a new field |
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let conn = Connection::open("./data/segments.db")?; |
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conn.execute( |
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"CREATE TABLE IF NOT EXISTS segment ( |
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id TEXT PRIMARY KEY, |
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start INTEGER NOT NULL, |
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end INTEGER NOT NULL, |
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segment_type INTEGER NOT NULL |
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)", |
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[], |
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)?; |
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Ok(SegmentsService { |
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connection: Arc::new(Mutex::new(conn)), |
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}) |
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} |
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// returns id of created segment |
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pub fn insert_segment(&self, segment: &Segment) -> anyhow::Result<Segment> { |
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let id: SegmentId = get_random_str(ID_LENGTH); |
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// merging |
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let sgms = self.get_segments_intersected(segment.from, segment.to)?; |
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let mut min = segment.from; |
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let mut max = segment.to; |
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let mut ids_to_delete = Vec::<SegmentId>::new(); |
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for s in sgms { |
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min = min.min(s.from); |
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max = max.max(s.to); |
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ids_to_delete.push(s.id.unwrap()); |
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} |
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self.delete_segments(&ids_to_delete)?; |
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self.connection.lock().unwrap().execute( |
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"INSERT INTO segment (id, start, end, segment_type) VALUES (?1, ?2, ?3, ?4)", |
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params![id, min, max, segment.segment_type.to_integer()], |
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)?; |
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Ok(Segment { |
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id: Some(id), |
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from: min, |
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to: max, |
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segment_type: segment.segment_type, |
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}) |
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} |
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pub fn get_segments_inside(&self, from: u64, to: u64) -> anyhow::Result<Vec<Segment>> { |
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let conn = self.connection.lock().unwrap(); |
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let mut stmt = conn.prepare( |
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"SELECT id, start, end, segment_type FROM segment WHERE ?1 < start AND end < ?2", |
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)?; |
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let res = stmt |
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.query_map(params![from, to], Segment::from)? |
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.map(|e| e.unwrap()) |
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.collect(); |
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Ok(res) |
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} |
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pub fn get_segments_intersected(&self, from: u64, to: u64) -> anyhow::Result<Vec<Segment>> { |
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let conn = self.connection.lock().unwrap(); |
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let mut stmt = conn.prepare( |
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"SELECT id, start, end, segment_type |
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FROM segment |
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WHERE (start <= ?1 and ?1 <= end) OR |
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(start <= ?2 AND ?2 <= end) OR |
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(?1 <= start AND start <= ?2) OR |
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(?1 <= end AND end <= ?2) ", |
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)?; |
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let res = stmt |
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.query_map(params![from, to], Segment::from)? |
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.map(|e| e.unwrap()) |
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.collect(); |
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Ok(res) |
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} |
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pub fn delete_segments_in_range(&self, from: u64, to: u64) -> anyhow::Result<usize> { |
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let conn = self.connection.lock().unwrap(); |
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let res = conn.execute( |
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"DELETE FROM segment where ?1 <= start AND end <= ?2", |
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params![from, to], |
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)?; |
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Ok(res) |
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} |
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pub fn delete_segments(&self, ids: &Vec<SegmentId>) -> anyhow::Result<usize> { |
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if ids.len() == 0 { |
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return Ok(0); |
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} |
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// TODO: here could be sql injection if you substitute id with string :) |
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let conn = self.connection.lock().unwrap(); |
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let ids_comma = ids |
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.iter() |
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.map(|id| "\"".to_string() + id + "\"") |
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.collect::<Vec<String>>() |
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.join(","); |
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let query_str = format!("DELETE FROM segment WHERE id in ({})", ids_comma); |
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let mut stmt = conn.prepare(&query_str)?; |
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let res = stmt.execute([])?; |
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Ok(res) |
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} |
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}
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