self.tg.spawn(telegram_bot::SendMessage::new(match target {
			Some(user) => user,
			None => self.owner_chat,
		}, msg).parse_mode(parse_mode));
		Ok(())
	}

	pub async fn check<S>(&self, id: &i32, owner: S, real: bool) -> Result<Cow<'_, str>>
	where S: Into<i64> {
		let owner = owner.into();

		let mut posted: i32 = 0;
		let id = {
			let mut set = self.sources.lock().unwrap();
			match set.get(id) {

					rss::Error::Eof => (),
					_ => bail!("Unsupported or mangled content:\n{:?}\n{:#?}\n{:#?}\n", &url, err, status)
				}
			};
			for (date, url) in posts.iter() {
				let mut conn = self.pool.acquire().await
					.with_context(|| format!("Check post fetch conn:\n{:?}", &self.pool))?;
				let post_url: Cow<str> = match url_re {
					Some(ref x) => x.execute(url).into(),
					None => url.into(),
				};
				let row = sqlx::query("select exists(select true from rsstg_post where url = $1 and source_id = $2) as exists;")
					.bind(&*post_url)
					.bind(*id)
					.fetch_one(&mut conn).await
					.with_context(|| format!("Check post:\n{:?}", &conn))?;
				let exists: bool = row.try_get("exists")?;
				if ! exists {
					if this_fetch == None || *date > this_fetch.unwrap() {
						this_fetch = Some(*date);
					};
					self.tg.send( match iv_hash {
							Some(hash) => telegram_bot::SendMessage::new(destination, format!("<a href=\"https://t.me/iv?url={}&rhash={}\"> </a>{0}", &post_url, hash)),
							None => telegram_bot::SendMessage::new(destination, format!("{}", post_url)),
						}.parse_mode(telegram_bot::types::ParseMode::Html)).await
						.context("Can't post message:")?;
					sqlx::query("insert into rsstg_post (source_id, posted, url) values ($1, $2, $3);")
						.bind(*id)
						.bind(date)
						.bind(&*post_url)
						.execute(&mut conn).await
						.with_context(|| format!("Record post:\n{:?}", &conn))?;
					drop(conn);
					tokio::time::sleep(std::time::Duration::new(4, 0)).await;
				};
				posted += 1;
			};
			posts.clear();
		};
		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Update scrape fetch conn:\n{:?}", &self.pool))?;
		sqlx::query("update rsstg_source set last_scrape = now() where source_id = $1;")
			.bind(*id)
			.execute(&mut conn).await
			.with_context(|| format!("Update scrape:\n{:?}", &conn))?;
		Ok(format!("Posted: {}", &posted).into())
	}

	pub async fn delete<S>(&self, source_id: &i32, owner: S) -> Result<Cow<'_, str>>
	where S: Into<i64> {
		let owner = owner.into();

		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Delete fetch conn:\n{:?}", &self.pool))?;
		match sqlx::query("delete from rsstg_source where source_id = $1 and owner = $2;")
			.bind(source_id)
			.bind(owner)
			.execute(&mut conn).await
			.with_context(|| format!("Delete source rule:\n{:?}", &self.pool))?
			.rows_affected() {
			0 => { Ok("No data found found.".into()) },
			x => { Ok(format!("{} sources removed.", x).into()) },
		}
	}

	pub async fn clean<S>(&self, source_id: &i32, owner: S) -> Result<Cow<'_, str>>
	where S: Into<i64> {
		let owner = owner.into();

		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Clean fetch conn:\n{:?}", &self.pool))?;
		match sqlx::query("delete from rsstg_post p using rsstg_source s where p.source_id = $1 and owner = $2 and p.source_id = s.source_id;")
			.bind(source_id)
			.bind(owner)
			.execute(&mut conn).await
			.with_context(|| format!("Clean seen posts:\n{:?}", &self.pool))?
			.rows_affected() {
			0 => { Ok("No data found found.".into()) },
			x => { Ok(format!("{} posts purged.", x).into()) },
		}
	}

	pub async fn enable<S>(&self, source_id: &i32, owner: S) -> Result<&str>
	where S: Into<i64> {
		let owner = owner.into();

			.rows_affected() {
			1 => { Ok("Source disabled.") },
			0 => { Ok("Source not found.") },
			_ => { Err(anyhow!("Database error.")) },
		}
	}

	pub async fn update<S>(&self, update: Option<i32>, channel: &str, channel_id: i64, url: &str, iv_hash: Option<&str>, url_re: Option<&str>, owner: S) -> Result<&str>
	where S: Into<i64> {
		let owner = owner.into();

		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Update fetch conn:\n{:?}", &self.pool))?;

		match match update {

			.bind(channel_id)
			.bind(url)
			.bind(iv_hash)
			.bind(owner)
			.bind(channel)
			.bind(url_re)
			.execute(&mut conn).await {
			Ok(_) => return Ok(match update {
				Some(_) => "Channel updated.",
				None => "Channel added.",
			}),
			Err(sqlx::Error::Database(err)) => {
				match err.downcast::<sqlx::postgres::PgDatabaseError>().routine() {
					Some("_bt_check_unique", ) => {
						return Ok("Duplicate key.")
					},
					Some(_) => {
						return Ok("Database error.")
					},
					None => {
						return Ok("No database error extracted.")
					},
				};
			},
			Err(err) => {
				bail!("Sorry, unknown error:\n{:#?}\n", err);
			},
		};

		}
	}

	pub async fn list<S>(&self, owner: S) -> Result<String>
	where S: Into<i64> {
		let owner = owner.into();

		let mut reply: Vec<Cow<str>> = vec![];
		let mut conn = self.pool.acquire().await
			.with_context(|| format!("List fetch conn:\n{:?}", &self.pool))?;
		reply.push("Channels:".into());
		let rows = sqlx::query("select source_id, channel, enabled, url, iv_hash, url_re from rsstg_source where owner = $1 order by source_id")
			.bind(owner)
			.fetch_all(&mut conn).await?;
		for row in rows.iter() {
			let source_id: i32 = row.try_get("source_id")?;
			let username: &str = row.try_get("channel")?;
			let enabled: bool = row.try_get("enabled")?;
			let url: &str = row.try_get("url")?;
			let iv_hash: Option<&str> = row.try_get("iv_hash")?;
			let url_re: Option<&str> = row.try_get("url_re")?;
			reply.push(format!("\n\\#️⃣ {} \\*️⃣ `{}` {}\n🔗 `{}`", source_id, username,  
				match enabled {
					true  => "🔄 enabled",
					false => "⛔ disabled",
				}, url).into());
			if let Some(hash) = iv_hash {
				reply.push(format!("IV: `{}`", hash).into());
			}
			if let Some(re) = url_re {
				reply.push(format!("RE: `{}`", re).into());
			}
		};
		Ok(reply.join("\n"))
	}
}