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			};
		}
	}

	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 mut conn = self.pool.acquire().await?;

		let id = {
			let mut set = self.sources.lock().unwrap();
			match set.get(id) {
				Some(id) => id.clone(),
				None => {
					let id = Arc::new(*id);
					set.insert(id.clone());
					id.clone()
				},
			}
		};
		let count = Arc::strong_count(&id);
		if count == 2 {
			let source = sqlx::query!("select source_id, channel_id, url, iv_hash, owner, url_re from rsstg_source where source_id = $1 and owner = $2",
				*id, owner).fetch_one(&mut self.pool.acquire().await?).await?;
				*id, owner).fetch_one(&mut *conn).await?;
			let destination = match real {
				true => telegram_bot::UserId::new(source.channel_id),
				false => telegram_bot::UserId::new(source.owner),
			};
			let mut this_fetch: Option<DateTime<chrono::FixedOffset>> = None;
			let mut posts: BTreeMap<DateTime<chrono::FixedOffset>, String> = BTreeMap::new();
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			};
			for (date, url) in posts.iter() {
				let post_url: Cow<str> = match source.url_re {
					Some(ref x) => sedregex::ReplaceCommand::new(x)?.execute(url),
					None => url.into(),
				};
				if let Some(exists) = sqlx::query!("select exists(select true from rsstg_post where url = $1 and source_id = $2) as exists;",
					&post_url, *id).fetch_one(&mut self.pool.acquire().await?).await?.exists {
					&post_url, *id).fetch_one(&mut *conn).await?.exists {
					if ! exists {
						if this_fetch.is_none() || *date > this_fetch.unwrap() {
							this_fetch = Some(*date);
						};
						self.request( match &source.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);",
							*id, date, &post_url).execute(&mut self.pool.acquire().await?).await?;
							*id, date, &post_url).execute(&mut *conn).await?;
					};
				};
				posted += 1;
			};
			posts.clear();
		};
		sqlx::query!("update rsstg_source set last_scrape = now() where source_id = $1;",
			*id).execute(&mut self.pool.acquire().await?).await?;
			*id).execute(&mut *conn).await?;
		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();

		match sqlx::query!("delete from rsstg_source where source_id = $1 and owner = $2;",
			source_id, owner).execute(&mut self.pool.acquire().await?).await?.rows_affected() {
			source_id, owner).execute(&mut *self.pool.acquire().await?).await?.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();

		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;",
			source_id, owner).execute(&mut self.pool.acquire().await?).await?.rows_affected() {
			source_id, owner).execute(&mut *self.pool.acquire().await?).await?.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();

		match sqlx::query!("update rsstg_source set enabled = true where source_id = $1 and owner = $2",
			source_id, owner).execute(&mut self.pool.acquire().await?).await?.rows_affected() {
			source_id, owner).execute(&mut *self.pool.acquire().await?).await?.rows_affected() {
			1 => { Ok("Source enabled.") },
			0 => { Ok("Source not found.") },
			_ => { Err(anyhow!("Database error.")) },
		}
	}

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

		match sqlx::query!("update rsstg_source set enabled = false where source_id = $1 and owner = $2",
			source_id, owner).execute(&mut self.pool.acquire().await?).await?.rows_affected() {
			source_id, owner).execute(&mut *self.pool.acquire().await?).await?.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?;

		match match update {
				Some(id) => {
					sqlx::query!("update rsstg_source set channel_id = $2, url = $3, iv_hash = $4, owner = $5, channel = $6, url_re = $7 where source_id = $1",
						id, channel_id, url, iv_hash, owner, channel, url_re).execute(&mut self.pool.acquire().await?).await
						id, channel_id, url, iv_hash, owner, channel, url_re).execute(&mut *conn).await
				},
				None => {
					sqlx::query!("insert into rsstg_source (channel_id, url, iv_hash, owner, channel, url_re) values ($1, $2, $3, $4, $5, $6)",
						channel_id, url, iv_hash, owner, channel, url_re).execute(&mut self.pool.acquire().await?).await
						channel_id, url, iv_hash, owner, channel, url_re).execute(&mut *conn).await
				},
			} {
			Ok(_) => Ok(match update {
				Some(_) => "Channel updated.",
				None => "Channel added.",
			}),
			Err(sqlx::Error::Database(err)) => {
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		}
	}

	async fn autofetch(&self) -> Result<std::time::Duration> {
		let mut delay = chrono::Duration::minutes(1);
		let now = chrono::Local::now();
		let mut queue = sqlx::query!(r#"select source_id, next_fetch as "next_fetch: DateTime<chrono::Local>", owner from rsstg_order natural left join rsstg_source where next_fetch < now() + interval '1 minute';"#)
			.fetch_all(&mut self.pool.acquire().await?).await?;
			.fetch_all(&mut *self.pool.acquire().await?).await?;
		for row in queue.iter() {
			if let Some(next_fetch) = row.next_fetch {
				if next_fetch < now {
					if let (Some(owner), Some(source_id)) = (row.owner, row.source_id) {
						let clone = Core {
							owner_chat: telegram_bot::UserId::new(owner),
							..self.clone()
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