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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cc6dde6e4ed435a4c1ee4e73592f5ba9da2151af10076cc04858746af9352d09"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "atoi"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d7c57d12312ff59c811c0643f4d80830505833c9ffaebd193d819392b265be8e"

name = "bytes"
version = "1.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"

[[package]]
name = "cc"
version = "1.0.79"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"




[[package]]
name = "cfg-if"
version = "0.1.10"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"

name = "futures-macro"
version = "0.3.28"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "futures-rustls"
version = "0.22.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d2411eed028cdf8c8034eaf21f9915f956b6c3abec4d4c7949ee67f0721127bd"

name = "linux-raw-sys"
version = "0.3.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ef53942eb7bf7ff43a617b3e2c1c4a5ecf5944a7c1bc12d7ee39bbb15e5c1519"

[[package]]
name = "linux-raw-sys"
version = "0.4.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "09fc20d2ca12cb9f044c93e3bd6d32d523e6e2ec3db4f7b2939cd99026ecd3f0"

[[package]]
name = "lock_api"
version = "0.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c4da24a77a3d8a6d4862d95f72e6fdb9c09a643ecdb402d754004a557f2bec75"
dependencies = [

name = "openssl-macros"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "openssl-probe"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"

name = "pin-project-internal"
version = "1.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ec2e072ecce94ec471b13398d5402c188e76ac03cf74dd1a975161b23a3f6d9c"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "pin-project-lite"
version = "0.2.10"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4c40d25201921e5ff0c862a505c6557ea88568a4e3ace775ab55e93f2f4f9d57"

 "libc",
 "linux-raw-sys 0.3.8",
 "windows-sys",
]

[[package]]
name = "rustix"
version = "0.38.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0a962918ea88d644592894bc6dc55acc6c0956488adcebbfb6e273506b7fd6e5"
dependencies = [
 "bitflags 2.3.3",
 "errno",
 "libc",
 "linux-raw-sys 0.4.3",
 "windows-sys",
]

[[package]]
name = "rustls"
version = "0.20.8"
source = "registry+https://github.com/rust-lang/crates.io-index"

name = "semver-parser"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"

[[package]]
name = "serde"
version = "1.0.178"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "60363bdd39a7be0266a520dab25fdc9241d2f987b08a01e01f0ec6d06a981348"
dependencies = [
 "serde_derive",
]

[[package]]
name = "serde-value"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f3a1a3341211875ef120e117ea7fd5228530ae7e7036a779fdc9117be6b3282c"
dependencies = [
 "ordered-float",
 "serde",
]

[[package]]
name = "serde_derive"
version = "1.0.178"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f28482318d6641454cb273da158647922d1be6b5a2fcc6165cd89ebdd7ed576b"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "serde_json"
version = "1.0.104"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "076066c5f1078eac5b722a31827a8832fe108bed65dfa75e233c89f8206e976c"

 "proc-macro2",
 "quote",
 "unicode-ident",
]

[[package]]
name = "syn"
version = "2.0.27"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b60f673f44a8255b9c8c657daf66a596d435f2da81a555b06dc644d080ba45e0"
dependencies = [
 "proc-macro2",
 "quote",
 "unicode-ident",
]

[[package]]

version = "3.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5486094ee78b2e5038a6382ed7645bc084dc2ec433426ca4c3cb61e2007b8998"
dependencies = [
 "cfg-if 1.0.0",
 "fastrand 2.0.0",
 "redox_syscall 0.3.5",
 "rustix 0.38.4",
 "windows-sys",
]

[[package]]
name = "thiserror"
version = "1.0.44"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "611040a08a0439f8248d1990b111c95baa9c704c805fa1f62104b39655fd7f90"
dependencies = [
 "thiserror-impl",
]

[[package]]
name = "thiserror-impl"
version = "1.0.44"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "090198534930841fab3a5d1bb637cde49e339654e606195f8d9c76eeb081dc96"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "time"
version = "0.1.45"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"

name = "tracing-attributes"
version = "0.1.26"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5f4f31f56159e98206da9efd823404b79b6ef3143b4a7ab76e67b1751b25a4ab"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
]

[[package]]
name = "tracing-core"
version = "0.1.31"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0955b8137a1df6f1a2e9a37d8a6656291ff0297c1a97c24e0d8425fe2312f79a"

checksum = "5ef2b6d3c510e9625e5fe6f509ab07d66a760f0885d858736483c32ed7809abd"
dependencies = [
 "bumpalo",
 "log",
 "once_cell",
 "proc-macro2",
 "quote",
 "syn 2.0.27",
 "wasm-bindgen-shared",
]

[[package]]
name = "wasm-bindgen-futures"
version = "0.4.37"
source = "registry+https://github.com/rust-lang/crates.io-index"

name = "wasm-bindgen-macro-support"
version = "0.2.87"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
dependencies = [
 "proc-macro2",
 "quote",
 "syn 2.0.27",
 "wasm-bindgen-backend",
 "wasm-bindgen-shared",
]

[[package]]
name = "wasm-bindgen-shared"
version = "0.2.87"

[package]
name = "rsstg"
version = "0.2.18"
authors = ["arcade"]
edition = "2021"

[dependencies]
anyhow = "*"
async-std = { version = "*", features = [ "tokio1" ] }
atom_syndication = { version = "*", features = [ "with-serde" ] }

use anyhow::{anyhow, bail, Context, Result};
use async_std::task;
use chrono::DateTime;
use sqlx::{
	postgres::PgPoolOptions,
	Row,
};
use std::{
	borrow::Cow,
	collections::{
		BTreeMap,
		HashSet,
	},
	sync::{Arc, Mutex},

					set.insert(id.clone());
					id.clone()
				},
			}
		};
		let count = Arc::strong_count(&id);
		if count == 2 {
			let mut conn = self.pool.acquire().await
				.with_context(|| format!("Query queue fetch conn:\n{:?}", &self.pool))?;
			let row = sqlx::query("select source_id, channel_id, url, iv_hash, owner, url_re from rsstg_source where source_id = $1 and owner = $2")
				.bind(*id)
				.bind(owner)
				.fetch_one(&mut conn).await
				.with_context(|| format!("Query source:\n{:?}", &self.pool))?;
			drop(conn);

			let channel_id: i64 = row.try_get("channel_id")?;
			let url: &str = row.try_get("url")?;
			let iv_hash: Option<&str> = row.try_get("iv_hash")?;
			let url_re = match row.try_get("url_re")? {
				Some(x) => Some(sedregex::ReplaceCommand::new(x)?),
				None => None,
			};
			let destination = match real {
				true => telegram_bot::UserId::new(channel_id),
				false => telegram_bot::UserId::new(row.try_get("owner")?),
			};
			let mut this_fetch: Option<DateTime<chrono::FixedOffset>> = None;
			let mut posts: BTreeMap<DateTime<chrono::FixedOffset>, String> = BTreeMap::new();

			let response = self.http_client.get(url).send().await?;
			let status = response.status();
			let content = response.bytes().await?;
			match rss::Channel::read_from(&content[..]) {
				Ok(feed) => {
					for item in feed.items() {
						if let Some(link) = item.link() {
							let date = match item.pub_date() {
								Some(feed_date) => DateTime::parse_from_rfc2822(feed_date),
								None => DateTime::parse_from_rfc3339(&item.dublin_core_ext().unwrap().dates()[0]),
							}?;
							let url = link;
							posts.insert(date, url.to_string());
						}
					};
				},
				Err(err) => match err {
					rss::Error::InvalidStartTag => {
						let feed = atom_syndication::Feed::read_from(&content[..])
							.with_context(|| format!("Problem opening feed url:\n{}\n{}", &url, status))?;
						for item in feed.entries() {
							let date = item.published().unwrap();
							let url = item.links()[0].href();
							posts.insert(*date, url.to_string());
						};
					},
					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),
					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.is_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);
					task::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();

		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Enable fetch conn:\n{:?}", &self.pool))?;
		match sqlx::query("update rsstg_source set enabled = true where source_id = $1 and owner = $2")
			.bind(source_id)
			.bind(owner)
			.execute(&mut conn).await
			.with_context(|| format!("Enable source:\n{:?}", &self.pool))?
			.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();

		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Disable fetch conn:\n{:?}", &self.pool))?;
		match sqlx::query("update rsstg_source set enabled = false where source_id = $1 and owner = $2")
			.bind(source_id)
			.bind(owner)
			.execute(&mut conn).await
			.with_context(|| format!("Disable source:\n{:?}", &self.pool))?
			.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 {
				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").bind(id)

				},
				None => {
					sqlx::query("insert into rsstg_source (channel_id, url, iv_hash, owner, channel, url_re) values ($1, $2, $3, $4, $5, $6)")

				},
			}
			.bind(channel_id)
			.bind(url)
			.bind(iv_hash)
			.bind(owner)
			.bind(channel)
			.bind(url_re)
			.execute(&mut conn).await {
			Ok(_) => 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", ) => {

				bail!("Sorry, unknown error:\n{:#?}\n", err);
			},
		}
	}

	async fn autofetch(&self) -> Result<std::time::Duration> {
		let mut delay = chrono::Duration::minutes(1);
		let mut conn = self.pool.acquire().await
			.with_context(|| format!("Autofetch fetch conn:\n{:?}", &self.pool))?;
		let now = chrono::Local::now();
		let mut queue = sqlx::query("select source_id, next_fetch, owner from rsstg_order natural left join rsstg_source where next_fetch < now() + interval '1 minute';")
			.fetch_all(&mut conn).await?;
		for row in queue.iter() {
			let source_id: i32 = row.try_get("source_id")?;
			let owner: i64 = row.try_get("owner")?;
			let next_fetch: DateTime<chrono::Local> = row.try_get("next_fetch")?;
			if next_fetch < now {

				let clone = Core {
					owner_chat: telegram_bot::UserId::new(owner),
					..self.clone()
				};
				task::spawn(async move {
					if let Err(err) = clone.check(&source_id, owner, true).await {
						if let Err(err) = clone.send(&format!("🛑 {:?}", err), None, None).await {
							eprintln!("Check error: {}", err);
						};
					};
				});

			} else if next_fetch - now < delay {
				delay = next_fetch - now;

			}
		};
		queue.clear();
		Ok(delay.to_std()?)
	}

	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"))
	}
}