use crate::newtypes::DbUrl; use activitypub_federation::{core::object_id::ObjectId, traits::ApubObject}; use chrono::NaiveDateTime; use diesel::{ backend::Backend, deserialize::FromSql, result::Error::QueryBuilderError, serialize::{Output, ToSql}, sql_types::Text, Connection, PgConnection, }; use lemmy_utils::error::LemmyError; use once_cell::sync::Lazy; use regex::Regex; use std::{env, env::VarError, io::Write}; use url::Url; const FETCH_LIMIT_DEFAULT: i64 = 10; pub const FETCH_LIMIT_MAX: i64 = 50; pub type DbPool = diesel::r2d2::Pool>; pub fn get_database_url_from_env() -> Result { env::var("LEMMY_DATABASE_URL") } pub fn fuzzy_search(q: &str) -> String { let replaced = q.replace('%', "\\%").replace('_', "\\_").replace(' ', "%"); format!("%{}%", replaced) } pub fn limit_and_offset( page: Option, limit: Option, ) -> Result<(i64, i64), diesel::result::Error> { let page = match page { Some(page) => { if page < 1 { return Err(QueryBuilderError("Page is < 1".into())); } else { page } } None => 1, }; let limit = match limit { Some(limit) => { if !(1..=FETCH_LIMIT_MAX).contains(&limit) { return Err(QueryBuilderError( format!("Fetch limit is > {}", FETCH_LIMIT_MAX).into(), )); } else { limit } } None => FETCH_LIMIT_DEFAULT, }; let offset = limit * (page - 1); Ok((limit, offset)) } pub fn limit_and_offset_unlimited(page: Option, limit: Option) -> (i64, i64) { let limit = limit.unwrap_or(FETCH_LIMIT_DEFAULT); let offset = limit * (page.unwrap_or(1) - 1); (limit, offset) } pub fn is_email_regex(test: &str) -> bool { EMAIL_REGEX.is_match(test) } pub fn diesel_option_overwrite(opt: &Option) -> Option> { match opt { // An empty string is an erase Some(unwrapped) => { if !unwrapped.eq("") { Some(Some(unwrapped.to_owned())) } else { Some(None) } } None => None, } } pub fn diesel_option_overwrite_to_url( opt: &Option, ) -> Result>, LemmyError> { match opt.as_ref().map(|s| s.as_str()) { // An empty string is an erase Some("") => Ok(Some(None)), Some(str_url) => match Url::parse(str_url) { Ok(url) => Ok(Some(Some(url.into()))), Err(e) => Err(LemmyError::from_error_message(e, "invalid_url")), }, None => Ok(None), } } embed_migrations!(); pub fn establish_unpooled_connection() -> PgConnection { let db_url = match get_database_url_from_env() { Ok(url) => url, Err(e) => panic!( "Failed to read database URL from env var LEMMY_DATABASE_URL: {}", e ), }; let conn = PgConnection::establish(&db_url).unwrap_or_else(|_| panic!("Error connecting to {}", db_url)); embedded_migrations::run(&conn).expect("load migrations"); conn } pub fn naive_now() -> NaiveDateTime { chrono::prelude::Utc::now().naive_utc() } static EMAIL_REGEX: Lazy = Lazy::new(|| { Regex::new(r"^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$") .expect("compile email regex") }); pub mod functions { use diesel::sql_types::*; sql_function! { fn hot_rank(score: BigInt, time: Timestamp) -> Integer; } sql_function!(fn lower(x: Text) -> Text); } impl ToSql for DbUrl where String: ToSql, { fn to_sql(&self, out: &mut Output) -> diesel::serialize::Result { self.0.to_string().to_sql(out) } } impl FromSql for DbUrl where String: FromSql, { fn from_sql(bytes: Option<&DB::RawValue>) -> diesel::deserialize::Result { let str = String::from_sql(bytes)?; Ok(DbUrl(Url::parse(&str)?)) } } impl From> for DbUrl where Kind: ApubObject + Send + 'static, for<'de2> ::ApubType: serde::Deserialize<'de2>, { fn from(id: ObjectId) -> Self { DbUrl(id.into()) } } #[cfg(test)] mod tests { use super::{fuzzy_search, *}; use crate::utils::is_email_regex; #[test] fn test_fuzzy_search() { let test = "This %is% _a_ fuzzy search"; assert_eq!( fuzzy_search(test), "%This%\\%is\\%%\\_a\\_%fuzzy%search%".to_string() ); } #[test] fn test_email() { assert!(is_email_regex("gush@gmail.com")); assert!(!is_email_regex("nada_neutho")); } #[test] fn test_diesel_option_overwrite() { assert_eq!(diesel_option_overwrite(&None), None); assert_eq!(diesel_option_overwrite(&Some("".to_string())), Some(None)); assert_eq!( diesel_option_overwrite(&Some("test".to_string())), Some(Some("test".to_string())) ); } #[test] fn test_diesel_option_overwrite_to_url() { assert!(matches!(diesel_option_overwrite_to_url(&None), Ok(None))); assert!(matches!( diesel_option_overwrite_to_url(&Some("".to_string())), Ok(Some(None)) )); assert!(matches!( diesel_option_overwrite_to_url(&Some("invalid_url".to_string())), Err(_) )); let example_url = "https://example.com"; assert!(matches!( diesel_option_overwrite_to_url(&Some(example_url.to_string())), Ok(Some(Some(url))) if url == Url::parse(example_url).unwrap().into() )); } }