lemmy/crates/db_schema/src/lib.rs

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#[macro_use]
extern crate diesel;
#[macro_use]
extern crate diesel_derive_newtype;
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// this is used in tests
#[allow(unused_imports)]
#[macro_use]
extern crate diesel_migrations;
#[macro_use]
extern crate strum_macros;
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pub mod aggregates;
pub mod impls;
pub mod newtypes;
pub mod schema;
pub mod source;
pub mod traits;
pub type DbPool = diesel::r2d2::Pool<diesel::r2d2::ConnectionManager<diesel::PgConnection>>;
use crate::newtypes::DbUrl;
use chrono::NaiveDateTime;
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use diesel::{Connection, PgConnection};
use lemmy_utils::LemmyError;
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use once_cell::sync::Lazy;
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use regex::Regex;
use serde::{Deserialize, Serialize};
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use std::{env, env::VarError};
use url::Url;
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pub fn get_database_url_from_env() -> Result<String, VarError> {
env::var("LEMMY_DATABASE_URL")
}
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#[derive(EnumString, Display, Debug, Serialize, Deserialize, Clone, Copy)]
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pub enum SortType {
Active,
Hot,
New,
TopDay,
TopWeek,
TopMonth,
TopYear,
TopAll,
MostComments,
NewComments,
}
#[derive(EnumString, Display, Debug, Serialize, Deserialize, Clone, Copy, PartialEq)]
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pub enum ListingType {
All,
Local,
Subscribed,
Community,
}
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#[derive(EnumString, Display, Debug, Serialize, Deserialize, Clone, Copy)]
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pub enum SearchType {
All,
Comments,
Posts,
Communities,
Users,
Url,
}
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pub fn from_opt_str_to_opt_enum<T: std::str::FromStr>(opt: &Option<String>) -> Option<T> {
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opt.as_ref().and_then(|t| T::from_str(t).ok())
}
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pub fn fuzzy_search(q: &str) -> String {
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let replaced = q.replace('%', "\\%").replace('_', "\\_").replace(' ', "%");
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format!("%{}%", replaced)
}
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pub fn limit_and_offset(page: Option<i64>, limit: Option<i64>) -> (i64, i64) {
let page = page.unwrap_or(1);
let limit = limit.unwrap_or(10);
let offset = limit * (page - 1);
(limit, offset)
}
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pub fn is_email_regex(test: &str) -> bool {
EMAIL_REGEX.is_match(test)
}
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pub fn diesel_option_overwrite(opt: &Option<String>) -> Option<Option<String>> {
match opt {
// An empty string is an erase
Some(unwrapped) => {
if !unwrapped.eq("") {
Some(Some(unwrapped.to_owned()))
} else {
Some(None)
}
}
None => None,
}
}
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pub fn diesel_option_overwrite_to_url(
opt: &Option<String>,
) -> Result<Option<Option<DbUrl>>, LemmyError> {
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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")),
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},
None => Ok(None),
}
}
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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
}
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pub fn naive_now() -> NaiveDateTime {
chrono::prelude::Utc::now().naive_utc()
}
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static EMAIL_REGEX: Lazy<Regex> = Lazy::new(|| {
Regex::new(r"^[a-zA-Z0-9.!#$%&*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$")
.expect("compile email regex")
});
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pub mod functions {
use diesel::sql_types::*;
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sql_function! {
fn hot_rank(score: BigInt, time: Timestamp) -> Integer;
}
sql_function!(fn lower(x: Text) -> Text);
}
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#[cfg(test)]
mod tests {
use super::{fuzzy_search, *};
use crate::is_email_regex;
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#[test]
fn test_fuzzy_search() {
let test = "This %is% _a_ fuzzy search";
assert_eq!(
fuzzy_search(test),
"%This%\\%is\\%%\\_a\\_%fuzzy%search%".to_string()
);
}
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#[test]
fn test_email() {
assert!(is_email_regex("gush@gmail.com"));
assert!(!is_email_regex("nada_neutho"));
}
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#[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()))
);
}
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#[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()
));
}
}