use crate::{ error::LemmyError, location_info, settings::structs::{PictrsConfig, Settings}, }; use anyhow::{anyhow, Context}; use deser_hjson::from_str; use once_cell::sync::Lazy; use regex::{Regex, RegexBuilder}; use std::{env, fs, io::Error, sync::RwLock}; pub mod structs; static DEFAULT_CONFIG_FILE: &str = "config/config.hjson"; static SETTINGS: Lazy> = Lazy::new(|| RwLock::new(Settings::init().expect("Failed to load settings file"))); static WEBFINGER_REGEX: Lazy = Lazy::new(|| { Regex::new(&format!( "^acct:([a-zA-Z0-9_]{{3,}})@{}$", Settings::get().hostname )) .expect("compile webfinger regex") }); impl Settings { /// Reads config from configuration file. /// /// Note: The env var `LEMMY_DATABASE_URL` is parsed in /// `lemmy_db_schema/src/lib.rs::get_database_url_from_env()` /// Warning: Only call this once. pub fn init() -> Result { // Read the config file let config = from_str::(&Self::read_config_file()?)?; if config.hostname == "unset" { return Err(anyhow!("Hostname variable is not set!").into()); } Ok(config) } /// Returns the config as a struct. pub fn get() -> Self { SETTINGS.read().expect("read config").to_owned() } pub fn get_database_url(&self) -> String { let conf = &self.database; format!( "postgres://{}:{}@{}:{}/{}", conf.user, conf.password, conf.host, conf.port, conf.database, ) } pub fn get_config_location() -> String { env::var("LEMMY_CONFIG_LOCATION").unwrap_or_else(|_| DEFAULT_CONFIG_FILE.to_string()) } pub fn read_config_file() -> Result { fs::read_to_string(Self::get_config_location()) } /// Returns either "http" or "https", depending on tls_enabled setting pub fn get_protocol_string(&self) -> &'static str { if self.tls_enabled { "https" } else { "http" } } /// Returns something like `http://localhost` or `https://lemmy.ml`, /// with the correct protocol and hostname. pub fn get_protocol_and_hostname(&self) -> String { format!("{}://{}", self.get_protocol_string(), self.hostname) } /// When running the federation test setup in `api_tests/` or `docker/federation`, the `hostname` /// variable will be like `lemmy-alpha:8541`. This method removes the port and returns /// `lemmy-alpha` instead. It has no effect in production. pub fn get_hostname_without_port(&self) -> Result { Ok( self .hostname .split(':') .collect::>() .first() .context(location_info!())? .to_string(), ) } pub fn save_config_file(data: &str) -> Result { // check that the config is valid from_str::(data)?; fs::write(Settings::get_config_location(), data)?; // Reload the new settings // From https://stackoverflow.com/questions/29654927/how-do-i-assign-a-string-to-a-mutable-static-variable/47181804#47181804 let mut new_settings = SETTINGS.write().expect("write config"); *new_settings = match Settings::init() { Ok(c) => c, Err(e) => panic!("{}", e), }; Ok(Self::read_config_file()?) } pub fn webfinger_regex(&self) -> Regex { WEBFINGER_REGEX.to_owned() } pub fn slur_regex(&self) -> Option { self.slur_filter.as_ref().map(|slurs| { RegexBuilder::new(slurs) .case_insensitive(true) .build() .expect("compile regex") }) } pub fn pictrs_config(&self) -> Result { self .pictrs_config .to_owned() .ok_or_else(|| anyhow!("images_disabled").into()) } }