Add config system to read from file (#664)

Co-authored-by: Daniel Valentine <daniel@vielle.ws>
2023-01-03 04:55:22 -05:00 · 2023-01-03 04:55:22 -05:00 · 5b06a3fc64
commit 5b06a3fc64
parent 4817f51bc0
6 changed files with 272 additions and 43 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -10,9 +10,9 @@ checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"

 [[package]]
 name = "aho-corasick"
-version = "0.7.19"
+version = "0.7.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4f55bd91a0978cbfd91c457a164bab8b4001c833b7f323132c0a4e1922dd44e"
+checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
 dependencies = [
 "memchr",
 ]
@ -88,9 +88,9 @@ dependencies = [

 [[package]]
 name = "async-trait"
-version = "0.1.58"
+version = "0.1.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e805d94e6b5001b651426cf4cd446b1ab5f319d27bab5c644f61de0a804360c"
+checksum = "31e6e93155431f3931513b243d371981bb2770112b370c82745a1d19d2f99364"
 dependencies = [
 "proc-macro2",
 "quote",
@ -168,9 +168,9 @@ checksum = "572f695136211188308f16ad2ca5c851a712c464060ae6974944458eb83880ba"

 [[package]]
 name = "bytes"
-version = "1.2.1"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec8a7b6a70fde80372154c65702f00a0f56f3e1c36abbc6c440484be248856db"
+checksum = "dfb24e866b15a1af2a1b663f10c6b6b8f397a84aadb828f12e5b289ec23a3a3c"

 [[package]]
 name = "cached"
@ -211,9 +211,9 @@ checksum = "3a4f925191b4367301851c6d99b09890311d74b0d43f274c0b34c86d308a3663"

 [[package]]
 name = "cc"
-version = "1.0.76"
+version = "1.0.77"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76a284da2e6fe2092f2353e51713435363112dfd60030e22add80be333fb928f"
+checksum = "e9f73505338f7d905b19d18738976aae232eb46b8efc15554ffc56deb5d9ebe4"

 [[package]]
 name = "cfg-if"
@ -223,9 +223,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
 name = "clap"
-version = "4.0.24"
+version = "4.0.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60494cedb60cb47462c0ff7be53de32c0e42a6fc2c772184554fa12bd9489c03"
+checksum = "4d63b9e9c07271b9957ad22c173bae2a4d9a81127680962039296abcd2f8251d"
 dependencies = [
 "bitflags",
 "clap_lex",
@ -331,9 +331,9 @@ dependencies = [

 [[package]]
 name = "digest"
-version = "0.10.5"
+version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "adfbc57365a37acbd2ebf2b64d7e69bb766e2fea813521ed536f5d0520dcf86c"
+checksum = "8168378f4e5023e7218c89c891c0fd8ecdb5e5e4f18cb78f38cf245dd021e76f"
 dependencies = [
 "block-buffer",
 "crypto-common",
@ -363,6 +363,12 @@ dependencies = [
 "percent-encoding",
 ]

+[[package]]
+name = "fs_extra"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2022715d62ab30faffd124d40b76f4134a550a87792276512b18d63272333394"
+
 [[package]]
 name = "futures"
 version = "0.3.25"
@ -567,9 +573,9 @@ dependencies = [

 [[package]]
 name = "hyper-rustls"
-version = "0.23.0"
+version = "0.23.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d87c48c02e0dc5e3b849a2041db3029fd066650f8f717c07bf8ed78ccb895cac"
+checksum = "1788965e61b367cd03a62950836d5cd41560c3577d90e40e0819373194d1661c"
 dependencies = [
 "http",
 "hyper",
@ -598,9 +604,9 @@ dependencies = [

 [[package]]
 name = "indexmap"
-version = "1.9.1"
+version = "1.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
+checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
 dependencies = [
 "autocfg",
 "hashbrown",
@ -638,9 +644,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

 [[package]]
 name = "libc"
-version = "0.2.137"
+version = "0.2.138"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"
+checksum = "db6d7e329c562c5dfab7a46a2afabc8b987ab9a4834c9d1ca04dc54c1546cef8"

 [[package]]
 name = "libflate"
@ -682,10 +688,12 @@ dependencies = [
 "regex",
 "route-recognizer",
 "rust-embed",
+ "sealed_test",
 "serde",
 "serde_json",
 "time",
 "tokio",
+ "toml",
 "url",
 ]

@ -792,9 +800,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"

 [[package]]
 name = "os_str_bytes"
-version = "6.4.0"
+version = "6.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b5bf27447411e9ee3ff51186bf7a08e16c341efdde93f4d823e8844429bed7e"
+checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"

 [[package]]
 name = "parking"
@ -814,9 +822,9 @@ dependencies = [

 [[package]]
 name = "parking_lot_core"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dc9e0dc2adc1c69d09143aff38d3d30c5c3f0df0dad82e6d25547af174ebec0"
+checksum = "7ff9f3fef3968a3ec5945535ed654cb38ff72d7495a25619e2247fb15a2ed9ba"
 dependencies = [
 "cfg-if",
 "libc",
@ -858,6 +866,12 @@ dependencies = [
 "unicode-ident",
 ]

+[[package]]
+name = "quick-error"
+version = "1.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
+
 [[package]]
 name = "quote"
 version = "1.0.21"
@ -923,6 +937,15 @@ version = "0.6.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"

+[[package]]
+name = "remove_dir_all"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "ring"
 version = "0.16.20"
@ -1018,6 +1041,18 @@ dependencies = [
 "base64",
 ]

+[[package]]
+name = "rusty-forkfork"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ce85af4dfa2fb0c0143121ab5e424c71ea693867357c9159b8777b59984c218"
+dependencies = [
+ "fnv",
+ "quick-error",
+ "tempfile",
+ "wait-timeout",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.11"
@ -1059,6 +1094,28 @@ dependencies = [
 "untrusted",
 ]

+[[package]]
+name = "sealed_test"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a608d94641cc17fe203b102db2ae86d47a236630192f0244ddbbbb0044c0272"
+dependencies = [
+ "fs_extra",
+ "rusty-forkfork",
+ "sealed_test_derive",
+ "tempfile",
+]
+
+[[package]]
+name = "sealed_test_derive"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b672e005ae58fef5da619d90b9f1c5b44b061890f4a371b3c96257a8a15e697"
+dependencies = [
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "security-framework"
 version = "2.7.0"
@ -1084,18 +1141,18 @@ dependencies = [

 [[package]]
 name = "serde"
-version = "1.0.147"
+version = "1.0.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"
+checksum = "256b9932320c590e707b94576e3cc1f7c9024d0ee6612dfbcf1cb106cbe8e055"
 dependencies = [
 "serde_derive",
 ]

 [[package]]
 name = "serde_derive"
-version = "1.0.147"
+version = "1.0.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f1d362ca8fc9c3e3a7484440752472d68a6caa98f1ab81d99b5dfe517cec852"
+checksum = "b4eae9b04cbffdfd550eb462ed33bc6a1b68c935127d008b27444d08380f94e4"
 dependencies = [
 "proc-macro2",
 "quote",
@ -1104,9 +1161,9 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.87"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ce777b7b150d76b9cf60d28b55f5847135a003f7d7350c6be7a773508ce7d45"
+checksum = "020ff22c755c2ed3f8cf162dbb41a7268d934702f3ed3631656ea597e08fc3db"
 dependencies = [
 "itoa",
 "ryu",
@ -1172,15 +1229,29 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"

 [[package]]
 name = "syn"
-version = "1.0.103"
+version = "1.0.105"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a864042229133ada95abf3b54fdc62ef5ccabe9515b64717bcb9a1919e59445d"
+checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
 dependencies = [
 "proc-macro2",
 "quote",
 "unicode-ident",
 ]

+[[package]]
+name = "tempfile"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "libc",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.37"
@ -1245,9 +1316,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"

 [[package]]
 name = "tokio"
-version = "1.21.2"
+version = "1.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9e03c497dc955702ba729190dc4aac6f2a0ce97f913e5b1b5912fc5039d9099"
+checksum = "eab6d665857cc6ca78d6e80303a02cea7a7851e85dfbd77cbdc09bd129f1ef46"
 dependencies = [
 "autocfg",
 "bytes",
@ -1260,14 +1331,14 @@ dependencies = [
 "signal-hook-registry",
 "socket2",
 "tokio-macros",
- "winapi",
+ "windows-sys 0.42.0",
 ]

 [[package]]
 name = "tokio-macros"
-version = "1.8.0"
+version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
+checksum = "d266c00fde287f55d3f1c3e96c500c362a2b8c695076ec180f27918820bc6df8"
 dependencies = [
 "proc-macro2",
 "quote",
@ -1299,6 +1370,15 @@ dependencies = [
 "tracing",
 ]

+[[package]]
+name = "toml"
+version = "0.5.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d82e1a7758622a465f8cee077614c73484dac5b836c02ff6a40d5d1010324d7"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "tower-service"
 version = "0.3.2"
@ -1333,9 +1413,9 @@ checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"

 [[package]]
 name = "typenum"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
+checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"

 [[package]]
 name = "unicase"
@ -1390,6 +1470,15 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"

+[[package]]
+name = "wait-timeout"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "waker-fn"
 version = "1.1.0"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -27,10 +27,12 @@ url = "2.3.1"
 rust-embed = { version = "6.4.2", features = ["include-exclude"] }
 libflate = "1.2.0"
 brotli = { version = "3.3.4", features = ["std"] }
+toml = "0.5.9"
 once_cell = "1.16.0"

 [dev-dependencies]
 lipsum = "0.8.2"
+sealed_test = "1.0.0"

 [profile.release]
 codegen-units = 1
--- a/README.md
+++ b/README.md
@ -208,6 +208,13 @@ Assign a default value for each user-modifiable setting by passing environment v
 | `HIDE_HLS_NOTIFICATION` | `["on", "off"]`                                                                                     | `off`         |
 | `AUTOPLAY_VIDEOS`       | `["on", "off"]`                                                                                     | `off`         |

+You can also configure Libreddit with a configuration file. An example `libreddit.toml` can be found below:
+
+```toml
+LIBREDDIT_DEFAULT_WIDE = "on"
+LIBREDDIT_DEFAULT_USE_HLS = "on"
+```
+
 ### Examples

 ```bash
--- a/src/config.rs
+++ b/src/config.rs
@ -0,0 +1,130 @@
+use once_cell::sync::Lazy;
+use std::{env::var, fs::read_to_string};
+
+// Waiting for https://github.com/rust-lang/rust/issues/74465 to land, so we
+// can reduce reliance on once_cell.
+//
+// This is the local static that is initialized at runtime (technically at
+// first request) and contains the instance settings.
+static CONFIG: Lazy<Config> = Lazy::new(Config::load);
+
+/// Stores the configuration parsed from the environment variables and the
+/// config file. `Config::Default()` contains None for each setting.
+#[derive(Default, serde::Deserialize)]
+pub struct Config {
+	#[serde(rename = "LIBREDDIT_SFW_ONLY")]
+	sfw_only: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_THEME")]
+	default_theme: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_FRONT_PAGE")]
+	default_front_page: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_LAYOUT")]
+	default_layout: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_WIDE")]
+	default_wide: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_COMMENT_SORT")]
+	default_comment_sort: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_POST_SORT")]
+	default_post_sort: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_SHOW_NSFW")]
+	default_show_nsfw: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_BLUR_NSFW")]
+	default_blur_nsfw: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_USE_HLS")]
+	default_use_hls: Option<String>,
+
+	#[serde(rename = "LIBREDDIT_DEFAULT_HIDE_HLS_NOTIFICATION")]
+	default_hide_hls_notification: Option<String>,
+}
+
+impl Config {
+	/// Load the configuration from the environment variables and the config file.
+	/// In the case that there are no environment variables set and there is no
+	/// config file, this function returns a Config that contains all None values.
+	pub fn load() -> Self {
+		// Read from libreddit.toml config file. If for any reason, it fails, the
+		// default `Config` is used (all None values)
+		let config: Config = toml::from_str(&read_to_string("libreddit.toml").unwrap_or_default()).unwrap_or_default();
+		// This function defines the order of preference - first check for
+		// environment variables with "LIBREDDIT", then check the config, then if
+		// both are `None`, return a `None` via the `map_or_else` function
+		let parse = |key: &str| -> Option<String> { var(key).ok().map_or_else(|| get_setting_from_config(key, &config), Some) };
+		Self {
+			sfw_only: parse("LIBREDDIT_SFW_ONLY"),
+			default_theme: parse("LIBREDDIT_DEFAULT_THEME"),
+			default_front_page: parse("LIBREDDIT_DEFAULT_FRONT_PAGE"),
+			default_layout: parse("LIBREDDIT_DEFAULT_LAYOUT"),
+			default_post_sort: parse("LIBREDDIT_DEFAULT_POST_SORT"),
+			default_wide: parse("LIBREDDIT_DEFAULT_WIDE"),
+			default_comment_sort: parse("LIBREDDIT_DEFAULT_COMMENT_SORT"),
+			default_show_nsfw: parse("LIBREDDIT_DEFAULT_SHOW_NSFW"),
+			default_blur_nsfw: parse("LIBREDDIT_DEFAULT_BLUR_NSFW"),
+			default_use_hls: parse("LIBREDDIT_DEFAULT_USE_HLS"),
+			default_hide_hls_notification: parse("LIBREDDIT_DEFAULT_HIDE_HLS"),
+		}
+	}
+}
+
+fn get_setting_from_config(name: &str, config: &Config) -> Option<String> {
+	match name {
+		"LIBREDDIT_SFW_ONLY" => config.sfw_only.clone(),
+		"LIBREDDIT_DEFAULT_THEME" => config.default_theme.clone(),
+		"LIBREDDIT_DEFAULT_FRONT_PAGE" => config.default_front_page.clone(),
+		"LIBREDDIT_DEFAULT_LAYOUT" => config.default_layout.clone(),
+		"LIBREDDIT_DEFAULT_COMMENT_SORT" => config.default_comment_sort.clone(),
+		"LIBREDDIT_DEFAULT_POST_SORT" => config.default_post_sort.clone(),
+		"LIBREDDIT_DEFAULT_SHOW_NSFW" => config.default_show_nsfw.clone(),
+		"LIBREDDIT_DEFAULT_BLUR_NSFW" => config.default_blur_nsfw.clone(),
+		"LIBREDDIT_DEFAULT_USE_HLS" => config.default_use_hls.clone(),
+		"LIBREDDIT_DEFAULT_HIDE_HLS_NOTIFICATION" => config.default_hide_hls_notification.clone(),
+		"LIBREDDIT_DEFAULT_WIDE" => config.default_wide.clone(),
+		_ => None,
+	}
+}
+
+/// Retrieves setting from environment variable or config file.
+pub(crate) fn get_setting(name: &str) -> Option<String> {
+	get_setting_from_config(name, &CONFIG)
+}
+
+#[cfg(test)]
+use {sealed_test::prelude::*, std::fs::write};
+
+#[test]
+#[sealed_test(env = [("LIBREDDIT_SFW_ONLY", "1")])]
+fn test_env_var() {
+	assert!(crate::utils::sfw_only())
+}
+
+#[test]
+#[sealed_test]
+fn test_config() {
+	let config_to_write = r#"LIBREDDIT_DEFAULT_COMMENT_SORT = "best""#;
+	write("libreddit.toml", config_to_write).unwrap();
+	assert_eq!(get_setting("LIBREDDIT_DEFAULT_COMMENT_SORT"), Some("best".into()));
+}
+
+#[test]
+#[sealed_test(env = [("LIBREDDIT_DEFAULT_COMMENT_SORT", "top")])]
+fn test_env_config_precedence() {
+	let config_to_write = r#"LIBREDDIT_DEFAULT_COMMENT_SORT = "best""#;
+	write("libreddit.toml", config_to_write).unwrap();
+	assert_eq!(get_setting("LIBREDDIT_DEFAULT_COMMENT_SORT"), Some("top".into()))
+}
+
+#[test]
+#[sealed_test(env = [("LIBREDDIT_DEFAULT_COMMENT_SORT", "top")])]
+fn test_alt_env_config_precedence() {
+	let config_to_write = r#"LIBREDDIT_DEFAULT_COMMENT_SORT = "best""#;
+	write("libreddit.toml", config_to_write).unwrap();
+	assert_eq!(get_setting("LIBREDDIT_DEFAULT_COMMENT_SORT"), Some("top".into()))
+}
--- a/src/main.rs
+++ b/src/main.rs
@ -3,6 +3,7 @@
 #![allow(clippy::cmp_owned)]

 // Reference local files
+mod config;
 mod duplicates;
 mod post;
 mod search;
--- a/src/utils.rs
+++ b/src/utils.rs
@ -680,8 +680,8 @@ pub fn setting(req: &Request<Body>, name: &str) -> String {
 	req
 		.cookie(name)
 		.unwrap_or_else(|| {
-			// If there is no cookie for this setting, try receiving a default from an environment variable
-			if let Ok(default) = std::env::var(format!("LIBREDDIT_DEFAULT_{}", name.to_uppercase())) {
+			// If there is no cookie for this setting, try receiving a default from the config
+			if let Some(default) = crate::config::get_setting(&format!("LIBREDDIT_DEFAULT_{}", name.to_uppercase())) {
 				Cookie::new(name, default)
 			} else {
 				Cookie::named(name)
@ -866,7 +866,7 @@ pub async fn error(req: Request<Body>, msg: impl ToString) -> Result<Response<Bo
 	Ok(Response::builder().status(404).header("content-type", "text/html").body(body.into()).unwrap_or_default())
 }

-/// Returns true if the environment variable `LIBREDDIT_SFW_ONLY` carries the
+/// Returns true if the config/env variable `LIBREDDIT_SFW_ONLY` carries the
 /// value `on`.
 ///
 /// If this variable is set as such, the instance will operate in SFW-only
@ -874,9 +874,9 @@ pub async fn error(req: Request<Body>, msg: impl ToString) -> Result<Response<Bo
 /// subreddits or posts or userpages for users Reddit has deemed NSFW will
 /// be denied.
 pub fn sfw_only() -> bool {
-	match env::var("LIBREDDIT_SFW_ONLY") {
-		Ok(val) => val == "on",
-		Err(_) => false,
+	match crate::config::get_setting("LIBREDDIT_SFW_ONLY") {
+		Some(val) => val == "on",
+		None => false,
 	}
 }