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use regex::Regex;
use serde_derive::{Deserialize, Serialize};
use std::time::Duration;
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(default, rename_all = "kebab-case")]
pub struct Config {
pub follow_web_links: bool,
pub traverse_parent_directories: bool,
#[serde(with = "regex_serde")]
pub exclude: Vec<Regex>,
#[serde(default = "default_user_agent")]
pub user_agent: String,
#[serde(default = "default_cache_timeout")]
pub cache_timeout: u64,
#[serde(default)]
pub warning_policy: WarningPolicy,
}
impl Config {
pub const DEFAULT_CACHE_TIMEOUT: Duration =
Duration::from_secs(60 * 60 * 12);
pub const DEFAULT_USER_AGENT: &'static str =
concat!(env!("CARGO_PKG_NAME"), "-", env!("CARGO_PKG_VERSION"));
pub fn should_skip(&self, link: &str) -> bool {
self.exclude.iter().any(|pat| pat.find(link).is_some())
}
}
impl Default for Config {
fn default() -> Config {
Config {
follow_web_links: false,
traverse_parent_directories: false,
exclude: Vec::new(),
user_agent: default_user_agent(),
warning_policy: WarningPolicy::Warn,
cache_timeout: Config::DEFAULT_CACHE_TIMEOUT.as_secs(),
}
}
}
fn default_cache_timeout() -> u64 { Config::DEFAULT_CACHE_TIMEOUT.as_secs() }
fn default_user_agent() -> String { Config::DEFAULT_USER_AGENT.to_string() }
mod regex_serde {
use regex::Regex;
use serde::{
de::{Deserialize, Deserializer, Error},
ser::{SerializeSeq, Serializer},
};
#[allow(clippy::ptr_arg)]
pub fn serialize<S>(re: &Vec<Regex>, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut sequence = ser.serialize_seq(Some(re.len()))?;
for pattern in re {
sequence.serialize_element(pattern.as_str())?;
}
sequence.end()
}
pub fn deserialize<'de, D>(de: D) -> Result<Vec<Regex>, D::Error>
where
D: Deserializer<'de>,
{
let raw = Vec::<String>::deserialize(de)?;
let mut patterns = Vec::new();
for pat in raw {
let re = Regex::new(&pat).map_err(D::Error::custom)?;
patterns.push(re);
}
Ok(patterns)
}
}
impl PartialEq for Config {
fn eq(&self, other: &Config) -> bool {
let Config {
follow_web_links,
traverse_parent_directories,
ref exclude,
ref user_agent,
cache_timeout,
warning_policy,
} = self;
*follow_web_links == other.follow_web_links
&& *traverse_parent_directories == other.traverse_parent_directories
&& exclude.len() == other.exclude.len()
&& *user_agent == other.user_agent
&& *cache_timeout == other.cache_timeout
&& *warning_policy == other.warning_policy
&& exclude
.iter()
.zip(other.exclude.iter())
.all(|(l, r)| l.as_str() == r.as_str())
}
}
#[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub enum WarningPolicy {
Ignore,
Warn,
Error,
}
impl Default for WarningPolicy {
fn default() -> WarningPolicy { WarningPolicy::Warn }
}
#[cfg(test)]
mod tests {
use super::*;
use toml;
const CONFIG: &str = r#"follow-web-links = true
traverse-parent-directories = true
exclude = ["google\\.com"]
user-agent = "Internet Explorer"
cache-timeout = 3600
warning-policy = "error"
"#;
#[test]
fn deserialize_a_config() {
let should_be = Config {
follow_web_links: true,
warning_policy: WarningPolicy::Error,
traverse_parent_directories: true,
exclude: vec![Regex::new(r"google\.com").unwrap()],
user_agent: String::from("Internet Explorer"),
cache_timeout: 3600,
};
let got: Config = toml::from_str(CONFIG).unwrap();
assert_eq!(got, should_be);
}
#[test]
fn round_trip_config() {
let deserialized: Config = toml::from_str(CONFIG).unwrap();
let reserialized = toml::to_string(&deserialized).unwrap();
assert_eq!(reserialized, CONFIG);
}
}