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use crate::consts::*;
use crate::Error;
use once_cell::sync::Lazy;
use poise::serenity_prelude::GuildId;
use rand::seq::SliceRandom;
pub fn parse_snowflake_from_env<T, F: Fn(u64) -> T>(key: &str, f: F) -> Option<T> {
std::env::var(key).ok().and_then(|v| v.parse().map(&f).ok())
}
pub fn parse_snowflakes_from_env<T, F: Fn(u64) -> T>(key: &str, f: F) -> Option<Vec<T>> {
std::env::var(key).ok().and_then(|gs| {
gs.split(',')
.map(|g| g.parse().map(&f))
.collect::<Result<Vec<_>, _>>()
.ok()
})
}
/*
* chooses a random element from an array
*/
pub fn random_choice<const N: usize>(arr: [&str; N]) -> Result<String, Error> {
let mut rng = rand::thread_rng();
if let Some(resp) = arr.choose(&mut rng) {
Ok((*resp).to_string())
} else {
Err(Into::into("couldn't choose from arr!"))
}
}
// waiting for `round_char_boundary` to stabilize
pub fn floor_char_boundary(s: &str, index: usize) -> usize {
if index >= s.len() {
s.len()
} else {
let lower_bound = index.saturating_sub(3);
let new_index = s.as_bytes()[lower_bound..=index]
.iter()
.rposition(|&b| (b as i8) >= -0x40); // b.is_utf8_char_boundary
// Can be made unsafe but whatever
lower_bound + new_index.unwrap()
}
}
pub fn is_guild_allowed(gid: GuildId) -> bool {
static ALLOWED_GUILDS: Lazy<Vec<GuildId>> = Lazy::new(|| {
parse_snowflakes_from_env("ALLOWED_GUILDS", GuildId)
.unwrap_or_else(|| vec![TEAWIE_GUILD, GuildId(1091969030694375444)])
});
ALLOWED_GUILDS.contains(&gid)
}
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