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use crate::util::template::Template;
use crate::util::template::TemplateParams;
use rand::seq::SliceRandom;
use rand::Rng;
use std::collections::HashMap;
#[derive(Deserialize, Debug, PartialEq, Eq)]
#[serde(untagged)]
pub enum Message<'a> {
#[serde(borrow)]
Single(Template<'a>),
Choice(Vec<Template<'a>>),
}
impl<'a> Message<'a> {
fn resolve<R: Rng + ?Sized>(&self, rng: &mut R) -> Option<&Template<'a>> {
use Message::*;
match self {
Single(msg) => Some(msg),
Choice(msgs) => msgs.choose(rng),
}
}
}
#[derive(Deserialize, Debug, PartialEq, Eq)]
#[serde(untagged)]
enum NestedMap<'a> {
#[serde(borrow)]
Direct(Message<'a>),
#[serde(borrow)]
Nested(HashMap<&'a str, NestedMap<'a>>),
}
impl<'a> NestedMap<'a> {
fn lookup(&'a self, path: &str) -> Option<&'a Message<'a>> {
use NestedMap::*;
let leaf =
path.split('.')
.fold(Some(self), |current, key| match current {
Some(Nested(m)) => m.get(key),
_ => None,
});
match leaf {
Some(Direct(msg)) => Some(msg),
_ => None,
}
}
}
#[cfg(test)]
mod nested_map_tests {
use super::*;
#[test]
fn test_deserialize_nested_map() {
let src = r#"
[global]
hello = "Hello World!"
[foo.bar]
single = "Single"
choice = ["Say this", "Or this"]
"#;
let result = toml::from_str(src);
assert_eq!(
result,
Ok(NestedMap::Nested(hashmap! {
"global" => NestedMap::Nested(hashmap!{
"hello" => NestedMap::Direct(Message::Single(Template::parse("Hello World!").unwrap())),
}),
"foo" => NestedMap::Nested(hashmap!{
"bar" => NestedMap::Nested(hashmap!{
"single" => NestedMap::Direct(Message::Single(
Template::parse("Single").unwrap()
)),
"choice" => NestedMap::Direct(Message::Choice(
vec![
Template::parse("Say this").unwrap(),
Template::parse("Or this").unwrap()
]
))
})
})
}))
)
}
#[test]
fn test_lookup() {
let map: NestedMap<'static> = toml::from_str(
r#"
[global]
hello = "Hello World!"
[foo.bar]
single = "Single"
choice = ["Say this", "Or this"]
"#,
)
.unwrap();
assert_eq!(
map.lookup("global.hello"),
Some(&Message::Single(Template::parse("Hello World!").unwrap()))
);
assert_eq!(
map.lookup("foo.bar.single"),
Some(&Message::Single(Template::parse("Single").unwrap()))
);
assert_eq!(
map.lookup("foo.bar.choice"),
Some(&Message::Choice(vec![
Template::parse("Say this").unwrap(),
Template::parse("Or this").unwrap()
]))
);
}
}
// static MESSAGES_RAW: &'static str = include_str!("messages.toml");
static_cfg! {
static ref MESSAGES: NestedMap<'static> = toml_file("messages.toml");
}
pub fn get<R: Rng + ?Sized>(
name: &'static str,
rng: &mut R,
) -> Option<&'static Template<'static>> {
MESSAGES.lookup(name).and_then(|msg| msg.resolve(rng))
}
/// Look up and format a game message based on the given (dot-separated) name,
/// with the given random generator used to select from choice-based messages
pub fn message<'a, R: Rng + ?Sized>(
name: &'static str,
rng: &mut R,
params: &TemplateParams<'a>,
) -> String {
match get(name, rng) {
Some(msg) => msg.format(params).unwrap_or_else(|e| {
error!("Error formatting template: {}", e);
"Template Error".to_string()
}),
None => {
error!("Message not found: {}", name);
"Template Not Found".to_string()
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use rand::rngs::SmallRng;
use rand::SeedableRng;
#[test]
fn test_static_messages() {
message(
"global.welcome",
&mut SmallRng::from_entropy(),
&template_params!(),
);
}
}
|
