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//! A resource, like minecraft:stone
use azalea_buf::{BufReadError, McBufReadable, McBufWritable};
use std::io::{Cursor, Write};
#[derive(Hash, Clone, PartialEq, Eq)]
pub struct ResourceLocation {
pub namespace: String,
pub path: String,
}
static DEFAULT_NAMESPACE: &str = "minecraft";
// static REALMS_NAMESPACE: &str = "realms";
impl ResourceLocation {
pub fn new(resource_string: &str) -> Result<ResourceLocation, BufReadError> {
let sep_byte_position_option = resource_string.chars().position(|c| c == ':');
let (namespace, path) = if let Some(sep_byte_position) = sep_byte_position_option {
if sep_byte_position == 0 {
(DEFAULT_NAMESPACE, &resource_string[1..])
} else {
(
&resource_string[..sep_byte_position],
&resource_string[sep_byte_position + 1..],
)
}
} else {
(DEFAULT_NAMESPACE, resource_string)
};
Ok(ResourceLocation {
namespace: namespace.to_string(),
path: path.to_string(),
})
}
}
impl std::fmt::Display for ResourceLocation {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}:{}", self.namespace, self.path)
}
}
impl std::fmt::Debug for ResourceLocation {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}:{}", self.namespace, self.path)
}
}
impl McBufReadable for ResourceLocation {
fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
let location_string = String::read_from(buf)?;
ResourceLocation::new(&location_string)
}
}
impl McBufWritable for ResourceLocation {
fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
self.to_string().write_into(buf)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn basic_resource_location() {
let r = ResourceLocation::new("abcdef:ghijkl").unwrap();
assert_eq!(r.namespace, "abcdef");
assert_eq!(r.path, "ghijkl");
}
#[test]
fn no_namespace() {
let r = ResourceLocation::new("azalea").unwrap();
assert_eq!(r.namespace, "minecraft");
assert_eq!(r.path, "azalea");
}
#[test]
fn colon_start() {
let r = ResourceLocation::new(":azalea").unwrap();
assert_eq!(r.namespace, "minecraft");
assert_eq!(r.path, "azalea");
}
#[test]
fn colon_end() {
let r = ResourceLocation::new("azalea:").unwrap();
assert_eq!(r.namespace, "azalea");
assert_eq!(r.path, "");
}
#[test]
fn mcbuf_resource_location() {
let mut buf = Vec::new();
ResourceLocation::new("minecraft:dirt")
.unwrap()
.write_into(&mut buf)
.unwrap();
let mut buf = Cursor::new(&buf[..]);
assert_eq!(
ResourceLocation::read_from(&mut buf).unwrap(),
ResourceLocation::new("minecraft:dirt").unwrap()
);
}
}
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