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use crate::ObjectType;
use crate::{object_name_deserialize, object_name_serialize, object_to_string};
use glib::GString;
use std::fmt::Display;
use std::fmt::Error;
use std::fmt::Formatter;
use std::hash::Hash;
use std::hash::Hasher;
fn hash_object_name(v: &glib::Variant) -> u32 {
unsafe { ffi::ostree_hash_object_name(v.as_ptr() as glib::ffi::gconstpointer) }
}
/// A reference to an object in an OSTree repo. It contains both a checksum and an
/// [ObjectType](enum.ObjectType.html) which together identify an object in a repository.
#[derive(Eq, Debug)]
pub struct ObjectName {
variant: glib::Variant,
checksum: GString,
object_type: ObjectType,
}
impl ObjectName {
/// Create a new `ObjectName` from a serialized representation.
pub fn new_from_variant(variant: glib::Variant) -> ObjectName {
let deserialize = object_name_deserialize(&variant);
ObjectName {
variant,
checksum: deserialize.0,
object_type: deserialize.1,
}
}
/// Create a new `ObjectName` with the given checksum and `ObjectType`.
pub fn new<S: Into<GString>>(checksum: S, object_type: ObjectType) -> ObjectName {
let checksum = checksum.into();
let variant = object_name_serialize(checksum.as_str(), object_type)
.expect("type checks should make this safe");
ObjectName {
variant,
checksum,
object_type,
}
}
/// Return a reference to this `ObjectName`'s checksum string.
pub fn checksum(&self) -> &str {
self.checksum.as_str()
}
/// Return this `ObjectName`'s `ObjectType`.
pub fn object_type(&self) -> ObjectType {
self.object_type
}
/// Format this `ObjectName` as a string.
fn to_string(&self) -> GString {
object_to_string(self.checksum(), self.object_type())
.expect("type checks should make this safe")
}
}
impl Display for ObjectName {
fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
write!(f, "{}", self.to_string())
}
}
impl Hash for ObjectName {
fn hash<H: Hasher>(&self, state: &mut H) {
state.write_u32(hash_object_name(&self.variant));
}
}
impl PartialEq for ObjectName {
fn eq(&self, other: &ObjectName) -> bool {
self.checksum == other.checksum && self.object_type == other.object_type
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn should_stringify_object_name() {
let object_name = ObjectName::new("abcdef123456", ObjectType::DirTree);
let stringified = format!("{object_name}");
assert_eq!(stringified, "abcdef123456.dirtree");
}
#[test]
fn same_values_should_be_equal() {
let a = ObjectName::new("abc123", ObjectType::File);
let b = ObjectName::new("abc123", ObjectType::File);
assert_eq!(a, b);
}
#[test]
fn different_values_should_not_be_equal() {
let a = ObjectName::new("abc123", ObjectType::Commit);
let b = ObjectName::new("abc123", ObjectType::File);
assert_ne!(a, b);
}
#[test]
fn should_create_object_name_from_variant() {
let object_name = ObjectName::new("123456", ObjectType::CommitMeta);
let from_variant = ObjectName::new_from_variant(object_name.variant.clone());
assert_eq!(object_name, from_variant);
assert_eq!("123456", from_variant.checksum());
assert_eq!(ObjectType::CommitMeta, from_variant.object_type());
}
}
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