Struct AssetIndex 

pub struct AssetIndex {
    pub version: u32,
    pub assets: HashMap<String, CachedAsset>,
}

In-memory representation of the index.json file.

Fields

version: u32

Schema version.

assets: HashMap<String, CachedAsset>

All known assets keyed by id.

Implementations

impl AssetIndex

pub fn empty() -> Self

Create an empty index at the current schema version.

pub fn load(cache_dir: &Path) -> Result<Self>

Load the index from cache_dir/index.json, returning an empty index if the file does not exist.

If the file exists but cannot be parsed (or has a version mismatch), an empty index is returned and all non-index files under cache_dir are purged so that blobs that are no longer tracked by the index cannot accumulate indefinitely on disk.

pub fn save(&self, cache_dir: &Path) -> Result<()>

Persist the index to cache_dir/index.json atomically via temp file + rename.

pub fn upsert(&mut self, asset: CachedAsset)

Insert or replace an asset entry.

pub fn remove(&mut self, id: &str) -> Option<CachedAsset>

Remove an asset entry, returning the old value if any.

pub fn get(&self, id: &str) -> Option<&CachedAsset>

Look up an asset by id.

pub fn get_mut(&mut self, id: &str) -> Option<&mut CachedAsset>

Mutably look up an asset by id.

pub fn touch(&mut self, id: &str) -> bool

Mark last_accessed on an asset as “now”.

pub fn total_size(&self) -> u64

Total size in bytes of all tracked assets.

pub fn len(&self) -> usize

Number of tracked assets.

pub fn is_empty(&self) -> bool

Whether the index contains no assets.

Trait Implementations

impl Clone for AssetIndex

fn clone(&self) -> AssetIndex

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AssetIndex

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for AssetIndex

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AssetIndex

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AssetIndex

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.