Struct SaveManager 

pub struct SaveManager {
    pub save_dir: String,
    /* private fields */
}

Manages multiple save slots under a single directory.

Slots are numbered from 0. Slot 255 is reserved for the auto-save.

Fields

save_dir: String

Directory where save files are stored.

Implementations

impl SaveManager

pub fn new(save_dir: impl Into<String>) -> Self

Create a new SaveManager pointing at save_dir.

The directory is created lazily when a save is written.

pub fn list_slots(&self, max: usize) -> Vec<SaveSlot>

Return up to max slot descriptors (0 through max-1), reading headers from disk where save files exist.

pub fn save_to_slot( &self, slot: u8, snapshot: WorldSnapshot, header: SaveHeader, ) -> Result<(), SaveError>

Write a save to slot slot.

pub fn load_slot(&self, slot: u8) -> Result<SaveFile, SaveError>

Load the full save file from slot slot.

pub fn delete_slot(&self, slot: u8) -> Result<(), SaveError>

Delete the save file in slot slot.

pub fn auto_save(&self, snapshot: WorldSnapshot) -> Result<(), SaveError>

Write the auto-save slot.

pub fn has_auto_save(&self) -> bool

Returns true if an auto-save file exists.

pub fn load_auto_save(&self) -> Result<SaveFile, SaveError>

Load the auto-save.

pub fn most_recent_slot(&self) -> Option<u8>

Return the slot number of the most recently written save (by Unix timestamp).

Scans up to the first 32 slots plus the auto-save slot.

pub fn ensure_dir(&self) -> Result<(), SaveError>

Ensure the save directory exists.

pub fn used_slot_count(&self) -> usize

Count non-empty slots (0..32).