Struct KnownRecipes 

pub struct KnownRecipes { /* private fields */ }

Set of recipes a player has unlocked, plus the protocol’s numeric display_id mapping.

The protocol uses an i32 per recipe (allocated server-side, sent in Recipe Book Add and referenced by Recipe Book Remove and Place Recipe). Display IDs are stable for the lifetime of the connection but are not persisted across sessions.

unlock/lock allocate / drop the display_ids mapping but keep the reverse by_display lookup so a stale Place Recipe packet from the client (e.g. arriving in the same tick as a remove dispatch) can still resolve the recipe id rather than being silently dropped.

Implementations

impl KnownRecipes

pub fn unlock(&mut self, id: RecipeId) -> i32

Records the recipe as unlocked for this player.

Allocates a new display_id if the recipe was not already known. Returns the recipe’s display_id (existing or newly allocated) so the caller can include it in the Recipe Book Add S2C packet.

pub fn lock(&mut self, id: &RecipeId) -> Option<i32>

Removes the recipe from the unlocked set.

Returns the display_id if the recipe was previously unlocked, otherwise None. The reverse by_display mapping is preserved so late-arriving Place Recipe packets can still resolve which recipe they referred to.

pub fn has(&self, id: &RecipeId) -> bool

Returns true if the recipe is unlocked for this player.

pub fn display_id(&self, id: &RecipeId) -> Option<i32>

Returns the display id assigned to the recipe, if any.

Reads the forward map only — locked recipes return None even though the reverse map may still hold them.

pub fn recipe_for_display(&self, display_id: i32) -> Option<&RecipeId>

Resolves a display_id back to a recipe id.

Used by Phase 2 to handle incoming Place Recipe packets. Returns the recipe even if it has since been locked — the caller decides whether to honour the request.

pub fn len(&self) -> usize

Returns the number of currently unlocked recipes.

pub fn is_empty(&self) -> bool

Returns true if no recipe is unlocked.

pub fn iter(&self) -> impl Iterator<Item = (&RecipeId, i32)>

Iterates the unlocked recipes paired with their display ids.

Iteration order matches the display_ids map’s iteration order, which is HashMap-defined (i.e. unspecified).

Trait Implementations

impl Clone for KnownRecipes

fn clone(&self) -> KnownRecipes

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KnownRecipes

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

Formats the value using the given formatter.

impl Default for KnownRecipes

fn default() -> KnownRecipes

Returns the “default value” for a type.

impl Component for KnownRecipes