Struct LessonLibrary 

pub struct LessonLibrary { /* private fields */ }

Lesson library that stores all available lessons

Implementations

impl LessonLibrary

pub fn new() -> Self

pub fn register(&mut self, lesson: Lesson)

Register a lesson in the library

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

Get a lesson by ID

pub fn all(&self) -> Vec<&Lesson>

All lessons in learning order: registration order, except that a lesson always comes after the prerequisites it names. Stable across runs (the map used to come out in random order).

pub fn by_difficulty(&self, difficulty: Difficulty) -> Vec<&Lesson>

Operator-track lessons at this difficulty: the ladder the difficulty badges measure (Explorer has its own badge)

pub fn by_tag(&self, tag: &str) -> Vec<&Lesson>

Get lessons by tag

pub fn difficulty_counts(&self) -> HashMap<Difficulty, usize>

Count lessons per difficulty level (used for achievement unlock checks)

pub fn load_from_dir(&mut self, path: &Path) -> Result<usize>

Load user-provided *.toml lesson files from a directory and merge them with the built-in lessons. User lessons override built-ins with the same id. Returns the number of lessons loaded.

A missing directory is not an error (returns 0); an unreadable or unparsable lesson file is.

Trait Implementations

impl Clone for LessonLibrary

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LessonLibrary

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

Formats the value using the given formatter.

impl Default for LessonLibrary

fn default() -> Self

Returns the “default value” for a type.