melodium-engine 0.10.0

Mélodium core engine and executor implementation
Documentation 
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use crate::building::{
    BuildId, CheckBuildResult, CheckEnvironment, CheckStep, ContextualEnvironment,
    DynamicBuildResult, GenesisEnvironment, StaticBuildResult,
};
use crate::building::{Builder as BuilderTrait, HostTreatment};
use crate::debug::Event;
use crate::error::LogicResult;
use crate::world::World;
use core::fmt::Debug;
use melodium_common::executive::{Model, World as ExecutiveWorld};
use std::sync::{Arc, Weak};

#[derive(Debug)]
pub struct Builder {
    world: Weak<World>,
    build_fn: fn(Arc<dyn ExecutiveWorld>) -> Arc<dyn Model>,
}

impl Builder {
    pub fn new(
        world: Weak<World>,
        build_fn: fn(Arc<dyn ExecutiveWorld>) -> Arc<dyn Model>,
    ) -> Self {
        Self { world, build_fn }
    }
}

impl BuilderTrait for Builder {
    fn static_build(
        &self,
        host_treatment: HostTreatment,
        host_build: Option<BuildId>,
        label: String,
        environment: &GenesisEnvironment,
    ) -> LogicResult<StaticBuildResult> {
        let world = self.world.upgrade().unwrap();
        let model = (self.build_fn)(Arc::clone(&world) as Arc<dyn ExecutiveWorld>);

        for (name, value) in environment.variables() {
            model.set_parameter(name, value.clone());
        }

        world.send_debug(Event::new(crate::debug::EventKind::ModelBuilt {
            model: model.descriptor(),
            parameters: environment.variables().clone(),
            host_treatment: host_treatment.clone(),
            host_build,
            label: label.clone(),
        }));

        let id = world.add_model(Arc::clone(&model) as Arc<dyn Model>);

        model.set_id(id);

        LogicResult::new_success(StaticBuildResult::Model(model))
    }

    fn dynamic_build(
        &self,
        _build: BuildId,
        _with_inputs: Vec<String>,
        _environment: &ContextualEnvironment,
    ) -> Option<DynamicBuildResult> {
        None
    }

    fn give_next(
        &self,
        _within_build: BuildId,
        _for_label: String,
        _for_outputs: Vec<String>,
        _environment: &ContextualEnvironment,
    ) -> Option<DynamicBuildResult> {
        None
    }

    fn check_dynamic_build(
        &self,
        _build: BuildId,
        _environment: CheckEnvironment,
        _previous_steps: Vec<CheckStep>,
    ) -> Option<CheckBuildResult> {
        None
    }

    fn check_give_next(
        &self,
        _within_build: BuildId,
        _for_label: String,
        _environment: CheckEnvironment,
        _previous_steps: Vec<CheckStep>,
    ) -> Option<CheckBuildResult> {
        None
    }
}