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authorarg@mmvi <unknown>2006-09-25 08:21:51 +0200
committerarg@mmvi <unknown>2006-09-25 08:21:51 +0200
commit6b25d06d7d159bf89d740847fedc876ab0137b6b (patch)
tree49f46f104acb96c49eda4ae0f30415011ee57bf6 /util.c
parentcff951c65086950eeef5723b65dc06cbe7cdfa19 (diff)
downloaddwm-6b25d06d7d159bf89d740847fedc876ab0137b6b.tar.gz
applied Jukkas patch
Diffstat (limited to 'util.c')
0 files changed, 0 insertions, 0 deletions
 

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'use strict';

// Components remain as simple data structures
class Component {
    constructor(data = {}) {
        Object.assign(this, data);
    }
}

class Position extends Component {
    constructor(x = 0, y = 0) {
        super({ x, y });
    }
}

class Description extends Component {
    constructor(short = "", long = "", explorable = {}) {
        super({ short, long, explorable });
    }
}

class Inventory extends Component {
    constructor(items = []) {
        super({ items });
    }
}

class Messages extends Component {
    constructor(messages = []) {
        super({ messages });
    }
}

class Item extends Component {
    constructor(name, description, collectable = true) {
        super({ name, description, collectable });
    }
}

// World becomes a pure functional interface
const World = {
    create() {
        return {
            entities: new Map(),
            nextEntityId: 1
        };
    },

    createEntity(world) {
        const id = world.nextEntityId;
        const newEntities = new Map(world.entities);
        newEntities.set(id, new Map());
        
        return {
            ...world,
            entities: newEntities,
            nextEntityId: id + 1
        };
    },

    addComponent(world, entityId, component) {
        if (!world.entities.has(entityId)) return world;
        
        const newEntities = new Map(world.entities);
        const entityComponents = new Map(world.entities.get(entityId));
        entityComponents.set(component.constructor.name, component);
        newEntities.set(entityId, entityComponents);
        
        return {
            ...world,
            entities: newEntities
        };
    },

    getComponent(world, entityId, componentType) {
        if (!world.entities.has(entityId)) return null;
        return world.entities.get(entityId).get(componentType);
    },

    removeComponent(world, entityId, componentType) {
        if (!world.entities.has(entityId)) return world;
        
        const newEntities = new Map(world.entities);
        const entityComponents = new Map(world.entities.get(entityId));
        entityComponents.delete(componentType);
        newEntities.set(entityId, entityComponents);
        
        return {
            ...world,
            entities: newEntities
        };
    }
};