utils.js

const directions = {
    0: "north",
    2: "east",
    4: "south",
    6: "west",
};

const relativeDirections = {
    0: "up",
    2: "right",
    4: "down",
    6: "left",
};

const combinatorToNormal = {
    undefined: "empty",
    "+": "plus",
    "-": "minus",
    "*": "multiply",
    "/": "divide",
    "%": "modulo",
    "^": "power",
    "<<": "left_shift",
    ">>": "right_shift",
    "&": "and",
    "and": "and",
    "AND": "and",
    "|": "or",
    "or": "or",
    "OR": "or",
    "xor": "xor",
    "XOR": "xor",
    ">": "gt",
    "<": "lt",
    "=": "eq",
    "!=": "neq",
    "≠": "neq",
    ">=": "gte",
    "≥": "gte",
    "<=": "lte",
    "≤": "lte"
};

function entitiesToGrid (entities) {
    const grid = {};

    for (let i in entities) {
        const entity = entities[i];
        if (grid[entity.position.x] === undefined) {
            grid[entity.position.x] = {}
        }

        grid[entity.position.x][entity.position.y] = entity;
    }

    return grid;
}

class EntityGridView {
    constructor (grid, centerX, centerY) {
        this.grid = grid;
        this.centerX = centerX;
        this.centerY = centerY;
    }

    getRelative (relativeX, relativeY) {
        const x = this.centerX + relativeX;
        const y = this.centerY + relativeY;

        if (this.grid[x] === undefined) {
            return undefined;
        }

        return this.grid[x][y];
    }

    setCenter(centerX, centerY){
        this.centerX = centerX;
        this.centerY = centerY;
    }
}

function isEntity (entity, target) {
    if (entity === undefined) {
        return 0;
    }

    if (entity.name === target) {
        return 1;
    }

    return 0;
}

function isEntityInDirection (entity, target, direction) {
    if (isEntity(entity, target)) {
        if ((entity.direction || 0) === direction) {
            return 1;
        }
    }

    return 0;
}

function recipeHasFluids (recipe) {
    const ingredients = recipe.ingredients || recipe.normal.ingredients;
    for (let i = 0; i < ingredients.length; i++) {
        if (ingredients[i].type === "fluid") {
            return true;
        }
    }
    return false;
}

module.exports = {
    directions,
    relativeDirections,
    combinatorToNormal,
    entitiesToGrid,
    EntityGridView,
    isEntity,
    isEntityInDirection,
    recipeHasFluids
};