KSP-MGA-Planner/dist/main/solvers/sequence.js

export class FlybySequence {
    constructor(system, ids) {
        this.ids = ids;
        this.bodies = [];
        for (const id of ids) {
            this.bodies.push(system.bodyFromId(id));
        }
        this.length = this.bodies.length;
        const getSubstr = (i) => this.bodies[i].name.substring(0, 2);
        let str = getSubstr(0);
        for (let i = 1; i < this.length; i++) {
            str += "-" + getSubstr(i);
        }
        this.seqString = str;
    }
    static fromString(str, system) {
        str = str.trim();
        const initials = str.split('-');
        const ids = [];
        let attractor = 0;
        for (let i = 0; i < initials.length; i++) {
            let valid = false;
            for (const body of system.orbiting) {
                if (body.name.substring(0, 2) == initials[i]) {
                    if (i == 0) {
                        attractor = body.attractor.id;
                    }
                    else if (body.attractor.id != attractor) {
                        throw "All bodies of the sequence must orbit around the same body.";
                    }
                    ids.push(body.id);
                    valid = true;
                    break;
                }
            }
            if (!valid) {
                throw "Invalid custom sequence input.";
            }
        }
        if (ids.length <= 1) {
            throw "The sequence must contain at least two bodies.";
        }
        return new FlybySequence(system, ids);
    }
}