open-closed-bad.ts

class Character {  
    private _power: number;
    private _name: string;
    private _type: string; // Heroe, Villain or Human

    constructor(name:string, power: number = 0, type: string ){
        this._name = name;
        this._power = power;
        this._type = type;
    }

    get power(): number {
        return this._power;
    };
    get name(): string {
        return this._name;
    }
    get type(): string {
        return this._type;
    }
    calculateFightPower(): number{
        let result = 0;
        if(this.type === 'Heroe') {
            result += this._power * 2;
        }
        if(this.type === 'Villain'){
            result += this._power + 100;
        }
        if(this.type === 'Human') {
            result += this._power + 10;
        }
        // OCP Violated: if We need a new character's type.
        return result;
    }


}



class CharacterService {
  
    characters: Character[] = [
                new Character("Mario", 100, 'Heroe'),
                new Character("Koopa", 85, 'Villain'),
                new Character("Carlos", 30, 'Human'),
    ];

    constructor() {
        const power = this.calculatePowerTeam(this.characters);
        console.log(`The power of the team is ${power}`);
    }

    calculatePowerTeam(characters: Character[]){  
        let power = 0;
        for (const character of characters) {
           power += character.calculateFightPower();
        }
        return power;
    }
}
new CharacterService();