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import { Modifier } from "./Modifier";
import { Token } from "./Token";
import { TokenEffect } from "./TokenEffect";
import { TokenEffectType } from "./TokenEffectType";
type TokenEffectMapping = [Token, TokenEffect];
/**
* A immutable mapping of token effects.
*/
export class TokenEffects {
private _map: Map<Token, TokenEffect>;
constructor(mappings?: TokenEffectMapping[]) {
if (mappings) {
this._map = new Map(mappings);
} else {
this._map = new Map<Token, TokenEffect>();
}
}
/**
* Get the effect of the specified token.
*
* @param {Token} token
* The token from which we want the effect.
* @return {TokenEffect}
* The effect of the specified token.
*/
public getEffect(token: Token): TokenEffect {
return this._map.get(token);
}
/**
* Sets the effect for the specified token and returns a new mapping (the
* original mapping is untouched).
*
* @param {Token} token
* The token to set the effect for.
* @param {TokenEffect} effect
* The effect.
* @return {TokenEffects}
* The whole mapping.
*/
public setEffect(token: Token, effect: TokenEffect): TokenEffects {
const newMap = new Map(this._map);
newMap.set(token, effect);
const newEffects = new TokenEffects();
newEffects._map = newMap;
return newEffects;
}
/**
* Sets multiple effects at once a returns a new mapping.
*
* @param {TokenEffectMapping[]} mappings
* An array of token/effect pairs.
* @return {TokenEffects}
* A new mapping.
*/
public setEffects(mappings: TokenEffectMapping[]): TokenEffects {
const newMap = new Map(this._map);
mappings.forEach(([token, effect]) => {
newMap.set(token, effect);
});
const newEffects = new TokenEffects();
newEffects._map = newMap;
return newEffects;
}
/**
* Constructs a new token effects map by adding or overriding effects from
* another token effects map.
*
* @param {TokenEffects}
* The token effects map to add.
* @return {TokenEffects}
* A new token effects map.
*/
public merge(otherEffects: TokenEffects): TokenEffects {
const newTokenEffects = new TokenEffects();
this._map.forEach((effect, token) => {
newTokenEffects._map.set(token, effect);
});
otherEffects._map.forEach((effect, token) => {
newTokenEffects._map.set(token, effect);
});
return newTokenEffects;
}
/**
* Indicate of the specified token is autosuccess for this bag.
*
* @method isTokenAutoSuccess
* @param {Token} token
* The token.
* @return {boolean} `true` if the token is autosuccess, `false` otherwise.
*/
public isTokenAutoSuccess(token: Token): boolean {
return this._map.get(token).getOutcome() === TokenEffectType.AUTOSUCCESS;
}
/**
* Indicate of the specified token is autofail for this bag.
*
* @method isTokenAutoFail
* @param {Token} token
* The token.
* @return {boolean} `true` if the token is autofail, `false` otherwise.
*/
public isTokenAutoFail(token: Token): boolean {
return this._map.get(token).getOutcome() === TokenEffectType.AUTOFAIL;
}
/**
* Get the modifier value of the specified token for this bag.
*
* @method getTokenModifier
* @param {Token} token
* The token.
* @return {number} The modifier value.
* @throws {TypeError} if the specified token is an autosuccess or an autofail.
*/
public getTokenModifier(token: Token): number {
if (this._map.get(token).getOutcome() !== TokenEffectType.MODIFIER) {
throw new TypeError(`token ${token} is not a modifier`);
}
return (this._map.get(token) as Modifier).getValue();
}
/**
* Sort provided tokens from best outcome to worse.
*
* @method sortByBestOutcomeDesc
* @param {Token[]} tokens
* The tokens to sort.
* @return {Token[]} Sorted tokens.
*/
public sortByBestOutcomeDesc(tokens: Token[]): Token[] {
return tokens.sort((tokenA: Token, tokenB: Token) => {
if (tokenA === tokenB) {
return 0;
}
if (this.isTokenAutoSuccess(tokenA) && !this.isTokenAutoSuccess(tokenB)) {
return -1;
}
Iif (this.isTokenAutoSuccess(tokenB) && !this.isTokenAutoSuccess(tokenA)) {
return 1;
}
if (this.isTokenAutoFail(tokenA) && !this.isTokenAutoFail(tokenB)) {
return 1;
}
if (this.isTokenAutoFail(tokenB) && !this.isTokenAutoFail(tokenA)) {
return -1;
}
return this.getTokenModifier(tokenB) - this.getTokenModifier(tokenA);
});
}
/**
* Return wether or not pulling these tokens result in a success given the
* difference between to total skill value and the test difficulty. If
* several tokens are provided and none of them are autosuccess or autofails,
* their modifier values are added.
*
* @method isSuccess
* @param {Token[]} tokens
* The tokens pulled from the bag.
* @param {number} skillMinusDifficulty
* The difference between the total skill value and the difficulty fo the
* test.
*/
public isSuccess(tokens: Token[], skillMinusDifficulty: number): boolean {
// Autofail prevails
if (tokens.some(t => this.isTokenAutoFail(t))) {
return false;
}
if (tokens.some(t => this.isTokenAutoSuccess(t))) {
return true;
}
return (
tokens.reduce((sum, t) => sum + this.getTokenModifier(t), 0) +
skillMinusDifficulty >=
0
);
}
/**
* Separate redraw tokens from non-redraw tokens in the supplied array of
* tokens.
*
* @param {Token[]} tokens
* The tokens to separate.
* @return {{ redrawTokens: Token[]; nonRedrawTokens: Token[] }}
* An object with `redrawTokens` containing the redraw tokens and
* `nonRedrawTokens` containing non-redraw tokens.
*/
public separateRedrawTokens(
tokens: Token[]
): { redrawTokens: Token[]; nonRedrawTokens: Token[] } {
return {
nonRedrawTokens: tokens.filter(t => !this.getEffect(t).isRedraw()),
redrawTokens: tokens.filter(t => this.getEffect(t).isRedraw())
};
}
}
export const DefaultTokenEffects: TokenEffects = new TokenEffects([
[Token.PLUS_ONE, new Modifier(1)],
[Token.PLUS_ONE, new Modifier(1)],
[Token.ZERO, new Modifier(0)],
[Token.MINUS_ONE, new Modifier(-1)],
[Token.MINUS_TWO, new Modifier(-2)],
[Token.MINUS_THREE, new Modifier(-3)],
[Token.MINUS_FOUR, new Modifier(-4)],
[Token.MINUS_FIVE, new Modifier(-5)],
[Token.MINUS_SIX, new Modifier(-6)],
[Token.MINUS_SEVEN, new Modifier(-7)],
[Token.MINUS_EIGHT, new Modifier(-8)],
[Token.AUTOFAIL, new Autofail()],
[Token.BLESS, new Modifier(2, true)],
[Token.CURSE, new Modifier(-2, true)]
]);
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