71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
/// <reference path="./IResource.ts" />
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abstract class Purchasable implements IResource {
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public readonly resourceType: ResourceType = ResourceType.consumable;
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public valueInWholeNumbers = true;
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public value = 0;
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public readonly cost: ResourceNumber = {};
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public inc?: (state: GameState) => number = undefined;
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public max?: (_state: GameState) => number = undefined;
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public userActions: ResourceAction[] = [
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{
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name: this._purchaseButtonText,
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description: this._purchaseDescription,
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isEnabled: (state: GameState): boolean =>
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(this.max === undefined || this.value < this.max(state)) &&
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state.isPurchasable(this.cost),
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performAction: (state: GameState): void => {
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this._purchase(state);
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},
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},
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];
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protected _costMultiplier: ResourceNumber = {};
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protected _isUnlocked = false;
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constructor(
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public readonly label: string,
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public readonly singularName: string,
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public readonly pluralName: string,
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public readonly description: string,
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private readonly _purchaseButtonText: string = 'Purchase',
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private readonly _purchaseDescription: string = `Buy a ${singularName}.`
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) {}
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public addValue(amount: number, _state: GameState): void {
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this.value += amount;
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}
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public isUnlocked(state: GameState): boolean {
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if (!this._isUnlocked && state.isPurchasable(this.cost)) {
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this._isUnlocked = true;
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}
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return this._isUnlocked;
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}
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public advanceAction(_time: number, _state: GameState): void {
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return;
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}
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protected _purchaseLog(amount: number, _state: GameState): string {
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return `You purchased ${amount} ${
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amount > 1 ? this.pluralName : this.singularName
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}.`;
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}
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private _purchase(state: GameState): void {
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if (this.max !== undefined && this.value >= this.max(state)) return;
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if (state.deductCost(this.cost)) {
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this.value += 1;
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state.log(this._purchaseLog(1, state));
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for (const key in this._costMultiplier) {
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const rkey = <ResourceKey>key;
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this.cost[rkey] =
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(this.cost[rkey] ?? 0) * (this._costMultiplier[rkey] ?? 1);
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}
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}
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}
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}
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