120 lines
2.9 KiB
TypeScript
120 lines
2.9 KiB
TypeScript
module TK.SpaceTac {
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/**
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* Level and experience system for a ship, with enabled upgrades.
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*/
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export class ShipLevel {
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private level = 1
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private experience = 0
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private upgrades: string[] = []
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/**
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* Get current level
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*/
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get(): number {
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return this.level;
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}
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/**
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* Get the current experience points
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*/
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getExperience(): number {
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return this.experience;
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}
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/**
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* Get the activated upgrades
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*/
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getUpgrades(): string[] {
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return acopy(this.upgrades);
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}
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/**
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* Get the next experience goal to reach, to gain one level
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*/
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getNextGoal(): number {
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return isum(imap(irange(this.level), i => (i + 1) * 100));
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}
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/**
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* Force experience gain, to reach a given level
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*/
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forceLevel(level: number): void {
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while (this.level < level) {
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this.forceLevelUp();
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}
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}
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/**
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* Force a level up
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*/
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forceLevelUp(): void {
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let old_level = this.level;
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this.addExperience(this.getNextGoal() - this.experience);
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this.checkLevelUp();
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if (old_level >= this.level) {
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// security against infinite loops
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throw new Error("No effective level up");
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}
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}
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/**
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* Check for level-up
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*
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* Returns true if level changed
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*/
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checkLevelUp(): boolean {
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let changed = false;
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while (this.experience >= this.getNextGoal()) {
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this.level++;
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changed = true;
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}
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return changed;
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}
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/**
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* Add experience points
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*/
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addExperience(points: number): void {
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this.experience += points;
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}
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/**
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* Get upgrade points given by current level
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*
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* This does not deduce activated upgrades usage
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*/
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getUpgradePoints(): number {
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return this.level > 1 ? (1 + 2 * (this.level - 1)) : 0;
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}
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/**
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* (De)Activate an upgrade
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*
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* This does not check the upgrade points needed
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*/
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activateUpgrade(upgrade: ShipUpgrade, active: boolean): void {
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if (active) {
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add(this.upgrades, upgrade.code);
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} else {
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remove(this.upgrades, upgrade.code);
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}
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}
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/**
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* Check if an upgrade is active
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*/
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hasUpgrade(upgrade: ShipUpgrade): boolean {
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return contains(this.upgrades, upgrade.code);
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}
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/**
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* Clear all activated upgrades
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*/
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clearUpgrades(): void {
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this.upgrades = [];
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}
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}
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}
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