54 lines
2.4 KiB
TypeScript
54 lines
2.4 KiB
TypeScript
// Pure skill-progression module (spec §6): XP accrual, level→power, titles. No lib/db imports — operates on plain SkillRow data (Task 12's crew_skills table); the frontend imports it for the CREW-tab display.
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import type { SkillName } from './crew-costs'
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import { POWER_BANDS, XP_THRESHOLDS } from './crew-costs'
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export interface SkillRow {
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saveId: string
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crewId: string
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skill: SkillName
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level: number
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xp: number
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}
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export type CrewIdentity = { name: string; role: string }
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// Highest level 0–5 with xp ≥ XP_THRESHOLDS[level−1]; thresholds [5,10,15,20,25], cap 5.
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export function levelFromXp(xp: number): number {
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let level = 0
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for (let l = 1; l <= XP_THRESHOLDS.length; l++) if (xp >= XP_THRESHOLDS[l - 1]) level = l
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return level
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}
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// L0–2 → 1 · L3–4 → 2 · L5 → 3 (direct lookup into crew-costs POWER_BANDS).
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export function powerForLevel(level: number): number {
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return POWER_BANDS[level]
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}
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// From the member's HIGHEST skill level: ≥5 → "MASTER <ROLE>", ≥3 → "SENIOR <ROLE>", below → null.
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export function titleFor(member: CrewIdentity, skillRows: SkillRow[]): string | null {
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const highest = skillRows.reduce((max, r) => Math.max(max, r.level), 0)
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if (highest >= 5) return `MASTER ${member.role}`
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if (highest >= 3) return `SENIOR ${member.role}`
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return null
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}
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// +1 XP to every listed member's row for `skill`; returns updated rows + any level-up events. An event
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// fires when the gained skill steps into a titled band (3 → SENIOR, 5 → MASTER), e.g. "BEN OKONKWO is now a SENIOR PILOT — NAVIGATION L3" (title from the member's HIGHEST skill).
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export function grantXp(
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skillRows: SkillRow[],
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crewIds: string[],
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skill: SkillName,
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members: Record<string, CrewIdentity>,
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): { rows: SkillRow[]; events: string[] } {
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const rows = skillRows.map((r) =>
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r.skill === skill && crewIds.includes(r.crewId)
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? { ...r, xp: r.xp + 1, level: levelFromXp(r.xp + 1) }
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: r,
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)
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const events: string[] = []
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for (const crewId of crewIds) {
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const member = members[crewId]
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if (!member) continue
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const newLevel = rows.find((r) => r.crewId === crewId && r.skill === skill)?.level ?? 0
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if (newLevel === 3 || newLevel === 5) {
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const title = titleFor(member, rows.filter((r) => r.crewId === crewId))
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if (title) events.push(`${member.name} is now a ${title} — ${skill} L${newLevel}`)
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}
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}
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return { rows, events }
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}
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