| /** | |
| * tierNavigation.js | |
| * | |
| * Single source of truth for "which tier buttons are clickable from here." | |
| * Pulled out of Dashboard.jsx's TierLadder deliberately: before this, the | |
| * reachability rule lived inline in JSX, and handleTierChange's if/else | |
| * chain lived a few lines below it as a SEPARATE, hand-maintained list -- | |
| * two things that had to agree with each other but had no mechanism | |
| * forcing them to. Confirmed empirically (see tierNavigation.test.js) | |
| * that they'd already drifted: the dashboard-tier button rendered | |
| * clickable at manual/automated tiers, but handleTierChange had no | |
| * matching branch, so tapping it silently did nothing. Same shape as | |
| * every other "two things that must agree, drifted apart, one caller | |
| * didn't notice" bug this project's patch logs keep finding elsewhere -- | |
| * fixed here the same way those were: one source of truth, not two | |
| * copies kept in sync by hand. | |
| */ | |
| import { TIERS } from "./tradeGate.js"; | |
| export const TIER_ORDER = [TIERS.DASHBOARD, TIERS.MANUAL, TIERS.AUTOMATED]; | |
| export function getTierRank(tierKey) { | |
| return TIER_ORDER.indexOf(tierKey); | |
| } | |
| /** | |
| * Every tier at or below (current + 1) is reachable -- stepping UP only | |
| * ever unlocks the next rung, but stepping DOWN is always fully open, | |
| * from any tier, in one tap. That asymmetry is deliberate (see | |
| * tradeGate.js's own "de-escalating trust should never be the hard | |
| * path"), not an oversight -- it's *why* dashboard is clickable from | |
| * automated, which is exactly the case that had no handler. | |
| */ | |
| export function getClickableTierKeys(currentTierKey) { | |
| const currentRank = getTierRank(currentTierKey); | |
| return TIER_ORDER.filter((key, i) => i !== currentRank && i <= currentRank + 1); | |
| } | |
| export function isTierClickable(currentTierKey, targetTierKey) { | |
| return getClickableTierKeys(currentTierKey).includes(targetTierKey); | |
| } | |