Dave
2b01d0e837
Pure helpers for the Gantt's drag/double-click math: - fractionToDate(fraction, range): what ISO date a fractional position in the chart represents, snapped to whole UTC days. - shiftDatesByFraction: move a bar's start and target by the same delta, clamped to the visible range, with start dropped when clamping would invert or collapse the span. - resizeEndToFraction: what the new target date becomes when the user drags a right edge. - moveCardByFraction: alias that produces the action's input shape. 11 unit tests cover the corners (no dates set, point bar, clamping past the right edge, inversion guard). rescheduleCardAction also drops its owner-only gate. Any signed-in user — owner or client manager — can move dates now. PocketBase's existing row-level rules govern which cards a given user can write (a client manager still only writes their own client's cards); the activity-log row is unchanged and attributes the move to the actual user either way. Adds setSubtaskDatesAction so the same drag/double-click gestures work on subtask rows. No audit log on subtasks — matches the existing pattern (subtask toggles don't log).
89 lines
3 KiB
TypeScript
89 lines
3 KiB
TypeScript
import { describe, it, expect } from "vitest";
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import {
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fractionToDate,
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shiftDatesByFraction,
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resizeEndToFraction,
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moveCardByFraction,
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} from "@/lib/roadmap/bar-math";
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import type { TimelineRange } from "@/lib/roadmap/timeline";
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const RANGE: TimelineRange = { from: "2026-02-01", to: "2026-02-22" };
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describe("fractionToDate", () => {
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it("maps 0 to range.from", () => {
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expect(fractionToDate(0, RANGE)).toBe("2026-02-01");
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});
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it("maps 1 to range.to (rounded)", () => {
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expect(fractionToDate(1, RANGE)).toBe("2026-02-22");
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});
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it("maps 0.5 to the midpoint", () => {
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expect(fractionToDate(0.5, RANGE)).toBe("2026-02-11");
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// 21 days span (Feb 1 to Feb 22 inclusive diff = 21); half = ~10.5 → 11
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});
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it("clamps out-of-range inputs", () => {
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expect(fractionToDate(-0.5, RANGE)).toBe("2026-02-01");
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expect(fractionToDate(1.5, RANGE)).toBe("2026-02-22");
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});
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});
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describe("shiftDatesByFraction — moving a bar", () => {
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it("shifts both dates by the same number of days when both are set", () => {
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const next = shiftDatesByFraction(
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"2026-02-05",
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"2026-02-10",
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21 / 21 / 2, // half the visible range ≈ 10.5 days → 11
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RANGE
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);
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expect(next.startDate).toBe("2026-02-16");
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expect(next.targetDate).toBe("2026-02-21");
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});
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it("returns nulls when neither date is set", () => {
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const next = shiftDatesByFraction("", "", 0.5, RANGE);
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expect(next).toEqual({ startDate: null, targetDate: null });
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});
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it("moves only the target when only the target is set", () => {
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const next = shiftDatesByFraction("", "2026-02-10", 0.1, RANGE);
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expect(next.startDate).toBeNull();
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expect(next.targetDate).toBe("2026-02-12");
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});
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it("clamps the target to range.to when dragged past the right edge", () => {
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const next = shiftDatesByFraction(
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"2026-02-18",
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"2026-02-20",
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10, // way past the right edge
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RANGE
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);
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// Both dates would clamp to range.to and collide; start is dropped
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// so the bar still renders as a point at the right edge.
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expect(next.startDate).toBeNull();
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expect(next.targetDate).toBe("2026-02-22");
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});
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it("keeps a 1-day span when only the target clamps", () => {
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// start=18 target=20 (2-day span). Drag 0.2 of the range (~4 days) right.
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// Target=20+4 = 24 → clamps to 22. Start=18+4 = 22, equal to target → drop.
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const next = shiftDatesByFraction("2026-02-18", "2026-02-20", 0.2, RANGE);
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expect(next.targetDate).toBe("2026-02-22");
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});
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});
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describe("resizeEndToFraction — right-edge resize", () => {
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it("returns the date at the new fraction", () => {
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expect(resizeEndToFraction("2026-02-05", 0.5, RANGE)).toBe("2026-02-11");
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});
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});
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describe("moveCardByFraction — action shape", () => {
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it("mirrors shiftDatesByFraction so the action gets the same shape", () => {
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const a = shiftDatesByFraction("2026-02-05", "2026-02-10", 0.1, RANGE);
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const b = moveCardByFraction("2026-02-05", "2026-02-10", 0.1, RANGE);
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expect(a).toEqual(b);
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});
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});
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