Show event-count data on timeline

Backend:
	Send event-count data to client in EventResponse instance
	Fix certain usages of gregorian calendar instead of julian
	Move HistDate, SCALES, etc, into cal.py
Frontend:
	Make App update a unitCountMaps object using event-count data from server
	Make TimeLine show visual indication of unit counts
	Add showEventCounts option to store
Update unit tests

1 files changed, 21 insertions, 0 deletions

diff --git a/src/lib.ts b/src/lib.ts
index 353fa57..7797469 100644
--- a/src/lib.ts
+++ b/src/lib.ts
@@ -305,6 +305,10 @@ export type HistEventJson = {
 	imgId: number,
 	pop: number,
 }
+export type EventResponseJson = {
+	events: HistEventJson[],
+	unitCounts: {[x: number]: number},
+}
 export function jsonToHistDate(json: HistDateJson){
 	if (json.gcal == null){
 		return new YearDate(json.year);
@@ -493,6 +497,23 @@ export function getEventPrecision(event: HistEvent): number {
 	}
 	return Number.POSITIVE_INFINITY;
 }
+export function dateToUnit(date: HistDate, scale: number): number {
+	if (scale >= 1){
+		return Math.floor(date.year / scale);
+	} else if (scale == MONTH_SCALE){
+		if (!date.gcal){
+			return julianToJdn(date.year, date.month, 1);
+		} else {
+			return gregorianToJdn(date.year, date.month, 1);
+		}
+	} else { // scale == DAY_SCALE
+		if (!date.gcal){
+			return julianToJdn(date.year, date.month, date.day);
+		} else {
+			return gregorianToJdn(date.year, date.month, date.day);
+		}
+	}
+}
 
 // For sending timeline-bound data to BaseLine
 export class TimelineState {