From 4a1f110ec23aab31f84badea1ad920a7d94a7cb8 Mon Sep 17 00:00:00 2001
From: Arnaud AMBROSELLI <arnaud.ambroselli@yahoo.fr>
Date: Tue, 6 Feb 2024 21:41:54 +0100
Subject: [PATCH] comment

---
 dashboard/src/recoil/evolutiveStats.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/dashboard/src/recoil/evolutiveStats.ts b/dashboard/src/recoil/evolutiveStats.ts
index 1d58de48b..c020f470d 100644
--- a/dashboard/src/recoil/evolutiveStats.ts
+++ b/dashboard/src/recoil/evolutiveStats.ts
@@ -135,6 +135,16 @@ export const evolutiveStatsPersonSelector = selectorFamily({
       evolutiveStatsIndicators: IndicatorsSelection;
     }) =>
     ({ get }) => {
+      // concepts:
+      // we select "indicators" (for now only one by one is possible) that are fields of the person
+      // we want to see the evolution of the number of persons for each value of each indicator
+      // one indicator is: one `field`, one `fromValue` and one `toValue`
+      // if only `field` is defined, we present a chart with the evolution of number of persons for each value of the field
+      // if `fromValue` is defined, we present the same chart filtere with the persons that have this value for the field at the beginning of the history
+      // if `toValue` is defined, we also filter the persons that have this value for the field at the end of the history, so that we present two numbers only
+      // how do we calculate ?
+      // we start by the most recent version of the person, and we go back in time, day by day, to the beginning of the history
+
       const indicatorsBase = get(evolutiveStatsIndicatorsBaseSelector);
       const fieldsMap: FieldsMap = indicatorsBase.reduce((acc, field) => {
         acc[field.name] = field;