start refacto home and fix description

src/providers/UserDataProvider.js

@@ -3,7 +3,7 @@ import { useDataFromRef } from "react-native-minuit/src/hooks";
 import useMinuit from "react-native-minuit/src/hooks/useMinuit";
 import { createContext, useContext, useGlobal } from "reactn";
 
-import { useState } from "react";
+import { useCallback, useEffect, useState } from "react";
 import { checkIfEmailIsValid } from "../actions/signupActions";
 import firebase, {
   arrayRemove,
@@ -104,11 +104,49 @@ export default ({ children }) => {
       refreshArray: [selectedProjectId],
     });
 
-  const resetSelectedProject = () => {
-    setSelectedProjectId(null);
-    setSelectedProject(null);
-  };
-  const selectProject = (projectId) => setSelectedProjectId(projectId || null);
+  const persistSelectedProjectId = useCallback(
+    async (projectId) => {
+      if (!currentUID) return;
+      try {
+        await usersRef.doc(currentUID).set(
+          {
+            selectedProjectId: projectId || null,
+          },
+          { merge: true },
+        );
+      } catch (error) {
+        console.log(
+          "UserDataProvider: unable to persist selectedProjectId",
+          error?.message || error,
+        );
+      }
+    },
+    [currentUID],
+  );
+
+  const selectProject = useCallback(
+    (projectId) => {
+      const safeId = projectId || null;
+      setSelectedProjectId(safeId);
+      if (!safeId) {
+        setSelectedProject(null);
+      }
+
+      if (currentUID) {
+        persistSelectedProjectId(safeId).catch((error) => {
+          console.log(
+            "UserDataProvider: persist selectedProjectId failed",
+            error?.message || error,
+          );
+        });
+      }
+    },
+    [currentUID, persistSelectedProjectId, setSelectedProject],
+  );
+
+  const resetSelectedProject = useCallback(() => {
+    selectProject(null);
+  }, [selectProject]);
 
   // Ancienne variante de création de projet supprimée pour éviter les doublons.
 
@@ -139,7 +177,7 @@ export default ({ children }) => {
         updatedAt: firebase.firestore.FieldValue.serverTimestamp(),
       };
       const { id } = await projectsRef.add(payload);
-      setSelectedProjectId(id);
+      selectProject(id);
       return id;
     } catch (e) {
       console.log("createNewProject error", e?.message);
@@ -294,6 +332,37 @@ export default ({ children }) => {
 
   const isSuperAdmin = currentUserRoles.some((role) => role === "SUPERADMIN");
 
+  useEffect(() => {
+    const remoteSelectedId = currentUserDoc?.selectedProjectId;
+    if (!remoteSelectedId) {
+      if (remoteSelectedId === null && selectedProjectId !== null) {
+        setSelectedProjectId(null);
+        setSelectedProject(null);
+      }
+      return;
+    }
+
+    if (remoteSelectedId !== selectedProjectId) {
+      setSelectedProjectId(remoteSelectedId);
+    }
+  }, [currentUserDoc?.selectedProjectId, selectedProjectId, setSelectedProject]);
+
+  useEffect(() => {
+    if (!Array.isArray(userProjects) || userProjects.length === 0) return;
+    if (selectedProjectId) return;
+    if (currentUserDoc?.selectedProjectId) return;
+
+    const fallbackProjectId = userProjects[0]?.id;
+    if (!fallbackProjectId) return;
+
+    selectProject(fallbackProjectId);
+  }, [
+    currentUserDoc?.selectedProjectId,
+    selectProject,
+    selectedProjectId,
+    userProjects,
+  ]);
+
   return (
     <UserDataContext.Provider
       value={{
@@ -323,7 +392,7 @@ export default ({ children }) => {
         unfollowUser,
         resetSelectedProject,
         selectProject,
-        setSelectedProjectId,
+        setSelectedProjectId: selectProject,
         updateProjectData,
         createNewProject,
       }}