diff --git a/src/routing/admin.router.ts b/src/adminview/admin.router.ts
similarity index 92%
rename from src/routing/admin.router.ts
rename to src/adminview/admin.router.ts
index c77b422d2e60d041836e30494b7d75b2674007cc..6e98df37c905d0eb79326fbde5f3835cde5a169b 100644
--- a/src/routing/admin.router.ts
+++ b/src/adminview/admin.router.ts
@@ -13,6 +13,14 @@ import passport from 'passport';
 import flash from 'connect-flash';
 import { ensureLoggedIn } from 'connect-ensure-login';
 
+import favicon from 'serve-favicon';
+
+app.use(favicon(path.resolve('./', 'assets', 'favicon.ico')));
+// specifies path to static assets. ......je comprends pas ce que c'est. TODO
+app.use('/assets', express.static(path.resolve('./', 'assets')));
+
+// router: an Express router. https://expressjs.com/en/4x/api.html#router
+// = a "sub-middleware stack", a “mini-application" inside the main application
 const router = Router();
 
 router.use(flash());
diff --git a/src/app.ts b/src/app.ts
index ec374e4a2df6b26266c534c0f6833f4ced6bc1f2..df227bf522e1832d79d2c617152034c5ec25ad18 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,11 +1,12 @@
 /** 
  * @file Initialise et configure le serveur Express sur lequel tourne le back.
  * 
- * La configuration inclut tout le _middleware_ définissant les API et les services
- * nécessaire utilisés, comme `express-session`, GraphiQL, GraphQL Voyager.
+ * Inclut les middlewares des packages utilisés: apollo-server, passportjs, morgan...
+ * et définit le middleware de notre API.
+ * Pour comprendre ce que fait chaque package, se référer à leur page sur https://www.npmjs.com.
  * 
- * @todo changer cette description... ^
- * @todo qu'arrive-t-il aux requetes avec un cookie expire? elles ne sont traitees ni par passport.session() ni par passport.authenticate('ldapauth')...
+ * On peut considérer que les app.use (et app.get et app.post) sont pattern-matchés et
+ * exécutés séquentiellement. http://expressjs.com/en/guide/using-middleware.html
  * 
  * @author manifold, kadabra
  */
@@ -13,47 +14,46 @@ import express from 'express';
 import bodyParser from 'body-parser';
 // packages pour graphql
 import { express as graphqlVoyager } from 'graphql-voyager/middleware';
-// replacement of express-graphql, which hasn't been updated in 6 months 
-import { ApolloServer } from 'apollo-server-express'; //hawkspar->manifold VSCode râle ici pr moi
-// typeDefs and resolvers
-import schema from './graphql/schema';
-// packages pour adminview
-import { ensureLoggedIn } from 'connect-ensure-login';
-import flash from 'connect-flash';
-import router from './routing/admin.router';
+import { ApolloServer } from 'apollo-server-express';
+import schema from './graphql/schema'; // definition du schéma et des resolvers
+// l'interface admin du back (adminview)
+import router from './adminview/admin.router';
 // packages pour l'authentification
 import passport from 'passport';
 import session from 'express-session';
-import cookieParser from 'cookie-parser'; //hawkspar->manifold VSCode râle ici pr moi
+import cookieParser from 'cookie-parser';
 import cors from 'cors';
-// packages divers
-import favicon from 'serve-favicon';
+// HTTP request logger
 import morgan from 'morgan';
 // packages pour pouvoir importer depuis des fichiers de config
 import path from 'path';
 
-import {ldapConfig, credentialsLdapConfig} from './ldap/config';
-
+// config des paramètres de connexion au LDAP
+import { ldapConfig, credentialsLdapConfig } from './ldap/config';
 const { dn, passwd } = credentialsLdapConfig;
 
-// "The app object conventionally denotes the Express application" 
-// see https://expressjs.com/en/4x/api.html#app
-const app = express(); 
-
-// Parse incoming HTTP request bodies, available under the req.body property. cf www.npmjs.com/package/body-parser
+// app: denotes the Express application
+const app = express();
+// parse incoming HTTP request bodies, available under the req.body property
 app.use(bodyParser.json()); //parses bodies of media type "application/json"
 app.use(bodyParser.urlencoded({ //parses bodies of media type "application/x-www-form-urlencoded"
-    extended: true //use qs library (quoi que ca veuille dire o.O)
+    extended: true //use qs library (see https://www.npmjs.com/package/body-parser#bodyparserurlencodedoptions)
 }));
-//parses Cookie header and populate req.cookies with an object keyed by the cookie names. was necessary for express-session before its v1.5.0. on peut probablement l'enlever desormais.
+// parse Cookie header and populate req.cookies with an object keyed by the cookie names
 app.use(cookieParser());
-
-// cache le fait que l'application tourne sous Express dans le header HTTP.
+// ne *pas* inclure de header HTTP publicisant que l'application tourne sous Express
 app.disable('x-powered-by');
+// setup morgan (HTTP request logger middleware)
 app.use(morgan('dev'));
-app.use(favicon(path.resolve('./', 'assets', 'favicon.ico')));
-// specifies path to static assets. ......je comprends pas ce que c'est. TODO
-app.use('/assets', express.static(path.resolve('./', 'assets')));
+
+/**
+ * @desc SETUP DE ADMINVIEW
+ */
+// setting up view engine for pug, for adminview
+console.log("Express app is running at", __dirname);
+let viewpath = path.resolve(__dirname, 'views');
+app.set('views', viewpath);
+app.set('view engine', 'pug');
 
 /**
  * @desc AUTHENTIFICATION POUR LES REQUETES POSSEDANT UN COOKIE ET PROVENANT D'UN UTILISATEUR DEJA AUTHENTIFIE
@@ -74,11 +74,6 @@ app.use('/assets', express.static(path.resolve('./', 'assets')));
  * it is important to configure this right!!! please check out https://www.npmjs.com/package/express-session 
  * and make sure you understand the way session is stored. (en vrai c'est vraiment important...)
  */
-app.use(session({
-    secret: ldapConfig.sessionSecret,
-    resave: true,
-    saveUninitialized: false,
-}));
 
 app.use(passport.initialize());
 
@@ -97,14 +92,6 @@ app.use(passport.session(), (req, res, next)=>{
 // connect-flash is middleware for flashing messages, used in adminview
 app.use(flash());
 
-/**
- * @desc SETUP DE ADMINVIEW
- */
-// setting up view engine for pug, for adminview
-console.log("Running at", __dirname);
-let viewpath = path.resolve(__dirname, 'views');
-app.set('views', viewpath);
-app.set('view engine', 'pug');