diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..298ac86
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,94 @@
+// import * as test from './tests'
+// import * as services from './services'
+// import * as models from './models'
+//--------------------------
+// MODEL
+//-------------------------
+// TODO complete
+class ServerState {
+}
+class User {
+}
+class Message {
+}
+class Channel {
+}
+//--------------------------
+// SERVICES
+//-------------------------
+function initState() {
+    const superUser = {
+        pseudo: 'admin',
+        status: 'Connected',
+        points: 5
+    }; //status: 'Connected', points: 5
+    let newServer = {
+        users: [superUser],
+        channels: [],
+        messages: [],
+    };
+    return newServer;
+}
+;
+function registerUser(state, user) {
+    state.users.push(user);
+    return state;
+}
+//We always pass server state
+function createChannel(user) {
+    if (user.points >= 1) {
+        const newChannel = {
+            name: "new Channel",
+            creator: "Channel Creator",
+            user: user,
+        };
+        return newChannel;
+    }
+    return null;
+}
+//Crée un chanel sans participants. Vérifier points >= 1
+function inviteUser(channel, user) {
+    if (channel.user == user || user.points >= 2) {
+        channel.participants.push(user);
+        return true;
+    }
+    return false;
+}
+//Vérifier user is owner ou points >= 2; 
+// Ajoute un utilisateur à un channel
+function readChannel(channel) {
+    console.log(channel.name);
+    console.log(channel.creator);
+    console.log(channel.participants);
+    console.log(channel.messages);
+    console.log(channel.user);
+}
+//Vérifier appartennance 
+function sendQuestion(user) {
+    if (user.points == 0) {
+        user.points++;
+        return true;
+    }
+    return false;
+}
+//Vérifier appartennance; if points ==0 then add 1 point to user
+function sendAnswer(channel, user) {
+    if (channel.user == user && user.points >= 3) {
+        return true;
+    }
+    return false;
+} //Vérifier appartennance ou super user && points >= 3
+function noteQuestion() {
+} //Vérifier appartenance && points >= 1 ; récalculer points
+// noteAnswer //Vérifier appartenance && points >= 2 ; récalculer points
+// suspendUser // only super users (5 points) peuvent suspendre un utilisateur
+// calculerPoints // selon la notation de ces questions / responses
+//--------------------------
+// TESTING THE APPLICATION
+//-------------------------
+// (function(){
+//   const server = initState();
+//   document.body.textContent = server.users.map(user => "Hello ! " + user.pseudo)
+//   .reduce((acc,u)=>acc + " " + undefined, '');
+// })
+document.body.textContent = "Hello !";
diff --git a/src/index.ts b/src/index.ts
index af84f20..8b396bc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,51 +8,215 @@
 
 // TODO complete
 
-class ServerState{
-  users: [User];
+class ServerState {
+  users: User[];
+  channels: Channel[];
+  messages: Message[]
 }
 
 class User {
   pseudo: string;
+  status: 'Connected' | 'Deconnected' | 'Suspend';
+  points: 0 | 1 | 2 | 3 | 4 | 5;
 }
 
+class Message {
+  content: 'Question' | 'Answer' | 'Note';
+  user: User
+}
+
+class Channel {
+  name: string;
+  creator: User;
+  participants?: User[];
+  messages?: Message[];
+  user: User;
+}
 
 //--------------------------
 // SERVICES
 //-------------------------
 
 function initState(): ServerState {
-  const superUser: User = { pseudo: 'admin' } //status: 'Connected', points: 5
+  const superUser: User = {
+    pseudo: 'admin',
+    status: 'Connected',
+    points: 5
+  } //status: 'Connected', points: 5
 
   let newServer: ServerState = {
-    users: [superUser]
+    users: [superUser],
+    channels: [] as Channel[],
+    messages: [] as Message[],
   };
-
   return newServer;
 };
 
-// function registerUser(state: ServerState, user: User): ServerState //We always pass server state
-
-// function createChannel //Crée un chanel sans participants. Vérifier points >= 1
-
-// function inviteUser //Vérifier user is owner ou points >= 2; Ajoute un utilisateur à un channel
-
-// readChannel //Vérifier appartennance 
-
-// sendQuestion //Vérifier appartennance; if points ==0 then add 1 point to user
-
-// sendAnswer //Vérifier appartennance ou super user && points >= 3
-
-// noteQuestion //Vérifier appartenance && points >= 1 ; récalculer points
-
-// noteAnswer //Vérifier appartenance && points >= 2 ; récalculer points
-
-// suspendUser // only super users (5 points) peuvent suspendre un utilisateur
-
-// calculerPoints // selon la notation de ces questions / responses
+function registerUser(state: ServerState, user: User): ServerState {
+  state.users.push(user)
+  return state;
+}
+//We always pass server state
+
+function createChannel(state: ServerState, name: string, user: User): ServerState {
+  if (user.points >= 1) {
+    let newChannel: Channel = {
+      name: name,
+      creator: user,
+      participants: [user],
+      messages: [] as Message[],
+      user: user,
+    }
+    if (state.channels === null) {
+      state.channels = [newChannel];
+    }
+    else {
+      state.channels.push(newChannel);
+    }
+    return state;
+  } else {
+    return state;
+  }
+  //Crée un chanel sans participants. Vérifier points >= 1
+
+  function inviteUser(channel: Channel, user: User): boolean {
+    if (channel.user == user || user.points >= 2) {
+      channel.participants.push(user);
+      return true;
+    }
+    return false;
+  }
+  //Vérifier user is owner ou points >= 2; 
+  // Ajoute un utilisateur à un channel
+
+  function readChannel(channel: Channel) {
+    console.log(channel.name)
+    console.log(channel.creator)
+    console.log(channel.participants)
+    console.log(channel.messages)
+    console.log(channel.user)
+  }
+  //Vérifier appartennance 
+
+  function createQuestion(user: User, content: string): Message {
+    let question: Message = {
+      content: "Question",
+      user: user
+    }
+    return question;
+  };
 
-//--------------------------
-// TESTING THE APPLICATION
-//-------------------------
+  function sendQuestion(channel: Channel, user: User) {
+    if (channel.participants.indexOf(user) > 0) {
+      if (user.points == 0) {
+        user.points++;
+        const message: Message = {
+          content: 'Question',
+          user: user
+        }
+        channel.messages.push(message)
+      }
+    }
+  }
+
+  function createAnswer(user: User, content: string, question: Message): Message {
+    let reponse: Message = {
+      content: "Answer",
+      user: user
+    }
+    return reponse;
+  };
 
-document.body.textContent = "Hello !";
+  //Vérifier appartennance; if points ==0 then add 1 point to user
+
+  function sendAnswer(channel: Channel, user: User) {
+
+    if (channel.participants.indexOf(user) > 0 ||
+      channel.user == user && user.points >= 3) {
+      const message: Message = {
+        content: "Answer",
+        user: user
+      }
+      channel.messages.push(message)
+    }
+  } //Vérifier appartennance ou super user && points >= 3
+
+  function noteQuestion(channel: Channel, user: User) {
+    if (channel.participants.indexOf(user) > 0 && user.points >= 1) {
+
+    }
+  } //Vérifier appartenance && points >= 1 ; récalculer points
+
+  function noteAnswer(channel: Channel, user: User) {
+    if (channel.participants.indexOf(user) > 0 && user.points >= 2) {
+      return true;
+    }
+    return false;
+  } //Vérifier appartenance && points >= 2 ; récalculer points
+
+  function suspendUser(user: User) {
+    if (user.points == 5) {
+      user.status = "Suspend"
+    }
+  } // only super users (5 points) peuvent suspendre un utilisateur
+
+  function calculerPoints(channel: Channel) {
+
+  } // selon la notation de ces questions / responses
+
+
+  function getChannel(state: ServerState, name: String): Channel {
+    for (var i = 0; i < state.channels.length; i++) {
+      if (state.channels[i].name === name) {
+        return state.channels[i];
+      }
+    }
+    return null;
+  }
+
+  //--------------------------
+  // TESTING THE APPLICATION
+  //-------------------------
+
+  (function(){
+    let server = initState();
+    let u1: User = {
+      pseudo: "u1",
+      status: "Connected",
+      points: 5
+    };
+    let u2: User = {
+      pseudo: "u2",
+      status: "Connected",
+      points: 0
+    };
+    let u3: User = {
+      pseudo: "u3",
+      status: "Connected",
+      points: 3
+    };
+    server = registerUser(server, u1);
+    server = registerUser(server, u3);
+    server = createChannel(server, "Message1", u1);
+    server = createChannel(server, "Message3", u3);
+    server = registerUser(server, u2);
+    let chan = getChannel(server, "Message1");
+    inviteUser(chan, u2);
+    let question = createQuestion(u2, "Is ok?");
+    sendQuestion(chan, u2);
+    noteQuestion(chan, u1);
+    let q1: Message = {
+      content: "Question",
+      user: user
+    };
+    let reponse = createAnswer(u1, "Ok", q1)
+    sendAnswer(chan, u1);
+    inviteUser(chan, u3);
+    noteQuestion(chan, u3);
+    suspendUser(u2);
+    document.body.textContent = server.users.map(user => "Hello ! " + user.pseudo)
+    .reduce((acc,u)=>acc + " " + undefined, '');
+    console.log(server);
+  })
+
+  // document.body.textContent = "Hello !";
\ No newline at end of file