init

migration/src/m20220101_000001_create_table.rs

@@ -746,6 +746,7 @@ impl MigrationTrait for Migration {
                 Table::create()
                     .table(Alias::new("computed_permission"))
                     .if_not_exists()
+                    .col(ColumnDef::new(Alias::new("id")).uuid().not_null())
                     .col(ColumnDef::new(Alias::new("user_id")).uuid().not_null())
                     .col(ColumnDef::new(Alias::new("server_id")).uuid().not_null())
                     .col(
@@ -762,6 +763,7 @@ impl MigrationTrait for Migration {
                     )
                     .primary_key(
                         Index::create()
+                            .col(Alias::new("id"))
                             .col(Alias::new("user_id"))
                             .col(Alias::new("server_id"))
                             .col(Alias::new("scope_type"))

src/domain/dto/category.rs

@@ -10,9 +10,7 @@ pub struct CategoryQueryParams {
 
 impl Default for CategoryQueryParams {
     fn default() -> Self {
-        Self {
+        Self { server_id: None }
-            server_id: None,
-        }
     }
 }
 
@@ -36,4 +34,9 @@ pub struct CategoryResponse {
     pub name: String,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
+
+    /// None : contexte sans permissions (champ ignoré dans le JSON).
+    /// Some(value) : valeur de computed_permission (0 si absente).
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub permission: Option<u64>,
 }

src/domain/dto/channel.rs

@@ -41,6 +41,11 @@ pub struct ChannelResponse {
     pub name: Option<String>,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
+
+    /// None : contexte sans permissions (champ ignoré dans le JSON).
+    /// Some(value) : valeur de computed_permission (0 si absente).
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub permission: Option<u64>,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]

src/repositories/mod.rs

@@ -21,7 +21,7 @@ mod server;
 mod server_item_order;
 mod server_tree;
 pub mod types;
-mod user;
+pub mod user;
 
 #[derive(Clone, Debug)]
 pub struct RepositoryContext {

src/repositories/server_tree.rs

@@ -1,23 +1,12 @@
 use crate::models::{category, channel, computed_permission, server_item_order};
 use crate::permissions::ChannelPermission;
+use crate::repositories::types::{CategoryWithPermissions, ChannelWithPermissions, ServerTreeData};
 use crate::repositories::{AnyResult, RepositoryContext};
-use sea_orm::{ColumnTrait, EntityTrait, JoinType, QueryFilter, QuerySelect};
+use sea_orm::{ColumnTrait, EntityTrait, QueryFilter};
+use std::collections::HashMap;
 use std::sync::Arc;
 use uuid::Uuid;
 
-#[derive(Debug, Clone)]
-pub struct ChannelWithPermissions {
-    pub channel: channel::Model,
-    pub permissions: ChannelPermission,
-}
-
-#[derive(Debug, Clone)]
-pub struct ServerTreeData {
-    pub orders: Vec<server_item_order::Model>,
-    pub categories: Vec<category::Model>,
-    pub channels: Vec<ChannelWithPermissions>,
-}
-
 #[derive(Clone, Debug)]
 pub struct ServerTreeRepository {
     pub context: Arc<RepositoryContext>,
@@ -25,7 +14,7 @@ pub struct ServerTreeRepository {
 
 impl ServerTreeRepository {
     pub async fn get_for_user(&self, server_id: Uuid, user_id: Uuid) -> AnyResult<ServerTreeData> {
-        let (orders, categories, channel_rows) = tokio::try_join!(
+        let (orders, categories_models, channel_models, computed_permissions) = tokio::try_join!(
             async {
                 Ok::<_, anyhow::Error>(
                     server_item_order::Entity::find()
@@ -42,16 +31,53 @@ impl ServerTreeRepository {
                         .await?,
                 )
             },
-            self.find_channels_with_permissions(server_id, user_id),
+            async {
+                Ok::<_, anyhow::Error>(
+                    channel::Entity::find()
+                        .filter(channel::Column::ServerId.eq(server_id))
+                        .all(&self.context.db)
+                        .await?,
+                )
+            },
+            async {
+                Ok::<_, anyhow::Error>(
+                    computed_permission::Entity::find()
+                        .filter(computed_permission::Column::UserId.eq(user_id))
+                        .filter(computed_permission::Column::ServerId.eq(server_id))
+                        .all(&self.context.db)
+                        .await?,
+                )
+            },
         )?;
 
-        let channels = channel_rows
+        let perm_map: HashMap<Uuid, u64> = computed_permissions
             .into_iter()
-            .filter_map(|(channel, permission)| {
+            .map(|cp| (cp.resource_id, cp.permissions as u64))
-                permission.map(|permission| ChannelWithPermissions {
+            .collect();
-                    channel,
+
-                    permissions: ChannelPermission::from_bits_retain(permission.permissions as u64),
+        let categories = categories_models
+            .into_iter()
+            .map(|category| {
+                let permissions = perm_map
+                    .get(&category.id)
+                    .map(|&p| ChannelPermission::from_bits_retain(p));
+                CategoryWithPermissions {
+                    category,
+                    permissions,
+                }
             })
+            .collect();
+
+        let channels = channel_models
+            .into_iter()
+            .map(|channel| {
+                let permissions = perm_map
+                    .get(&channel.id)
+                    .map(|&p| ChannelPermission::from_bits_retain(p));
+                ChannelWithPermissions {
+                    channel,
+                    permissions,
+                }
             })
             .collect();
 
@@ -61,31 +87,4 @@ impl ServerTreeRepository {
             channels,
         })
     }
-
-    async fn find_channels_with_permissions(
-        &self,
-        server_id: Uuid,
-        user_id: Uuid,
-    ) -> AnyResult<Vec<(channel::Model, Option<computed_permission::Model>)>> {
-        // Construction dynamique de la relation personnalisée (channel.id = computed_permission.resource_id)
-        let channel_to_permission = channel::Entity::belongs_to(computed_permission::Entity)
-            .from(channel::Column::Id)
-            .to(computed_permission::Column::ResourceId)
-            .into();
-
-        let rows = channel::Entity::find()
-            .join(JoinType::InnerJoin, channel_to_permission)
-            .filter(channel::Column::ServerId.eq(server_id))
-            .filter(computed_permission::Column::UserId.eq(user_id))
-            .filter(computed_permission::Column::ServerId.eq(server_id))
-            .filter(
-                computed_permission::Column::ScopeType
-                    .eq(computed_permission::PermissionScopeType::Channel),
-            )
-            .select_also(computed_permission::Entity)
-            .all(&self.context.db)
-            .await?;
-
-        Ok(rows)
-    }
 }

src/repositories/types.rs

@@ -1,4 +1,5 @@
-use crate::models::{category, channel, computed_permission};
+use crate::models::{category, channel, computed_permission, server_item_order};
+use crate::permissions::ChannelPermission;
 use uuid::Uuid;
 
 pub enum ServerExplorerItem {
@@ -56,3 +57,22 @@ impl PermissionResource {
         }
     }
 }
+
+#[derive(Debug, Clone)]
+pub struct CategoryWithPermissions {
+    pub category: category::Model,
+    pub permissions: Option<ChannelPermission>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ChannelWithPermissions {
+    pub channel: channel::Model,
+    pub permissions: Option<ChannelPermission>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ServerTreeData {
+    pub orders: Vec<server_item_order::Model>,
+    pub categories: Vec<CategoryWithPermissions>,
+    pub channels: Vec<ChannelWithPermissions>,
+}

src/routes/category/mapper.rs

@@ -1,17 +1,25 @@
-use crate::models::category;
 use crate::domain::dto::category::{
     CategoryResponse, CreateCategoryRequest, UpdateCategoryRequest,
 };
+use crate::models::category;
 use sea_orm::Set;
 use uuid::Uuid;
 
 pub fn category_model_to_category_response(model: category::Model) -> CategoryResponse {
+    category_model_to_category_response_with_permission(model, None)
+}
+
+pub fn category_model_to_category_response_with_permission(
+    model: category::Model,
+    permission: Option<u64>,
+) -> CategoryResponse {
     CategoryResponse {
         id: model.id,
         server_id: model.server_id,
         name: model.name,
         created_at: model.created_at,
         updated_at: model.updated_at,
+        permission,
     }
 }
 

src/routes/channel/mapper.rs

@@ -1,13 +1,20 @@
-use crate::models::{channel, channel_role_permission, channel_user_permission};
-use crate::repositories::types::ChannelFilter;
 use crate::domain::dto::channel::{
     ChannelQueryParams, ChannelResponse, ChannelRolePermissionResponse,
     ChannelUserPermissionResponse, CreateChannelRequest, UpdateChannelRequest,
 };
+use crate::models::{channel, channel_role_permission, channel_user_permission};
+use crate::repositories::types::ChannelFilter;
 use sea_orm::Set;
 use uuid::Uuid;
 
 pub fn channel_model_to_channel_response(model: channel::Model) -> ChannelResponse {
+    channel_model_to_channel_response_with_permission(model, None)
+}
+
+pub fn channel_model_to_channel_response_with_permission(
+    model: channel::Model,
+    permission: Option<u64>,
+) -> ChannelResponse {
     ChannelResponse {
         id: model.id,
         server_id: model.server_id,
@@ -16,6 +23,7 @@ pub fn channel_model_to_channel_response(model: channel::Model) -> ChannelRespon
         name: model.name,
         created_at: model.created_at,
         updated_at: model.updated_at,
+        permission,
     }
 }
 

src/routes/server/handlers.rs

@@ -3,9 +3,8 @@ use crate::domain::dto::server::{
     CreateServerRequest, ServerResponse, ServerRolePermissionResponse, ServerTreeResponse,
     ServerUserPermissionResponse, SetServerPermissionRequest, UpdateServerRequest,
 };
-use crate::http::context::Superuser;
+use crate::http::context::{CurrentUser, Superuser};
 use crate::http::error::HTTPError;
-use crate::repositories::types::ChannelFilter;
 use crate::routes::server::mapper;
 use axum::{
     Json,
@@ -384,6 +383,7 @@ pub async fn remove_role_permission(
     tag = "Servers"
 )]
 pub async fn get_tree(
+    user: CurrentUser,
     State(state): State<AppState>,
     Path(server_id): Path<Uuid>,
 ) -> Result<Json<ServerTreeResponse>, HTTPError> {
@@ -395,20 +395,15 @@ pub async fn get_tree(
         .await?
         .ok_or(HTTPError::NotFound)?;
 
-    // Exécution parallèle des 3 requêtes via leurs repositories respectifs
+    let tree = state
-    let (orders, channels, categories) = tokio::try_join!(
-        state
         .repositories
-            .server_item_order
+        .server_tree
-            .get_by_server(server_id),
+        .get_for_user(server_id, user.id)
-        state.repositories.channel.filter(ChannelFilter {
+        .await?;
-            server_id: Some(server_id)
-        }),
-        state.repositories.category.get_by_server(server_id),
-    )?;
 
-    // Assemblage du ServerTreeResponse via le mapper
+    Ok(Json(mapper::build_server_tree(
-    let tree = mapper::build_server_tree(orders, channels, categories);
+        tree.orders,
-
+        tree.channels,
-    Ok(Json(tree))
+        tree.categories,
+    )))
 }

src/routes/server/mapper.rs

@@ -2,11 +2,10 @@ use crate::domain::dto::server::{
     CreateServerRequest, ServerExplorerItemResponse, ServerResponse, ServerRolePermissionResponse,
     ServerTreeResponse, ServerUserPermissionResponse, UpdateServerRequest,
 };
-use crate::models::{
+use crate::models::{server, server_item_order, server_role_permission, server_user_permission};
-    category, channel, server, server_item_order, server_role_permission, server_user_permission,
+use crate::repositories::types::{CategoryWithPermissions, ChannelWithPermissions};
-};
+use crate::routes::category::mapper::category_model_to_category_response_with_permission;
-use crate::routes::category::mapper::category_model_to_category_response;
+use crate::routes::channel::mapper::channel_model_to_channel_response_with_permission;
-use crate::routes::channel::mapper::channel_model_to_channel_response;
 use sea_orm::Set;
 use std::collections::HashMap;
 use uuid::Uuid;
@@ -65,44 +64,53 @@ pub fn server_role_permission_to_response(
 
 pub fn build_server_tree(
     orders: Vec<server_item_order::Model>,
-    channels: Vec<channel::Model>,
+    channels: Vec<ChannelWithPermissions>,
-    categories: Vec<category::Model>,
+    categories: Vec<CategoryWithPermissions>,
 ) -> ServerTreeResponse {
-    // Map d'accès rapide : resource_id -> order_key
     let order_map: HashMap<Uuid, i64> = orders
         .into_iter()
-        .map(|o| (o.resource_id, o.order_key))
+        .map(|order| (order.resource_id, order.order_key))
         .collect();
 
-    // Regrouper les canaux par catégorie ou orphelins
+    let mut category_channels: HashMap<Uuid, Vec<ChannelWithPermissions>> = HashMap::new();
-    let mut category_channels: HashMap<Uuid, Vec<channel::Model>> = HashMap::new();
+    let mut orphan_channels: Vec<ChannelWithPermissions> = Vec::new();
-    let mut orphan_channels: Vec<channel::Model> = Vec::new();
 
-    for chan in channels {
+    for channel_with_permissions in channels {
-        if let Some(cat_id) = chan.category_id {
+        if let Some(category_id) = channel_with_permissions.channel.category_id {
-            category_channels.entry(cat_id).or_default().push(chan);
+            category_channels
+                .entry(category_id)
+                .or_default()
+                .push(channel_with_permissions);
         } else {
-            orphan_channels.push(chan);
+            orphan_channels.push(channel_with_permissions);
         }
     }
 
     // Trier les canaux dans chaque catégorie par leur order_key
     for chans in category_channels.values_mut() {
-        chans.sort_by_key(|c| order_map.get(&c.id).copied().unwrap_or(i64::MAX));
+        chans.sort_by_key(|c| order_map.get(&c.channel.id).copied().unwrap_or(i64::MAX));
     }
 
     // Préparer les éléments racine (catégories & canaux orphelins) avec leur order_key
     let mut root_items: Vec<(ServerExplorerItemResponse, i64)> = Vec::new();
 
-    for cat in categories {
+    for cat_with_perm in categories {
-        let cat_id = cat.id;
+        let cat_id = cat_with_perm.category.id;
         let order_key = order_map.get(&cat_id).copied().unwrap_or(i64::MAX);
         let chans = category_channels.remove(&cat_id).unwrap_or_default();
 
-        let cat_response = category_model_to_category_response(cat);
+        let cat_perm_bits = cat_with_perm.permissions.map(|p| p.bits()).unwrap_or(0);
+        let cat_response = category_model_to_category_response_with_permission(
+            cat_with_perm.category,
+            Some(cat_perm_bits),
+        );
+
         let chan_responses = chans
             .into_iter()
-            .map(channel_model_to_channel_response)
+            .map(|c| {
+                let chan_perm_bits = c.permissions.map(|p| p.bits()).unwrap_or(0);
+                channel_model_to_channel_response_with_permission(c.channel, Some(chan_perm_bits))
+            })
             .collect();
 
         root_items.push((
@@ -111,9 +119,16 @@ pub fn build_server_tree(
         ));
     }
 
-    for chan in orphan_channels {
+    for chan_with_perm in orphan_channels {
-        let order_key = order_map.get(&chan.id).copied().unwrap_or(i64::MAX);
+        let order_key = order_map
-        let chan_response = channel_model_to_channel_response(chan);
+            .get(&chan_with_perm.channel.id)
+            .copied()
+            .unwrap_or(i64::MAX);
+        let chan_perm_bits = chan_with_perm.permissions.map(|p| p.bits()).unwrap_or(0);
+        let chan_response = channel_model_to_channel_response_with_permission(
+            chan_with_perm.channel,
+            Some(chan_perm_bits),
+        );
         root_items.push((
             ServerExplorerItemResponse::Channel(chan_response),
             order_key,

src/services/channel.rs

@@ -1,9 +1,11 @@
-use crate::repositories::Repositories;
-use crate::services::ServicesContext;
 use crate::domain::dto::channel::{CreateChannelRequest, UpdateChannelRequest};
-use crate::models::channel;
+use crate::models::{channel, role};
-use event_bus::Scope;
+use crate::permissions::PermissionSet;
-use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, QueryFilter, QuerySelect, QueryOrder, TransactionTrait, Set, PaginatorTrait};
+use crate::services::ServicesContext;
+use crate::services::permission::PermissionService;
+use sea_orm::{
+    ActiveModelTrait, ColumnTrait, EntityTrait, QueryFilter, QuerySelect, Set, TransactionTrait,
+};
 use std::sync::Arc;
 use uuid::Uuid;
 
@@ -24,10 +26,10 @@ impl ChannelService {
         let db = &self.service_context.repositories.server.context.db;
         let event_bus = &self.service_context.event_bus;
 
-        // Start transaction
+        let channel = db
-        let txn = db.begin().await?;
+            .transaction::<_, channel::Model, anyhow::Error>(|txn| {
-
+                Box::pin(async move {
-        // 1. Insert channel within transaction
+                    // 1. Insertion du canal
                     let active_model = channel::ActiveModel {
                         server_id: Set(payload.server_id),
                         category_id: Set(payload.category_id),
@@ -36,17 +38,23 @@ impl ChannelService {
                         ..Default::default()
                     };
 
-        let channel = active_model.insert(&txn).await?;
+                    let channel = active_model.insert(txn).await?;
 
-        // 2. If server_id is present, insert into server_item_order within transaction
+                    // 2. Si server_id est présent, enregistrement de l'ordre d'affichage
                     if let Some(server_id) = payload.server_id {
-            // Get max order key or determine order key
+                        let max_order: Option<i64> =
-            let max_order: Option<i64> = crate::models::server_item_order::Entity::find()
+                            crate::models::server_item_order::Entity::find()
-                .filter(crate::models::server_item_order::Column::ServerId.eq(server_id))
+                                .filter(
+                                    crate::models::server_item_order::Column::ServerId
+                                        .eq(server_id),
+                                )
                                 .select_only()
-                .column_as(crate::models::server_item_order::Column::OrderKey.max(), "max_key")
+                                .column_as(
+                                    crate::models::server_item_order::Column::OrderKey.max(),
+                                    "max_key",
+                                )
                                 .into_tuple::<Option<i64>>()
-                .one(&txn)
+                                .one(txn)
                                 .await?
                                 .flatten();
 
@@ -55,16 +63,43 @@ impl ChannelService {
                         let order_item = crate::models::server_item_order::ActiveModel {
                             server_id: Set(server_id),
                             resource_id: Set(channel.id),
-                resource_type: Set(crate::models::server_item_order::OrderedResourceType::Channel),
+                            resource_type: Set(
+                                crate::models::server_item_order::OrderedResourceType::Channel,
+                            ),
                             parent_category_id: Set(payload.category_id),
                             order_key: Set(next_order),
                             ..Default::default()
                         };
-            order_item.insert(&txn).await?;
+                        order_item.insert(txn).await?;
+
+                        // 3. Attribution des permissions par défaut au rôle par défaut
+                        if let Some(default_role) = role::Entity::find()
+                            .filter(role::Column::ServerId.eq(server_id))
+                            .filter(role::Column::IsDefault.eq(true))
+                            .one(txn)
+                            .await?
+                        {
+                            let default_channel_permissions =
+                                PermissionSet::DEFAULT.channel.bits() as i64;
+
+                            let role_perm = crate::models::channel_role_permission::ActiveModel {
+                                channel_id: Set(channel.id),
+                                role_id: Set(default_role.id),
+                                permissions: Set(default_channel_permissions),
+                                ..Default::default()
+                            };
+                            role_perm.insert(txn).await?;
                         }
 
-        // Commit transaction
+                        // 4. Refresh des permissions (Global pour l'instant)
-        txn.commit().await?;
+                        // TODO: Cibler/focaliser le spectre du recalcul (ex: uniquement les membres impactés ou le canal spécifique)
+                        PermissionService::sync_server_with_db(txn, server_id).await?;
+                    }
+
+                    Ok(channel)
+                })
+            })
+            .await?;
 
         // Post-commit event emission
         event_bus.emit("channel_created", channel.clone());
@@ -126,9 +161,7 @@ impl ChannelService {
             .exec(&txn)
             .await?;
 
-        let res = channel::Entity::delete_by_id(id)
+        let res = channel::Entity::delete_by_id(id).exec(&txn).await?;
-            .exec(&txn)
-            .await?;
 
         let deleted = res.rows_affected > 0;
 
@@ -173,7 +206,10 @@ impl ChannelService {
 
         txn.commit().await?;
 
-        event_bus.emit("channel_user_permission_created", (channel_id, user_id, permissions));
+        event_bus.emit(
+            "channel_user_permission_created",
+            (channel_id, user_id, permissions),
+        );
 
         Ok(())
     }
@@ -233,7 +269,10 @@ impl ChannelService {
 
         txn.commit().await?;
 
-        event_bus.emit("channel_role_permission_created", (channel_id, role_id, permissions));
+        event_bus.emit(
+            "channel_role_permission_created",
+            (channel_id, role_id, permissions),
+        );
 
         Ok(())
     }

src/services/mod.rs

@@ -1,23 +1,25 @@
 use crate::repositories::Repositories;
-use crate::services::permission_sync::PermissionSyncService;
-use crate::services::server_order::ServerOrderService;
-use crate::services::channel::ChannelService;
-use crate::services::server::ServerService;
 use crate::services::category::CategoryService;
+use crate::services::channel::ChannelService;
 use crate::services::message::MessageService;
-use crate::services::user::UserService;
+use crate::services::permission::PermissionService;
+use crate::services::permission_sync::PermissionSyncService;
 use crate::services::role::RoleService;
+use crate::services::server::ServerService;
+use crate::services::server_order::ServerOrderService;
+use crate::services::user::UserService;
 use event_bus::EventBus;
 use std::sync::{Arc, OnceLock};
 
-pub mod permission_sync;
-mod server_order;
-pub mod channel;
-pub mod server;
 pub mod category;
+pub mod channel;
 pub mod message;
-pub mod user;
+mod permission;
+pub mod permission_sync;
 pub mod role;
+pub mod server;
+mod server_order;
+pub mod user;
 
 #[derive(Debug, Clone)]
 pub struct ServicesContext {
@@ -36,6 +38,7 @@ pub struct Services {
     pub message: Arc<MessageService>,
     pub user: Arc<UserService>,
     pub role: Arc<RoleService>,
+    pub permission: Arc<PermissionService>,
 }
 
 impl Services {
@@ -53,6 +56,7 @@ impl Services {
         let message = Arc::new(MessageService::new(service_context.clone()));
         let user = Arc::new(UserService::new(service_context.clone()));
         let role = Arc::new(RoleService::new(service_context.clone()));
+        let permission = Arc::new(PermissionService::new(service_context.clone()));
 
         let services = Self {
             permission_sync,
@@ -63,6 +67,7 @@ impl Services {
             message,
             user,
             role,
+            permission,
         };
         let _ = service_context.services.set(services.clone());
         services

src/services/permission.rs

@@ -0,0 +1,438 @@
+use crate::models::computed_permission::PermissionScopeType;
+use crate::models::{
+    channel, channel_role_permission, channel_user_permission, computed_permission, role_user,
+    server_role_permission, server_user, server_user_permission,
+};
+use crate::permissions::{ChannelPermission, ServerPermission};
+use crate::services::ServicesContext;
+use sea_orm::{ColumnTrait, ConnectionTrait, EntityTrait, QueryFilter, QuerySelect, Set};
+use std::collections::HashMap;
+use std::sync::Arc;
+use uuid::Uuid;
+
+#[derive(Debug, Clone)]
+pub struct PermissionService {
+    service_context: Arc<ServicesContext>,
+}
+
+impl PermissionService {
+    pub fn new(service_context: Arc<ServicesContext>) -> Self {
+        Self { service_context }
+    }
+
+    /// Recalcule de manière globale et optimisée `computed_permission` pour TOUS les utilisateurs
+    /// et TOUTES les ressources d'un serveur donné.
+    pub async fn sync_server(&self, server_id: Uuid) -> Result<(), anyhow::Error> {
+        let db = &self.service_context.repositories.server.context.db;
+        Self::sync_server_with_db(db, server_id).await
+    }
+
+    /// Recalcule TOUTES les entrées `computed_permission` d'un utilisateur sur un serveur.
+    pub async fn sync_user(&self, user_id: Uuid, server_id: Uuid) -> Result<(), anyhow::Error> {
+        let db = &self.service_context.repositories.server.context.db;
+        Self::sync_user_with_db(db, user_id, server_id).await
+    }
+
+    /// Recalcule le `computed_permission` pour UN utilisateur et UN canal spécifique.
+    pub async fn sync_channel_user_permission(
+        &self,
+        channel_id: Uuid,
+        user_id: Uuid,
+    ) -> Result<(), anyhow::Error> {
+        let db = &self.service_context.repositories.server.context.db;
+        Self::sync_channel_user_permission_with_db(db, channel_id, user_id).await
+    }
+}
+
+impl PermissionService {
+    pub async fn sync_server_with_db<C>(db: &C, server_id: Uuid) -> Result<(), anyhow::Error>
+    where
+        C: ConnectionTrait,
+    {
+        // 1. Charger tous les canaux du serveur
+        let channels = channel::Entity::find()
+            .filter(channel::Column::ServerId.eq(server_id))
+            .all(db)
+            .await?;
+
+        let channel_ids: Vec<Uuid> = channels.iter().map(|c| c.id).collect();
+
+        // 2. Charger tous les utilisateurs du serveur
+        let user_ids: Vec<Uuid> = server_user::Entity::find()
+            .filter(server_user::Column::ServerId.eq(server_id))
+            .select_only()
+            .column(server_user::Column::UserId)
+            .into_tuple::<Uuid>()
+            .all(db)
+            .await?;
+
+        if user_ids.is_empty() {
+            // Aucun membre, nettoyer simplement le cache de ce serveur
+            computed_permission::Entity::delete_many()
+                .filter(computed_permission::Column::ServerId.eq(server_id))
+                .exec(db)
+                .await?;
+            return Ok(());
+        }
+
+        // 3. Charger en lot toutes les affectations de rôles des membres
+        let user_roles_models = role_user::Entity::find()
+            .filter(role_user::Column::UserId.is_in(user_ids.clone()))
+            .all(db)
+            .await?;
+
+        let mut roles_by_user: HashMap<Uuid, Vec<Uuid>> = HashMap::new();
+        for ur in user_roles_models {
+            roles_by_user
+                .entry(ur.user_id)
+                .or_default()
+                .push(ur.role_id);
+        }
+
+        // 4. Charger toutes les permissions serveur (Rôles & Utilisateurs)
+        let server_role_perms = server_role_permission::Entity::find()
+            .filter(server_role_permission::Column::ServerId.eq(server_id))
+            .all(db)
+            .await?;
+
+        let mut server_perm_by_role: HashMap<Uuid, ServerPermission> = HashMap::new();
+        for srp in server_role_perms {
+            server_perm_by_role.insert(
+                srp.role_id,
+                ServerPermission::from_bits_retain(srp.permissions as u64),
+            );
+        }
+
+        let server_user_perms = server_user_permission::Entity::find()
+            .filter(server_user_permission::Column::ServerId.eq(server_id))
+            .filter(server_user_permission::Column::UserId.is_in(user_ids.clone()))
+            .all(db)
+            .await?;
+
+        let mut server_perm_by_user: HashMap<Uuid, ServerPermission> = HashMap::new();
+        for sup in server_user_perms {
+            server_perm_by_user.insert(
+                sup.user_id,
+                ServerPermission::from_bits_retain(sup.permissions as u64),
+            );
+        }
+
+        // 5. Charger toutes les permissions de canaux (Rôles & Utilisateurs)
+        let channel_role_perms = if channel_ids.is_empty() {
+            Vec::new()
+        } else {
+            channel_role_permission::Entity::find()
+                .filter(channel_role_permission::Column::ChannelId.is_in(channel_ids.clone()))
+                .all(db)
+                .await?
+        };
+
+        let mut channel_role_perm_map: HashMap<(Uuid, Uuid), ChannelPermission> = HashMap::new();
+        for crp in channel_role_perms {
+            channel_role_perm_map.insert(
+                (crp.channel_id, crp.role_id),
+                ChannelPermission::from_bits_retain(crp.permissions as u64),
+            );
+        }
+
+        let channel_user_perms = if channel_ids.is_empty() {
+            Vec::new()
+        } else {
+            channel_user_permission::Entity::find()
+                .filter(channel_user_permission::Column::ChannelId.is_in(channel_ids.clone()))
+                .filter(channel_user_permission::Column::UserId.is_in(user_ids.clone()))
+                .all(db)
+                .await?
+        };
+
+        let mut channel_user_perm_map: HashMap<(Uuid, Uuid), ChannelPermission> = HashMap::new();
+        for cup in channel_user_perms {
+            channel_user_perm_map.insert(
+                (cup.channel_id, cup.user_id),
+                ChannelPermission::from_bits_retain(cup.permissions as u64),
+            );
+        }
+
+        // 6. Calcul en RAM pour l'ensemble des paires (Utilisateur x Ressource)
+        let mut to_insert: Vec<computed_permission::ActiveModel> = Vec::new();
+
+        for user_id in user_ids {
+            let user_roles = roles_by_user.get(&user_id);
+
+            // A. Permission Serveur
+            let mut final_server_perm = ServerPermission::empty();
+            if let Some(roles) = user_roles {
+                for role_id in roles {
+                    if let Some(p) = server_perm_by_role.get(role_id) {
+                        final_server_perm |= *p;
+                    }
+                }
+            }
+            if let Some(p) = server_perm_by_user.get(&user_id) {
+                final_server_perm |= *p;
+            }
+
+            to_insert.push(computed_permission::ActiveModel {
+                user_id: Set(user_id),
+                server_id: Set(server_id),
+                scope_type: Set(PermissionScopeType::Server),
+                resource_id: Set(server_id),
+                permissions: Set(final_server_perm.bits() as i64),
+                ..Default::default()
+            });
+
+            // B. Permissions par Canal
+            for channel in &channels {
+                let mut final_channel_perm = ChannelPermission::empty();
+
+                if let Some(roles) = user_roles {
+                    for role_id in roles {
+                        if let Some(p) = channel_role_perm_map.get(&(channel.id, *role_id)) {
+                            final_channel_perm |= *p;
+                        }
+                    }
+                }
+
+                if let Some(p) = channel_user_perm_map.get(&(channel.id, user_id)) {
+                    final_channel_perm |= *p;
+                }
+
+                to_insert.push(computed_permission::ActiveModel {
+                    user_id: Set(user_id),
+                    server_id: Set(server_id),
+                    scope_type: Set(PermissionScopeType::Channel),
+                    resource_id: Set(channel.id),
+                    permissions: Set(final_channel_perm.bits() as i64),
+                    ..Default::default()
+                });
+            }
+        }
+
+        // 7. Remplacement atomique complet pour le serveur en BDD
+        computed_permission::Entity::delete_many()
+            .filter(computed_permission::Column::ServerId.eq(server_id))
+            .exec(db)
+            .await?;
+
+        if !to_insert.is_empty() {
+            // Insertion par lots (chunking de 1000 pour éviter les limites de paramètres SQL)
+            for chunk in to_insert.chunks(1000) {
+                computed_permission::Entity::insert_many(chunk.to_vec())
+                    .exec(db)
+                    .await?;
+            }
+        }
+
+        Ok(())
+    }
+
+    pub async fn sync_user_with_db<C>(
+        db: &C,
+        user_id: Uuid,
+        server_id: Uuid,
+    ) -> Result<(), anyhow::Error>
+    where
+        C: ConnectionTrait,
+    {
+        // 1. Rôles de l'utilisateur
+        let role_ids = role_user::Entity::find()
+            .filter(role_user::Column::UserId.eq(user_id))
+            .select_only()
+            .column(role_user::Column::RoleId)
+            .into_tuple::<Uuid>()
+            .all(db)
+            .await?;
+
+        // 2. Permissions serveur des rôles
+        let mut server_permissions = ServerPermission::empty();
+        if !role_ids.is_empty() {
+            let role_permissions = server_role_permission::Entity::find()
+                .filter(server_role_permission::Column::ServerId.eq(server_id))
+                .filter(server_role_permission::Column::RoleId.is_in(role_ids.clone()))
+                .all(db)
+                .await?;
+
+            for permission in role_permissions {
+                server_permissions |=
+                    ServerPermission::from_bits_retain(permission.permissions as u64);
+            }
+        }
+
+        // 3. Permissions serveur directes
+        if let Some(permission) = server_user_permission::Entity::find()
+            .filter(server_user_permission::Column::ServerId.eq(server_id))
+            .filter(server_user_permission::Column::UserId.eq(user_id))
+            .one(db)
+            .await?
+        {
+            server_permissions |= ServerPermission::from_bits_retain(permission.permissions as u64);
+        }
+
+        // 4. Canaux du serveur
+        let channels = channel::Entity::find()
+            .filter(channel::Column::ServerId.eq(server_id))
+            .all(db)
+            .await?;
+
+        let channel_ids: Vec<Uuid> = channels.iter().map(|c| c.id).collect();
+
+        // 5. Permissions de rôles pour les canaux
+        let role_channel_permissions = if role_ids.is_empty() || channel_ids.is_empty() {
+            Vec::new()
+        } else {
+            channel_role_permission::Entity::find()
+                .filter(channel_role_permission::Column::ChannelId.is_in(channel_ids.clone()))
+                .filter(channel_role_permission::Column::RoleId.is_in(role_ids))
+                .all(db)
+                .await?
+        };
+
+        let mut permissions_by_channel: HashMap<Uuid, ChannelPermission> = HashMap::new();
+        for permission in role_channel_permissions {
+            permissions_by_channel
+                .entry(permission.channel_id)
+                .or_default()
+                .insert(ChannelPermission::from_bits_retain(
+                    permission.permissions as u64,
+                ));
+        }
+
+        // 6. Permissions directes utilisateur pour les canaux
+        let user_channel_permissions = if channel_ids.is_empty() {
+            Vec::new()
+        } else {
+            channel_user_permission::Entity::find()
+                .filter(channel_user_permission::Column::UserId.eq(user_id))
+                .filter(channel_user_permission::Column::ChannelId.is_in(channel_ids))
+                .all(db)
+                .await?
+        };
+
+        for permission in user_channel_permissions {
+            permissions_by_channel
+                .entry(permission.channel_id)
+                .or_default()
+                .insert(ChannelPermission::from_bits_retain(
+                    permission.permissions as u64,
+                ));
+        }
+
+        // 7. Modèles à insérer
+        let mut computed_permissions = Vec::with_capacity(channels.len().saturating_add(1));
+
+        computed_permissions.push(computed_permission::ActiveModel {
+            user_id: Set(user_id),
+            server_id: Set(server_id),
+            scope_type: Set(PermissionScopeType::Server),
+            resource_id: Set(server_id),
+            permissions: Set(server_permissions.bits() as i64),
+            ..Default::default()
+        });
+
+        for channel in channels {
+            let channel_permissions = permissions_by_channel
+                .remove(&channel.id)
+                .unwrap_or_else(ChannelPermission::empty);
+
+            computed_permissions.push(computed_permission::ActiveModel {
+                user_id: Set(user_id),
+                server_id: Set(server_id),
+                scope_type: Set(PermissionScopeType::Channel),
+                resource_id: Set(channel.id),
+                permissions: Set(channel_permissions.bits() as i64),
+                ..Default::default()
+            });
+        }
+
+        // 8. Remplacement atomique BDD
+        computed_permission::Entity::delete_many()
+            .filter(computed_permission::Column::UserId.eq(user_id))
+            .filter(computed_permission::Column::ServerId.eq(server_id))
+            .exec(db)
+            .await?;
+
+        if !computed_permissions.is_empty() {
+            computed_permission::Entity::insert_many(computed_permissions)
+                .exec(db)
+                .await?;
+        }
+
+        Ok(())
+    }
+
+    pub async fn sync_channel_user_permission_with_db<C>(
+        db: &C,
+        channel_id: Uuid,
+        user_id: Uuid,
+    ) -> Result<(), anyhow::Error>
+    where
+        C: ConnectionTrait,
+    {
+        // 1. Récupérer le canal pour connaître son server_id
+        let channel = channel::Entity::find_by_id(channel_id)
+            .one(db)
+            .await?
+            .ok_or_else(|| anyhow::anyhow!("Canal non trouvé"))?;
+
+        let server_id = match channel.server_id {
+            Some(sid) => sid,
+            None => return Ok(()), // Canal DM ou sans serveur
+        };
+
+        // 2. Rôles de l'utilisateur sur le serveur
+        let role_ids = role_user::Entity::find()
+            .filter(role_user::Column::UserId.eq(user_id))
+            .select_only()
+            .column(role_user::Column::RoleId)
+            .into_tuple::<Uuid>()
+            .all(db)
+            .await?;
+
+        // 3. Permissions cumulées des rôles sur ce canal
+        let mut computed = ChannelPermission::empty();
+
+        if !role_ids.is_empty() {
+            let role_perms = channel_role_permission::Entity::find()
+                .filter(channel_role_permission::Column::ChannelId.eq(channel_id))
+                .filter(channel_role_permission::Column::RoleId.is_in(role_ids))
+                .all(db)
+                .await?;
+
+            for p in role_perms {
+                computed |= ChannelPermission::from_bits_retain(p.permissions as u64);
+            }
+        }
+
+        // 4. Override direct utilisateur sur le canal
+        if let Some(user_perm) = channel_user_permission::Entity::find()
+            .filter(channel_user_permission::Column::ChannelId.eq(channel_id))
+            .filter(channel_user_permission::Column::UserId.eq(user_id))
+            .one(db)
+            .await?
+        {
+            computed |= ChannelPermission::from_bits_retain(user_perm.permissions as u64);
+        }
+
+        // 5. Suppression & insertion atomique de l'entrée computed_permission
+        computed_permission::Entity::delete_many()
+            .filter(computed_permission::Column::UserId.eq(user_id))
+            .filter(computed_permission::Column::ResourceId.eq(channel_id))
+            .exec(db)
+            .await?;
+
+        let active_model = computed_permission::ActiveModel {
+            user_id: Set(user_id),
+            server_id: Set(server_id),
+            scope_type: Set(PermissionScopeType::Channel),
+            resource_id: Set(channel_id),
+            permissions: Set(computed.bits() as i64),
+            ..Default::default()
+        };
+
+        computed_permission::Entity::insert(active_model)
+            .exec(db)
+            .await?;
+
+        Ok(())
+    }
+}