Can delete group

src/helpers/account_helper.rs

@@ -300,7 +300,7 @@ pub fn export(user_id: &UserID) -> ResultBoxError<AccountExport> {
 }
 
 /// Delete a user's account
-pub fn delete(user_id: &UserID) -> ResultBoxError {
+pub fn delete(_user_id: &UserID) -> ResultBoxError {
     // TODO : close all websockets of user
 
     // TODO : Delete all group membership

src/helpers/groups_helper.rs

@@ -9,7 +9,8 @@ use crate::data::group_id::GroupID;
 use crate::data::group_member::{GroupMember, GroupMembershipLevel};
 use crate::data::new_group::NewGroup;
 use crate::data::user::UserID;
-use crate::helpers::{database, posts_helper};
+use crate::helpers::{database, likes_helper, notifications_helper, posts_helper};
+use crate::helpers::likes_helper::LikeType;
 use crate::utils::date_utils::time;
 
 impl GroupVisibilityLevel {
@@ -462,6 +463,32 @@ pub fn can_user_create_posts(group_id: &GroupID, user_id: &UserID) -> ResultBoxE
     }
 }
 
+/// Delete a group
+pub fn delete(group_id: &GroupID) -> ResultBoxError {
+    // Delete all likes of the group
+    likes_helper::delete_all(group_id.id(), LikeType::GROUP)?;
+
+    // Delete the logo of the group
+    delete_logo(group_id)?;
+
+    // Delete all group posts
+    posts_helper::delete_all_group(group_id)?;
+
+    // Delete all group related notifications
+    notifications_helper::delete_all_related_with_group(group_id)?;
+
+    // Delete all group members
+    database::DeleteQuery::new(GROUPS_MEMBERS_TABLE)
+        .cond_group_id("groups_id", group_id)
+        .exec()?;
+
+    // Delete group information
+    database::DeleteQuery::new(GROUPS_LIST_TABLE)
+        .cond_group_id("id", group_id)
+        .exec()
+}
+
+
 /// Turn a database entry into a group struct
 fn db_to_group(row: &database::RowResult) -> ResultBoxError<Group> {
     let group_id = row.get_group_id("id")?;

src/helpers/notifications_helper.rs

@@ -6,6 +6,7 @@ use std::collections::HashMap;
 
 use crate::constants::database_tables_names::NOTIFICATIONS_TABLE;
 use crate::data::error::ResultBoxError;
+use crate::data::group_id::GroupID;
 use crate::data::notification::{NotifElemType, NotifEventType, NotifEventVisibility, Notification, PartialNotification};
 use crate::data::user::UserID;
 use crate::helpers::database;
@@ -26,6 +27,19 @@ pub fn delete_all_user(user_id: &UserID) -> ResultBoxError {
     delete(&PartialNotification::new().set_dest_user_id(user_id))
 }
 
+/// Delete all the notifications related with a group
+pub fn delete_all_related_with_group(group_id: &GroupID) -> ResultBoxError {
+    delete(&PartialNotification::new()
+        .set_on_elem_type(NotifElemType::GROUP_MEMBERSHIP)
+        .set_on_elem_id(group_id.id())
+    )?;
+
+    delete(&PartialNotification::new()
+        .set_on_elem_type(NotifElemType::GROUP_PAGE)
+        .set_on_elem_id(group_id.id())
+    )
+}
+
 /// Check out whether a similar notification exists for given specifications
 pub fn similar_exists(n: &PartialNotification) -> ResultBoxError<bool> {
     database::QueryInfo::new(NOTIFICATIONS_TABLE)

src/helpers/posts_helper.rs

@@ -334,6 +334,13 @@ pub fn export_all_posts_user(user_id: &UserID) -> ResultBoxError<Vec<Post>> {
         .exec(db_to_post)
 }
 
+/// Get the entire list of posts of a given group
+pub fn export_all_posts_group(group_id: &GroupID) -> ResultBoxError<Vec<Post>> {
+    database::QueryInfo::new(POSTS_TABLE)
+        .cond_group_id("group_id", group_id)
+        .exec(db_to_post)
+}
+
 /// Get the access level of a user over a post
 pub fn get_access_level(p: &Post, user_id: &Option<UserID>) -> ResultBoxError<PostAccessLevel> {
     if user_id == &p.user_id.as_option() {
@@ -450,6 +457,15 @@ pub fn delete(p: &Post) -> ResultBoxError {
     Ok(())
 }
 
+/// Delete all the posts related with a group
+pub fn delete_all_group(group_id: &GroupID) -> ResultBoxError {
+    for post in export_all_posts_group(group_id)? {
+        delete(&post)?;
+    }
+
+    Ok(())
+}
+
 /// Get all the posts that use of movie
 pub fn get_posts_for_movie(m: &Movie) -> ResultBoxError<Vec<Post>> {
     database::QueryInfo::new(POSTS_TABLE)