From 402ef2f83af31aec7adc93c0aee63eefdb841999 Mon Sep 17 00:00:00 2001
From: Valentin Tolmer <valentin@tolmer.fr>
Date: Fri, 24 Sep 2021 11:12:50 +0200
Subject: [PATCH] app: Add a component to delete a user

Also adds a way to hook to the bootstrap modals to show or hide them.
---
 app/index.html                    |   4 +
 app/queries/delete_user.graphql   |   5 +
 app/src/components/delete_user.rs | 156 ++++++++++++++++++++++++++++++
 app/src/components/mod.rs         |   1 +
 app/src/components/user_table.rs  |  94 +++++++++++++-----
 app/src/infra/mod.rs              |   1 +
 app/src/infra/modal.rs            |  16 +++
 7 files changed, 253 insertions(+), 24 deletions(-)
 create mode 100644 app/queries/delete_user.graphql
 create mode 100644 app/src/components/delete_user.rs
 create mode 100644 app/src/infra/modal.rs

diff --git a/app/index.html b/app/index.html
index b83fc53..c6c9d5f 100644
--- a/app/index.html
+++ b/app/index.html
@@ -11,6 +11,10 @@
       integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x"
       crossorigin="anonymous"
       as="style" />
+    <script
+      src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/js/bootstrap.bundle.min.js"
+      integrity="sha384-/bQdsTh/da6pkI1MST/rWKFNjaCP5gBSY4sEBT38Q/9RBh9AH40zEOg7Hlq2THRZ"
+      crossorigin="anonymous"></script>
     <link
       rel="stylesheet"
       href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.5.0/font/bootstrap-icons.css"
diff --git a/app/queries/delete_user.graphql b/app/queries/delete_user.graphql
new file mode 100644
index 0000000..b26b111
--- /dev/null
+++ b/app/queries/delete_user.graphql
@@ -0,0 +1,5 @@
+mutation DeleteUserQuery($user: String!) {
+  deleteUser(userId: $user) {
+    ok
+  }
+}
diff --git a/app/src/components/delete_user.rs b/app/src/components/delete_user.rs
new file mode 100644
index 0000000..48b0436
--- /dev/null
+++ b/app/src/components/delete_user.rs
@@ -0,0 +1,156 @@
+use crate::infra::{api::HostService, modal::Modal};
+use anyhow::{Error, Result};
+use graphql_client::GraphQLQuery;
+use yew::prelude::*;
+use yew::services::fetch::FetchTask;
+use yewtil::NeqAssign;
+
+#[derive(GraphQLQuery)]
+#[graphql(
+    schema_path = "../schema.graphql",
+    query_path = "queries/delete_user.graphql",
+    response_derives = "Debug",
+    custom_scalars_module = "crate::infra::graphql"
+)]
+pub struct DeleteUserQuery;
+
+pub struct DeleteUser {
+    link: ComponentLink<Self>,
+    props: DeleteUserProps,
+    node_ref: NodeRef,
+    modal: Option<Modal>,
+    _task: Option<FetchTask>,
+}
+
+#[derive(yew::Properties, Clone, PartialEq, Debug)]
+pub struct DeleteUserProps {
+    pub username: String,
+    pub on_user_deleted: Callback<String>,
+    pub on_error: Callback<Error>,
+}
+
+pub enum Msg {
+    ClickedDeleteUser,
+    ConfirmDeleteUser,
+    DismissModal,
+    DeleteUserResponse(Result<delete_user_query::ResponseData>),
+}
+
+impl Component for DeleteUser {
+    type Message = Msg;
+    type Properties = DeleteUserProps;
+
+    fn create(props: Self::Properties, link: ComponentLink<Self>) -> Self {
+        Self {
+            link,
+            props,
+            node_ref: NodeRef::default(),
+            modal: None,
+            _task: None,
+        }
+    }
+
+    fn rendered(&mut self, first_render: bool) {
+        if first_render {
+            self.modal = Some(Modal::new(
+                self.node_ref
+                    .cast::<web_sys::Element>()
+                    .expect("Modal node is not an element"),
+            ));
+        }
+    }
+
+    fn update(&mut self, msg: Self::Message) -> ShouldRender {
+        match msg {
+            Msg::ClickedDeleteUser => {
+                self.modal.as_ref().expect("modal not initialized").show();
+            }
+            Msg::ConfirmDeleteUser => {
+                self.update(Msg::DismissModal);
+                self._task = HostService::graphql_query::<DeleteUserQuery>(
+                    delete_user_query::Variables {
+                        user: self.props.username.clone(),
+                    },
+                    self.link.callback(Msg::DeleteUserResponse),
+                    "Error trying to delete user",
+                )
+                .map_err(|e| self.props.on_error.emit(e))
+                .ok();
+            }
+            Msg::DismissModal => {
+                self.modal.as_ref().expect("modal not initialized").hide();
+            }
+            Msg::DeleteUserResponse(response) => {
+                if let Err(e) = response {
+                    self.props.on_error.emit(e);
+                } else {
+                    self.props.on_user_deleted.emit(self.props.username.clone());
+                }
+            }
+        }
+        true
+    }
+
+    fn change(&mut self, props: Self::Properties) -> ShouldRender {
+        self.props.neq_assign(props)
+    }
+
+    fn view(&self) -> Html {
+        html! {
+          <>
+          <button
+            class="btn btn-danger"
+            onclick=self.link.callback(|_| Msg::ClickedDeleteUser)>
+            <i class="bi-x-circle-fill" aria-label="Delete user" />
+          </button>
+          {self.show_modal()}
+          </>
+        }
+    }
+}
+
+impl DeleteUser {
+    fn show_modal(&self) -> Html {
+        html! {
+          <div
+            class="modal fade"
+            id="exampleModal".to_string() + &self.props.username
+            tabindex="-1"
+            //role="dialog"
+            aria-labelledby="exampleModalLabel"
+            aria-hidden="true"
+            ref=self.node_ref.clone()>
+            <div class="modal-dialog" /*role="document"*/>
+              <div class="modal-content">
+                <div class="modal-header">
+                  <h5 class="modal-title" id="exampleModalLabel">{"Delete user?"}</h5>
+                  <button
+                    type="button"
+                    class="btn-close"
+                    aria-label="Close"
+                    onclick=self.link.callback(|_| Msg::DismissModal) />
+                </div>
+                <div class="modal-body">
+                <span>
+                  {"Are you sure you want to delete user "}
+                  <b>{&self.props.username}</b>{"?"}
+                </span>
+                </div>
+                <div class="modal-footer">
+                  <button
+                    type="button"
+                    class="btn btn-secondary"
+                    onclick=self.link.callback(|_| Msg::DismissModal)>
+                      {"Cancel"}
+                  </button>
+                  <button
+                    type="button"
+                    onclick=self.link.callback(|_| Msg::ConfirmDeleteUser)
+                    class="btn btn-danger">{"Yes, I'm sure"}</button>
+                </div>
+              </div>
+            </div>
+          </div>
+        }
+    }
+}
diff --git a/app/src/components/mod.rs b/app/src/components/mod.rs
index 77f0244..e0b7a94 100644
--- a/app/src/components/mod.rs
+++ b/app/src/components/mod.rs
@@ -2,6 +2,7 @@ pub mod add_user_to_group;
 pub mod app;
 pub mod change_password;
 pub mod create_user;
+pub mod delete_user;
 pub mod login;
 pub mod logout;
 pub mod remove_user_from_group;
diff --git a/app/src/components/user_table.rs b/app/src/components/user_table.rs
index 80df507..e896a5e 100644
--- a/app/src/components/user_table.rs
+++ b/app/src/components/user_table.rs
@@ -1,8 +1,11 @@
 use crate::{
-    components::router::{AppRoute, Link},
+    components::{
+        delete_user::DeleteUser,
+        router::{AppRoute, Link},
+    },
     infra::api::HostService,
 };
-use anyhow::{anyhow, Result};
+use anyhow::{Error, Result};
 use graphql_client::GraphQLQuery;
 use yew::prelude::*;
 use yew::services::{fetch::FetchTask, ConsoleService};
@@ -22,13 +25,16 @@ type User = list_users_query::ListUsersQueryUsers;
 
 pub struct UserTable {
     link: ComponentLink<Self>,
-    users: Option<Result<Vec<User>>>,
+    users: Option<Vec<User>>,
+    error: Option<Error>,
     // Used to keep the request alive long enough.
     _task: Option<FetchTask>,
 }
 
 pub enum Msg {
     ListUsersResponse(Result<ResponseData>),
+    OnUserDeleted(String),
+    OnError(Error),
 }
 
 impl UserTable {
@@ -55,21 +61,21 @@ impl Component for UserTable {
             link,
             _task: None,
             users: None,
+            error: None,
         };
         table.get_users(None);
         table
     }
 
     fn update(&mut self, msg: Self::Message) -> ShouldRender {
-        match msg {
-            Msg::ListUsersResponse(Ok(users)) => {
-                self.users = Some(Ok(users.users.into_iter().collect()));
-                true
-            }
-            Msg::ListUsersResponse(Err(e)) => {
-                self.users = Some(Err(anyhow!("Error listing users: {}", e)));
+        self.error = None;
+        match self.handle_msg(msg) {
+            Err(e) => {
+                ConsoleService::error(&e.to_string());
+                self.error = Some(e);
                 true
             }
+            Ok(b) => b,
         }
     }
 
@@ -78,18 +84,32 @@ impl Component for UserTable {
     }
 
     fn view(&self) -> Html {
-        let make_user_row = |user: &User| {
-            html! {
-                <tr>
-                    <td><Link route=AppRoute::UserDetails(user.id.clone())>{&user.id}</Link></td>
-                    <td>{&user.email}</td>
-                    <td>{&user.display_name}</td>
-                    <td>{&user.first_name}</td>
-                    <td>{&user.last_name}</td>
-                    <td>{&user.creation_date.with_timezone(&chrono::Local)}</td>
-                </tr>
+        html! {
+            <div>
+              {self.view_users()}
+              {self.view_errors()}
+            </div>
+        }
+    }
+}
+
+impl UserTable {
+    fn handle_msg(&mut self, msg: <Self as Component>::Message) -> Result<bool> {
+        match msg {
+            Msg::ListUsersResponse(users) => {
+                self.users = Some(users?.users.into_iter().collect());
+                Ok(true)
             }
-        };
+            Msg::OnError(e) => Err(e),
+            Msg::OnUserDeleted(user_id) => {
+                debug_assert!(self.users.is_some());
+                self.users.as_mut().unwrap().retain(|u| u.id != user_id);
+                Ok(true)
+            }
+        }
+    }
+
+    fn view_users(&self) -> Html {
         let make_table = |users: &Vec<User>| {
             html! {
                 <div class="table-responsive">
@@ -102,10 +122,11 @@ impl Component for UserTable {
                         <th>{"First name"}</th>
                         <th>{"Last name"}</th>
                         <th>{"Creation date"}</th>
+                        <th>{"Delete"}</th>
                       </tr>
                     </thead>
                     <tbody>
-                      {users.iter().map(make_user_row).collect::<Vec<_>>()}
+                      {users.iter().map(|u| self.view_user(u)).collect::<Vec<_>>()}
                     </tbody>
                   </table>
                 </div>
@@ -113,8 +134,33 @@ impl Component for UserTable {
         };
         match &self.users {
             None => html! {{"Loading..."}},
-            Some(Err(e)) => html! {<div>{"Error: "}{e.to_string()}</div>},
-            Some(Ok(users)) => make_table(users),
+            Some(users) => make_table(users),
+        }
+    }
+
+    fn view_user(&self, user: &User) -> Html {
+        html! {
+          <tr key=user.id.clone()>
+              <td><Link route=AppRoute::UserDetails(user.id.clone())>{&user.id}</Link></td>
+              <td>{&user.email}</td>
+              <td>{&user.display_name}</td>
+              <td>{&user.first_name}</td>
+              <td>{&user.last_name}</td>
+              <td>{&user.creation_date.with_timezone(&chrono::Local)}</td>
+              <td>
+                <DeleteUser
+                  username=user.id.clone()
+                  on_user_deleted=self.link.callback(Msg::OnUserDeleted)
+                  on_error=self.link.callback(Msg::OnError)/>
+              </td>
+          </tr>
+        }
+    }
+
+    fn view_errors(&self) -> Html {
+        match &self.error {
+            None => html! {},
+            Some(e) => html! {<div>{"Error: "}{e.to_string()}</div>},
         }
     }
 }
diff --git a/app/src/infra/mod.rs b/app/src/infra/mod.rs
index f8e9611..3615653 100644
--- a/app/src/infra/mod.rs
+++ b/app/src/infra/mod.rs
@@ -1,3 +1,4 @@
 pub mod api;
 pub mod cookies;
 pub mod graphql;
+pub mod modal;
diff --git a/app/src/infra/modal.rs b/app/src/infra/modal.rs
new file mode 100644
index 0000000..9aa9565
--- /dev/null
+++ b/app/src/infra/modal.rs
@@ -0,0 +1,16 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen(module = "bootstrap")]
+extern "C" {
+    #[wasm_bindgen]
+    pub type Modal;
+
+    #[wasm_bindgen(constructor)]
+    pub fn new(e: web_sys::Element) -> Modal;
+
+    #[wasm_bindgen(method)]
+    pub fn show(this: &Modal);
+
+    #[wasm_bindgen(method)]
+    pub fn hide(this: &Modal);
+}