1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
use adw::{prelude::*, subclass::prelude::*};
use futures_channel::oneshot;
use gtk::{glib, glib::clone, CompositeTemplate};
use tracing::error;

mod dm_user;
mod dm_user_list;

use self::{
    dm_user::DmUser,
    dm_user_list::{DmUserList, DmUserListState},
};
use crate::{
    components::{PillSource, PillSourceRow},
    gettext,
    session::model::{Session, User},
    Window,
};

mod imp {
    use std::cell::RefCell;

    use glib::subclass::InitializingObject;

    use super::*;

    #[derive(Debug, Default, CompositeTemplate, glib::Properties)]
    #[template(resource = "/org/gnome/Fractal/ui/session/view/create_dm_dialog/mod.ui")]
    #[properties(wrapper_type = super::CreateDmDialog)]
    pub struct CreateDmDialog {
        /// The current session.
        #[property(get, set = Self::set_session, explicit_notify)]
        pub session: glib::WeakRef<Session>,
        #[template_child]
        pub list_box: TemplateChild<gtk::ListBox>,
        #[template_child]
        pub search_entry: TemplateChild<gtk::SearchEntry>,
        #[template_child]
        pub stack: TemplateChild<gtk::Stack>,
        #[template_child]
        pub error_page: TemplateChild<adw::StatusPage>,
        pub sender: RefCell<Option<oneshot::Sender<Option<User>>>>,
    }

    #[glib::object_subclass]
    impl ObjectSubclass for CreateDmDialog {
        const NAME: &'static str = "CreateDmDialog";
        type Type = super::CreateDmDialog;
        type ParentType = adw::Dialog;

        fn class_init(klass: &mut Self::Class) {
            PillSourceRow::ensure_type();

            Self::bind_template(klass);
            Self::Type::bind_template_callbacks(klass);
        }

        fn instance_init(obj: &InitializingObject<Self>) {
            obj.init_template();
        }
    }

    #[glib::derived_properties]
    impl ObjectImpl for CreateDmDialog {}

    impl WidgetImpl for CreateDmDialog {}

    impl AdwDialogImpl for CreateDmDialog {
        fn closed(&self) {
            if let Some(sender) = self.sender.take() {
                if sender.send(None).is_err() {
                    error!("Could not send selected session");
                }
            }
        }
    }

    impl CreateDmDialog {
        /// Set the current session.
        pub(super) fn set_session(&self, session: Option<Session>) {
            if self.session.upgrade() == session {
                return;
            }
            let obj = self.obj();

            if let Some(session) = &session {
                let user_list = DmUserList::new(session);

                // We don't need to disconnect this signal since the `DmUserList` will be
                // disposed once unbound from the `gtk::ListBox`
                user_list.connect_state_notify(clone!(@weak obj => move |model| {
                    obj.update_view(model);
                }));

                self.search_entry
                    .bind_property("text", &user_list, "search-term")
                    .sync_create()
                    .build();

                self.list_box.bind_model(Some(&user_list), |user| {
                    let source = user
                        .downcast_ref::<PillSource>()
                        .expect("DmUserList must contain only `DmUser`");
                    let row = PillSourceRow::new();
                    row.set_source(Some(source.clone()));

                    row.upcast()
                });

                obj.update_view(&user_list);
            } else {
                self.list_box.unbind_model();
            }

            self.session.set(session.as_ref());
            obj.notify_session();
        }
    }
}

glib::wrapper! {
    /// Dialog to create a new direct chat.
    pub struct CreateDmDialog(ObjectSubclass<imp::CreateDmDialog>)
        @extends gtk::Widget, adw::Dialog, @implements gtk::Accessible;
}

#[gtk::template_callbacks]
impl CreateDmDialog {
    pub fn new(session: &Session) -> Self {
        glib::Object::builder().property("session", session).build()
    }

    fn update_view(&self, model: &DmUserList) {
        let visible_child_name = match model.state() {
            DmUserListState::Initial => "no-search-page",
            DmUserListState::Loading => "loading-page",
            DmUserListState::NoMatching => "no-matching-page",
            DmUserListState::Matching => "matching-page",
            DmUserListState::Error => {
                self.show_error(&gettext("An error occurred while searching for users"));
                return;
            }
        };

        self.imp().stack.set_visible_child_name(visible_child_name);
    }

    fn show_error(&self, message: &str) {
        self.imp().error_page.set_description(Some(message));
        self.imp().stack.set_visible_child_name("error-page");
    }

    #[template_callback]
    fn row_activated_cb(&self, row: gtk::ListBoxRow) {
        let Some(user) = row
            .downcast_ref::<PillSourceRow>()
            .and_then(|r| r.source())
            .and_downcast::<User>()
        else {
            return;
        };

        // TODO: For now we show the loading page while we create the room,
        // ideally we would like to have the same behavior as Element:
        // Create the room only once the user sends a message
        let imp = self.imp();
        imp.stack.set_visible_child_name("loading-page");
        imp.search_entry.set_sensitive(false);

        if let Some(sender) = imp.sender.take() {
            if sender.send(Some(user)).is_err() {
                error!("Could not send selected session");
            }
        }
    }

    /// Select a user to start a direct chat with.
    pub async fn start_direct_chat(&self, parent: &impl IsA<gtk::Widget>) {
        let (sender, receiver) = oneshot::channel();
        self.imp().sender.replace(Some(sender));

        self.present(parent);

        let Ok(Some(user)) = receiver.await else {
            return;
        };

        match user.get_or_create_direct_chat().await {
            Ok(room) => {
                let Some(window) = parent.root().and_downcast::<Window>() else {
                    return;
                };

                window.session_view().select_room(Some(room));
                self.close();
            }
            Err(_) => {
                self.show_error(&gettext("Could not create a new Direct Chat"));
                self.imp().search_entry.set_sensitive(true);
            }
        }
    }
}