radicle-tui/src/app.rs

pub mod event;
pub mod page;
pub mod subscription;

use anyhow::Result;

use radicle::cob::issue::IssueId;
use radicle::cob::patch::PatchId;
use radicle::identity::{Id, Project};
use radicle::profile::Profile;

use radicle_tui::ui::widget;
use tuirealm::application::PollStrategy;
use tuirealm::{Application, Frame, NoUserEvent, Sub, SubClause};

use radicle_tui::ui::context::Context;
use radicle_tui::ui::theme::{self, Theme};
use radicle_tui::Tui;
use radicle_tui::{cob, ui};

use page::{HomeView, PatchView};

use self::page::{IssuePage, PageStack};

#[derive(Debug, Eq, PartialEq, Clone, Hash)]
pub enum HomeCid {
    Header,
    Dashboard,
    IssueBrowser,
    PatchBrowser,
    Context,
    Shortcuts,
}

#[derive(Debug, Eq, PartialEq, Clone, Hash)]
pub enum PatchCid {
    Header,
    Activity,
    Files,
    Context,
    Shortcuts,
}

#[derive(Debug, Eq, PartialEq, Clone, Hash)]
pub enum IssueCid {
    Header,
    List,
    Details,
    Context,
    NewForm,
    Shortcuts,
}

/// All component ids known to this application.
#[derive(Debug, Eq, PartialEq, Clone, Hash)]
pub enum Cid {
    Home(HomeCid),
    Issue(IssueCid),
    Patch(PatchCid),
    GlobalListener,
    Popup,
}

/// Messages handled by this application.
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum HomeMessage {}

#[derive(Clone, Debug, Eq, PartialEq)]
pub enum IssueMessage {
    Show(IssueId),
    Changed(IssueId),
    Focus(IssueCid),
    OpenPopup(IssueCid),
    ClosePopup(IssueCid),
    Leave,
}

#[derive(Clone, Debug, Eq, PartialEq)]
pub enum PatchMessage {
    Show(PatchId),
    Leave,
}

#[derive(Clone, Debug, Eq, PartialEq)]
pub enum PopupMessage {
    Info(String),
    Warning(String),
    Error(String),
    Hide,
}

#[derive(Clone, Debug, Eq, PartialEq)]
pub enum Message {
    Home(HomeMessage),
    Issue(IssueMessage),
    Patch(PatchMessage),
    NavigationChanged(u16),
    Popup(PopupMessage),
    Tick,
    Quit,
    Batch(Vec<Message>),
}

#[allow(dead_code)]
pub struct App {
    context: Context,
    pages: PageStack,
    theme: Theme,
    quit: bool,
}

/// Creates a new application using a tui-realm-application, mounts all
/// components and sets focus to a default one.
impl App {
    pub fn new(profile: Profile, id: Id, project: Project) -> Self {
        Self {
            context: Context::new(profile, id, project),
            pages: PageStack::default(),
            theme: theme::default_dark(),
            quit: false,
        }
    }

    fn view_home(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        theme: &Theme,
    ) -> Result<()> {
        let home = Box::new(HomeView::new(theme.clone()));
        self.pages.push(home, app, &self.context, theme)?;

        Ok(())
    }

    fn view_patch(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        id: PatchId,
        theme: &Theme,
    ) -> Result<()> {
        let repo = self.context.repository();

        if let Some(patch) = cob::patch::find(repo, &id)? {
            let view = Box::new(PatchView::new(theme.clone(), (id, patch)));
            self.pages.push(view, app, &self.context, theme)?;

            Ok(())
        } else {
            Err(anyhow::anyhow!(
                "Could not mount 'page::PatchView'. Patch not found."
            ))
        }
    }

    fn view_issue(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        id: IssueId,
        theme: &Theme,
    ) -> Result<()> {
        let repo = self.context.repository();

        if let Some(issue) = cob::issue::find(repo, &id)? {
            let view = Box::new(IssuePage::new(&self.context, theme, (id, issue)));
            self.pages.push(view, app, &self.context, theme)?;

            Ok(())
        } else {
            Err(anyhow::anyhow!(
                "Could not mount 'page::IssueView'. Issue not found."
            ))
        }
    }

    fn process(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        message: Message,
    ) -> Result<Option<Message>> {
        let theme = theme::default_dark();
        match message {
            Message::Batch(messages) => {
                let mut results = vec![];
                for message in messages {
                    if let Some(result) = self.process(app, message)? {
                        results.push(result);
                    }
                }
                match results.len() {
                    0 => Ok(None),
                    1 => Ok(Some(results[0].to_owned())),
                    _ => Ok(Some(Message::Batch(results))),
                }
            }
            Message::Issue(IssueMessage::Show(id)) => {
                self.view_issue(app, id, &theme)?;
                Ok(None)
            }
            Message::Issue(IssueMessage::Leave) => {
                self.pages.pop(app)?;
                Ok(None)
            }
            Message::Patch(PatchMessage::Show(id)) => {
                self.view_patch(app, id, &theme)?;
                Ok(None)
            }
            Message::Patch(PatchMessage::Leave) => {
                self.pages.pop(app)?;
                Ok(None)
            }
            Message::Popup(PopupMessage::Info(info)) => {
                self.show_info_popup(app, &theme, &info)?;
                Ok(None)
            }
            Message::Popup(PopupMessage::Warning(warning)) => {
                self.show_warning_popup(app, &theme, &warning)?;
                Ok(None)
            }
            Message::Popup(PopupMessage::Error(error)) => {
                self.show_error_popup(app, &theme, &error)?;
                Ok(None)
            }
            Message::Popup(PopupMessage::Hide) => {
                self.hide_popup(app)?;
                Ok(None)
            }
            Message::Quit => {
                self.quit = true;
                Ok(None)
            }
            _ => self
                .pages
                .peek_mut()?
                .update(app, &self.context, &theme, message),
        }
    }

    fn show_info_popup(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        theme: &Theme,
        message: &str,
    ) -> Result<()> {
        let popup = widget::common::info(theme, message);
        app.remount(Cid::Popup, popup.to_boxed(), vec![])?;
        app.active(&Cid::Popup)?;

        Ok(())
    }

    fn show_warning_popup(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        theme: &Theme,
        message: &str,
    ) -> Result<()> {
        let popup = widget::common::warning(theme, message);
        app.remount(Cid::Popup, popup.to_boxed(), vec![])?;
        app.active(&Cid::Popup)?;

        Ok(())
    }

    fn show_error_popup(
        &mut self,
        app: &mut Application<Cid, Message, NoUserEvent>,
        theme: &Theme,
        message: &str,
    ) -> Result<()> {
        let popup = widget::common::error(theme, message);
        app.remount(Cid::Popup, popup.to_boxed(), vec![])?;
        app.active(&Cid::Popup)?;

        Ok(())
    }

    fn hide_popup(&mut self, app: &mut Application<Cid, Message, NoUserEvent>) -> Result<()> {
        app.blur()?;
        app.umount(&Cid::Popup)?;

        Ok(())
    }
}

impl Tui<Cid, Message> for App {
    fn init(&mut self, app: &mut Application<Cid, Message, NoUserEvent>) -> Result<()> {
        self.view_home(app, &self.theme.clone())?;

        // Add global key listener and subscribe to key events
        let global = ui::widget::common::global_listener().to_boxed();
        app.mount(
            Cid::GlobalListener,
            global,
            vec![Sub::new(subscription::global_clause(), SubClause::Always)],
        )?;

        Ok(())
    }

    fn view(&mut self, app: &mut Application<Cid, Message, NoUserEvent>, frame: &mut Frame) {
        if let Ok(page) = self.pages.peek_mut() {
            page.view(app, frame);
        }

        if app.mounted(&Cid::Popup) {
            app.view(&Cid::Popup, frame, frame.size());
        }
    }

    fn update(&mut self, app: &mut Application<Cid, Message, NoUserEvent>) -> Result<bool> {
        match app.tick(PollStrategy::Once) {
            Ok(messages) if !messages.is_empty() => {
                for message in messages {
                    let mut msg = Some(message);
                    while msg.is_some() {
                        msg = self.process(app, msg.unwrap())?;
                    }
                }
                Ok(true)
            }
            _ => Ok(false),
        }
    }

    fn quit(&self) -> bool {
        self.quit
    }
}