retiretui 0.1.0

Retirement planning application for the terminal.
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

//! The documents a session opens: the switch from one to the next, and the
//! pickers that name them.

mod browse;
mod pickers;
#[cfg(test)]
mod tests;

use std::path::PathBuf;

use bevy_app::{App, PostStartup, Startup};
use bevy_ecs::prelude::{Commands, In, Res, ResMut, World};

use super::command::Outcome;
use super::compare::Compared;
use super::confirm::{Answer, Confirm};
use super::edit::{self, Draft};
use super::journal;
use super::nav::{ActivePage, Page};
use super::session::{Projected, Session, YearCursor};
use super::tools::{Claims, Ladders};
use super::watch::{self, Watch};

pub use browse::{Browsing, FilePick};
pub use pickers::{Pickers, compare_with, name_new_plan, open as open_picker, save_as};

pub fn plugin(app: &mut App) {
    app.add_plugins(browse::plugin);
    app.add_systems(Startup, pickers::register);
    app.add_systems(PostStartup, offer_a_document);
}

/// A shell launched on a directory offers the files it holds; one with
/// none of them is left on the new plan's form, which is the answer.
fn offer_a_document(session: Res<Session>, pickers: Res<Pickers>, mut browsing: ResMut<Browsing>) {
    if session.plan_path.is_none() && pickers::workspace_holds_a_plan(&session) {
        browsing.open(pickers.open);
    }
}

/// A document to open, and whether the compared set - and the Compare
/// page - stays with it: only when a compared plan opens in the
/// document's place.
#[derive(Clone)]
pub struct Opening {
    path: PathBuf,
    is_swap: bool,
}

impl Opening {
    /// The compared plan at `path` in the document's place, the document
    /// taking its place among the compared.
    pub fn swapping(path: PathBuf) -> Self {
        Self {
            path,
            is_swap: true,
        }
    }
}

impl From<PathBuf> for Opening {
    fn from(path: PathBuf) -> Self {
        Self {
            path,
            is_swap: false,
        }
    }
}

/// Opens the plan or scenario at `path` in place of the document the shell
/// holds. A draft the file does not hold is asked about first: Save,
/// Discard, or Cancel.
pub fn open(
    In(opening): In<Opening>,
    draft: Res<Draft>,
    session: Res<Session>,
    mut confirm: ResMut<Confirm>,
    mut commands: Commands,
) {
    if !draft.is_dirty() {
        commands.run_system_cached_with(switch, opening);
        return;
    }
    let discarding = opening.clone();
    confirm.ask_among(
        format!("Save the changes to {} first?", session.file_name()),
        vec![
            Answer::closing("Cancel"),
            Answer::running("Discard", move |commands| {
                commands.run_system_cached_with(switch, discarding);
            })
            .destructive(),
            Answer::running("Save", move |commands| {
                commands.run_system_cached_with(save_then_go, opening);
            })
            .primary(),
        ],
    );
}

fn save_then_go(In(wanted): In<Opening>, world: &mut World) {
    if let Ok(Outcome::Refused(reason)) = world.run_system_cached(edit::save) {
        journal::warn(reason);
        return;
    }
    switch(In(wanted), world);
}

/// A document that fails to load leaves the shell as it was.
pub fn switch(In(opening): In<Opening>, world: &mut World) {
    let tables = &world.resource::<Session>().tables;
    let (projected, files) = match watch::load_projected(&opening.path, tables) {
        Ok(loaded) => loaded,
        Err(invalid) => {
            journal::warn(format!("not opened: {}", invalid.headline()));
            return;
        }
    };
    let left = world
        .resource_mut::<Session>()
        .plan_path
        .replace(opening.path.clone());
    let held = opening
        .is_swap
        .then(|| world.remove_resource::<Compared>().unwrap_or_default());
    reset_session(world, projected, Watch::new(files));
    if let Some(held) = held {
        let swapped = held.swapped(&opening.path, left, &world.resource::<Session>().tables);
        world.insert_resource(swapped);
        world.insert_resource(ActivePage(Page::Compare));
    }
    journal::say(format!(
        "opened {}",
        world.resource::<Session>().file_name()
    ));
}

/// Everything a document takes with it when it goes: the draft it is
/// seeded into, what is watched for it, and what ran over it.
fn reset_session(world: &mut World, projected: Projected, watch: Watch) {
    world.insert_resource(projected);
    world.insert_resource(watch);
    edit::seed_draft(world);
    world.insert_resource(YearCursor::default());
    world.insert_resource(ActivePage::default());
    world.insert_resource(Compared::default());
    world.insert_resource(Ladders::default());
    world.insert_resource(Claims::default());
}