badterm 0.1.17

A cross-platform ANSI-BBS telnet client
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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256

//! File transfer overlays: the ZMODEM progress window and the upload prompt.

use std::path::PathBuf;

use badterm_core::screen::Screen;
use badterm_core::transfer::{Direction, Progress, XyProtocol};

use super::files::{FilePicker, PickerAction};
use crate::input::{Key, Mods};

use super::*;

const W: usize = 64;

/// Draw the progress window for an active transfer.
pub fn draw_progress(s: &mut Screen, p: &Progress) {
    let (x, y, h) = ((s.cols() - W) / 2, 8, 9);
    let title = match p.direction {
        Direction::Download => "ZMODEM Download",
        Direction::Upload => "ZMODEM Upload",
    };
    let t = theme::current();
    frame(s, x, y, W, h, title, t.window.fg(), t.window.bg());
    let inner = W - 6;
    let name = if p.file_name.is_empty() { "waiting for the other side..." } else { p.file_name.as_str() };
    text(s, x + 3, y + 2, inner, &format!("File: {name}"), t.window.fg(), t.window.bg());

    let fraction = match p.file_size {
        Some(size) if size > 0 => (p.file_bytes as f64 / size as f64).min(1.0),
        Some(_) => 1.0,
        None => 0.0,
    };
    let bar_w = inner - 6;
    let filled = (fraction * bar_w as f64).round() as usize;
    let mut bar = vec![0xB2; filled];
    bar.resize(bar_w, 0xB0);
    s.draw_text(x + 3, y + 3, &bar, t.field_value.fg(), t.field_value.bg());
    if p.file_size.is_some() {
        label(s, x + 3 + bar_w + 1, y + 3, &format!("{:>3}%", (fraction * 100.0) as u32), t.keys.fg(), t.keys.bg());
    }

    let rate = p.rate();
    let mut line = match p.file_size {
        Some(size) => format!("{} of {}", format_bytes(p.file_bytes), format_bytes(size)),
        None => format_bytes(p.file_bytes),
    };
    if rate > 0.0 {
        line.push_str(&format!("   {}/s", format_bytes(rate as u64)));
        if let Some(size) = p.file_size {
            let eta = (size.saturating_sub(p.file_bytes) as f64 / rate) as u64;
            line.push_str(&format!("   ETA {}:{:02}", eta / 60, eta % 60));
        }
    }
    text(s, x + 3, y + 4, inner, &line, t.window_text.fg(), t.window_text.bg());

    let mut files = format!("Files done: {}", p.files_done);
    if let Some(at) = p.resumed_at {
        files.push_str(&format!("   resumed at {}", format_bytes(at)));
    }
    if p.files_queued > 0 {
        files.push_str(&format!("   queued: {}", p.files_queued));
    }
    text(s, x + 3, y + 5, inner, &files, t.window_text.fg(), t.window_text.bg());
    let hint = "Esc cancels";
    label(s, x + (W - hint.len()) / 2, y + 7, hint, t.keys.fg(), t.keys.bg());
}

/// Upload protocols in the order offered: ZMODEM, then the others.
pub const UPLOAD_PROTOCOLS: [Option<XyProtocol>; 6] = [
    None,
    Some(XyProtocol::Ymodem),
    Some(XyProtocol::YmodemG),
    Some(XyProtocol::Xmodem1k),
    Some(XyProtocol::XmodemCrc),
    Some(XyProtocol::Xmodem),
];

pub fn protocol_name(p: Option<XyProtocol>) -> &'static str {
    p.map_or("ZMODEM", XyProtocol::name)
}

/// What the upload window decided.
pub enum UploadAction {
    None,
    Cancel,
    /// Send these, with this protocol (None: ZMODEM).
    Send(Option<XyProtocol>, Vec<PathBuf>),
}

/// The upload window: a file picker and the protocol. `requested` is set
/// when the BBS asked for a ZMODEM upload (it is waiting with ZRINIT), which
/// fixes the protocol.
pub struct UploadPrompt {
    pub picker: FilePicker,
    pub protocol: usize,
    pub requested: bool,
}

impl UploadPrompt {
    pub fn new(requested: bool, dir: PathBuf, protocol: usize) -> UploadPrompt {
        let protocol = if requested { 0 } else { protocol.min(UPLOAD_PROTOCOLS.len() - 1) };
        UploadPrompt { picker: FilePicker::new(dir, true, &[]), protocol, requested }
    }

    pub fn protocol(&self) -> Option<XyProtocol> {
        UPLOAD_PROTOCOLS[self.protocol]
    }

    pub fn handle_key(&mut self, key: Key, mods: Mods) -> UploadAction {
        match key {
            Key::Escape => return UploadAction::Cancel,
            Key::Left | Key::Right if !self.requested => {
                let n = UPLOAD_PROTOCOLS.len();
                self.protocol = if key == Key::Left { (self.protocol + n - 1) % n } else { (self.protocol + 1) % n };
            }
            _ => {
                if let PickerAction::Chosen(paths) = self.picker.handle_key(key, mods) {
                    return UploadAction::Send(self.protocol(), paths);
                }
            }
        }
        UploadAction::None
    }

    /// Draw the window; returns the text cursor, if a path is being typed.
    pub fn draw(&mut self, s: &mut Screen) -> Option<(usize, usize)> {
        let (w, h) = (74, 21);
        let (x, y) = ((s.cols() - w) / 2, (s.rows().saturating_sub(h)) / 2);
        let title = if self.requested { "The BBS is ready to receive" } else { "Upload" };
        let t = theme::current();
        frame(s, x, y, w, h, title, t.window.fg(), t.window.bg());
        let name_attr = if self.requested { t.field_name } else { t.keys };
        label(s, x + 2, y + 1, "Protocol:", name_attr.fg(), name_attr.bg());
        let v = format!("\u{25C4} {:<10} \u{25BA}", protocol_name(self.protocol()));
        label(s, x + 12, y + 1, &v, t.field_value.fg(), t.field_value.bg());
        let note = match self.protocol() {
            None if self.requested => "(the BBS started ZMODEM)",
            Some(p) if !p.batch() => "(one file; start the BBS's receive first)",
            Some(_) => "(start the BBS's receive first)",
            None => "(drop files on the window, too)",
        };
        label(s, x + 28, y + 1, note, t.note.fg(), t.note.bg());
        let cursor = self.picker.draw(s, x + 2, y + 3, w - 4, h - 6);
        let marked = self.picker.marked();
        let keys = if marked > 0 {
            format!("Enter send {marked} marked  Space mark  Bksp up  Tab path  Esc cancel")
        } else {
            "Enter send  Space mark  \u{2190}\u{2192} protocol  Bksp up  Tab path  Esc cancel".to_string()
        };
        label(s, x + 2, y + h - 2, &truncate(&keys, w - 4), t.keys.fg(), t.keys.bg());
        cursor
    }
}

/// Download protocols that need starting (ZMODEM starts by itself).
pub const DOWNLOAD_PROTOCOLS: [XyProtocol; 5] = XyProtocol::ALL;

pub enum DownloadAction {
    None,
    Cancel,
    /// Receive with this protocol; the name is for XMODEM.
    Receive(XyProtocol, Option<String>),
}

/// The window that starts an XMODEM or YMODEM download.
pub struct DownloadPrompt {
    pub protocol: usize,
    /// What an XMODEM file is saved as.
    pub name: TextField,
}

impl DownloadPrompt {
    pub fn new(protocol: usize) -> DownloadPrompt {
        DownloadPrompt { protocol: protocol.min(DOWNLOAD_PROTOCOLS.len() - 1), name: TextField::new("", 200) }
    }

    fn proto(&self) -> XyProtocol {
        DOWNLOAD_PROTOCOLS[self.protocol]
    }

    pub fn handle_key(&mut self, key: Key, mods: Mods) -> DownloadAction {
        let n = DOWNLOAD_PROTOCOLS.len();
        match key {
            Key::Escape => return DownloadAction::Cancel,
            Key::Up => self.protocol = (self.protocol + n - 1) % n,
            Key::Down | Key::Tab => self.protocol = (self.protocol + 1) % n,
            Key::Enter => {
                let name = self.name.value.trim().to_string();
                if !self.proto().batch() && name.is_empty() {
                    return DownloadAction::None;
                }
                let name = (!self.proto().batch()).then_some(name);
                return DownloadAction::Receive(self.proto(), name);
            }
            _ if !self.proto().batch() => {
                self.name.handle_key(key, mods);
            }
            _ => {}
        }
        DownloadAction::None
    }

    pub fn draw(&self, s: &mut Screen) -> Option<(usize, usize)> {
        let (w, h) = (60, 13);
        let (x, y) = ((s.cols() - w) / 2, (s.rows().saturating_sub(h)) / 2);
        let t = theme::current();
        frame(s, x, y, w, h, "Download", t.window.fg(), t.window.bg());
        label(s, x + 2, y + 1, "Start the BBS's send first, then choose:", t.window_text.fg(), t.window_text.bg());
        for (i, p) in DOWNLOAD_PROTOCOLS.iter().enumerate() {
            let a = if i == self.protocol { t.selected } else { t.field_value };
            let what = match p {
                XyProtocol::Ymodem => "names and sizes, several files",
                XyProtocol::YmodemG => "YMODEM without waiting: fastest",
                XyProtocol::Xmodem1k => "1K blocks, one file",
                XyProtocol::XmodemCrc => "128-byte blocks, one file",
                XyProtocol::Xmodem => "the original, one file",
            };
            text(s, x + 3, y + 3 + i, w - 6, &format!(" {:<11} {what}", p.name()), a.fg(), a.bg());
        }
        let mut cursor = None;
        if self.proto().batch() {
            label(s, x + 2, y + 9, "Files keep the names the BBS sends.", t.note.fg(), t.note.bg());
        } else {
            label(s, x + 2, y + 9, "Save as:", t.field_name.fg(), t.field_name.bg());
            cursor = Some(self.name.draw(s, x + 11, y + 9, w - 13, false, t.input.fg(), t.input.bg()));
        }
        label(s, x + 2, y + 11, "\u{2191}\u{2193} protocol   Enter start   Esc cancel", t.keys.fg(), t.keys.bg());
        cursor
    }
}

pub fn format_bytes(n: u64) -> String {
    const UNITS: [&str; 4] = ["KiB", "MiB", "GiB", "TiB"];
    if n < 1024 {
        return format!("{n} B");
    }
    let mut v = n as f64 / 1024.0;
    let mut unit = 0;
    while v >= 1024.0 && unit < UNITS.len() - 1 {
        v /= 1024.0;
        unit += 1;
    }
    format!("{v:.1} {}", UNITS[unit])
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn bytes() {
        assert_eq!(format_bytes(512), "512 B");
        assert_eq!(format_bytes(1536), "1.5 KiB");
        assert_eq!(format_bytes(5 * 1024 * 1024), "5.0 MiB");
    }
}