| 1 | /* -*-scala-*- |
| 2 | * |
| 3 | * Reporting progress for long-running jobs |
| 4 | * |
| 5 | * (c) 2018 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of the Trivial IP Encryption (TrIPE) Android app. |
| 11 | * |
| 12 | * TrIPE is free software: you can redistribute it and/or modify it under |
| 13 | * the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 3 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | package uk.org.distorted.tripe; package object progress; |
| 27 | |
| 28 | /*----- Imports -----------------------------------------------------------*/ |
| 29 | |
| 30 | import Math.ceil; |
| 31 | import System.currentTimeMillis; |
| 32 | import System.{err => stderr}; // FIXME: split out terminal progress |
| 33 | |
| 34 | /*----- Main code ---------------------------------------------------------*/ |
| 35 | |
| 36 | def formatTime(t: Int): String = |
| 37 | if (t < -1) "???" |
| 38 | else { |
| 39 | val (s, t1) = (t%60, t/60); |
| 40 | val (m, h) = (t1%60, t1/60); |
| 41 | if (h > 0) f"$h%d:$m%02d:$s%02d" |
| 42 | else f"$m%02d:$s%02d" |
| 43 | } |
| 44 | |
| 45 | private val UDATA = Seq("kB", "MB", "GB", "PB", "EB"); |
| 46 | def formatBytes(n: Long): String = { |
| 47 | val (x, u) = (n.toDouble, "B ") /: UDATA { |
| 48 | case ((x, u), name) if x >= 1024.0 => (x/1024.0, name) |
| 49 | case (xu, _) => xu |
| 50 | } |
| 51 | f"$x%6.1f$u%s" |
| 52 | } |
| 53 | |
| 54 | trait Eyecandy { |
| 55 | def set(line: String); |
| 56 | def clear(); |
| 57 | def commit(); |
| 58 | def commit(line: String) { commit(); set(line); commit(); } |
| 59 | |
| 60 | def begin(job: Job); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | trait Job with Publisher[ { |
| 65 | def what: String; // imperative for what we're doing |
| 66 | def cur: Long; // current position in work |
| 67 | def max: Long; // maximum work to do |
| 68 | def format: String; // describe progress in useful terms |
| 69 | |
| 70 | private[this] val t0 = currentTimeMillis; |
| 71 | |
| 72 | def eta: Int = |
| 73 | /* Report the estimated time remaining in seconds, or -1 if no idea. |
| 74 | * |
| 75 | * The model here is very stupid. Weird jobs should override this and do |
| 76 | * something more sensible. |
| 77 | */ |
| 78 | |
| 79 | if (max < 0 || cur <= 0) -1 |
| 80 | else ceil((currentTimeMillis - t0)/1000.0 * |
| 81 | (max - cur)/cur.toDouble).toInt; |
| 82 | } |
| 83 | |
| 84 | object TerminalEyecandy extends Eyecandy { |
| 85 | private var last = ""; |
| 86 | var eyecandyp = |
| 87 | |
| 88 | } |
| 89 | |
| 90 | /*----- That's all, folks -------------------------------------------------*/ |