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annotate src/core/time.cc @ 315:34347fd2a2de

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session: allow printing status messages ...!
author Paper <paper@paper.us.eu.org>
date Tue, 11 Jun 2024 14:16:40 -0400
parents da2c5a8ff306
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5c0397762b53 INCOMPLETE: megacommit :)
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1 #include "core/time.h"
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2 #include "core/strings.h"
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4 #include <cassert>
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5 #include <cmath>
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6 #include <cstdint>
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7 #include <ctime>
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8 #include <string>
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10 #include <QDateTime>
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12 namespace Time {
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13
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14 static Timestamp GetSecondsInMinutes(Timestamp length) {
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15 return std::llround(static_cast<double>(length) / 60.0);
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16 }
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18 static Timestamp GetSecondsInHours(Timestamp length) {
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19 return std::llround(static_cast<double>(length) / 3600.0);
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20 }
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22 static Timestamp GetSecondsInDays(Timestamp length) {
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23 return std::llround(static_cast<double>(length) / 86400.0);
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24 }
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26 std::string GetSecondsAsRelativeString(Timestamp length) {
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27 std::string result;
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29 auto get = [](Timestamp val, const std::string& s, const std::string& p) {
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30 return Strings::ToUtf8String(val) + " " + (val == 1 ? s : p);
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31 };
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33 if (length < 60)
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34 result = get(length, "second", "seconds");
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35 else if (GetSecondsInMinutes(length) < 60)
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36 result = get(GetSecondsInMinutes(length), "minute", "minutes");
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37 else if (GetSecondsInHours(length) < 24)
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38 result = get(GetSecondsInHours(length), "hour", "hours");
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39 else if (GetSecondsInDays(length) < 28)
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40 result = get(GetSecondsInDays(length), "day", "days");
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41 else if (GetSecondsInDays(length) < 365)
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42 result = get(GetSecondsInDays(length) / 30, "month", "months");
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43 else
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44 result = get(GetSecondsInDays(length) / 365, "year", "years");
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46 if (length < 0)
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47 result = "In " + result;
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48 else
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49 result += " ago";
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50
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51 return result;
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52 }
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54 /* "amount" does not have to be in seconds, and can be any unit if the correct ratio to seconds
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55 * is passed to "unit_in_seconds" (for example, if the input is minutes, pass 60.0) */
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56 std::string GetSecondsAsAbsoluteString(Units unit_cutoff, Timestamp amount, double unit_in_seconds) {
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57 /* avoid calculating this twice */
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58 const double years_conv = (31556952.0 / unit_in_seconds);
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59 const double months_conv = (2629746.0 / unit_in_seconds);
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60 const double days_conv = (86400.0 / unit_in_seconds);
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61 const double hours_conv = (3600.0 / unit_in_seconds);
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62 const double minutes_conv = (60.0 / unit_in_seconds);
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63 const double seconds_conv = (1.0 / unit_in_seconds);
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65 const int years = amount / years_conv;
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66 const int months = std::fmod(amount, years_conv) / months_conv;
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67 const int days = std::fmod(amount, months_conv) / days_conv;
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68 const int hours = std::fmod(amount, days_conv) / hours_conv;
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69 const int minutes = std::fmod(amount, hours_conv) / minutes_conv;
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70 const int seconds = std::fmod(amount, minutes_conv) / seconds_conv;
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72 const auto add_time_segment = [](std::ostringstream& str, int64_t amount, const std::string_view& singular,
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73 const std::string_view& plural, bool always = false) {
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74 if (amount > 0 || always)
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75 str << amount << ((amount == 1) ? singular : plural);
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76 };
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78 /* for now, this function is very en_US specific */
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80 std::ostringstream string;
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81 add_time_segment(string, years, " year ", " years ");
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82 add_time_segment(string, months, " month ", " months ");
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83 add_time_segment(string, days, " day ", " days ");
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84 add_time_segment(string, hours, " hour ", " hours ");
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85
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86 if (unit_cutoff == Units::Minutes) {
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87 add_time_segment(string, minutes, " minute", " minutes", true);
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88 return string.str();
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89 } else {
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90 add_time_segment(string, minutes, " minute ", " minutes ");
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91 }
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93 add_time_segment(string, seconds, " second", " seconds", true);
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94 return string.str();
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95 }
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96
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97 Timestamp GetSystemTime() {
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98 return QDateTime::currentDateTime().toUTC().toSecsSinceEpoch();
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99 }
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101 } // namespace Time