tz 1.1.3

an Abbot package for Slack by Serious Business

Convert time to the timezones for mentioned users.

Abbot is a programmable bot that turns your team chat into a shared command center. We handle all the boilerplate of building and running these conmmands so that you can focus on making tools that help you ship faster.

We built Abbot because we saw the power of this style of work (called ChatOps), when we worked at GitHub. ChatOps made it possible for GitHub to work productively without meetings, while globally distributed. We think it's a pretty great way to work, so we made it easy to use in Slack, Discord, and Microsoft Teams.

You can read more about Abbot here, check out our blog, or take a look at some of the other cool packages available as a one-click install from Abbot's Package Directory.

The tz skill is a convenient way to coordinate users in multiple timezones. For example, say you want to know the current time for you and your colleagues @paulnakata and @costello.

@abbot tz me @paulnakata @costello will show a table of the current time in each mentioned user's timezone.

 User       | Time       | TimeZone           
 ---------- | ---------- | ------------------- 
 haacked    | 1:11:24 PM | America/Los_Angeles
 paulnakata | 4:11:24 PM | America/New_York
 costello   | 7:11:24 PM | Europe/Madrid

Fantastic, but suppose you want to schedule a meeting at 2pm.

@abbot tz 2pm me @paulnakata @costello This shows a table showing how 2pm for the first mentioned user maps to each mentioned user.

 User       | Time       | TimeZone           
 ---------- | ---------- | ------------------- 
 haacked    | 2:00:00 PM | America/Los_Angeles
 paulnakata | 4:00:00 PM | America/New_York
 costello   | 7:00:00 PM | Europe/Madrid

Later on, you want to be fair and schedule a meeting at 2:30pm for @costello.

@abbot tz 2:30pm @costello @paulnakata me

 User       | Time       | TimeZone           
 ---------- | ---------- | ------------------- 
 costello   | 7:30:00 PM | Europe/Madrid
 paulnakata | 4:30:00 PM | America/New_York
 haacked    | 2:30:00 PM | America/Los_Angeles

Note that this only works for Slack at the time being because Discord does not provide timezone information for users.

@abbot tz replies with the current time in Abbot's timezone @abbot tz me replies with the current time in your timezone. @abbot tz {time} @user1 @user2 replies with the in each of the user's timezones. It uses the first mention's timezone as the basis for the time. For example: @abbot tz 2pm me @somebody @another will show 2pm in my timezone converted to the timezones of @somebody and @another. @abbot tz 2pm @somebody me will show 2pm in @somebody's timezone converted to my timezone.

/*
Description: Convert time to the timezones for mentioned users.

Package URL: https://ab.bot/packages/aseriousbiz/tz

Usage:

`@abbot tz` _replies with the current time in Abbot's timezone_
`@abbot tz me` _replies with the current time in your timezone._
`@abbot tz {time} @user1 @user2` _replies with the {time} in each of the user's timezones. It uses the first mention's timezone as the basis for the time._
For example: `@abbot tz 2pm me @somebody @another` will show 2pm in my timezone converted to the timezones of @somebody and @another.
`@abbot tz 2pm @somebody me` will show 2pm in @somebody's timezone converted to my timezone.
*/
if (Bot.Arguments is { Count: 0 }) {
    await Bot.ReplyAsync($"Hello, it is `{GetLocalTime(Bot.TimeZone)}` in my timezone. Try `{Bot} help tz` to learn more about what I can do with timezones.");
    return;
}

if (Bot.From.TimeZone is null) {
    await Bot.ReplyAsync($"I do not know your timezone. You can tell me using `{Bot} my tz is {{tz}}` (where tz is the TZ database name in https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) or by telling me your location, `@abbot my location is {{zip, city, or address}}`");
    return;
}

var time = Bot.Arguments.First();

// If no target time is specified, use the current time for the user or Abbot
// If we do not know the user's timezone.
var targetTime = time.ToLocalTime() is LocalTime localTime
    ? localTime
    : Bot.From.GetLocalTime();

var mentions = GetOrderedNormalizedMentions();

if (mentions is { Count: 0 }) {
    await Bot.ReplyAsync($"Mention some users to see this time in their timezones.");
    return;
}

var timeTable = GetTimeData(mentions, targetTime.Value);
await Bot.ReplyTableAsync(timeTable);
return;

IEnumerable<UserTimeZone> GetTimeData(IList<IChatUser> mentions, LocalTime localTime) {
    // Use the timezone for the first mention.
    var sourceTz = mentions.First().TimeZone;

    foreach (var mention in mentions) {
        var mentionTz = mention.TimeZone;
        if (mentionTz is null) {
            yield return new UserTimeZone(mention.Name);
        }
        else {
            var time = localTime.ToTimeZone(sourceTz, mentionTz).TimeOfDay;
            yield return new UserTimeZone(mention.Name, mentionTz.Id, time.ToString());
        }
    }
}

public class UserTimeZone {
    public UserTimeZone(string user) : this (user, "(unknown)", "(unknown)") {
    }
    
    public UserTimeZone(string user, string timezone, string time) {
        User = user;
        TimeZone = timezone;
        Time = time;
    }
    
    public string User { get; }
    public string Time { get; }
    public string TimeZone { get; }
}

static string GetLocalTime(DateTimeZone tz) {
    if (tz is null) {
        return null;
    }
    var now = SystemClock.Instance.GetCurrentInstant();
    return $"{now.InZone(tz):MMM dd, uuuu h:mm:ss tt o<G>} {tz}";
}

IList<IChatUser> GetOrderedNormalizedMentions() {
    return Bot.Arguments.Select(arg => arg is IMentionArgument mention
                                ? mention.Mentioned
                                : arg.Value is "me"
                                   ? Bot.From
                                   : null)
        .Where(user => user is not null)
        .ToList();
}

static Instant GetCurrentInstant(){
    return SystemClock.Instance.GetCurrentInstant();
}

Version	Created	Author	Release Notes	Installs
1.1.3	9/14/2021	haacked	Fail if the user doesn't have their own timezone set.	6
1.1.2	9/14/2021	haacked	Some bug fixes	0
1.1.1	1/30/2021	haacked	Added support for Discord.	15
1.0.1	1/27/2021	haacked	Block the skill for Discord with a helpful message.	0
1.0.0	1/27/2021	haacked	Initial version. No support yet for specifying timezones in the case of chat platforms that do not support it.	1

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Details

Last updated: Tuesday, 14 September 2021 17:14
Installs: 22 total installs
Language: CSharp
License: MIT License

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