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Add swift scheduling exercise #749

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a998879
Fixes to concept tree
meatball133 Dec 6, 2024
ca5f72c
Merge branch 'exercism:main' into main
meatball133 Jan 1, 2026
31aa5b6
Merge branch 'exercism:main' into main
meatball133 Jan 3, 2026
cd3dfe2
Add Swift Scheduling exercise with instructions, examples, and tests
meatball133 Jan 3, 2026
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8 changes: 8 additions & 0 deletions config.json
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Expand Up @@ -1082,6 +1082,14 @@
"prerequisites": [],
"difficulty": 4
},
{
"slug": "swift-scheduling",
"name": "Swift Scheduling",
"uuid": "7f8b5494-1424-488a-a650-e5ceca8ed6f2",
"practices": [],
"prerequisites": [],
"difficulty": 4
},
{
"slug": "grade-school",
"name": "Grade School",
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50 changes: 50 additions & 0 deletions exercises/practice/swift-scheduling/.docs/instructions.md
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# Instructions

Your task is to convert delivery date descriptions to _actual_ delivery dates, based on when the meeting started.

There are two types of delivery date descriptions:

1. Fixed: a predefined set of words.
2. Variable: words that have a variable component, but follow a predefined set of patterns.

## Fixed delivery date descriptions

There are three fixed delivery date descriptions:

- `"NOW"`
- `"ASAP"` (As Soon As Possible)
- `"EOW"` (End Of Week)

The following table shows how to translate them:

| Description | Meeting start | Delivery date |
| ----------- | ----------------------------- | ----------------------------------- |
| `"NOW"` | - | Two hours after the meeting started |
| `"ASAP"` | Before 13:00 | Today at 17:00 |
| `"ASAP"` | After or at 13:00 | Tomorrow at 13:00 |
| `"EOW"` | Monday, Tuesday, or Wednesday | Friday at 17:00 |
| `"EOW"` | Thursday or Friday | Sunday at 20:00 |

## Variable delivery date descriptions

There are two variable delivery date description patterns:

- `"<N>M"` (N-th month)
- `"Q<N>"` (N-th quarter)

| Description | Meeting start | Delivery date |
| ----------- | ------------------------- | --------------------------------------------------------- |
| `"<N>M"` | Before N-th month | At 8:00 on the _first_ workday of this year's N-th month |
| `"<N>M"` | After or in N-th month | At 8:00 on the _first_ workday of next year's N-th month |
| `"Q<N>"` | Before or in N-th quarter | At 8:00 on the _last_ workday of this year's N-th quarter |
| `"Q<N>"` | After N-th quarter | At 8:00 on the _last_ workday of next year's N-th quarter |

~~~~exercism/note
A workday is a Monday, Tuesday, Wednesday, Thursday, or Friday.

A year has four quarters, each with three months:
1. January/February/March
2. April/May/June
3. July/August/September
4. October/November/December.
~~~~
6 changes: 6 additions & 0 deletions exercises/practice/swift-scheduling/.docs/introduction.md
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# Introduction

This week, it is your turn to take notes in the department's planning meeting.
In this meeting, your boss will set delivery dates for all open work items.
Annoyingly, instead of specifying the _actual_ delivery dates, your boss will only _describe them_ in an abbreviated format.
As many of your colleagues won't be familiar with this corporate lingo, you'll need to convert these delivery date descriptions to actual delivery dates.
19 changes: 19 additions & 0 deletions exercises/practice/swift-scheduling/.meta/config.json
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{
"authors": [
"meatball133"
],
"files": {
"solution": [
"src/swift_scheduling.cr"
],
"test": [
"spec/swift_scheduling_spec.cr"
],
"example": [
".meta/src/example.cr"
]
},
"blurb": "Convert delivery date descriptions to actual delivery dates.",
"source": "Erik Schierboom",
"source_url": "https://github.com/exercism/problem-specifications/pull/2536"
}
70 changes: 70 additions & 0 deletions exercises/practice/swift-scheduling/.meta/src/example.cr
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module SwiftScheduling
private def self.first_workday_of_month(year : Int32, month : Int32) : Time
first = Time.utc(year, month, 1, 8, 0, 0)

case first.day_of_week
when Time::DayOfWeek::Saturday
first + 2.days
when Time::DayOfWeek::Sunday
first + 1.day
else
first
end
end

private def self.last_workday_of_month(year : Int32, month : Int32) : Time
next_month = month == 12 ? 1 : month + 1
next_year = month == 12 ? year + 1 : year

last = Time.utc(next_year, next_month, 1, 8, 0, 0) - 1.day

case last.day_of_week
when Time::DayOfWeek::Saturday
last - 1.day
when Time::DayOfWeek::Sunday
last - 2.days
else
last
end
end

def self.delivery_date(meeting_start : Time, description : String) : Time
result = meeting_start
case description
when "NOW"
result = meeting_start + 2.hours
when "ASAP"
if meeting_start.hour < 13
result = Time.utc(meeting_start.year, meeting_start.month, meeting_start.day, 17, 0, 0)
else
tomorrow = meeting_start + 1.day
result = Time.utc(tomorrow.year, tomorrow.month, tomorrow.day, 13, 0, 0)
end
when "EOW"
case meeting_start.day_of_week.to_i
when 1..3 # Monday to Wednesday
friday = meeting_start + (5 - meeting_start.day_of_week.to_i).days
result = Time.utc(friday.year, friday.month, friday.day, 17, 0, 0)
when 4, 5 # Thursday or Friday
sunday = meeting_start + (7 - meeting_start.day_of_week.to_i).days
result = Time.utc(sunday.year, sunday.month, sunday.day, 20, 0, 0)
end
else
# | `"<N>M"` | Before N-th month | At 8:00 on the _first_ workday of this year's N-th month |
# | `"<N>M"` | After or in N-th month | At 8:00 on the _first_ workday of next year's N-th month |
# | `"Q<N>"` | Before or in N-th quarter | At 8:00 on the _last_ workday of this year's N-th quarter |
# | `"Q<N>"` | After N-th quarter | At 8:00 on the _last_ workday of next year's N-th quarter |
if description.includes?("M")
month = description[0..-2].to_i
year = meeting_start.month < month ? meeting_start.year : meeting_start.year + 1
result = first_workday_of_month(year, month)
elsif description.includes?("Q")
quarter = description[1..-1].to_i
start_quarter = ((meeting_start.month - 1) // 3) + 1
year = start_quarter <= quarter ? meeting_start.year : meeting_start.year + 1
result = last_workday_of_month(year, quarter * 3)
end
end
result
end
end
12 changes: 12 additions & 0 deletions exercises/practice/swift-scheduling/.meta/test_template.ecr
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require "spec"
require "../src/*"

describe "<%-= to_capitalized(@json["exercise"].to_s) %>" do
<%- @json["cases"].as_a.each do |cases| %>
<%= status()%> "<%-= cases["description"] %>" do
start = Time.parse_utc("<%= cases["input"]["meetingStart"] %>", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("<%-= cases["expected"] %>", "%Y-%m-%dT%H:%M:%S")
<%-= to_capitalized(@json["exercise"].to_s) %>.<%= cases["property"].to_s.underscore %>(start, <%= cases["input"]["description"].to_s.inspect %>).should eq(expected)
end
<% end %>
end
58 changes: 58 additions & 0 deletions exercises/practice/swift-scheduling/.meta/tests.toml
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# This is an auto-generated file.
#
# Regenerating this file via `configlet sync` will:
# - Recreate every `description` key/value pair
# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
# - Preserve any other key/value pair
#
# As user-added comments (using the # character) will be removed when this file
# is regenerated, comments can be added via a `comment` key.

[1d0e6e72-f370-408c-bc64-5dafa9c6da73]
description = "NOW translates to two hours later"

[93325e7b-677d-4d96-b017-2582af879dc2]
description = "ASAP before one in the afternoon translates to today at five in the afternoon"

[cb4252a3-c4c1-41f6-8b8c-e7269733cef8]
description = "ASAP at one in the afternoon translates to tomorrow at one in the afternoon"

[6fddc1ea-2fe9-4c60-81f7-9220d2f45537]
description = "ASAP after one in the afternoon translates to tomorrow at one in the afternoon"

[25f46bf9-6d2a-4e95-8edd-f62dd6bc8a6e]
description = "EOW on Monday translates to Friday at five in the afternoon"

[0b375df5-d198-489e-acee-fd538a768616]
description = "EOW on Tuesday translates to Friday at five in the afternoon"

[4afbb881-0b5c-46be-94e1-992cdc2a8ca4]
description = "EOW on Wednesday translates to Friday at five in the afternoon"

[e1341c2b-5e1b-4702-a95c-a01e8e96e510]
description = "EOW on Thursday translates to Sunday at eight in the evening"

[bbffccf7-97f7-4244-888d-bdd64348fa2e]
description = "EOW on Friday translates to Sunday at eight in the evening"

[d651fcf4-290e-407c-8107-36b9076f39b2]
description = "EOW translates to leap day"

[439bf09f-3a0e-44e7-bad5-b7b6d0c4505a]
description = "2M before the second month of this year translates to the first workday of the second month of this year"

[86d82e83-c481-4fb4-9264-625de7521340]
description = "11M in the eleventh month translates to the first workday of the eleventh month of next year"

[0d0b8f6a-1915-46f5-a630-1ff06af9da08]
description = "4M in the ninth month translates to the first workday of the fourth month of next year"

[06d401e3-8461-438f-afae-8d26aa0289e0]
description = "Q1 in the first quarter translates to the last workday of the first quarter of this year"

[eebd5f32-b16d-4ecd-91a0-584b0364b7ed]
description = "Q4 in the second quarter translates to the last workday of the fourth quarter of this year"

[c920886c-44ad-4d34-a156-dc4176186581]
description = "Q3 in the fourth quarter translates to the last workday of the third quarter of next year"
100 changes: 100 additions & 0 deletions exercises/practice/swift-scheduling/spec/swift_scheduling_spec.cr
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require "spec"
require "../src/*"

describe "SwiftScheduling" do
it "NOW translates to two hours later" do
start = Time.parse_utc("2012-02-13T09:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2012-02-13T11:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "NOW").should eq(expected)
end

pending "ASAP before one in the afternoon translates to today at five in the afternoon" do
start = Time.parse_utc("1999-06-03T09:45:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("1999-06-03T17:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "ASAP").should eq(expected)
end

pending "ASAP at one in the afternoon translates to tomorrow at one in the afternoon" do
start = Time.parse_utc("2008-12-21T13:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2008-12-22T13:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "ASAP").should eq(expected)
end

pending "ASAP after one in the afternoon translates to tomorrow at one in the afternoon" do
start = Time.parse_utc("2008-12-21T14:50:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2008-12-22T13:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "ASAP").should eq(expected)
end

pending "EOW on Monday translates to Friday at five in the afternoon" do
start = Time.parse_utc("2025-02-03T16:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2025-02-07T17:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "EOW").should eq(expected)
end

pending "EOW on Tuesday translates to Friday at five in the afternoon" do
start = Time.parse_utc("1997-04-29T10:50:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("1997-05-02T17:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "EOW").should eq(expected)
end

pending "EOW on Wednesday translates to Friday at five in the afternoon" do
start = Time.parse_utc("2005-09-14T11:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2005-09-16T17:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "EOW").should eq(expected)
end

pending "EOW on Thursday translates to Sunday at eight in the evening" do
start = Time.parse_utc("2011-05-19T08:30:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2011-05-22T20:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "EOW").should eq(expected)
end

pending "EOW on Friday translates to Sunday at eight in the evening" do
start = Time.parse_utc("2022-08-05T14:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2022-08-07T20:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "EOW").should eq(expected)
end

pending "EOW translates to leap day" do
start = Time.parse_utc("2008-02-25T10:30:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2008-02-29T17:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "EOW").should eq(expected)
end

pending "2M before the second month of this year translates to the first workday of the second month of this year" do
start = Time.parse_utc("2007-01-02T14:15:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2007-02-01T08:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "2M").should eq(expected)
end

pending "11M in the eleventh month translates to the first workday of the eleventh month of next year" do
start = Time.parse_utc("2013-11-21T15:30:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2014-11-03T08:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "11M").should eq(expected)
end

pending "4M in the ninth month translates to the first workday of the fourth month of next year" do
start = Time.parse_utc("2019-11-18T15:15:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2020-04-01T08:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "4M").should eq(expected)
end

pending "Q1 in the first quarter translates to the last workday of the first quarter of this year" do
start = Time.parse_utc("2003-01-01T10:45:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2003-03-31T08:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "Q1").should eq(expected)
end

pending "Q4 in the second quarter translates to the last workday of the fourth quarter of this year" do
start = Time.parse_utc("2001-04-09T09:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2001-12-31T08:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "Q4").should eq(expected)
end

pending "Q3 in the fourth quarter translates to the last workday of the third quarter of next year" do
start = Time.parse_utc("2022-10-06T11:00:00", "%Y-%m-%dT%H:%M:%S")
expected = Time.parse_utc("2023-09-29T08:00:00", "%Y-%m-%dT%H:%M:%S")
SwiftScheduling.delivery_date(start, "Q3").should eq(expected)
end
end
5 changes: 5 additions & 0 deletions exercises/practice/swift-scheduling/src/swift_scheduling.cr
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module SwiftScheduling
def self.delivery_date(meeting_start : Time, description : String) : Time
# Write your code for the 'Swift Scheduling' exercise in this file.
end
end
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