Add new practice exercise: swift-scheduling

config.json

@@ -226,6 +226,14 @@
         "prerequisites": [],
         "difficulty": 5
       },
+      {
+        "slug": "swift-scheduling",
+        "name": "Swift Scheduling",
+        "uuid": "51691c60-f878-4c1d-94e0-9e38e1e974d2",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 5
+      },
       {
         "slug": "acronym",
         "name": "Acronym",

exercises/practice/swift-scheduling/.docs/instructions.md

@@ -0,0 +1,50 @@
+# 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.
+~~~~

exercises/practice/swift-scheduling/.docs/introduction.md

@@ -0,0 +1,6 @@
+# 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.

exercises/practice/swift-scheduling/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "jimmytty"
+  ],
+  "files": {
+    "solution": [
+      "swift-scheduling.sql"
+    ],
+    "test": [
+      "swift-scheduling_test.sql"
+    ],
+    "example": [
+      ".meta/example.sql"
+    ]
+  },
+  "blurb": "Convert delivery date descriptions to actual delivery dates.",
+  "source": "Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/pull/2536"
+}

exercises/practice/swift-scheduling/.meta/example.sql

@@ -0,0 +1,122 @@
+UPDATE "swift-scheduling"
+   SET result =
+       STRFTIME('%Y-%m-%dT%H:%M:%S', DATETIME(meeting_start, '+2 HOUR'))
+ WHERE date_description = 'NOW'
+;
+
+UPDATE "swift-scheduling"
+   SET result = STRFTIME(
+     '%Y-%m-%dT%H:%M:%S',
+     IIF(
+       TIME(meeting_start) < TIME('13:00'),
+       DATETIME(meeting_start, 'START OF DAY', '+17 HOUR'),
+       DATETIME(meeting_start, '+1 DAY', 'START OF DAY', '+13 HOUR')
+     )
+   )
+ WHERE date_description = 'ASAP'
+;
+
+UPDATE "swift-scheduling"
+   SET result = STRFTIME(
+     '%Y-%m-%dT%H:%M:%S',
+       IIF(
+         STRFTIME('%w', meeting_start) * 1  BETWEEN 1 AND 3,
+         DATETIME(meeting_start, 'WEEKDAY 5', 'START OF DAY', '+17 HOUR'),
+         DATETIME(meeting_start, 'WEEKDAY 0', 'START OF DAY', '+20 HOUR')
+       )
+   )
+ WHERE date_description = 'EOW'
+;
+
+UPDATE "swift-scheduling"
+   SET result = (
+     WITH cte (date_time) AS (
+       SELECT
+         IIF(
+           STRFTIME('%m', meeting_start) * 1 <
+           REPLACE(date_description, 'D', '') * 1,
+           DATETIME(
+             meeting_start,
+             'START OF YEAR',
+             PRINTF('+%d MONTH', REPLACE(date_description, 'D', '') - 1),
+             '+8 HOUR'
+           ),
+           DATETIME(
+             meeting_start,
+             'START OF YEAR',
+             '+1 YEAR',
+             PRINTF('+%d MONTH', REPLACE(date_description, 'D', '') - 1),
+             '+8 HOUR'
+           )
+         )
+     )
+     SELECT STRFTIME(
+       '%Y-%m-%dT%H:%M:%S',
+       IIF(
+         STRFTIME('%w', date_time) * 1 IN (6, 0),
+         DATETIME(date_time, 'WEEKDAY 1'),
+         date_time
+       )
+     )
+       FROM cte
+   )
+ WHERE SUBSTRING(date_description, -1) = 'M';
+
+DROP TABLE IF EXISTS quarters;
+CREATE TEMPORARY TABLE quarters (
+    quarter INTEGER NOT NULL,
+    month   INTEGER UNIQUE NOT NULL
+);
+INSERT INTO quarters
+VALUES (1,  1), (1,  2), (1,  3),
+       (2,  4), (2,  5), (2,  6),
+       (3,  7), (3,  8), (3,  9),
+       (4, 10), (4, 11), (4, 12);
+
+UPDATE "swift-scheduling"
+   SET result = (
+     WITH cte (date_time) AS (
+       SELECT
+         IIF(
+           (SELECT quarter <= SUBSTRING(date_description, 2, 1) * 1
+              FROM quarters
+             WHERE month = STRFTIME('%m', meeting_start) * 1
+           ),
+           DATETIME(
+             meeting_start,
+             'START OF YEAR',
+             (SELECT PRINTF('+%d MONTH', month)
+                FROM quarters
+               WHERE quarter = SUBSTRING(date_description, 2, 1) * 1
+               ORDER BY month DESC
+               LIMIT 1
+             ),
+             '-1 DAY',
+             '+8 HOUR'
+           ),
+           DATETIME(
+             meeting_start,
+             'START OF YEAR',
+             '+1 YEAR',
+             (SELECT PRINTF('+%d MONTH', month)
+                FROM quarters
+               WHERE quarter = SUBSTRING(date_description, 2, 1) * 1
+               ORDER BY month DESC
+               LIMIT 1
+             ),
+             '-1 DAY',
+             '+8 HOUR'
+           )
+         )
+     )
+     SELECT STRFTIME(
+       '%Y-%m-%dT%H:%M:%S',
+       IIF(
+         STRFTIME('%w', date_time) * 1 IN (6, 0),
+         DATETIME(date_time, '-3 DAY', 'WEEKDAY 5'),
+         date_time
+       )
+     )
+       FROM cte
+   )
+ WHERE SUBSTRING(date_description, 1, 1) = 'Q';

exercises/practice/swift-scheduling/.meta/tests.toml

@@ -0,0 +1,58 @@
+# 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"

exercises/practice/swift-scheduling/create_fixture.sql

@@ -0,0 +1,9 @@
+DROP TABLE IF EXISTS "swift-scheduling";
+CREATE TABLE "swift-scheduling" (
+    meeting_start    TEXT NOT NULL, -- datetime YYYY-MM-DDTHH:mm:ss
+    date_description TEXT NOT NULL,
+    result           TEXT           -- datetime YYYY-MM-DDTHH:mm:ss
+);
+
+.mode csv
+.import ./data.csv "swift-scheduling"

exercises/practice/swift-scheduling/create_test_table.sql

@@ -0,0 +1,35 @@
+DROP TABLE IF EXISTS tests;
+CREATE TABLE IF NOT EXISTS tests (
+    -- uuid and description are taken from the test.toml file
+    uuid TEXT PRIMARY KEY,
+    description TEXT NOT NULL,
+    -- The following section is needed by the online test-runner
+    status TEXT DEFAULT 'fail',
+    message TEXT,
+    output TEXT,
+    test_code TEXT,
+    task_id INTEGER DEFAULT NULL,
+    -- Here are columns for the actual tests
+    meeting_start TEXT NOT NULL, -- datetime YYYY-MM-DDTHH:mm:ss
+    date_description TEXT NOT NULL,
+    expected TEXT NOT NULL
+);
+
+INSERT INTO tests (uuid, description, meeting_start, date_description, expected)
+VALUES
+        ('1d0e6e72-f370-408c-bc64-5dafa9c6da73','NOW translates to two hours later','2012-02-13T09:00:00','NOW','2012-02-13T11:00:00'),
+        ('93325e7b-677d-4d96-b017-2582af879dc2','ASAP before one in the afternoon translates to today at five in the afternoon','1999-06-03T09:45:00','ASAP','1999-06-03T17:00:00'),
+        ('cb4252a3-c4c1-41f6-8b8c-e7269733cef8','ASAP at one in the afternoon translates to tomorrow at one in the afternoon','2008-12-21T13:00:00','ASAP','2008-12-22T13:00:00'),
+        ('6fddc1ea-2fe9-4c60-81f7-9220d2f45537','ASAP after one in the afternoon translates to tomorrow at one in the afternoon','2008-12-21T14:50:00','ASAP','2008-12-22T13:00:00'),
+        ('25f46bf9-6d2a-4e95-8edd-f62dd6bc8a6e','EOW on Monday translates to Friday at five in the afternoon','2025-02-03T16:00:00','EOW','2025-02-07T17:00:00'),
+        ('0b375df5-d198-489e-acee-fd538a768616','EOW on Tuesday translates to Friday at five in the afternoon','1997-04-29T10:50:00','EOW','1997-05-02T17:00:00'),
+        ('4afbb881-0b5c-46be-94e1-992cdc2a8ca4','EOW on Wednesday translates to Friday at five in the afternoon','2005-09-14T11:00:00','EOW','2005-09-16T17:00:00'),
+        ('e1341c2b-5e1b-4702-a95c-a01e8e96e510','EOW on Thursday translates to Sunday at eight in the evening','2011-05-19T08:30:00','EOW','2011-05-22T20:00:00'),
+        ('bbffccf7-97f7-4244-888d-bdd64348fa2e','EOW on Friday translates to Sunday at eight in the evening','2022-08-05T14:00:00','EOW','2022-08-07T20:00:00'),
+        ('d651fcf4-290e-407c-8107-36b9076f39b2','EOW translates to leap day','2008-02-25T10:30:00','EOW','2008-02-29T17:00:00'),
+        ('439bf09f-3a0e-44e7-bad5-b7b6d0c4505a','2M before the second month of this year translates to the first workday of the second month of this year','2007-01-02T14:15:00','2M','2007-02-01T08:00:00'),
+        ('86d82e83-c481-4fb4-9264-625de7521340','11M in the eleventh month translates to the first workday of the eleventh month of next year','2013-11-21T15:30:00','11M','2014-11-03T08:00:00'),
+        ('0d0b8f6a-1915-46f5-a630-1ff06af9da08','4M in the ninth month translates to the first workday of the fourth month of next year','2019-11-18T15:15:00','4M','2020-04-01T08:00:00'),
+        ('06d401e3-8461-438f-afae-8d26aa0289e0','Q1 in the first quarter translates to the last workday of the first quarter of this year','2003-01-01T10:45:00','Q1','2003-03-31T08:00:00'),
+        ('eebd5f32-b16d-4ecd-91a0-584b0364b7ed','Q4 in the second quarter translates to the last workday of the fourth quarter of this year','2001-04-09T09:00:00','Q4','2001-12-31T08:00:00'),
+        ('c920886c-44ad-4d34-a156-dc4176186581','Q3 in the fourth quarter translates to the last workday of the third quarter of next year','2022-10-06T11:00:00','Q3','2023-09-29T08:00:00');

exercises/practice/swift-scheduling/data.csv

@@ -0,0 +1,16 @@
+"2012-02-13T09:00:00","NOW",""
+"1999-06-03T09:45:00","ASAP",""
+"2008-12-21T13:00:00","ASAP",""
+"2008-12-21T14:50:00","ASAP",""
+"2025-02-03T16:00:00","EOW",""
+"1997-04-29T10:50:00","EOW",""
+"2005-09-14T11:00:00","EOW",""
+"2011-05-19T08:30:00","EOW",""
+"2022-08-05T14:00:00","EOW",""
+"2008-02-25T10:30:00","EOW",""
+"2007-01-02T14:15:00","2M",""
+"2013-11-21T15:30:00","11M",""
+"2019-11-18T15:15:00","4M",""
+"2003-01-01T10:45:00","Q1",""
+"2001-04-09T09:00:00","Q4",""
+"2022-10-06T11:00:00","Q3",""

exercises/practice/swift-scheduling/swift-scheduling.sql

@@ -0,0 +1,8 @@
+-- Schema:
+-- CREATE TABLE "swift-scheduling" (
+--     meeting_start    TEXT NOT NULL, -- datetime YYYY-MM-DDTHH:mm:ss
+--     date_description TEXT NOT NULL,
+--     result           TEXT           -- datetime YYYY-MM-DDTHH:mm:ss
+-- );
+--
+-- Task: update swift-scheduling table and set the result based on the meeting_start and description.

exercises/practice/swift-scheduling/swift-scheduling_test.sql

@@ -0,0 +1,40 @@
+-- Create database:
+.read ./create_fixture.sql
+
+-- Read user student solution and save any output as markdown in user_output.md:
+.mode markdown
+.output user_output.md
+.read ./swift-scheduling.sql
+.output
+
+-- Create a clean testing environment:
+.read ./create_test_table.sql
+
+-- Comparison of user input and the tests updates the status for each test:
+UPDATE tests
+SET status = 'pass'
+FROM (SELECT meeting_start, date_description, result FROM "swift-scheduling") AS actual
+WHERE (actual.meeting_start, actual.date_description, actual.result) = (tests.meeting_start, tests.date_description, tests.expected);
+
+-- Update message for failed tests to give helpful information:
+UPDATE tests
+SET message = (
+    'Result for "'
+    || tests.meeting_start || ', ' || tests.date_description
+    || '"'
+    || ' is <' || COALESCE(actual.result, 'NULL')
+    || '> but should be <' || tests.expected || '>'
+)
+FROM (SELECT meeting_start, date_description, result FROM "swift-scheduling") AS actual
+WHERE (actual.meeting_start, actual.date_description) = (tests.meeting_start, tests.date_description) AND tests.status = 'fail';
+
+-- Save results to ./output.json (needed by the online test-runner)
+.mode json
+.once './output.json'
+SELECT description, status, message, output, test_code, task_id
+FROM tests;
+
+-- Display test results in readable form for the student:
+.mode table
+SELECT description, status, message
+FROM tests;