From 40525e4f0ff494a3b5bf9cebad5d00ac25a3d840 Mon Sep 17 00:00:00 2001
From: Joel Stålnacke <joel@saker.fi>
Date: Fri, 1 Aug 2025 20:22:50 +0300
Subject: Basic domain logic

---
 TJLaskuri.Core/Library.fs            | 27 +++++++++++++++++++++++
 TJLaskuri.Core/TJLaskuri.Core.fsproj | 13 +++++++++++
 TJLaskuri.Core/Types.fs              | 42 ++++++++++++++++++++++++++++++++++++
 3 files changed, 82 insertions(+)
 create mode 100644 TJLaskuri.Core/Library.fs
 create mode 100644 TJLaskuri.Core/TJLaskuri.Core.fsproj
 create mode 100644 TJLaskuri.Core/Types.fs

(limited to 'TJLaskuri.Core')

diff --git a/TJLaskuri.Core/Library.fs b/TJLaskuri.Core/Library.fs
new file mode 100644
index 0000000..aa7b7ea
--- /dev/null
+++ b/TJLaskuri.Core/Library.fs
@@ -0,0 +1,27 @@
+namespace TJLaskuri.Core
+
+open System
+
+module Domain =
+    // TODO: More precise time: hours, minutes
+    // TODO: Time until service starts
+
+    let getStartDate kontingent =
+        match serviceStartDates.TryGetValue(kontingent) with
+        | true, startDate -> Some startDate
+        | false, _ -> None
+
+    let getEndDate kontingent serviceTime =
+        getStartDate kontingent
+        |> Option.map (fun startDate ->
+            ServiceTime.getDays serviceTime
+            |> fun x -> x - 1 // Count start date as well
+            |> startDate.AddDays)
+
+    let getTimeCompleted kontingent (now : DateTime) =
+        getStartDate kontingent
+        |> Option.map (fun date -> now.AddDays(1) - date)
+
+    let getTimeLeft kontingent serviceTime (now : DateTime) =
+        getEndDate kontingent serviceTime
+        |> Option.map (fun date -> date - now)
diff --git a/TJLaskuri.Core/TJLaskuri.Core.fsproj b/TJLaskuri.Core/TJLaskuri.Core.fsproj
new file mode 100644
index 0000000..c3b606a
--- /dev/null
+++ b/TJLaskuri.Core/TJLaskuri.Core.fsproj
@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="Types.fs" />
+    <Compile Include="Library.fs" />
+  </ItemGroup>
+
+</Project>
diff --git a/TJLaskuri.Core/Types.fs b/TJLaskuri.Core/Types.fs
new file mode 100644
index 0000000..0c5b2d4
--- /dev/null
+++ b/TJLaskuri.Core/Types.fs
@@ -0,0 +1,42 @@
+namespace TJLaskuri.Core
+
+open System
+open System.Collections.Generic
+
+[<AutoOpen>]
+module Types =
+    /// Saapumiserä/kontingent N/Year
+    /// For example, 2/25 is { N = 2; Year = 2025 }
+    // Year field is first so that kontingents are sorted year first
+    type Kontingent = { Year : int; N : int }
+
+    type ServiceTime =
+        | OneSixFive
+        | TwoFiveFive
+        | ThreeFourSeven
+
+    module ServiceTime =
+        let getDays = function
+            | OneSixFive -> 165
+            | TwoFiveFive -> 255
+            | ThreeFourSeven -> 347
+
+    let kontingent n year = { N = n; Year = year }
+
+    let serviceStartDates =
+        let date day month year =
+            DateTime((year : int), month, day)
+        let entry n year endDate =
+            let k = kontingent n year
+            KeyValuePair<Kontingent, DateTime>(
+                k, endDate)
+
+        Dictionary<Kontingent, DateTime>([
+            entry 2 2024 (date 8 7 2024)
+            entry 1 2025 (date 6 1 2025)
+            entry 2 2025 (date 7 7 2025)
+            entry 1 2026 (date 5 1 2026)
+            entry 2 2026 (date 6 7 2026)
+            entry 1 2027 (date 4 1 2027)
+            entry 2 2027 (date 5 7 2027)
+        ])
-- 
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