From 574d128cb664bc600ad7df92506d93cafc47dba6 Mon Sep 17 00:00:00 2001
From: Elizabeth Cray <liz@cray.lgbt>
Date: Wed, 12 Jul 2023 11:21:53 -0400
Subject: [PATCH] Dependency checking

---
 Installer/Dexif_Installer/Helper.cs          | 29 ++++++++++
 Installer/Dexif_Installer/MainWindow.xaml    |  2 +
 Installer/Dexif_Installer/MainWindow.xaml.cs | 60 ++++++++++++++++----
 3 files changed, 80 insertions(+), 11 deletions(-)
 create mode 100644 Installer/Dexif_Installer/Helper.cs

diff --git a/Installer/Dexif_Installer/Helper.cs b/Installer/Dexif_Installer/Helper.cs
new file mode 100644
index 0000000..766d38a
--- /dev/null
+++ b/Installer/Dexif_Installer/Helper.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Dexif_Installer {
+  class Helper {
+    // https://stackoverflow.com/a/3856090/4708786
+    public static bool ExistsOnPath(string fileName) {
+      return GetFullPath(fileName) != null;
+    }
+
+    public static string GetFullPath(string fileName) {
+      if (File.Exists(fileName)) { 
+        return Path.GetFullPath(fileName);
+      }
+      var values = Environment.GetEnvironmentVariable("PATH");
+      foreach (var path in values.Split(Path.PathSeparator)) {
+        var fullPath = Path.Combine(path, fileName);
+        if (File.Exists(fullPath)) {
+          return fullPath;
+        }
+      }
+      return null;
+    }
+  }
+}
diff --git a/Installer/Dexif_Installer/MainWindow.xaml b/Installer/Dexif_Installer/MainWindow.xaml
index f29420b..2b0e1a4 100644
--- a/Installer/Dexif_Installer/MainWindow.xaml
+++ b/Installer/Dexif_Installer/MainWindow.xaml
@@ -6,6 +6,8 @@
         xmlns:fa="http://schemas.fontawesome.io/icons/"
         xmlns:local="clr-namespace:Dexif_Installer"
         mc:Ignorable="d"
+        WindowStartupLocation="CenterScreen"
+        Loaded="WindowLoaded"
         Title="DEXIF Installer" Height="300" Width="510" >
   <Grid Background="{DynamicResource PolarNight_0_Brush}">
     <Grid.RowDefinitions>
diff --git a/Installer/Dexif_Installer/MainWindow.xaml.cs b/Installer/Dexif_Installer/MainWindow.xaml.cs
index 7130ed9..019987d 100644
--- a/Installer/Dexif_Installer/MainWindow.xaml.cs
+++ b/Installer/Dexif_Installer/MainWindow.xaml.cs
@@ -21,6 +21,7 @@ using System.Windows.Shapes;
  *  - Install Exec
  *  - Install Reg Keys
  *  - Add to "Installed Programs"
+ *  - Add uninstall functionality
  *  
  * (Very Very Future TODO)
  *  - Recursion Support for Directories
@@ -28,16 +29,53 @@ using System.Windows.Shapes;
  *  - Configurable Suffix / Etc. Opts
 */
 
-namespace Dexif_Installer
-{
-    /// <summary>
-    /// Interaction logic for MainWindow.xaml
-    /// </summary>
-    public partial class MainWindow : Window
-    {
-        public MainWindow()
-        {
-            InitializeComponent();
-        }
+namespace Dexif_Installer {
+  /// <summary>
+  /// Interaction logic for MainWindow.xaml
+  /// </summary>
+  public partial class MainWindow : Window {
+    public MainWindow() {
+      InitializeComponent();
     }
+
+    public void WindowLoaded(object sender, RoutedEventArgs e) {
+      EnsureChocolatey();
+      EnsureExiftool();
+    }
+
+    private void EnsureChocolatey() {
+      String ChocolateyExecutable = "choco.exe";
+      String DefaultInstallPath = "C:\\ProgramData\\chocolatey\\bin\\";
+      if (Helper.ExistsOnPath(DefaultInstallPath + ChocolateyExecutable)) {
+        Status_Chocolatey.Icon = FontAwesome.WPF.FontAwesomeIcon.CheckCircleOutline;
+        Locate_Chocolatey.Content = "Change";
+        Status_Chocolatey.ToolTip = DefaultInstallPath + ChocolateyExecutable;
+      } else if (Helper.ExistsOnPath(ChocolateyExecutable)) {
+        Status_Chocolatey.Icon = FontAwesome.WPF.FontAwesomeIcon.CheckCircleOutline;
+        Locate_Chocolatey.Content = "Change";
+        Status_Chocolatey.ToolTip = Helper.GetFullPath(ChocolateyExecutable);
+      } else {
+        Status_Chocolatey.Icon = FontAwesome.WPF.FontAwesomeIcon.TimesCircleOutline;
+        Status_Chocolatey.ToolTip = "Chocolatey not found.";
+      }
+      return;
+    }
+    private void EnsureExiftool() {
+      String ExiftoolExecutable = "exiftool.exe";
+      String DefaultInstallPath = " C:\\ProgramData\\chocolatey\\bin\\";
+      if (Helper.ExistsOnPath(DefaultInstallPath + ExiftoolExecutable)) {
+        Status_Exiftool.Icon = FontAwesome.WPF.FontAwesomeIcon.CheckCircleOutline;
+        Locate_Exiftool.Content = "Change";
+        Status_Exiftool.ToolTip = DefaultInstallPath + ExiftoolExecutable;
+      } else if (Helper.ExistsOnPath(ExiftoolExecutable)) {
+        Status_Exiftool.Icon = FontAwesome.WPF.FontAwesomeIcon.CheckCircleOutline;
+        Locate_Exiftool.Content = "Change";
+        Status_Exiftool.ToolTip = Helper.GetFullPath(ExiftoolExecutable);
+      } else {
+        Status_Exiftool.Icon = FontAwesome.WPF.FontAwesomeIcon.TimesCircleOutline;
+        Status_Exiftool.ToolTip = "Exiftool not found.";
+      }
+      return;
+    }
+  }
 }