Major advancements

Added a couple of test to check for acurate behavior in certain conditions
Added the capability to check if a database was modified
New commandline arguments

src/Pacserver.Tests/Pacserver.Tests.csproj

@@ -9,6 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.11.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

src/Pacserver.Tests/Usings.cs

@@ -1 +1,2 @@
-global using Xunit;
+global using Xunit;
+global using FluentAssertions;

src/Pacserver.Tests/checkForNewerStuffTest.cs

@@ -0,0 +1,60 @@
+using Pacserver.Utils;
+
+namespace Pacserver.Tests;
+
+public class checkForNewerStuffTest {
+    [Fact]
+    public void checkForNewerPackages_throwsExceptionIfNoFilesExist() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+
+        // Act
+        Action act = () => utils.diff("/tmp/before_update.txt", "/tmp/after_update.txt");
+
+        // Assert
+        act.Should().Throw<FileNotFoundException>().WithMessage("Necessary files could not be found");
+    }
+
+    [Fact]
+    public void getEveryPackageNameAndVersionViaFolderName_createsFiles() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+        utils.readPacmanConfig();
+
+        // Act
+        utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
+        utils.getEveryPackageNameAndVersionViaFolderName("/tmp/after_update.txt");
+
+        // Assert
+        File.Exists("/tmp/before_update.txt").Should().BeTrue();
+        File.Exists("/tmp/after_update.txt").Should().BeTrue();
+    }
+
+    [Fact]
+    public void packageNamesAndVersion_notEmpty() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+        utils.readPacmanConfig();
+        utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
+
+        // Act
+        List<String> packageList = utils.packageNamesAndVersion;
+
+        // Assert
+        packageList.Should().NotBeNullOrEmpty();
+    }
+
+    [Fact]
+    public void getEveryPackageNameAndVersionViaFolderName_throwsExceptionIfListIsEmpty() {
+        // Arrange
+        PacserverUtils utils = new PacserverUtils();
+        Directory.CreateDirectory("/tmp/local");
+        utils.pacmanDatabaseDirectory = "/tmp/";
+
+        // Act
+        Action act = () => utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
+
+        // Assert
+        act.Should().Throw<Exception>().WithMessage("How did you execute this without any packages?");
+    }
+}

src/Pacserver/Pacserver.cs

@@ -4,7 +4,7 @@ using System.Text.RegularExpressions;
 namespace Pacserver.Utils;
 public class PacserverUtils {
     public string pacmanCacheDirectory = string.Empty;
-    public static string pacmanDatabaseDirectory = string.Empty;
+    public string pacmanDatabaseDirectory = string.Empty;
     public static List<String> pathsToDetermine = new List<String>() { "CacheDir", "DBPath" };
     public void readPacmanConfig() {
         using (StreamReader file = new StreamReader("/etc/pacman.conf")) {
@@ -36,24 +36,77 @@ public class PacserverUtils {
         }
     }
 
-    private List<String> packageNamesAndVersion = new List<String>();
+    public List<String> packageNamesAndVersion = new List<String>();
     public void getEveryPackageNameAndVersionViaFolderName(string filePath) {
         string[] directories = Directory.GetDirectories(pacmanDatabaseDirectory + "local/");
         foreach (string directory in directories) {
             packageNamesAndVersion.Add(new DirectoryInfo(directory).Name);
         }
-        File.WriteAllLines(filePath, packageNamesAndVersion);
+
+        if (packageNamesAndVersion.Capacity > 0) {
+            File.WriteAllLines(filePath, packageNamesAndVersion);
+        } else {
+            throw new Exception("How did you execute this without any packages?");
+        }
     }
 
-    public List<String> newerPackages = new List<String>();
-    public void checkForNewerPackages() {
-        if (File.Exists("/tmp/before_update.txt") && File.Exists("/tmp/after_update.txt")) {
-            newerPackages = File.ReadAllLines("/tmp/after_update.txt").Except(File.ReadLines("/tmp/before_update.txt")).ToList();
+    public List<String> diffOfPackagesOrDatabases = new List<String>();
+    public void diff(string before, string after) {
+        if (File.Exists(before) && File.Exists(after)) {
+            diffOfPackagesOrDatabases = File.ReadAllLines(after).Except(File.ReadLines(before)).ToList();
         } else {
             throw new FileNotFoundException("Necessary files could not be found");
         }
     }
 
+    public List<String> databases = new List<String>();
+    public void checkIfDatabasesWereModified(string mode, string filePath) {
+        string[] databases = Directory.GetFiles(pacmanDatabaseDirectory + "sync/");
+
+        // if (mode == "nuke") {
+        //     using (File.Open(filePath, FileMode.Truncate, FileAccess.ReadWrite, FileShare.Delete)) {
+        //         File.Delete(filePath);
+        //     }
+        // }
+
+        foreach (string database in databases) {
+            switch (mode) {
+                case "before":
+                    if (!File.Exists(filePath)) {
+                        using (File.Open(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite)) {
+                            using (StreamWriter sw = new StreamWriter(filePath)) {
+                                sw.WriteLine(database + " " + File.GetLastAccessTime(database));
+                            }
+                        }
+                    } else if (File.Exists(filePath)) {
+                        using (File.Open(filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite)) {
+                            using (var sw = new StreamWriter(filePath, true)) {
+                                sw.WriteLine(database + " " + File.GetLastAccessTime(database));
+                            }
+                        }
+                    }
+                    break;
+                case "after":
+                    if (!File.Exists(filePath)) {
+                        using (File.Open(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite)) {
+                            using (StreamWriter sw = new StreamWriter(filePath)) {
+                                sw.WriteLine(database + " " + File.GetLastAccessTime(database));
+                            }
+                        }
+                    } else if (File.Exists(filePath)) {
+                        using (File.Open(filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite)) {
+                            using (var sw = new StreamWriter(filePath, true)) {
+                                sw.WriteLine(database + " " + File.GetLastAccessTime(database));
+                            }
+                        }
+                    }
+                    break;
+                default:
+                    throw new ArgumentException("No valid mode was selected");
+            }
+        }
+    }
+
     private static List<String> newerPackagesAndDatabases = new List<String>();
     public async void transferPacmanCache() {
         HttpClient client = new HttpClient();

src/Pacserver/Program.cs

@@ -6,7 +6,7 @@ public class Program {
             Console.ForegroundColor = ConsoleColor.Red;
             Console.WriteLine("Please specify an option.");
             Console.ResetColor();
-            Console.WriteLine("Possible options are: determinePacmanCacheDirectory");
+            Console.WriteLine("Possible options are: determinePacmanCacheDirectory, packagesBefore, packagesAfter, diffPackages, databasesBefore, databasesAfter, diffDatabases");
             return;
         }
 
@@ -17,17 +17,31 @@ public class Program {
                 utils.readPacmanConfig();
                 Console.WriteLine(utils.pacmanCacheDirectory);
                 break;
-            case "before":
+            case "packagesBefore":
                 utils.readPacmanConfig();
                 utils.getEveryPackageNameAndVersionViaFolderName("/tmp/before_update.txt");
                 break;
-            case "after":
+            case "packagesAfter":
                 utils.readPacmanConfig();
                 utils.getEveryPackageNameAndVersionViaFolderName("/tmp/after_update.txt");
                 break;
-            case "diff":
-                utils.checkForNewerPackages();
-                Console.WriteLine(utils.newerPackages);
+            case "diffPackages":
+                utils.diff("/tmp/before_update.txt", "/tmp/after_update.txt");
+                string packages = string.Join(",", utils.diffOfPackagesOrDatabases);
+                Console.WriteLine(packages);
+                break;
+            case "databasesBefore":
+                utils.readPacmanConfig();
+                utils.checkIfDatabasesWereModified("before", "/tmp/databases_before.txt");
+                break;
+            case "databasesAfter":
+                utils.readPacmanConfig();
+                utils.checkIfDatabasesWereModified("after", "/tmp/databases_after.txt");
+                break;
+            case "diffDatabases":
+                utils.diff("/tmp/databases_before.txt", "/tmp/databases_after.txt");
+                string databases = string.Join(",", utils.diffOfPackagesOrDatabases);
+                Console.WriteLine(databases);
                 break;
             default:
                 Console.ForegroundColor = ConsoleColor.Red;