Feature/MAUI app#84

AppShell.xaml

@@ -4,11 +4,22 @@
     xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
     xmlns:local="clr-namespace:MauiApp1"
+    xmlns:views="clr-namespace:MauiApp1.Views"
     Shell.FlyoutBehavior="Disabled">
 
-    <ShellContent
-        Title="Home"
-        ContentTemplate="{DataTemplate local:MainPage}"
-        Route="MainPage" />
+    <TabBar>
+        <ShellContent
+            Title="Home"
+            ContentTemplate="{DataTemplate local:MainPage}"
+            Route="MainPage" />
 
+        <ShellContent
+            Title="Request Specialists"
+            ContentTemplate="{DataTemplate views:RequestSpecialists}" />
+
+        <ShellContent
+            Title="Accept Specialist Requests"
+            ContentTemplate="{DataTemplate views:AcceptSpecialistRequests}" />
+    </TabBar>
+
 </Shell>

DB-Manager.csproj

@@ -28,6 +28,7 @@
 		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
 		<TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
 		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
+		<DefaultLanguage>en</DefaultLanguage>
 	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net7.0-ios|AnyCPU'">
@@ -61,4 +62,19 @@
 		</PackageReference>
 	</ItemGroup>
 
+	<ItemGroup>
+	  <Compile Update="Views\RequestSpecialists.xaml.cs">
+	    <DependentUpon>RequestSpecialists.xaml</DependentUpon>
+	  </Compile>
+	</ItemGroup>
+
+	<ItemGroup>
+	  <MauiXaml Update="Views\AcceptSpecialistRequests.xaml">
+	    <Generator>MSBuild:Compile</Generator>
+	  </MauiXaml>
+	  <MauiXaml Update="Views\RequestSpecialists.xaml">
+	    <Generator>MSBuild:Compile</Generator>
+	  </MauiXaml>
+	</ItemGroup>
+
 </Project>

DatabaseInitialiser.cs

@@ -1,6 +1,7 @@
 using Microsoft.Data.Sqlite;
 using System;
 using System.Collections.Generic;
+using System.Xml.Linq;
 
 /// <summary>
 /// Initializes a SQLite database by creating the necessary tables.
@@ -85,7 +86,9 @@ private static List<string> GetTableCreationCommands()
             "CREATE TABLE IF NOT EXISTS rota_type (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS equipment_type (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS organisation_type (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
-            "CREATE TABLE IF NOT EXISTS order_status (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
+			"CREATE TABLE IF NOT EXISTS organisation (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
+			"CREATE TABLE IF NOT EXISTS person (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL, FieldName TEXT NOT NULL)",
+			"CREATE TABLE IF NOT EXISTS order_status (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS resource_types (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS room_type (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS room_use_type (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
@@ -98,9 +101,20 @@ private static List<string> GetTableCreationCommands()
             "CREATE TABLE IF NOT EXISTS assignment_status (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS position_status (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
             "CREATE TABLE IF NOT EXISTS role (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
-            "CREATE TABLE IF NOT EXISTS skill (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
+			"CREATE TABLE IF NOT EXISTS skill (Name TEXT NOT NULL PRIMARY KEY)",
             "CREATE TABLE IF NOT EXISTS team_member (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
-            "CREATE TABLE IF NOT EXISTS partner_agencies (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)"
-        };
+            "CREATE TABLE IF NOT EXISTS partner_agencies (Id INTEGER PRIMARY KEY AUTOINCREMENT, Name TEXT NOT NULL)",
+			"CREATE TABLE IF NOT EXISTS skills_request (Id INTEGER PRIMARY KEY AUTOINCREMENT, skill_name TEXT, " +
+			"organisation_id INTEGER, request_date DATE, requested_by INTEGER, number_required INTEGER, " +
+			"start_date DATE, end_date DATE, status TEXT CHECK (status IN ('Pending', 'Approved'))," +
+            " confirmed_date DATE, FOREIGN KEY (skill_name) REFERENCES skill(Name), " +
+            "FOREIGN KEY (organisation_id) REFERENCES organisation(Id),FOREIGN KEY (requested_by) REFERENCES person(Id));"
+
+            //TEST Values for Specialist Requests
+			,"INSERT OR IGNORE INTO person (Id, Name, FieldName) VALUES (0,'John Doe', 'Healthcare');"
+			,"INSERT OR IGNORE INTO organisation (Id, Name) VALUES (0, 'No Organisation'),(2, 'Doctors Without Borders'),(2, 'Care'),(3, 'International Medical Corps');"
+			,"INSERT OR IGNORE INTO skill (Name) VALUES ('rescue'),('rebuild Infrastructure'),('mental & emotional support'),('first aid');"
+            //,"DROP TABLE IF EXISTS skills_request;"
+	};
     }
 }

DatabaseOperations.cs

@@ -74,24 +74,48 @@ public int GetRecordIdByName(string tableName, string name)
         command.CommandText = commandText;
         command.Parameters.AddWithValue("@name", name);
 
-        var result = command.ExecuteScalar();
+        var result = Convert.ToInt32(command.ExecuteScalar());
 
-        if (result != null && result is int id)
+		if (result is int id)
         {
             return id;
         }
 
-        throw new Exception($"No record with the name '{name}' found in table '{tableName}'.");
+        throw new Exception($"No record with the name '{name}' found in table '{tableName}'." );
     }
 
 
-    /// <summary>
-    /// Updates a record's name in the specified table based on the provided ID.
-    /// </summary>
-    /// <param name="tableName">Target table name.</param>
-    /// <param name="id">ID of the record to update.</param>
-    /// <param name="newName">New name to set for the record.</param>
-    public void UpdateRecord(string tableName, int id, string newName)
+	/// <summary>
+	/// Retrieves the name of a record from a specified table based on its ID.
+	/// </summary>
+	/// <param name="tableName">The table to search in.</param>
+	/// <param name="id">The id of the record to search for.</param>
+	/// <returns>The ID of the record if found; otherwise, throws an exception.</returns>
+	public string GetRecordNameById(string tableName, int id)
+	{
+		var commandText = $"SELECT Id FROM {tableName} WHERE Id = @Id LIMIT 1";
+
+		using var command = _connection.CreateCommand();
+		command.CommandText = commandText;
+		command.Parameters.AddWithValue("@Id", id);
+
+		var result = command.ExecuteScalar();
+
+		if (result != null && result is string name)
+		{
+			return name;
+		}
+
+		throw new Exception($"No record with the name '{id}' found in table '{tableName}'.");
+	}
+
+	/// <summary>
+	/// Updates a record's name in the specified table based on the provided ID.
+	/// </summary>
+	/// <param name="tableName">Target table name.</param>
+	/// <param name="id">ID of the record to update.</param>
+	/// <param name="newName">New name to set for the record.</param>
+	public void UpdateRecord(string tableName, int id, string newName)
     {
         var commandText = $"UPDATE {tableName} SET Name = @name WHERE Id = @id";
         ExecuteNonQuery(commandText, ("@name", newName), ("@id", id));

Models/SkillRequest.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MauiApp1.Models
+{
+	public class SkillRequest
+	{
+		public int Id { get; set; }
+		public string SkillName { get; set; }
+		public int OrganisationId { get; set; }
+		public DateTime RequestDate { get; set; }
+		public int RequestedBy { get; set; }
+		public int NumberRequired { get; set; }
+		public DateTime StartDate { get; set; }
+		public DateTime EndDate { get; set; }
+		public string Status { get; set; }
+		public DateTime ConfirmedDate { get; set; }
+	}
+}

Services/ISpecialistRequestService.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using MauiApp1.Models;
+
+namespace MauiApp1.Services
+{
+	internal interface ISpecialistRequestService
+	{
+		/// <summary>
+		/// Inserts a new unapporved Specialist Request in the skills_request table
+		/// (confirmed_date can not be null so it is set to MinValue aswell as organisation.
+		/// requested_by is a dummy Value)
+		/// </summary>
+		/// <param name="skillName">Required Skill</param>
+		/// <param name="numberRequired">Number of Persons Required</param>
+		/// <param name="startDate">Start Date</param>
+		/// <param name="endDate">End Date</param>
+		void AddUnapprovedSkillRequest(string skillName, int numberRequired, 
+			DateTime startDate,DateTime endDate);
+
+		/// <summary>
+		/// Returns a list of SkillRequest objects by Calling a 
+		/// SELECT statement for skills_request
+		/// </summary>
+		/// <returns>A list of SkillRequest objects, created from the database</returns>
+		List<SkillRequest> GetAllSkillRequests();
+
+		/// <summary>
+		/// Approve Request by assingning the date of approval,
+		/// changing the Status to Approved, and Assignig the Corresponding Organisation
+		/// </summary>
+		/// <param name="id">Id of Request</param>
+		/// <param name="organisationId">Id of Organisation</param>
+		void approveSkillRequest(int id, int organisationId);
+
+		void deleteSkillRequestById(int id);
+	}
+}

Services/SpecialistRequestService.cs

@@ -0,0 +1,150 @@
+using Microsoft.Data.Sqlite;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using MauiApp1.Models;
+
+namespace MauiApp1.Services
+{
+	/// <summary>
+	/// Service to Apply the required SQL Statements to Add new 
+	/// </summary>
+	internal class SpecialistRequestService : ISpecialistRequestService
+	{
+		private readonly SqliteConnection _connection;
+
+		/// <summary>
+		/// Creates a new database operation instance, initializing the connection to the SQLite database.
+		/// </summary>
+		/// <param name="connectionString">The SQLite database connection string.</param>
+		public SpecialistRequestService(string connectionString)
+		{
+			_connection = new SqliteConnection(connectionString);
+
+			try
+			{
+				_connection.Open();
+			}
+			catch (Exception ex)
+			{
+				throw new Exception("Error establishing database connection.", ex);
+			}
+		}
+
+		/// <summary>
+		/// Inserts a new unapporved Specialist Request in the skills_request table
+		/// (confirmed_date can not be null so it is set to MinValue aswell as organisation.
+		/// requested_by is a dummy Value)
+		/// </summary>
+		/// <param name="skillName">Required Skill</param>
+		/// <param name="numberRequired">Number of Persons Required</param>
+		/// <param name="startDate">Start Date</param>
+		/// <param name="endDate">End Date</param>
+		void ISpecialistRequestService.AddUnapprovedSkillRequest(string skillName, int numberRequired,
+			DateTime startDate, DateTime endDate)
+		{
+			var commandText = "INSERT INTO skills_request " +
+									  "(skill_name, organisation_id, request_date, requested_by, number_required, " +
+									  "start_date, end_date, status, confirmed_date) " +
+									  "VALUES " +
+									  "(@skill_name, @organisation_id, @request_date, @requested_by, @number_required, " +
+									  "@start_date, @end_date, @status, @confirmed_date)";
+
+			using (var command = new SqliteCommand(commandText, _connection))
+			{
+				command.Parameters.AddWithValue("@skill_name", skillName);
+				command.Parameters.AddWithValue("@organisation_id", 0); 
+				command.Parameters.AddWithValue("@request_date", DateTime.Today);
+				command.Parameters.AddWithValue("@requested_by", 0); // dummy value 
+				command.Parameters.AddWithValue("@number_required", numberRequired);
+				command.Parameters.AddWithValue("@start_date", startDate);
+				command.Parameters.AddWithValue("@end_date", endDate);
+				command.Parameters.AddWithValue("@status", "Pending");
+				command.Parameters.AddWithValue("@confirmed_date", DateTime.MinValue);
+
+				command.ExecuteNonQuery();
+			}
+		}
+
+		/// <summary>
+		/// Approve Request by assingning the date of approval,
+		/// changing the Status to Approved, and Assignig the Corresponding Organisation
+		/// </summary>
+		/// <param name="id">Id of Request</param>
+		/// <param name="organisationId">Id of Organisation</param>
+		void ISpecialistRequestService.approveSkillRequest(int id, int organisationId)
+		{
+			var currentDate = DateTime.Today;
+			var commandText = "UPDATE skills_request SET confirmed_date = @currentDate," +
+				" organisation_id = @organisationId, status = 'Approved' WHERE Id = @id";
+
+			using (var command = new SqliteCommand(commandText, _connection))
+			{
+				command.Parameters.AddWithValue("@currentDate", currentDate);
+				command.Parameters.AddWithValue("@organisationId", organisationId);
+				command.Parameters.AddWithValue("@id", id);
+
+				command.ExecuteNonQuery();
+			}
+		}
+
+		/// <summary>
+		/// Returns a list of SkillRequest objects by Calling a 
+		/// SELECT statement for skills_request
+		/// </summary>
+		/// <returns>A list of SkillRequest objects, created from the database</returns>
+		List<SkillRequest> ISpecialistRequestService.GetAllSkillRequests()
+		{
+			var skillRequests = new List<SkillRequest>();
+			var commandText = "SELECT * FROM skills_request";
+
+			using var command = _connection.CreateCommand();
+			command.CommandText = commandText;
+
+			using (var reader = command.ExecuteReader())
+			{
+				while (reader.Read())
+				{
+					SkillRequest skillRequest = CreateSkillRequestFromReader(reader);
+					skillRequests.Add(skillRequest);
+				}
+			}
+			return skillRequests;
+		}
+
+		void ISpecialistRequestService.deleteSkillRequestById(int id)
+		{
+			var commandText = $"DELETE FROM skills_request WHERE Id = @id";
+			using (var command = new SqliteCommand(commandText, _connection))
+			{
+				command.Parameters.AddWithValue("@id", id);
+
+				command.ExecuteNonQuery();
+			}
+		}
+		/// <summary>
+		/// Creates one SkillRequest object by transfering 
+		/// data from the reader.
+		/// </summary>
+		/// <param name="reader">Reading Database respose</param>
+		/// <returns></returns>
+		private SkillRequest CreateSkillRequestFromReader(SqliteDataReader reader)
+		{
+			return new SkillRequest
+			{
+				Id = reader.GetInt32(0),
+				SkillName = reader.GetString(1),
+				OrganisationId = reader.GetInt32(2),
+				RequestDate = reader.GetDateTime(3),
+				RequestedBy = reader.GetInt32(4),
+				NumberRequired = reader.GetInt32(5),
+				StartDate = reader.GetDateTime(6),
+				EndDate = reader.GetDateTime(7),
+				Status = reader.GetString(8),
+				ConfirmedDate = reader.GetDateTime(9)
+			};
+		}
+	}
+}