Merge pull request 'feature/autocomplete' (#8) from feature/autocomplete into master

Reviewed-on: #8

CarManager3Setup/CarManager3Setup.vdproj

@@ -21,6 +21,12 @@
         }
         "Entry"
         {
+        "MsmKey" = "8:_058C8316BA034FF38880D3C8838A3F74"
+        "OwnerKey" = "8:_UNDEFINED"
+        "MsmSig" = "8:_UNDEFINED"
+        }
+        "Entry"
+        {
         "MsmKey" = "8:_39292C9AEE694F0B982DDECDC0233E12"
         "OwnerKey" = "8:_UNDEFINED"
         "MsmSig" = "8:_UNDEFINED"
@@ -160,6 +166,26 @@
             "IsDependency" = "11:FALSE"
             "IsolateTo" = "8:"
             }
+            "{1FB2D0AE-D3B9-43D4-B9DD-F88EC61E35DE}:_058C8316BA034FF38880D3C8838A3F74"
+            {
+            "SourcePath" = "8:E:\\Development\\Scripts\\CM3Merge\\merged-cars.json"
+            "TargetName" = "8:car_data,json"
+            "Tag" = "8:"
+            "Folder" = "8:_91D306E0AE6B4CA09DB4A07129FBDD93"
+            "Condition" = "8:"
+            "Transitive" = "11:TRUE"
+            "Vital" = "11:TRUE"
+            "ReadOnly" = "11:FALSE"
+            "Hidden" = "11:FALSE"
+            "System" = "11:FALSE"
+            "Permanent" = "11:FALSE"
+            "SharedLegacy" = "11:FALSE"
+            "PackageAs" = "3:1"
+            "Register" = "3:1"
+            "Exclude" = "11:FALSE"
+            "IsDependency" = "11:FALSE"
+            "IsolateTo" = "8:"
+            }
             "{1FB2D0AE-D3B9-43D4-B9DD-F88EC61E35DE}:_39292C9AEE694F0B982DDECDC0233E12"
             {
             "SourcePath" = "8:D:\\Assets\\Car Manager\\Icon\\CarMgm_Icon.ico"
@@ -332,15 +358,15 @@
         {
         "Name" = "8:Microsoft Visual Studio"
         "ProductName" = "8:Car Manager 3"
-        "ProductCode" = "8:{24769DBA-B806-4E47-9F4C-17BC8AD0528E}"
-        "PackageCode" = "8:{6A7873AB-8003-4584-9969-B4AA7C461623}"
+        "ProductCode" = "8:{3979D343-890D-4FBC-B3FE-E88437307108}"
+        "PackageCode" = "8:{8B59CA5B-CD06-41DC-95A6-3323553D4997}"
         "UpgradeCode" = "8:{6FF57925-465E-4DB9-85DA-CE933191A3DD}"
         "AspNetVersion" = "8:2.0.50727.0"
         "RestartWWWService" = "11:FALSE"
         "RemovePreviousVersions" = "11:TRUE"
         "DetectNewerInstalledVersion" = "11:TRUE"
         "InstallAllUsers" = "11:FALSE"
-        "ProductVersion" = "8:1.4.1"
+        "ProductVersion" = "8:1.4.2"
         "Manufacturer" = "8:Jaro Digital"
         "ARPHELPTELEPHONE" = "8:"
         "ARPHELPLINK" = "8:"

CarManagerV3/App.config

@@ -16,6 +16,12 @@
             <setting name="AllowPrerelease" serializeAs="String">
                 <value>False</value>
             </setting>
+            <setting name="LastFetchedAutoCompletions" serializeAs="String">
+                <value>2026-01-01</value>
+            </setting>
+            <setting name="FetchAutoCompletionsInterval" serializeAs="String">
+                <value>24.00:00:00</value>
+            </setting>
         </CarManagerV3.Properties.Settings>
     </userSettings>
 </configuration>

CarManagerV3/Classes/CarManufacturer.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CarManagerV3.Classes
+{
+    internal class CarManufacturer
+    {
+        public string Name { get; set; }
+        public List<string> Models { get; set; } 
+
+        public CarManufacturer(string name)
+        {
+            Name = name;
+            Models = new List<string>();
+        }
+
+        public void AddModel(string model)
+        {
+            Models.Add(model);
+        }
+
+        public override string ToString()
+        {
+            return $"{Name} - Models: {string.Join(", ", Models)}";
+        }
+
+        public List<string> GetModels()
+        {
+            return Models;
+        }
+
+        public void RemoveModel(string model)
+        {
+            Models.Remove(model);
+        }
+
+        public void ClearModels()
+        {
+            Models.Clear();
+        }
+
+        public string GetModelByQuery(string query)
+        {
+            return Models.FirstOrDefault(m => m.Equals(query, StringComparison.OrdinalIgnoreCase));
+        }
+    }
+}

CarManagerV3/Forms/CarDetailsForm.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using CarManagerV3.Util;
 
 namespace CarManagerV3
 {
@@ -29,6 +30,39 @@ namespace CarManagerV3
             {
                 lblID.Text = $"ID: {car.Id}";
             }
+            SetAutoCompleteForMake();
+            SetAutoCompleteForModel();
+            SetAutoCompleteForColor();
+        }
+
+        private void SetAutoCompleteForMake()
+        {
+            var makes = CarCompletions.GetCarBrands();
+            var makeAutoComplete = new AutoCompleteStringCollection();
+            makeAutoComplete.AddRange(makes.ToArray());
+            tbxMake.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
+            tbxMake.AutoCompleteSource = AutoCompleteSource.CustomSource;
+            tbxMake.AutoCompleteCustomSource = makeAutoComplete;
+        }
+
+        private void SetAutoCompleteForModel()
+        {
+            var models = CarCompletions.GetCarModels(tbxMake.Text);
+            var modelAutoComplete = new AutoCompleteStringCollection();
+            modelAutoComplete.AddRange(models.ToArray());
+            tbxModel.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
+            tbxModel.AutoCompleteSource = AutoCompleteSource.CustomSource;
+            tbxModel.AutoCompleteCustomSource = modelAutoComplete;
+        }
+
+        private void SetAutoCompleteForColor()
+        {
+            var colors = CarCompletions.CommonColors;
+            var colorAutoComplete = new AutoCompleteStringCollection();
+            colorAutoComplete.AddRange(colors.ToArray());
+            tbxColor.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
+            tbxColor.AutoCompleteSource = AutoCompleteSource.CustomSource;
+            tbxColor.AutoCompleteCustomSource = colorAutoComplete;
         }
 
         /// <summary>
@@ -69,6 +103,7 @@ namespace CarManagerV3
                 () => car.Make = ValueOrFormer(tbxMake.Text, car.Make),
                 () => tbxMake.Text = car.Make
             );
+            SetAutoCompleteForModel();
         }
 
         private void tbxModel_TextChanged(object sender, EventArgs e)
@@ -163,7 +198,8 @@ namespace CarManagerV3
 
         protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
         {
-            if (keyData == Keys.Enter)
+            // Ctrl+S to save, Esc to close, Delete to delete
+            if (keyData == (Keys.Control | Keys.S))
             {
                 btnSave.PerformClick();
                 return true; // Indicate that the key has been handled

CarManagerV3/Forms/MainForm.cs

@@ -86,6 +86,8 @@ namespace CarManagerV3
                 Console.Error.WriteLine("Error checking for updates: " + ex.Message);
             }
 
+            CarCompletions.UpdateCarCompletionDataAsync();
+
 
         }
 

CarManagerV3/Forms/SettingsForm.Designer.cs

@@ -36,9 +36,15 @@
             btnAccept = new System.Windows.Forms.Button();
             btnDiscard = new System.Windows.Forms.Button();
             tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
+            lblCompletionsRefreshWindow = new System.Windows.Forms.Label();
             lblDataLocation = new System.Windows.Forms.Label();
             tbxDataLocation = new System.Windows.Forms.TextBox();
             cbxPreRelease = new System.Windows.Forms.CheckBox();
+            flowLayoutPanel4 = new System.Windows.Forms.FlowLayoutPanel();
+            nudCompletionIntervalHours = new System.Windows.Forms.NumericUpDown();
+            label3 = new System.Windows.Forms.Label();
+            nudCompletionIntervalMinutes = new System.Windows.Forms.NumericUpDown();
+            label4 = new System.Windows.Forms.Label();
             tableLayoutPanel2 = new System.Windows.Forms.TableLayoutPanel();
             btnReset = new System.Windows.Forms.Button();
             flowLayoutPanel3 = new System.Windows.Forms.FlowLayoutPanel();
@@ -46,6 +52,9 @@
             flowLayoutPanel1.SuspendLayout();
             flowLayoutPanel2.SuspendLayout();
             tableLayoutPanel1.SuspendLayout();
+            flowLayoutPanel4.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)nudCompletionIntervalHours).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)nudCompletionIntervalMinutes).BeginInit();
             tableLayoutPanel2.SuspendLayout();
             flowLayoutPanel3.SuspendLayout();
             SuspendLayout();
@@ -121,27 +130,46 @@
             tableLayoutPanel1.ColumnCount = 2;
             tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
             tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            tableLayoutPanel1.Controls.Add(lblCompletionsRefreshWindow, 0, 2);
             tableLayoutPanel1.Controls.Add(lblDataLocation, 0, 0);
             tableLayoutPanel1.Controls.Add(tbxDataLocation, 1, 0);
-            tableLayoutPanel1.Controls.Add(cbxPreRelease, 1, 1);
+            tableLayoutPanel1.Controls.Add(cbxPreRelease, 0, 1);
+            tableLayoutPanel1.Controls.Add(flowLayoutPanel4, 1, 2);
             tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
             tableLayoutPanel1.Location = new System.Drawing.Point(0, 86);
             tableLayoutPanel1.Name = "tableLayoutPanel1";
             tableLayoutPanel1.Padding = new System.Windows.Forms.Padding(10, 0, 10, 0);
-            tableLayoutPanel1.RowCount = 3;
-            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            tableLayoutPanel1.RowCount = 7;
             tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
             tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 0F));
+            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 20F));
+            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 20F));
+            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 20F));
+            tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 20F));
             tableLayoutPanel1.Size = new System.Drawing.Size(499, 531);
             tableLayoutPanel1.TabIndex = 3;
             // 
+            // lblCompletionsRefreshWindow
+            // 
+            lblCompletionsRefreshWindow.Anchor = System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right;
+            lblCompletionsRefreshWindow.AutoSize = true;
+            lblCompletionsRefreshWindow.Location = new System.Drawing.Point(13, 66);
+            lblCompletionsRefreshWindow.Margin = new System.Windows.Forms.Padding(3);
+            lblCompletionsRefreshWindow.MaximumSize = new System.Drawing.Size(150, 0);
+            lblCompletionsRefreshWindow.Name = "lblCompletionsRefreshWindow";
+            lblCompletionsRefreshWindow.Size = new System.Drawing.Size(148, 1);
+            lblCompletionsRefreshWindow.TabIndex = 4;
+            lblCompletionsRefreshWindow.Text = "Refresh completions after";
+            lblCompletionsRefreshWindow.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+            // 
             // lblDataLocation
             // 
             lblDataLocation.Anchor = System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right;
             lblDataLocation.AutoSize = true;
             lblDataLocation.Location = new System.Drawing.Point(13, 6);
             lblDataLocation.Name = "lblDataLocation";
-            lblDataLocation.Size = new System.Drawing.Size(102, 20);
+            lblDataLocation.Size = new System.Drawing.Size(148, 20);
             lblDataLocation.TabIndex = 0;
             lblDataLocation.Text = "Data Location";
             lblDataLocation.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
@@ -149,9 +177,9 @@
             // tbxDataLocation
             // 
             tbxDataLocation.Dock = System.Windows.Forms.DockStyle.Fill;
-            tbxDataLocation.Location = new System.Drawing.Point(121, 3);
+            tbxDataLocation.Location = new System.Drawing.Point(167, 3);
             tbxDataLocation.Name = "tbxDataLocation";
-            tbxDataLocation.Size = new System.Drawing.Size(365, 27);
+            tbxDataLocation.Size = new System.Drawing.Size(319, 27);
             tbxDataLocation.TabIndex = 1;
             // 
             // cbxPreRelease
@@ -166,6 +194,61 @@
             cbxPreRelease.Text = "Pre-Release channel";
             cbxPreRelease.UseVisualStyleBackColor = true;
             // 
+            // flowLayoutPanel4
+            // 
+            flowLayoutPanel4.AutoSize = true;
+            flowLayoutPanel4.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
+            flowLayoutPanel4.Controls.Add(nudCompletionIntervalHours);
+            flowLayoutPanel4.Controls.Add(label3);
+            flowLayoutPanel4.Controls.Add(nudCompletionIntervalMinutes);
+            flowLayoutPanel4.Controls.Add(label4);
+            flowLayoutPanel4.Dock = System.Windows.Forms.DockStyle.Fill;
+            flowLayoutPanel4.Location = new System.Drawing.Point(164, 66);
+            flowLayoutPanel4.Margin = new System.Windows.Forms.Padding(0, 3, 0, 3);
+            flowLayoutPanel4.Name = "flowLayoutPanel4";
+            flowLayoutPanel4.Size = new System.Drawing.Size(325, 1);
+            flowLayoutPanel4.TabIndex = 5;
+            // 
+            // nudCompletionIntervalHours
+            // 
+            nudCompletionIntervalHours.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
+            nudCompletionIntervalHours.Location = new System.Drawing.Point(3, 3);
+            nudCompletionIntervalHours.Name = "nudCompletionIntervalHours";
+            nudCompletionIntervalHours.Size = new System.Drawing.Size(44, 27);
+            nudCompletionIntervalHours.TabIndex = 0;
+            nudCompletionIntervalHours.UpDownAlign = System.Windows.Forms.LeftRightAlignment.Left;
+            // 
+            // label3
+            // 
+            label3.Anchor = System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom;
+            label3.AutoSize = true;
+            label3.Location = new System.Drawing.Point(53, 0);
+            label3.Name = "label3";
+            label3.Size = new System.Drawing.Size(24, 33);
+            label3.TabIndex = 1;
+            label3.Text = "h :";
+            label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+            // 
+            // nudCompletionIntervalMinutes
+            // 
+            nudCompletionIntervalMinutes.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
+            nudCompletionIntervalMinutes.Location = new System.Drawing.Point(83, 3);
+            nudCompletionIntervalMinutes.Name = "nudCompletionIntervalMinutes";
+            nudCompletionIntervalMinutes.Size = new System.Drawing.Size(44, 27);
+            nudCompletionIntervalMinutes.TabIndex = 2;
+            nudCompletionIntervalMinutes.UpDownAlign = System.Windows.Forms.LeftRightAlignment.Left;
+            // 
+            // label4
+            // 
+            label4.Anchor = System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom;
+            label4.AutoSize = true;
+            label4.Location = new System.Drawing.Point(133, 0);
+            label4.Name = "label4";
+            label4.Size = new System.Drawing.Size(22, 33);
+            label4.TabIndex = 3;
+            label4.Text = "m";
+            label4.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
+            // 
             // tableLayoutPanel2
             // 
             tableLayoutPanel2.AutoSize = true;
@@ -240,6 +323,10 @@
             flowLayoutPanel2.ResumeLayout(false);
             tableLayoutPanel1.ResumeLayout(false);
             tableLayoutPanel1.PerformLayout();
+            flowLayoutPanel4.ResumeLayout(false);
+            flowLayoutPanel4.PerformLayout();
+            ((System.ComponentModel.ISupportInitialize)nudCompletionIntervalHours).EndInit();
+            ((System.ComponentModel.ISupportInitialize)nudCompletionIntervalMinutes).EndInit();
             tableLayoutPanel2.ResumeLayout(false);
             tableLayoutPanel2.PerformLayout();
             flowLayoutPanel3.ResumeLayout(false);
@@ -264,5 +351,11 @@
         private System.Windows.Forms.CheckBox cbxPreRelease;
         private System.Windows.Forms.FlowLayoutPanel flowLayoutPanel3;
         private System.Windows.Forms.Label lblEnv;
+        private System.Windows.Forms.Label lblCompletionsRefreshWindow;
+        private System.Windows.Forms.FlowLayoutPanel flowLayoutPanel4;
+        private System.Windows.Forms.NumericUpDown nudCompletionIntervalHours;
+        private System.Windows.Forms.Label label3;
+        private System.Windows.Forms.NumericUpDown nudCompletionIntervalMinutes;
+        private System.Windows.Forms.Label label4;
     }
 }

CarManagerV3/Forms/SettingsForm.cs

@@ -43,6 +43,9 @@ namespace CarManagerV3.Forms
                     read: () => Properties.Settings.Default.AllowPrerelease,
                     write: v => Properties.Settings.Default.AllowPrerelease = v);
 
+            //TODO: implement refresh settings
+
+
             lblEnv.Text = lblEnv.Text.Replace("%E%", InstallModeDetector.IsInstalledViaMsi() ? "Installed via MSI" : "Running in portable mode");
 
         }
@@ -60,10 +63,33 @@ namespace CarManagerV3.Forms
 
         private void saveSettings()
         {
+            bool requiresRestart = false;
             foreach (var kvp in settingsMap)
+            {
                 kvp.Value.Save();
+                if (kvp.Value.RequiresRestart())
+                    requiresRestart = true;
+            }
+                
 
             Properties.Settings.Default.Save();
+            if(requiresRestart)
+            {
+                DialogResult result = MessageBox.Show(
+                    "Some changes you made require a restart to take effect. Do you want to restart now?",
+                    "Restart Required",
+                    MessageBoxButtons.YesNo,
+                    MessageBoxIcon.Information);
+                if (result == DialogResult.Yes)
+                {
+                    Application.Restart();
+                } else
+                {
+                    MessageBox.Show("Please restart the application as soon as possible to ensure all changes take effect.", "Restart Recommended", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+                }
+            }
+
+            
         }
 
         private void resetSettings()
@@ -106,6 +132,7 @@ namespace CarManagerV3.Forms
         void Load();
         void Save();
         void Reset();
+        bool RequiresRestart();
     }
 
     internal sealed class SettingBinding<T> : ISettingBinding
@@ -115,14 +142,18 @@ namespace CarManagerV3.Forms
         private readonly Func<T> read;
         private readonly Action<T> write;
         private readonly Action<T, T>? onChange;
+        private readonly bool requiresRestart;
+        private bool changeRequiresRestart;
 
-        public SettingBinding(Control control, T defaultValue, Func<T> read, Action<T> write, Action<T, T>? onChange = null)
+        public SettingBinding(Control control, T defaultValue, Func<T> read, Action<T> write, bool requiresRestart = false, Action<T, T>? onChange = null)
         {
             this.control = control;
             this.defaultValue = defaultValue;
             this.read = read;
             this.write = write;
             this.onChange = onChange;
+            this.requiresRestart = requiresRestart;
+            this.changeRequiresRestart = false;
         }
 
         public void Load()
@@ -140,10 +171,15 @@ namespace CarManagerV3.Forms
 
             if (onChange != null && !EqualityComparer<T>.Default.Equals(before, after))
                 onChange(before, after);
+
+            if (requiresRestart && !EqualityComparer<T>.Default.Equals(before, after))
+                changeRequiresRestart = true;
         }
 
         public void Reset() => write(defaultValue);
 
+        public bool RequiresRestart() => changeRequiresRestart;
+
         private void ApplyToControl(T value)
         {
             switch (control)

CarManagerV3/Manager/SafeManager.cs

@@ -64,6 +64,26 @@ namespace CarManagerV3
             }
         }
 
+        /// <summary>
+        /// Ensures the directory exists.
+        /// </summary>
+        /// <param name="path">The path.</param>
+        public static void EnsureDirectoryExists(string path)
+        {
+            try
+            {
+                string directory = Path.GetDirectoryName(path);
+                if (directory != null && !Directory.Exists(directory))
+                {
+                    Directory.CreateDirectory(directory);
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.Error.WriteLine($"Error ensuring directory exists: {ex.Message}");
+            }
+        }
+
         /// <summary>
         /// Reads cars from a specified file path.
         /// </summary>

CarManagerV3/Properties/Resources.resx

@@ -118,6 +118,9 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="CarCompleteData" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\merged-cars.json;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
   <data name="Icon_Add" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\Icon_Add.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>

CarManagerV3/Properties/Settings.Designer.cs

@@ -46,5 +46,29 @@ namespace CarManagerV3.Properties {
                 this["AllowPrerelease"] = value;
             }
         }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("2026-01-01")]
+        public global::System.DateTime LastFetchedAutoCompletions {
+            get {
+                return ((global::System.DateTime)(this["LastFetchedAutoCompletions"]));
+            }
+            set {
+                this["LastFetchedAutoCompletions"] = value;
+            }
+        }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("24.00:00:00")]
+        public global::System.TimeSpan FetchAutoCompletionsInterval {
+            get {
+                return ((global::System.TimeSpan)(this["FetchAutoCompletionsInterval"]));
+            }
+            set {
+                this["FetchAutoCompletionsInterval"] = value;
+            }
+        }
     }
 }

CarManagerV3/Properties/Settings.settings

@@ -8,5 +8,11 @@
     <Setting Name="AllowPrerelease" Type="System.Boolean" Scope="User">
       <Value Profile="(Default)">False</Value>
     </Setting>
+    <Setting Name="LastFetchedAutoCompletions" Type="System.DateTime" Scope="User">
+      <Value Profile="(Default)">2026-01-01</Value>
+    </Setting>
+    <Setting Name="FetchAutoCompletionsInterval" Type="System.TimeSpan" Scope="User">
+      <Value Profile="(Default)">24.00:00:00</Value>
+    </Setting>
   </Settings>
 </SettingsFile>

CarManagerV3/Util/CarCompletions.cs

@@ -0,0 +1,261 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using CarManagerV3.Classes;
+
+namespace CarManagerV3.Util
+{
+    /// <summary>
+    /// Provides car manufacturer and model autocompletion data for the application.
+    /// Manages fetching, caching, and retrieval of car brand and model information from remote sources and local storage.
+    /// </summary>
+    /// <remarks>
+    /// This class maintains a static list of car manufacturers and their models, supports fetching updated data from remote URLs,
+    /// and caches the data locally for offline use. It implements retry logic to prevent excessive network requests.
+    /// </remarks>
+    internal class CarCompletions
+    {
+        /// <summary>
+        /// A list of URLs that should be used to fetch the json file with autocompletion data.
+        /// Multiple URLs are provided to ensure that if one source is unavailable, the others can be used as a fallback. The application should attempt to fetch the data from each URL in order until it successfully retrieves the data or exhausts all options.
+        /// </summary>
+        private static readonly string[] carDataFileUrls =
+        {
+            "https://static.clsw.app/carmgm/merged-cars.json"
+        };
+
+        /// <summary>
+        /// The filename for the cached car completion data in the user's data directory.
+        /// </summary>
+        private static readonly string carCompletionDataFileName = "car_data.json";
+
+        /// <summary>
+        /// The timestamp of the last fetch attempt for car completion data.
+        /// Used to implement retry throttling to prevent excessive network requests.
+        /// </summary>
+        private static DateTime lastFetchAttempt = Properties.Settings.Default.LastFetchedAutoCompletions;
+
+        /// <summary>
+        /// The minimum time interval that must elapse between fetch attempts.
+        /// Prevents excessive retry attempts when the remote source is unavailable.
+        /// </summary>
+        private static readonly TimeSpan fetchRetryInterval = Properties.Settings.Default.FetchAutoCompletionsInterval; // Minimum interval between fetch attempts
+
+        /// <summary>
+        /// Gets the full file path for the car completion data file.
+        /// Ensures that the user data directory exists before returning the path.
+        /// </summary>
+        /// <returns>The full file path to the car completion data file in the user's data directory.</returns>
+        private static string getCarCompletionDataFilePath()
+        {
+            var userDataDir = Properties.Settings.Default.DataLocation;
+            SafeManager.EnsureDirectoryExists(userDataDir);
+            return Path.Combine(userDataDir, carCompletionDataFileName);
+        }
+
+        /// <summary>
+        /// The static list of car manufacturers and their available models.
+        /// This list serves as the default data and is updated when fetching from remote sources or local cache.
+        /// </summary>
+        public static List<CarManufacturer> carBrands = new List<CarManufacturer>
+        {
+            new CarManufacturer("Toyota") { Models = new List<string> { "Camry", "Corolla", "RAV4" } },
+            new CarManufacturer("Honda") { Models = new List<string> { "Civic", "Accord", "CR-V" } },
+            new CarManufacturer("Ford") { Models = new List<string> { "F-150", "Mustang", "Escape" } },
+            new CarManufacturer("Chevrolet") { Models = new List<string> { "Silverado", "Malibu", "Equinox" } },
+            new CarManufacturer("BMW") { Models = new List<string> { "3 Series", "5 Series", "X5" } },
+            new CarManufacturer("Mercedes-Benz") { Models = new List<string> { "C-Class", "E-Class", "GLC" } },
+            new CarManufacturer("Audi") { Models = new List<string> { "A4", "A6", "Q5" } },
+            new CarManufacturer("Volkswagen") { Models = new List<string> { "Golf", "Passat", "Tiguan" } },
+            new CarManufacturer("Nissan") { Models = new List<string> { "Altima", "Sentra", "Rogue" } },
+            new CarManufacturer("Hyundai") { Models = new List<string> { "Elantra", "Sonata", "Tucson" } },
+            new CarManufacturer("SEAT") { Models = new List<string> { "Ibiza", "Leon", "Ateca", "Alhambra" } },
+            new CarManufacturer("Skoda") { Models = new List<string> { "Octavia", "Fabia", "Kodiaq" } },
+        };
+
+        /// <summary>
+        /// Gets the full list of car brands.
+        /// </summary>
+        /// <returns>A list of strings containing all available car manufacturer names.</returns>
+        public static List<string> GetCarBrands()
+        {
+            return carBrands.Select(c => c.Name).ToList();
+        }
+
+        /// <summary>
+        /// Retrieves the list of car models for a specified brand.
+        /// The search is case-insensitive.
+        /// </summary>
+        /// <param name="brand">The name of the car brand to search for.</param>
+        /// <returns>A list of car models for the specified brand, or an empty list if the brand is not found.</returns>
+        public static List<string> GetCarModels(string brand)
+        {
+            var manufacturer = carBrands.FirstOrDefault(c => c.Name.Equals(brand, StringComparison.OrdinalIgnoreCase));
+            return manufacturer != null ? manufacturer.Models : new List<string>();
+        }
+
+        /// <summary>
+        /// A predefined list of common car colors for autocompletion purposes.
+        /// Provides standard color options that are frequently used in vehicle descriptions.
+        /// </summary>
+        public static List<string> CommonColors = new List<string>
+        {
+            "Black", "White", "Gray", "Silver", "Red", "Blue", "Green", "Yellow", "Brown", "Orange"
+        };
+
+        /// <summary>
+        /// Reads car completion data from an embedded resource file.
+        /// This method is intended to populate the carBrands list from a JSON resource embedded in the project.
+        /// </summary>
+        /// <remarks>
+        /// The expected resource format is a JSON object where keys are car brand names and values are lists of model names.
+        /// Resource name: CarCompleteData (JSON file format).
+        /// Currently not implemented.
+        /// </remarks>
+        public static void ReadFromResourceFile()
+        {
+            // Read the json file from the projects resources and populate the carBrands list
+            // Format is a json object with the key being the car brand and the value being a list of models
+
+            // Get the json string from the resources, Resource name is CarCompleteData, it is a .json file
+
+
+        }
+
+        /// <summary>
+        /// Fetches the car data from urls asynchronous and saves it in the users data directory for offline use.
+        /// </summary>
+        /// <returns>A task representing the asynchronous operation.</returns>
+        /// <remarks>
+        /// This method implements retry throttling using the <see cref="fetchRetryInterval"/> to prevent excessive network requests.
+        /// It attempts to fetch data from each URL in <see cref="carDataFileUrls"/> in order until successful or all URLs are exhausted.
+        /// The fetched data is saved to the local file system for offline access.
+        /// </remarks>
+        public static async Task FetchCarCompletionDataFromUrlsAsync()
+        {
+            if(DateTime.Now - lastFetchAttempt < fetchRetryInterval)
+            {
+                System.Diagnostics.Debug.WriteLine("Fetch attempt skipped to avoid excessive retries. Last attempt was at " + lastFetchAttempt);
+                Console.WriteLine("Fetch attempt skipped to avoid excessive retries. Last attempt was at " + lastFetchAttempt);
+                return;
+            }
+            foreach (var url in carDataFileUrls)
+            {
+                try
+                {
+                    lastFetchAttempt = DateTime.Now;
+                    Properties.Settings.Default.LastFetchedAutoCompletions = lastFetchAttempt;
+                    Properties.Settings.Default.Save();
+                    using var httpClient = new HttpClient();
+                    var response = await httpClient.GetAsync(url);
+                    response.EnsureSuccessStatusCode();
+                    var jsonData = await response.Content.ReadAsStringAsync();
+                    // Saves the json data to a file in the user's data directory for offline use
+                    var filePath = getCarCompletionDataFilePath();
+                    await File.WriteAllTextAsync(filePath, jsonData);
+                    System.Diagnostics.Debug.WriteLine($"Successfully fetched car data from {url} and saved to {filePath}");
+                    break; // Exit the loop if data is successfully fetched
+                }
+                catch (Exception ex)
+                {
+                    // Log the error and try the next URL
+                    System.Diagnostics.Debug.WriteLine($"Failed to fetch car data from {url}: {ex.Message}");
+                    Console.WriteLine($"Failed to fetch car data from {url}: {ex.Message}");
+                }
+            }
+        }
+
+        /// <summary>
+        /// Fetches the car data from urls and saves it in the users data directory for offline use.
+        /// This is a synchronous wrapper that blocks until the asynchronous fetch operation completes.
+        /// </summary>
+        /// <returns>A task representing the synchronous operation.</returns>
+        /// <remarks>
+        /// This method wraps <see cref="FetchCarCompletionDataFromUrlsAsync"/> and runs it synchronously.
+        /// Consider using the async version directly when possible to avoid blocking the thread.
+        /// </remarks>
+        public static Task FetchCarCompletionDataFromUrls()
+        {
+            // Run synchronously
+            return Task.Run(() => FetchCarCompletionDataFromUrlsAsync().Wait());
+        }
+
+        /// <summary>
+        /// Loads car manufacturer data from the locally cached file.
+        /// Optionally fetches updated data from remote sources before loading from file.
+        /// </summary>
+        /// <param name="skipOnlineUpdate">If true, skips fetching data from remote sources and only reads from the local cache. Default is false.</param>
+        /// <returns>A list of <see cref="CarManufacturer"/> objects populated from the cached file, or an empty list if the file doesn't exist or an error occurs.</returns>
+        /// <remarks>
+        /// The expected file format is a JSON object where keys are car brand names and values are lists of model names.
+        /// If the file doesn't exist or cannot be read, an error message is logged and an empty list is returned.
+        /// </remarks>          
+        public static List<CarManufacturer> GetFromFile(bool skipOnlineUpdate = false)
+        {
+            if (!skipOnlineUpdate) FetchCarCompletionDataFromUrls();
+            var filePath = getCarCompletionDataFilePath();
+            if (File.Exists(filePath))
+            {
+                try
+                {
+                    var jsonData = File.ReadAllText(filePath);
+                    // Parse the json data and populate the carBrands list
+                    // Format is a json object with the key being the car brand and the value being a list of models
+                    var carData = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, List<string>>>(jsonData);
+                    List<CarManufacturer> _carBrands = carData.Select(kvp => new CarManufacturer(kvp.Key) { Models = kvp.Value }).ToList();
+                    return _carBrands;
+                }
+                catch (Exception ex)
+                {
+                    // Silent error.
+                    Console.WriteLine($"Failed to read car data from file: {ex.Message}");
+                }
+            }
+            else
+            {
+                Console.Error.WriteLine("Car data file not found. Please ensure that the data has been fetched successfully at least once.");
+            }
+            return new List<CarManufacturer>();
+        }
+
+        /// <summary>
+        /// Updates the static <see cref="carBrands"/> list with data from the local cache file.
+        /// Only updates the list if the cached file contains valid data.
+        /// </summary>
+        /// <param name="skipOnlineUpdate">If true, skips fetching data from remote sources before updating. Default is false.</param>
+        /// <remarks>
+        /// This method calls <see cref="GetFromFile"/> and updates <see cref="carBrands"/> only if the returned list is not empty.
+        /// If no data is retrieved, the existing <see cref="carBrands"/> list remains unchanged.
+        /// </remarks>
+        public static void UpdateCarCompletionData(bool skipOnlineUpdate = false)
+        {
+            var updatedCarBrands = GetFromFile(skipOnlineUpdate);
+            if (updatedCarBrands.Count > 0)
+            {
+                carBrands = updatedCarBrands;
+            }
+        }
+
+        /// <summary>
+        /// Asynchronously updates the car completion data by fetching from remote sources and updating the local cache.
+        /// This is the recommended method for refreshing car data in the application.
+        /// </summary>
+        /// <returns>A task representing the asynchronous update operation.</returns>
+        /// <remarks>
+        /// This method first attempts to fetch updated data from remote URLs using <see cref="FetchCarCompletionDataFromUrlsAsync"/>,
+        /// then updates the static <see cref="carBrands"/> list from the local cache using <see cref="UpdateCarCompletionData"/>.
+        /// </remarks>
+        public static async Task UpdateCarCompletionDataAsync()
+        {
+            await FetchCarCompletionDataFromUrlsAsync();
+            System.Diagnostics.Debug.WriteLine("Car completion data fetch attempt completed. Now updating local data.");
+            UpdateCarCompletionData(true);
+        }
+    }
+
+}