From 055d09d77a3f16f9e5feec070edca1dda8c1207f Mon Sep 17 00:00:00 2001
From: Michael Green <84688932+michael-j-green@users.noreply.github.com>
Date: Wed, 1 Mar 2023 10:22:19 +1100
Subject: [PATCH] feat: Added config file class to keep track of local settings
 such as database connectivity

---
 gaseous-signature-ingestor/Program.cs |  11 +--
 gaseous-tools/Config.cs               | 112 ++++++++++++++++++++++++++
 gaseous-tools/gaseous-tools.csproj    |   1 +
 3 files changed, 117 insertions(+), 7 deletions(-)
 create mode 100644 gaseous-tools/Config.cs

diff --git a/gaseous-signature-ingestor/Program.cs b/gaseous-signature-ingestor/Program.cs
index 60a09da..878bfb9 100644
--- a/gaseous-signature-ingestor/Program.cs
+++ b/gaseous-signature-ingestor/Program.cs
@@ -6,8 +6,6 @@ using gaseous_signature_parser.parsers;
 using gaseous_tools;
 using MySqlX.XDevAPI;
 
-string configPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".gaseous-server");
-
 // process command line
 string[] commandLineArgs = Environment.GetCommandLineArgs();
 
@@ -47,15 +45,14 @@ foreach (string commandLineArg in commandLineArgs)
     }
 }
 
-// check if configPath is valid and create it if not
-if (!Directory.Exists(configPath))
+// check if Config.ConfigurationPath is valid and create it if not
+if (!Directory.Exists(Config.ConfigurationPath))
 {
-    Directory.CreateDirectory(configPath);
+    Directory.CreateDirectory(Config.ConfigurationPath);
 }
 
 // connect to database
-string cs = @"server=localhost;userid=gaseous;password=gaseous;database=gaseous";
-Database db = new gaseous_tools.Database(Database.databaseType.MySql, cs);
+Database db = new gaseous_tools.Database(Database.databaseType.MySql, Config.DatabaseConfiguration.ConnectionString);
 
 // process provided files
 Console.WriteLine("Processing input files:");
diff --git a/gaseous-tools/Config.cs b/gaseous-tools/Config.cs
new file mode 100644
index 0000000..c9e8e4e
--- /dev/null
+++ b/gaseous-tools/Config.cs
@@ -0,0 +1,112 @@
+using System;
+using Newtonsoft.Json;
+
+namespace gaseous_tools
+{
+    public static class Config
+    {
+        static ConfigFile _config;
+
+        public static string ConfigurationPath
+        {
+            get
+            {
+                return Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".gaseous-server");
+            }
+        }
+
+        static string ConfigurationFilePath
+        {
+            get
+            {
+                return Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".gaseous-server", "config.json");
+            }
+        }
+
+        static string ConfigurationFilePath_Backup
+        {
+            get
+            {
+                return Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".gaseous-server", "config.json.backup");
+            }
+        }
+
+        public static ConfigFile.Database DatabaseConfiguration
+        {
+            get
+            {
+                return _config.DatabaseConfiguration;
+            }
+        }
+
+        static Config()
+        {
+            if (_config == null)
+            {
+                // load the config file
+                if (File.Exists(ConfigurationFilePath))
+                {
+                    string configRaw = File.ReadAllText(ConfigurationFilePath);
+                    ConfigFile? _tempConfig = Newtonsoft.Json.JsonConvert.DeserializeObject<ConfigFile>(configRaw);
+                    if (_tempConfig != null)
+                    {
+                        _config = _tempConfig;
+                    } else
+                    {
+                        throw new Exception("There was an error reading the config file: Json returned null");
+                    }
+                } else
+                {
+                    // no config file!
+                    // use defaults and save
+                    _config = new ConfigFile();
+                    string configRaw = Newtonsoft.Json.JsonConvert.SerializeObject(_config, Newtonsoft.Json.Formatting.Indented);
+                    File.WriteAllText(ConfigurationFilePath, configRaw);
+                }
+            }
+
+            Console.WriteLine("Using configuration:");
+            Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(_config, Formatting.Indented));
+        }
+
+        public static void UpdateConfig()
+        {
+            // save any updates to the configuration
+            string configRaw = Newtonsoft.Json.JsonConvert.SerializeObject(_config, Newtonsoft.Json.Formatting.Indented);
+            if (File.Exists(ConfigurationFilePath_Backup))
+            {
+                File.Delete(ConfigurationFilePath_Backup);
+            }
+            if (File.Exists(ConfigurationFilePath))
+            {
+                File.Move(ConfigurationFilePath, ConfigurationFilePath_Backup);
+            }
+            File.WriteAllText(ConfigurationFilePath, configRaw);
+        }
+
+        public class ConfigFile
+        {
+            public Database DatabaseConfiguration = new Database();
+
+            public class Database
+            {
+                public string HostName = "localhost";
+                public string UserName = "gaseous";
+                public string Password = "gaseous";
+                public string DatabaseName = "gaseous";
+                public int Port = 3306;
+
+                [JsonIgnore]
+                public string ConnectionString
+                {
+                    get
+                    {
+                        string dbConnString = "server=" + HostName + ";port=" + Port + ";userid=" + UserName + ";password=" + Password + ";database=" + DatabaseName + "";
+                        return dbConnString;
+                    }
+                }
+            }
+        }
+    }
+}
+
diff --git a/gaseous-tools/gaseous-tools.csproj b/gaseous-tools/gaseous-tools.csproj
index bf015c7..5420952 100644
--- a/gaseous-tools/gaseous-tools.csproj
+++ b/gaseous-tools/gaseous-tools.csproj
@@ -9,6 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="MySql.Data" Version="8.0.32" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
   <ItemGroup>
     <None Remove="Database\" />