Extract shared configuration helpers into Infrastructure.Configuration library (#248)

web/backend/Infrastructure/Infrastructure.Configuration/ConfigurationHelpers.cs

@@ -0,0 +1,32 @@
+using Microsoft.Extensions.Configuration;
+
+namespace Infrastructure.Configuration;
+
+public static class ConfigurationHelpers
+{
+    public static string GetKeyOrThrow(IConfiguration configuration, string key) =>
+        configuration[key]
+        ?? throw new InvalidOperationException($"The {key} environment variable is not set.");
+
+    public static bool GetBooleanKeyOrThrow(IConfiguration configuration, string key)
+    {
+        string value = GetKeyOrThrow(configuration, key);
+
+        return bool.TryParse(value, out bool result)
+            ? result
+            : throw new InvalidOperationException(
+                $"The {key} environment variable is set to '{value}', which is not a valid boolean."
+            );
+    }
+
+    public static int GetIntKeyOrThrow(IConfiguration configuration, string key)
+    {
+        string value = GetKeyOrThrow(configuration, key);
+
+        return int.TryParse(value, out int result)
+            ? result
+            : throw new InvalidOperationException(
+                $"The {key} environment variable is set to '{value}', which is not a valid integer."
+            );
+    }
+}

web/backend/Infrastructure/Infrastructure.Configuration/ConfigurationKeys.cs

@@ -0,0 +1,33 @@
+namespace Infrastructure.Configuration;
+
+public static class ConfigurationKeys
+{
+    public const string AccessTokenSecret = "ACCESS_TOKEN_SECRET";
+    public const string RefreshTokenSecret = "REFRESH_TOKEN_SECRET";
+    public const string ConfirmationTokenSecret = "CONFIRMATION_TOKEN_SECRET";
+
+    /// <summary>
+    ///     Fallback configuration section path for the access-token signing key, checked when
+    ///     <see cref="AccessTokenSecret" /> is not set.
+    /// </summary>
+    public const string JwtSecretKeyFallback = "Jwt:SecretKey";
+
+    public const string WebsiteBaseUrl = "WEBSITE_BASE_URL";
+
+    public const string SmtpHost = "SMTP_HOST";
+    public const string SmtpPort = "SMTP_PORT";
+    public const string SmtpUsername = "SMTP_USERNAME";
+    public const string SmtpPassword = "SMTP_PASSWORD";
+    public const string SmtpUseSsl = "SMTP_USE_SSL";
+    public const string SmtpFromEmail = "SMTP_FROM_EMAIL";
+    public const string SmtpFromName = "SMTP_FROM_NAME";
+
+    public const string DbServer = "DB_SERVER";
+    public const string DbUser = "DB_USER";
+    public const string DbPassword = "DB_PASSWORD";
+    public const string DbName = "DB_NAME";
+    public const string DbConnectionString = "DB_CONNECTION_STRING";
+    public const string DbTrustServerCertificate = "DB_TRUST_SERVER_CERTIFICATE";
+
+    public const string ClearDatabase = "CLEAR_DATABASE";
+}

web/backend/Infrastructure/Infrastructure.Configuration/Infrastructure.Configuration.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <TargetFramework>net10.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <RootNamespace>Infrastructure.Configuration</RootNamespace>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference
+            Include="Microsoft.Extensions.Configuration.Abstractions"
+            Version="10.0.1"
+        />
+    </ItemGroup>
+</Project>