Revert "Merge pull request #600 from Azure/rossgrambo/allocation_id"

This reverts commit 51d4ad7, reversing
changes made to d551536.

Author: amerjusupovic

src/Microsoft.Extensions.Configuration.AzureAppConfiguration/Extensions/StringExtensions.cs

@@ -39,12 +39,5 @@ public static string NormalizeNull(this string s)
         {
             return s == LabelFilter.Null ? null : s;
         }
-
-        public static string ToBase64String(this string s)
-        {
-            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(s);
-
-            return Convert.ToBase64String(bytes);
-        }
     }
 }

src/Microsoft.Extensions.Configuration.AzureAppConfiguration/FeatureManagement/FeatureManagementConstants.cs

@@ -43,7 +43,6 @@ internal class FeatureManagementConstants
         public const string ETag = "ETag";
         public const string FeatureFlagId = "FeatureFlagId";
         public const string FeatureFlagReference = "FeatureFlagReference";
-        public const string AllocationId = "AllocationId";
 
         // Dotnet schema keys
         public const string DotnetSchemaSectionName = "FeatureManagement";

src/Microsoft.Extensions.Configuration.AzureAppConfiguration/FeatureManagement/FeatureManagementKeyValueAdapter.cs

@@ -5,7 +5,6 @@
 using Microsoft.Extensions.Configuration.AzureAppConfiguration.Extensions;
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using System.Net.Mime;
 using System.Security.Cryptography;
@@ -324,98 +323,12 @@ private List<KeyValuePair<string, string>> ProcessMicrosoftSchemaFeatureFlag(Fea
                     keyValues.Add(new KeyValuePair<string, string>($"{telemetryPath}:{FeatureManagementConstants.Metadata}:{FeatureManagementConstants.ETag}", setting.ETag.ToString()));
 
                     keyValues.Add(new KeyValuePair<string, string>($"{telemetryPath}:{FeatureManagementConstants.Enabled}", telemetry.Enabled.ToString()));
-
-                    if (featureFlag.Allocation != null)
-                    {
-                        string allocationId = CalculateAllocationId(featureFlag);
-
-                        if (allocationId != null)
-                        {
-                            keyValues.Add(new KeyValuePair<string, string>($"{telemetryPath}:{FeatureManagementConstants.Metadata}:{FeatureManagementConstants.AllocationId}", allocationId));
-                        }
-                    }
                 }
             }
 
             return keyValues;
         }
 
-        private string CalculateAllocationId(FeatureFlag flag)
-        {
-            Debug.Assert(flag.Allocation != null);
-
-            StringBuilder inputBuilder = new StringBuilder();
-
-            // Seed
-            inputBuilder.Append($"seed={flag.Allocation.Seed ?? string.Empty}");
-
-            var allocatedVariants = new HashSet<string>();
-
-            // DefaultWhenEnabled
-            if (flag.Allocation.DefaultWhenEnabled != null)
-            {
-                allocatedVariants.Add(flag.Allocation.DefaultWhenEnabled);
-            }
-
-            inputBuilder.Append($"\ndefault_when_enabled={flag.Allocation.DefaultWhenEnabled ?? string.Empty}");
-
-            // Percentiles
-            inputBuilder.Append("\npercentiles=");
-
-            if (flag.Allocation.Percentile != null && flag.Allocation.Percentile.Any())
-            {
-                IEnumerable<FeaturePercentileAllocation> sortedPercentiles = flag.Allocation.Percentile
-                    .Where(p => p.From != p.To)
-                    .OrderBy(p => p.From)
-                    .ToList();
-
-                allocatedVariants.UnionWith(sortedPercentiles.Select(p => p.Variant));
-
-                inputBuilder.Append(string.Join(";", sortedPercentiles.Select(p => $"{p.From},{p.Variant.ToBase64String()},{p.To}")));
-            }
-
-            // If there's no custom seed and no variants allocated, stop now and return null
-            if (flag.Allocation.Seed == null &&
-                !allocatedVariants.Any())
-            {
-                return null;
-            }
-
-            // Variants
-            inputBuilder.Append("\nvariants=");
-
-            if (allocatedVariants.Any() && flag.Variants != null && flag.Variants.Any())
-            {
-                IEnumerable<FeatureVariant> sortedVariants = flag.Variants
-                    .Where(variant => allocatedVariants.Contains(variant.Name))
-                    .OrderBy(variant => variant.Name)
-                    .ToList();
-
-                inputBuilder.Append(string.Join(";", sortedVariants.Select(v =>
-                {
-                    var variantValue = string.Empty;
-
-                    if (v.ConfigurationValue.ValueKind != JsonValueKind.Null && v.ConfigurationValue.ValueKind != JsonValueKind.Undefined)
-                    {
-                        variantValue = v.ConfigurationValue.SerializeWithSortedKeys();
-                    }
-
-                    return $"{v.Name.ToBase64String()},{(variantValue)}";
-                })));
-            }
-
-            // Example input string
-            // input == "seed=123abc\ndefault_when_enabled=Control\npercentiles=0,Blshdk,20;20,Test,100\nvariants=TdLa,standard;Qfcd,special"
-            string input = inputBuilder.ToString();
-
-            using (SHA256 sha256 = SHA256.Create())
-            {
-                byte[] truncatedHash = new byte[15];
-                Array.Copy(sha256.ComputeHash(Encoding.UTF8.GetBytes(input)), truncatedHash, 15);
-                return truncatedHash.ToBase64Url();
-            }
-        }
-
         private FormatException CreateFeatureFlagFormatException(string jsonPropertyName, string settingKey, string foundJsonValueKind, string expectedJsonValueKind)
         {
             return new FormatException(string.Format(