MD5 hashing for localization strings

Author: DonMartin76

src/Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <Version>4.0.11</Version>
+        <Version>4.0.12</Version>
         <Authors>Martin Danielsson</Authors>
         <Company>Haufe-Lexware GmbH &amp; Co. KG</Company>
         <Description>Extensible, simple and fast ETL Tool</Description>

src/NoFrillsTransformation.Plugins.Acumatica/Operators/AcumaticaLocalizationMd5HashOperator copy.cs

@@ -0,0 +1,93 @@
+// Implements an IOperator which takes one single string,
+// supposedly a date string such as "2022-06-02T09:25:36.0830000", and strips
+// off the zeroes at then end of the string. It also replaces the "T" with a space.
+// If there are more than three decimals which are non zero, truncate to three.
+
+using System;
+using System.Composition;
+using System.Text;
+using System.Text.RegularExpressions;
+using NoFrillsTransformation.Interfaces;
+
+namespace NoFrillsTransformation.Plugins.Acumatica.Operators
+{
+    [Export(typeof(IOperator))]
+    public class AcumaticaLocalizationMd5HashOperator : IOperator
+    {
+        public string Name => "aculocalizationmd5hash";
+
+        public string Description => "Creates an MD5 hash string from the input string, according to Localization.";
+
+        public ExpressionType Type => ExpressionType.Custom;
+
+        public int ParamCount => 1;
+
+        public ParamType[]? ParamTypes => new ParamType[] { ParamType.String };
+
+        public ParamType ReturnType => ParamType.String;
+
+        public void Configure(string? config)
+        {
+        }
+
+        public string Evaluate(IEvaluator eval, IExpression expression, IContext context)
+        {
+            string parameter = eval.Evaluate(eval, expression.Arguments[0], context);
+            return CalculateMD5LocalizationString(parameter);
+        }
+
+        private static string GetMD5Hash(string input)
+        {
+            // step 1, calculate MD5 hash from input
+            var md5 = System.Security.Cryptography.MD5.Create();
+            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
+            byte[] hash = md5.ComputeHash(inputBytes);
+
+            // step 2, convert byte array to hex string
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < hash.Length; i++)
+            {
+                sb.Append(hash[i].ToString("X2"));
+            }
+
+            return sb.ToString();
+        }
+
+        internal static Byte[] CalculateMD5(String str)
+        {
+            if (str == null) return new Byte[0];
+
+            using var prov = System.Security.Cryptography.MD5.Create();
+            byte[] bs = prov.ComputeHash(System.Text.Encoding.Unicode.GetBytes(str));
+
+            return bs;
+        }
+        internal static String CalculateMD5String(String str)
+        {
+            return ConvertBytes(CalculateMD5(str));
+        }
+        internal static String CalculateMD5LocalizationString(String str)
+        {
+            return CalculateMD5String(str.ToLower());
+        }
+
+        internal static String ConvertBytes(Byte[] bytes)
+        {
+            return ConvertBytes(bytes, 0);
+        }
+        /// <remarks>Will insert a separator (<c>-</c>) every <paramref name="chars"/> characters</remarks>
+        internal static String ConvertBytes(Byte[] bytes, Int32 chars)
+        {
+            if (bytes == null) return "";
+
+            StringBuilder s = new StringBuilder();
+            for (int i = 0; i < bytes.Length; i++)
+            {
+                if (i > 0 && chars > 0 && i % chars == 0) s.Append("-");
+
+                s.Append(bytes[i].ToString("X2"));
+            }
+            return s.ToString();
+        }
+    }
+}

src/NoFrillsTransformation.Plugins.Acumatica/Operators/AcumaticaMd5HashOperator.cs

@@ -0,0 +1,56 @@
+// Implements an IOperator which takes one single string,
+// supposedly a date string such as "2022-06-02T09:25:36.0830000", and strips
+// off the zeroes at then end of the string. It also replaces the "T" with a space.
+// If there are more than three decimals which are non zero, truncate to three.
+
+using System;
+using System.Composition;
+using System.Text;
+using System.Text.RegularExpressions;
+using NoFrillsTransformation.Interfaces;
+
+namespace NoFrillsTransformation.Plugins.Acumatica.Operators
+{
+    [Export(typeof(IOperator))]
+    public class AcumaticaMd5HashOperator : IOperator
+    {
+        public string Name => "acumd5hash";
+
+        public string Description => "Creates an MD5 hash string from the input string.";
+
+        public ExpressionType Type => ExpressionType.Custom;
+
+        public int ParamCount => 1;
+
+        public ParamType[]? ParamTypes => new ParamType[] { ParamType.String };
+
+        public ParamType ReturnType => ParamType.String;
+
+        public void Configure(string? config)
+        {
+        }
+
+        public string Evaluate(IEvaluator eval, IExpression expression, IContext context)
+        {
+            string parameter = eval.Evaluate(eval, expression.Arguments[0], context);
+            return GetMD5Hash(parameter);
+        }
+
+        private static string GetMD5Hash(string input)
+        {
+            // step 1, calculate MD5 hash from input
+            var md5 = System.Security.Cryptography.MD5.Create();
+            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
+            byte[] hash = md5.ComputeHash(inputBytes);
+
+            // step 2, convert byte array to hex string
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < hash.Length; i++)
+            {
+                sb.Append(hash[i].ToString("X2"));
+            }
+
+            return sb.ToString();
+        }
+   }
+}

src/NoFrillsTransformation.Plugins.Sql/SqlWriter.cs

@@ -42,6 +42,13 @@ public SqlWriter(IContext context, string target, string[] fieldNames, int[] fie
                 throw new ArgumentException("Table name not found in SQL entity configuration file: " + _config);
             }
             _tableName = _entityConfig.Table.Name;
+
+            // If there is a parameter sqltimestamp in the context, and it's set to true, write a timestamp comment
+            if (context.Parameters.TryGetValue("sqltimestamp", out string? sqltimestamp) && sqltimestamp.ToLowerInvariant() == "true")
+            {
+                _textWriter.WriteLine("-- Generated by NoFrillsTransformation at " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
+            }
+
             _textWriter.WriteLine($"DROP TABLE IF EXISTS {_tableName};");
             _textWriter.WriteLine("CREATE TABLE " + _tableName + " (");
             // Copy the column names from the config file