Create Organization entity.

eventhub/src/EventHub.Domain.Shared/Organizations/OrganizationContst.cs

@@ -0,0 +1,8 @@
+namespace EventHub.Organizations
+{
+    public static class OrganizationConsts
+    {
+        public const int MinNameLength = 2;
+        public const int MaxNameLength = 32;
+    }
+}

eventhub/src/EventHub.Domain/Organizations/Organization.cs

@@ -0,0 +1,52 @@
+using System;
+using Volo.Abp;
+using Volo.Abp.Domain.Entities;
+
+namespace EventHub.Organizations
+{
+    public class Organization : AggregateRoot<Guid>
+    {
+        public string Name { get; private set; }
+
+        public string DisplayName { get; set; }
+
+        public string Description { get; set; }
+
+        public string Website { get; set; }
+
+        public string TwitterUsername { get; set; }
+
+        public string GitHubUsername { get; set; }
+
+        public string FacebookUsername { get; set; }
+
+        public string InstagramUsername { get; set; }
+
+        public string MediumUsername { get; set; }
+
+        private Organization()
+        {
+
+        }
+
+        public Organization(
+            Guid id,
+            string name,
+            string displayName)
+            : base(id)
+        {
+            SetName(name);
+            SetDisplayName(displayName);
+        }
+
+        internal void SetName(string name)
+        {
+            Name = Check.NotNullOrWhiteSpace(name, nameof(name), OrganizationConsts.MaxNameLength, OrganizationConsts.MinNameLength);
+        }
+
+        public void SetDisplayName(string displayName)
+        {
+            DisplayName = Check.NotNullOrWhiteSpace(displayName, nameof(displayName));
+        }
+    }
+}